67486 + Interview Questions in Secondary School in Physics

1.	Show that when a body is dropped from a certain height, the sum of its kinetic energy at any instant during its fall is constant
Answer» VOLUME of each cube = 64 cm3 ∴ Total volume of the two cubes = 2 × 64 cm3 = 128 cm3 Let the edge of each cube = x ∴ x3 = 64 = 43 ∴ x = 4 CM Now, LENGTH of the resulting cuboid l = 2x cm BREADTH of the resulting cuboid B = x cm Height of the resulting cuboid h = x cm ∴ Surface area of the cuboid = 2 (lb + bh + hl) = 2[(2x . x) + (x . x) + (x . 2x)] = 2[(2 × 4 × 4) + (4 × 4) + (4 × 2 × 4)] cm2 = 2 [32 + 16 + 32] cm2 = 2[80] cm2 = 160 cm2.

1.

Show that when a body is dropped from a certain height, the sum of its kinetic energy at any instant during its fall is constant

Answer»

VOLUME of each cube = 64 cm3

∴ Total volume of the two cubes = 2 × 64 cm3

= 128 cm3

Let the edge of each cube = x

∴ x3 = 64 = 43

∴ x = 4 CM

Now, LENGTH of the resulting cuboid l = 2x cm

BREADTH of the resulting cuboid B = x cm

Height of the resulting cuboid h = x cm

∴ Surface area of the cuboid = 2 (lb + bh + hl) = 2[(2x . x) + (x . x) + (x . 2x)]

= 2[(2 × 4 × 4) + (4 × 4) + (4 × 2 × 4)] cm2

= 2 [32 + 16 + 32] cm2 = 2[80] cm2 = 160 cm2.

Discussion

2.	Derive the expression for the current flowing in an ideal capacitorand its reactance when connected to an ac source of voltageV=V0sinωt
Answer» To derive: The expression for the CURRENT flowing in an ideal capacitor and its reactance when connected to an ac SOURCE of VOLTAGE V=V_(0)sinωt Derivation: Let's consider that a capacitor C has been connected to an alternating current source. So, the CHARGE developed in the capacitor will be: $\sf \therefore \: q = C \times V$ $\sf \implies \: q = C \times V_{0} \sin( \omega t)$ $\sf \implies \: q = C V_{0} \sin( \omega t)$ Now, current passing through the circuit : $\sf \therefore \: i = \dfrac{dq}{dt}$ $\sf \implies \: i= \dfrac{d \bigg \{C V_{0} \sin( \omega t) \bigg \} }{dt}$ $\sf \implies \: i= CV_{0} \times \dfrac{d \bigg \{ \sin( \omega t) \bigg \} }{dt}$ $\sf \implies \: i= CV_{0} \omega \times \cos( \omega t)$ $\sf \implies \: i= CV_{0} \omega \times \sin( \omega t + \dfrac{\pi}{2} )$ $\boxed{ \bf\implies \: i= \dfrac{V_{0}}{ (\frac{1}{ \omega C} )} \times \sin( \omega t + \dfrac{\pi}{2} ) }$ If , we denote the reactance by X_(C): $\boxed{ \bf\implies \: i= \dfrac{V_{0}}{X_{C} } \times \sin( \omega t + \dfrac{\pi}{2} ) }$ Hence, reactance is : $\boxed{ \bf \therefore \: X_{C} = \dfrac{1}{ \omega C} }$ Hope It HELPS.

2.

Derive the expression for the current flowing in an ideal capacitorand its reactance when connected to an ac source of voltageV=V0sinωt

Answer»

To derive:

The expression for the CURRENT flowing in an ideal capacitor and its reactance when connected to an ac SOURCE of VOLTAGE V=V_(0)sinωt

Derivation:

Let's consider that a capacitor C has been connected to an alternating current source.

So, the CHARGE developed in the capacitor will be:

$\sf \therefore \: q = C \times V$

$\sf \implies \: q = C \times V_{0} \sin( \omega t)$

$\sf \implies \: q = C V_{0} \sin( \omega t)$

Now, current passing through the circuit :

$\sf \therefore \: i = \dfrac{dq}{dt}$

$\sf \implies \: i= \dfrac{d \bigg \{C V_{0} \sin( \omega t) \bigg \} }{dt}$

$\sf \implies \: i= CV_{0} \times \dfrac{d \bigg \{ \sin( \omega t) \bigg \} }{dt}$

$\sf \implies \: i= CV_{0} \omega \times \cos( \omega t)$

$\sf \implies \: i= CV_{0} \omega \times \sin( \omega t + \dfrac{\pi}{2} )$

$\boxed{ \bf\implies \: i= \dfrac{V_{0}}{ (\frac{1}{ \omega C} )} \times \sin( \omega t + \dfrac{\pi}{2} ) }$

If , we denote the reactance by X_(C):

$\boxed{ \bf\implies \: i= \dfrac{V_{0}}{X_{C} } \times \sin( \omega t + \dfrac{\pi}{2} ) }$

Hence, reactance is :

$\boxed{ \bf \therefore \: X_{C} = \dfrac{1}{ \omega C} }$

Hope It HELPS.

Discussion

3.	3) An object moving with a speed of 50 m/s takes 8 second to come to rest. The distanceTravelled during this time duration is -l oo
Answer» Explanation: Here you can find activities to practise your writing skills. You can IMPROVE your writing by understanding model TEXTS and how they're structured. The self-study lessons in this section are WRITTEN and organised according to the LEVELS of the Common European Framework of Reference for languages (CEFR). There are different types of model texts, with writing tips and interactive exercises that practise the writing skills you NEED to do well in your studies, to get ahead at work and to communicate in English in your free time. MARK me BRAINLIST please

3.

3) An object moving with a speed of 50 m/s takes 8 second to come to rest. The distanceTravelled during this time duration is -l oo

Answer»

Explanation:

Here you can find activities to practise your writing skills. You can IMPROVE your writing by understanding model TEXTS and how they're structured.

The self-study lessons in this section are WRITTEN and organised according to the LEVELS of the Common European Framework of Reference for languages (CEFR). There are different types of model texts, with writing tips and interactive exercises that practise the writing skills you NEED to do well in your studies, to get ahead at work and to communicate in English in your free time.

MARK me BRAINLIST please

Discussion

4.	Speed of the particles is highest inA) Steel B) water C) air D) Oils
Answer» ANSWER: HEY BUDDY your answer is A) STEEL

4.

Speed of the particles is highest inA) Steel B) water C) air D) Oils

Answer»

ANSWER:

HEY BUDDY

your answer is

A) STEEL

Discussion

5.	10.A block of mass 10kg is kept on a rough horizontal surface. Coefficient of friction between theblock and the ground is 0.2 and block is at rest. Friction force acting on the block is1510 kga) FV3b) F/2c) 20d) 0.2(100+ F/2)
Answer» EXPLANATION: PLZ MARK me as BRAINLIEST

5.

10.A block of mass 10kg is kept on a rough horizontal surface. Coefficient of friction between theblock and the ground is 0.2 and block is at rest. Friction force acting on the block is1510 kga) FV3b) F/2c) 20d) 0.2(100+ F/2)

Answer»

EXPLANATION:

PLZ MARK me as BRAINLIEST

Discussion

6.	ek motor car viramavstha se shuru hokar 10s ke liye 20m/s ke veg se ek saman rup se twarit hoti h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay duri 640m h to kul samay gyat karo
Answer» ANSWER: ek motor car viramavstha se shuru hokar 10s ke LIYE 20m/s ke veg se ek saman rup se twarit HOTI h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay DURI 640m h to kul samay gyat karo

6.

ek motor car viramavstha se shuru hokar 10s ke liye 20m/s ke veg se ek saman rup se twarit hoti h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay duri 640m h to kul samay gyat karo

Answer»

ANSWER:

ek motor car viramavstha se shuru hokar 10s ke LIYE 20m/s ke veg se ek saman rup se twarit HOTI h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay DURI 640m h to kul samay gyat karo

Discussion

7.	A box is pushed toward the right across a classroom floor as shown.If a force vector for friction was added to the diagram, in which way would it be directed to?
Answer» ANSWER: sliding FRICTION PLEASE MARK me as brainliest

7.

A box is pushed toward the right across a classroom floor as shown.If a force vector for friction was added to the diagram, in which way would it be directed to?

Answer»

ANSWER:

sliding FRICTION PLEASE MARK me as brainliest

Discussion

8.	24. A block of mass m and a pan of equal mass are connectedby a string going over a smooth light pulley as shown infigure (9-W17). Initially the system is at rest when aparticle of mass m falls on the pan and sticks to it. Ifthe particle strikes the pan with a speed u find the speedwith which the system moves just after the collision.
Answer» $\huge{\boxed{\red{\bf{Kris \: Wu:-}}}}$

8.

24. A block of mass m and a pan of equal mass are connectedby a string going over a smooth light pulley as shown infigure (9-W17). Initially the system is at rest when aparticle of mass m falls on the pan and sticks to it. Ifthe particle strikes the pan with a speed u find the speedwith which the system moves just after the collision.

Answer»

$\huge{\boxed{\red{\bf{Kris \: Wu:-}}}}$

Discussion

9.	Schrodinger's equation is required for explaining behavior of subatomic particles beacause
Answer» Answer: The Schrödinger equation (also known as Schrödinger’s wave equation) is a partial differential equation that describes the dynamics of quantum mechanical systems via the wave function. The trajectory, the positioning, and the energy of these systems can be retrieved by solving the Schrödinger equation. All of the information for a subatomic particle is encoded within a wave function. The wave function will satisfy and can be solved by using the Schrodinger equation. The Schrodinger equation is one of the fundamental axioms that are introduced in undergraduate physics. It is also increasingly common to find the Schrödinger equation being introduced within the electrical engineering SYLLABUS in universities as it is APPLICABLE to semiconductors. Unfortunately, it is only stated as a postulate in both cases and never derived in any MEANINGFUL way. This is quite dissatisfying as nearly everything else taught in undergraduate quantum physics is built upon this foundation. In this article, we will derive the equation from scratch and I’ll do my best to show every step taken. Interestingly ENOUGH, the arguments we will make are the same as those taken by Schrödinger himself so you can see the lines of thinking a giant was making in his time.

9.

Schrodinger's equation is required for explaining behavior of subatomic particles beacause

Answer»

Answer:

The Schrödinger equation (also known as Schrödinger’s wave equation) is a partial differential equation that describes the dynamics of quantum mechanical systems via the wave function. The trajectory, the positioning, and the energy of these systems can be retrieved by solving the Schrödinger equation.

All of the information for a subatomic particle is encoded within a wave function. The wave function will satisfy and can be solved by using the Schrodinger equation. The Schrodinger equation is one of the fundamental axioms that are introduced in undergraduate physics. It is also increasingly common to find the Schrödinger equation being introduced within the electrical engineering SYLLABUS in universities as it is APPLICABLE to semiconductors.

Unfortunately, it is only stated as a postulate in both cases and never derived in any MEANINGFUL way. This is quite dissatisfying as nearly everything else taught in undergraduate quantum physics is built upon this foundation. In this article, we will derive the equation from scratch and I’ll do my best to show every step taken.

Interestingly ENOUGH, the arguments we will make are the same as those taken by Schrödinger himself so you can see the lines of thinking a giant was making in his time.

Discussion

10.	The endgion used in gslv mk 3
Answer» EXPLANATION: VIKAS engines hope it HELPS...☺☺✌✌

10.

The endgion used in gslv mk 3

Answer»

EXPLANATION:

VIKAS engines

hope it HELPS...☺☺✌✌

Discussion

11.	Name the india's first solar mission of isro
Answer» hello CLASS="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=question" title="question"> NAME the india's first solar mission of isro? $answer$ The Aditya-1 mission was conceived as a 400kg class satellite carrying one payload, the Visible Emission LINE Coronagraph (VELC) and was planned to launch in a 800 KM low earth orbit. $hope \: you \: are \: understood$ The Aditya-1 mission was conceived as a 400kg class satellite carrying one payload, the Visible Emission Line Coronagraph (VELC) and was planned to launch in a 800 km low earth orbit.

11.

Name the india's first solar mission of isro

Answer»

hello

CLASS="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=question" title="question">

NAME the india's first solar mission of isro?

$answer$

The Aditya-1 mission was conceived as a 400kg class satellite carrying one payload, the Visible Emission LINE Coronagraph (VELC) and was planned to launch in a 800 KM low earth orbit.

$hope \: you \: are \: understood$ The Aditya-1 mission was conceived as a 400kg class satellite carrying one payload, the Visible Emission Line Coronagraph (VELC) and was planned to launch in a 800 km low earth orbit.

Discussion

12.	What makes a computer similar to living things?
Answer» Answer: Living ORGANISMS traditionally exist, reproduce and change ... LIFE and life-like entities PRODUCED by COMPUTER technology.

12.

What makes a computer similar to living things?

Answer»

Answer:

Living ORGANISMS traditionally exist, reproduce and change ... LIFE and life-like entities PRODUCED by COMPUTER technology.

Discussion

13.	Bullet moving with a velocity of hundred metre per second the strike wooden plank after passing through the plank of 1 metre length its velocity reduced to 50 metres per second. calculate the average retardation of the bullet while passing through the plank.how much time it take to reach the other end of the plank
Answer» Answer: Given : ➡️ initial velocity = u = 100 m/s ➡️ final velocity = v = 50 m/s ➡️ distance = s = 1 metre To find : ➡️ AVERAGE retardation while passing through the plank(a) ➡️ time taken while passing through the plank (t) Solution : According to newton's 3rd law of motion, v square - u square = 2as substituting the VALUES of v,u and a, we get {(50)×(50)-(100)×(100)} m/s = (2×a×1)m/s that is, (2500 - 10000)m/s = (2a)m/s that is, a = -7500/2 m/s square that is, a = -3725 m/s square HENCE, average retardation of the bullet while passing through the plank is - 3725 m/s square According to newton's first law of motion, we have v=u+at Now substituting the values of v,u and a, we get 50m/s = (100 +(-3725)t) m/s that is, 50m/s - 100 m/s = -3725t m/s that is, 50m/s = 3725×t m/s that is, t = 3725/50 s = 78.5 Hence, time taken while passing through the plank is 78.5 second.

13.

Bullet moving with a velocity of hundred metre per second the strike wooden plank after passing through the plank of 1 metre length its velocity reduced to 50 metres per second. calculate the average retardation of the bullet while passing through the plank.how much time it take to reach the other end of the plank

Answer»

Answer:

Given :

➡️ initial velocity = u = 100 m/s

➡️ final velocity = v = 50 m/s

➡️ distance = s = 1 metre

To find :

➡️ AVERAGE retardation while passing through the plank(a)

➡️ time taken while passing through the plank (t)

Solution :

According to newton's 3rd law of motion,

v square - u square = 2as

substituting the VALUES of v,u and a, we get

{(50)×(50)-(100)×(100)} m/s = (2×a×1)m/s

that is, (2500 - 10000)m/s = (2a)m/s

that is, a = -7500/2 m/s square

that is, a = -3725 m/s square

HENCE, average retardation of the bullet while passing through the plank is - 3725 m/s square

According to newton's first law of motion, we have

v=u+at

Now substituting the values of v,u and a, we get

50m/s = (100 +(-3725)t) m/s

that is, 50m/s - 100 m/s = -3725t m/s

that is, 50m/s = 3725×t m/s

that is, t = 3725/50 s = 78.5

Hence, time taken while passing through the plank is 78.5 second.

Discussion

14.	Please tell me correct answer step by step explain please send answer as screen shot please
Answer» ANSWER: B Explanation: b

14.

Please tell me correct answer step by step explain please send answer as screen shot please

Answer»

ANSWER:

B

Explanation:

b

Discussion

15.	The mass of an object is 1kg. the weight of that object is please help me with the ans
Answer» ANSWER: It is quite EASY We know that Force - MASS × acceleration WEIGHT - 1kg × 9.8ms^-2 9.8 KG ms^-2 For weight calculation acceleration = g(9.8ms^-2)

15.

The mass of an object is 1kg. the weight of that object is please help me with the ans

Answer»

ANSWER:

It is quite EASY We know that

Force - MASS × acceleration

WEIGHT - 1kg × 9.8ms^-2

9.8 KG ms^-2

For weight calculation acceleration = g(9.8ms^-2)

Discussion

16.	A 200-h.p. 1000-V, 25-c/s, star-connected induction motor has a star-connected, slip-ring rotor with a transformation ratio of 3.6 : 1. The rotor resistance per phase is 0.01Ω and inductance 0.64 mH. The stator losses may be neglected. Find: a) the rotor starting current per phase on normal voltage with slip-rings short-circuited; b) the rotor power factor at starting; c) the rotor current at 3% slip; d) the rotor power factor at 3% slip; e) the necessary external resistance per phase to obtain a starting current of approximately 30 A in thestator.
Answer» ANSWER: hccucuc G LINK to the FILE for DIVORCE and

16.

A 200-h.p. 1000-V, 25-c/s, star-connected induction motor has a star-connected, slip-ring rotor with a transformation ratio of 3.6 : 1. The rotor resistance per phase is 0.01Ω and inductance 0.64 mH. The stator losses may be neglected. Find: a) the rotor starting current per phase on normal voltage with slip-rings short-circuited; b) the rotor power factor at starting; c) the rotor current at 3% slip; d) the rotor power factor at 3% slip; e) the necessary external resistance per phase to obtain a starting current of approximately 30 A in thestator.

Answer»

ANSWER:

hccucuc G LINK to the FILE for DIVORCE and

Discussion

17.	Page No.Datetwo identicallongsolenoid xandcarries equal correntthomagnetic rield Producedtholo axialmidpointbothsolenoids joinedeach othen according toFig. theaxlalmidpointsolenoid isis Bmag, rieldBsro+)600Y у(۱۱۱)CNL)JU50rommCON, 21)8B12qB
Answer» ANSWER: THANK you FREE POINT.....

17.

Page No.Datetwo identicallongsolenoid xandcarries equal correntthomagnetic rield Producedtholo axialmidpointbothsolenoids joinedeach othen according toFig. theaxlalmidpointsolenoid isis Bmag, rieldBsro+)600Y у(۱۱۱)CNL)JU50rommCON, 21)8B12qB

Answer»

ANSWER:

THANK you FREE POINT.....

Discussion

18.	What is physics............?
Answer» EXPLANATION: PHYSICS is the natural SCIENCE that studies matter, its motion and behavior through space and TIME, and the related entities of energy and force. Physics is one of the most fundamental SCIENTIFIC disciplines, and its main goal is to understand how the universe behaves.

18.

What is physics............?

Answer»

EXPLANATION:

PHYSICS is the natural SCIENCE that studies matter, its motion and behavior through space and TIME, and the related entities of energy and force. Physics is one of the most fundamental SCIENTIFIC disciplines, and its main goal is to understand how the universe behaves.

Discussion

19.	What's the displacement of a body which is thrown vertically up with a velocity of 30 m/s after 6 seconds
Answer» Answer: 4.9m/s Explanation: Velocity HALF SECOND before maximum height = Velocity half second after maximum height (Return journey) For DOWNWARD journey : Initial velocity u=0 m/s We have g=9.8 m/s2 Time t=21 s Thus velocity after half second v=u+gt v=0+9.8×21=4.9m/s Hope this will HELP you If this is helps you MARK me as Brainlist

19.

What's the displacement of a body which is thrown vertically up with a velocity of 30 m/s after 6 seconds

Answer»

Answer:

4.9m/s

Explanation:

Velocity HALF SECOND before maximum height = Velocity half second after maximum height (Return journey)

For DOWNWARD journey :

Initial velocity u=0 m/s

We have g=9.8 m/s2

Time t=21 s

Thus velocity after half second v=u+gt

v=0+9.8×21=4.9m/s

Hope this will HELP you

If this is helps you MARK me as Brainlist

Discussion

20.	The SI unit of measuring resistance of a conductor is *
Answer» ANSWER: OHM is the answer for the QUESTION

20.

The SI unit of measuring resistance of a conductor is *

Answer»

ANSWER:

OHM is the answer for the QUESTION

Discussion

21.	1 / 1NUMERICALS1. A200kg motorcycle is moving over a horizontal road with uniform velocity. If this motorcycle has to be stopped with a negative acceleration of 1.5m/s2 , hen what is the force of friction between the tyre of the motorcycle and the road? 2. An iron sphere of 1kg is moving a velocity of 20m/s on a cemented floor. It comes to rest after traveling a distance of 50 m. Find the force of friction between the sphere and the floor. 3. A ball of mass 100g moving with a velocity of 0m/s is stopped by a boy in 0.2s. Calculate the force applied by the boy to stop the ball. 4. A car weighing 2400 kg and moving with a velocity of 20 m/s is stopped in 10s on applying breaks. Calculate the retardation and retarding force? 5. A car of mass 1000kg and a bus of mass 8000kg are moving with the same velocity of 36 km/h. Find the forces to stop both the car and the bus in 5s. 6. A mechanic strikes a nail with a hammer of mass 500g moving with a velocity of 20m/s The hammer comes to rest in 0.02s.after striking the nail. Calculate the force exerted by the nail on the hammer. 7. A bullet of mass 10g traveling with a velocity of 100 m/s penetrates in a wooden plank and is brought to rest in 0.01s Find (a) the distance through which the bullet penetrates in the wooden plank and (b) the force exerted on the bullet. 8. A bullet of mass 100g is fired from a gun of mass 20 kg with a velocity of 100m/s. Calculate the velocity of recoil of the gun. 9. Two bodies each of mass 1kg are moving in a straight line but opposite in direction with the same velocity of 2m/s. They collide with each other and stick to each other after collision. What is the common velocity of these bodies after collision?
Answer» ANSWER: whatttytttys,we sjxoskqmw Explanation: kdlwla, znxb

21.

1 / 1NUMERICALS1. A200kg motorcycle is moving over a horizontal road with uniform velocity. If this motorcycle has to be stopped with a negative acceleration of 1.5m/s2 , hen what is the force of friction between the tyre of the motorcycle and the road? 2. An iron sphere of 1kg is moving a velocity of 20m/s on a cemented floor. It comes to rest after traveling a distance of 50 m. Find the force of friction between the sphere and the floor. 3. A ball of mass 100g moving with a velocity of 0m/s is stopped by a boy in 0.2s. Calculate the force applied by the boy to stop the ball. 4. A car weighing 2400 kg and moving with a velocity of 20 m/s is stopped in 10s on applying breaks. Calculate the retardation and retarding force? 5. A car of mass 1000kg and a bus of mass 8000kg are moving with the same velocity of 36 km/h. Find the forces to stop both the car and the bus in 5s. 6. A mechanic strikes a nail with a hammer of mass 500g moving with a velocity of 20m/s The hammer comes to rest in 0.02s.after striking the nail. Calculate the force exerted by the nail on the hammer. 7. A bullet of mass 10g traveling with a velocity of 100 m/s penetrates in a wooden plank and is brought to rest in 0.01s Find (a) the distance through which the bullet penetrates in the wooden plank and (b) the force exerted on the bullet. 8. A bullet of mass 100g is fired from a gun of mass 20 kg with a velocity of 100m/s. Calculate the velocity of recoil of the gun. 9. Two bodies each of mass 1kg are moving in a straight line but opposite in direction with the same velocity of 2m/s. They collide with each other and stick to each other after collision. What is the common velocity of these bodies after collision?

Answer»

ANSWER:

whatttytttys,we sjxoskqmw

Explanation:

kdlwla, znxb

Discussion

22.	Determine the tension in the string and the acceleration of the system, assuming that thepulley is frictionless,med me
Answer» ANSWER: determine the tension in the string and the SYSTEM assuming that

22.

Determine the tension in the string and the acceleration of the system, assuming that thepulley is frictionless,med me

Answer»

ANSWER:

determine the tension in the string and the SYSTEM assuming that

Discussion

23.	A steel rod of 4m long and 30mm diameter is connected to two grips and the rod is maintained at a temperature of 70° C. find out the force exerted by the rod after it has been cooled to 25°C, if a) the ends do not yield, and b) the ends yield by 1.5mm. TakeE=2.1X105N/mm2. Coefficient of linear expansion as 12x10-6/ °C.
Answer» $answer$ b PART is correct COEFFICIENT is 2.1×105N as 12×10-6 °C I HOPE it helps you ...

23.

A steel rod of 4m long and 30mm diameter is connected to two grips and the rod is maintained at a temperature of 70° C. find out the force exerted by the rod after it has been cooled to 25°C, if a) the ends do not yield, and b) the ends yield by 1.5mm. TakeE=2.1X105N/mm2. Coefficient of linear expansion as 12x10-6/ °C.

Answer»

$answer$

b PART is correct

COEFFICIENT is 2.1×105N

as 12×10-6 °C

I HOPE it helps you ...

Discussion

24.	a stone is thrown downwards with velocity 20 m/s from the top of a tower of height 40m. At the same time another stone is projected upwards from the ground along the same line, with the same velocity 20 m/s. when and where do they meet.
Answer» Answer: Sy = UT - 1/2 gt² h=Sy = 20 sin 30° × 5 - 1/2 × 10 × (5)² h=50 - 125 = -75m ( MINUS sign just indicate that the displacement is in downward DIRECTION ) Hmax = u² sin² O/ 2g = (20)² sin² 30°/ 2×10 = 5m Hence, maximum height attained by projectile = h + Hmax = 75×5 = 80m

24.

a stone is thrown downwards with velocity 20 m/s from the top of a tower of height 40m. At the same time another stone is projected upwards from the ground along the same line, with the same velocity 20 m/s. when and where do they meet.

Answer»

Answer:

Sy = UT - 1/2 gt²

h=Sy = 20 sin 30° × 5 - 1/2 × 10 × (5)²

h=50 - 125 = -75m ( MINUS sign just indicate that the displacement is in downward DIRECTION )

Hmax = u² sin² O/ 2g

= (20)² sin² 30°/ 2×10

= 5m

Hence, maximum height attained by projectile = h + Hmax = 75×5 = 80m

Discussion

25.	How does solar energy help us?
Answer» $\huge\star{\green{\underline{\mathfrak{ANSWER:-}}}}$ Solar power systems derive clean, pure ENERGY from the sun. INSTALLING solar panels on your home helps combat greenhouse gas emissions and REDUCES our collective dependence on fossil fuel. Traditional electricity is sourced from fossil fuels such as coal and natural gas. RENEWABLE energy also improves PUBLIC health ${\huge{\overbrace{\underbrace{\purple{Follow\:Me}}}}}$

25.

How does solar energy help us?

Answer»

$\huge\star{\green{\underline{\mathfrak{ANSWER:-}}}}$

Solar power systems derive clean, pure ENERGY from the sun. INSTALLING solar panels on your home helps combat greenhouse gas emissions and REDUCES our collective dependence on fossil fuel. Traditional electricity is sourced from fossil fuels such as coal and natural gas. RENEWABLE energy also improves PUBLIC health

${\huge{\overbrace{\underbrace{\purple{Follow\:Me}}}}}$

Discussion

26.	Find the value of maximum focal length of eye lens mathematically
Answer» Explanation: it depends on where the OBJECT is PLACE . I hope you LIKE my ANSWER and PLEASE follow me

26.

Find the value of maximum focal length of eye lens mathematically

Answer»

Explanation:

it depends on where the OBJECT is PLACE .

I hope you LIKE my ANSWER and PLEASE follow me

Discussion

27.	If the amount of heat radiation of a warm object will be fasterThe surface of the object: (a) is black and uneven (b) is white and uneven (c) is black Is smooth (d) None
Answer» Answer: correct answer Explanation: OPTION A is black and UNEVEN is the correct answer PLS MARK me as brainiest and follow me pls

27.

If the amount of heat radiation of a warm object will be fasterThe surface of the object: (a) is black and uneven (b) is white and uneven (c) is black Is smooth (d) None

Answer»

Answer:

correct answer

Explanation:

OPTION A is black and UNEVEN is the correct answer

PLS MARK me as brainiest and follow me pls

Discussion

28.	তরলের প্রবাহ বেগ যে মানকে অতিক্রম করলে অশান্ত হয় তা কি?
Answer» ANSWER: the WIDTH of the original RECTANGLE on the left? Round to the nearest HUNDREDTH if necessary. 5 meters 8 meters 10 meters 12 meters

28.

তরলের প্রবাহ বেগ যে মানকে অতিক্রম করলে অশান্ত হয় তা কি?

Answer»

ANSWER:

the WIDTH of the original RECTANGLE on the left? Round to the nearest HUNDREDTH if necessary.

5 meters

8 meters

10 meters

12 meters

Discussion

29.	If incident ray falls normally on plane mirror than calculate glancing angle and angle od deviation
Answer» ANSWER: GLANCING ANGLE is 90 DEGREES

29.

If incident ray falls normally on plane mirror than calculate glancing angle and angle od deviation

Answer»

ANSWER:

GLANCING ANGLE is 90 DEGREES

Discussion

30.	2000 kg, along a horizontal track. If the engine exerts a force of 40000 Nand the track offers a friction force of 5000 N, then calculate(a) the net acceleration force,(b) the acceleration of the train and(c) the force of wagon 1 on wagon 2.Question 7. A 8000 kg engine pulls a train of 5 wagons, each of
Answer» Answer: Given : MASS of engine M=8000 kg Mass of each wagon m=2000 kg Frictional force acting in backward direction f=5000 N (a) : The net force acting on the train F ′ =F−f=40000−5000=35000 N (b) : Let the acceleration of the train be a ∴ F ′ =(5m+M)a 35000=(5×2000+8000)a ⟹a=1.944 ms −2 (C) : External force is applied directly to wagon 1 only. The net force on the last four wagons is equal to the force applied by wagon 2 by wagon 1. Let the acceleration of the wagons be a ′ 35000=(5m)a ′ ⟹35000=10000×a ′ Acceleration of the wagons a ′ =3.5 ms −2 Mass of last 4 wagons m ′ =4×2000 kg ∴ Net force on last 4 wagons F 1 =8000×3.5 =28000 N Thus force on wagon 2 by wagon 1 is 28000 N.

30.

2000 kg, along a horizontal track. If the engine exerts a force of 40000 Nand the track offers a friction force of 5000 N, then calculate(a) the net acceleration force,(b) the acceleration of the train and(c) the force of wagon 1 on wagon 2.Question 7. A 8000 kg engine pulls a train of 5 wagons, each of

Answer»

Answer:

Given : MASS of engine M=8000 kg

Mass of each wagon m=2000 kg

Frictional force acting in backward direction f=5000 N

(a) : The net force acting on the train F

′

=F−f=40000−5000=35000 N

(b) : Let the acceleration of the train be a

∴ F

′

=(5m+M)a

35000=(5×2000+8000)a ⟹a=1.944 ms

−2

(C) : External force is applied directly to wagon 1 only. The net force on the last four wagons is equal to the force applied by wagon 2 by wagon 1.

Let the acceleration of the wagons be a

′

35000=(5m)a

′

⟹35000=10000×a

′

Acceleration of the wagons a

′

=3.5 ms

−2

Mass of last 4 wagons m

′

=4×2000 kg

∴ Net force on last 4 wagons F

1

=8000×3.5 =28000 N

Thus force on wagon 2 by wagon 1 is 28000 N.

Discussion

31.	A supply voltage of 250 V ,50 Hz is applied to a series RC circuit . If the power absorbed by the resistor be 400W at 160 V what is the value of the capacitor.
Answer» Artificial INTELLIGENCE (AI) REFERS to the simulation of human intelligence in machines that are programmed to think like humans and mimic their actions. The term may ALSO be applied to any machine that exhibits traits associated with a human mind such as LEARNING and problem-solving.

Discussion

32.	Write down the name 4 fundamental force
Answer» Answer: FUNDAMENTAL force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, ELECTROMAGNETIC, strong, and weak—that govern how OBJECTS or particles interact and how certain particles DECAY.

32.

Write down the name 4 fundamental force

Answer»

Answer:

FUNDAMENTAL force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, ELECTROMAGNETIC, strong, and weak—that govern how OBJECTS or particles interact and how certain particles DECAY.

Discussion

33.	Pressure atthe depth dependson
Answer» ANSWER: PLEASE CLICK on BRAINLISTES please please please please please please please please please please please please please please please click on brainlistes

33.

Pressure atthe depth dependson

Answer»

ANSWER:

PLEASE CLICK on BRAINLISTES please please please please please please please please please please please please please please please click on brainlistes

Discussion

34.	the man bought a piece of land for rupees 853 760 he spend rupees 15469 202 house on it after that he sold the house for rupees 3000000 how much money did
Answer» ANSWER: SINCE,a MAN bought a land for rupees 853760 and spends 15469202on it for HOUSE. =if he sold hus house in 3000000. therefore , his benefits = 853760+15469202=16322962. 16322962-3000000= 13322962 he is in lose by 13322962 rupees.

34.

the man bought a piece of land for rupees 853 760 he spend rupees 15469 202 house on it after that he sold the house for rupees 3000000 how much money did

Answer»

ANSWER:

SINCE,a MAN bought a land for rupees 853760 and spends 15469202on it for HOUSE.

=if he sold hus house in 3000000.

therefore , his benefits = 853760+15469202=16322962.

16322962-3000000= 13322962

he is in lose by 13322962 rupees.

Discussion

35.	For a rod, the increase in length is ‘d’ for 1°C change in temperature. Find the increase in length if temperature change is 10°F.
Answer» Answer: bhai 10 cm INCREASE ho jayi rod KI LENGTH

35.

For a rod, the increase in length is ‘d’ for 1°C change in temperature. Find the increase in length if temperature change is 10°F.

Answer»

Answer:

bhai 10 cm INCREASE ho jayi rod KI LENGTH

Discussion

36.	the focal length of a concave mirror is 15 cm .if an object is placed at a distance of 30cm from the pole, then its image will be formed
Answer» Answer: Since RADIUS of the MIRROR is twice the focal length, center of curvature lies at a distance of 30 CM from the pole. Hence, an OBJECT kept at 30 cm will produce an image of the same size as that of the object.

36.

the focal length of a concave mirror is 15 cm .if an object is placed at a distance of 30cm from the pole, then its image will be formed

Answer»

Answer:

Since RADIUS of the MIRROR is twice the focal length, center of curvature lies at a distance of 30 CM from the pole. Hence, an OBJECT kept at 30 cm will produce an image of the same size as that of the object.

Discussion

37.	calculate the the electrical energy produced in 5 minutes when a current of 2A is sent through a conductor buy potential difference of 500 volts.
Answer» my *DEAR* *FRIEND* *MAKE* me as *BRAINLIEST*.

37.

calculate the the electrical energy produced in 5 minutes when a current of 2A is sent through a conductor buy potential difference of 500 volts.

Answer»

my DEAR FRIEND MAKE me as BRAINLIEST.

Discussion

38.	2. Most of the magnetic strength of magnets actsat its mid point.
Answer» ANSWER: NORTH POLE and SOUTH pole

38.

2. Most of the magnetic strength of magnets actsat its mid point.

Answer»

ANSWER:

NORTH POLE and SOUTH pole

Discussion

39.	an aluminium measuring rod which is correct at 5⁰ c measures a certain distance as 88.42cm at 35⁰c theerror on measuring in the distance due to expansion of the rod is alpha=23×10^-6/1⁰c
Answer» EXPLANATION: jdjdjrrbfhfjjrhrjfornbrhfuehhrudjebfydur

39.

an aluminium measuring rod which is correct at 5⁰ c measures a certain distance as 88.42cm at 35⁰c theerror on measuring in the distance due to expansion of the rod is alpha=23×10^-6/1⁰c

Answer»

EXPLANATION:

jdjdjrrbfhfjjrhrjfornbrhfuehhrudjebfydur

Discussion

40.	A body is thrown vertically up from a certain height and another thrown vertically down from the same point with the same speed at the same time.If they hit the ground with a time gap of 4s, find the speed of projection (g = 10 ms)
Answer» ANSWER: the answer is 8/9 H

40.

A body is thrown vertically up from a certain height and another thrown vertically down from the same point with the same speed at the same time.If they hit the ground with a time gap of 4s, find the speed of projection (g = 10 ms)

Answer»

ANSWER:

the answer is 8/9 H

Discussion

41.	A force of 250 N moves a body through a distance of 2.5 m in the direction of force .Calculate the work done by the force
Answer» Answer: 625 J Explanation: =250N (2.5m) =625 J

41.

A force of 250 N moves a body through a distance of 2.5 m in the direction of force .Calculate the work done by the force

Answer»

Answer:

625 J

Explanation:

=250N (2.5m)

=625 J

Discussion

42.	The velocity of light is minimum in ___(a) air (b) glass (c) water (d) vacuum
Answer» Answer: glass Explanation: vacuum has maximum speed of LIGHT in it .. Glass has highest OPTICAL density so it decreases the VELOCITY of light hope it will help You plz MARK it as brainliest ❤ @ be brainly ☺

42.

The velocity of light is minimum in ___(a) air (b) glass (c) water (d) vacuum

Answer»

Answer:

glass

Explanation:

vacuum has maximum speed of LIGHT in it ..

Glass has highest OPTICAL density so it decreases the VELOCITY of light

hope it will help You

plz MARK it as brainliest ❤

@ be brainly ☺

Discussion

43.	determine the angle of banking so as to minimize the wear and tear of the tyres and the road, when car can travelling at 60km/ h makes a level turn of radius 40m
Answer» EXPLANATION: hxuudd8dyd Sydney s CTC X XXL and x5xx5 s X X XC60 xoxo XXL x7xyx xxxx6x the x7xyx7x xoxo xylitol the company XY to xxhx5

43.

determine the angle of banking so as to minimize the wear and tear of the tyres and the road, when car can travelling at 60km/ h makes a level turn of radius 40m

Answer»

EXPLANATION:

hxuudd8dyd Sydney s CTC X XXL and x5xx5 s X X XC60 xoxo XXL x7xyx xxxx6x the x7xyx7x xoxo xylitol the company XY to xxhx5

Discussion

44.	The most positive word of 2020 is 'Negative'✌️✌️✌️
Answer» ANSWER: TRUE BRO and MARK my answer as BEST answer

44.

The most positive word of 2020 is 'Negative'✌️✌️✌️

Answer»

ANSWER:

TRUE BRO

and MARK my answer as BEST answer

Discussion

45.	What type of energy is when you do physical exercise
Answer» ANSWER: MUSCLES use the stored CHEMICAL energy of food we eat and convert that to heat and energy of motion (kinetic energy).

45.

What type of energy is when you do physical exercise

Answer»

ANSWER:

MUSCLES use the stored CHEMICAL energy of food we eat and convert that to heat and energy of motion (kinetic energy).

Discussion

46.	Q1. A laser produces red light offrequency 4.7 x 10 14 Hz. The speedof light in glass is 2.0 x 10 8 m/s.(a) Calculate the wavelength in glassof light from this laser.
Answer» ANSWER: frequency, f=4×10 14 Hz Wavelength, λ=5×10 −7 m velocity, v=fλ =4×10 14 ×5×10 −7 =20×10 7 v=2×10 8 m/s Refractive INDEX, μ= v c = 2×10 8 3×10 8 μ=1.5. this type this question made

46.

Q1. A laser produces red light offrequency 4.7 x 10 14 Hz. The speedof light in glass is 2.0 x 10 8 m/s.(a) Calculate the wavelength in glassof light from this laser.

Answer»

ANSWER:

frequency, f=4×10

14

Hz

Wavelength, λ=5×10

−7

m

velocity, v=fλ

=4×10

14

×5×10

−7

=20×10

7

v=2×10

8

m/s

Refractive INDEX, μ=

v

c

=

2×10

8

3×10

8

μ=1.5. this type this question made

Discussion

47.	The series limit wavelength of the Lyman series for the hydrogen atom is
Answer» If the series LIMIT wavelength of the LYMAN series for hydrogen atom is 912Å, then the series limit wavelength for the Balmer series for the hydrogen atom is. CLEARLY, λ′=4[1R] or λ′=4λ.

Discussion

48.	In hydrogen atom the ratio of energy difference between second orbit to third orbit and energy difference between first to second orbit will be …………..
Answer» Answer: He drew the curtain aside and for some time his FRIGHTENED, restless eyes could not find the baby. ... She scooted closer to him, frightened and yet INTRIGUED. ... The children were inclined to be frightened by the sight of the small animal, which ... too much frightened at the mischief their DISOBEDIENCE had CAUSED, to admire the . Explanation:

48.

In hydrogen atom the ratio of energy difference between second orbit to third orbit and energy difference between first to second orbit will be …………..

Answer»

Answer:

He drew the curtain aside and for some time his FRIGHTENED, restless eyes could not find the baby. ... She scooted closer to him, frightened and yet INTRIGUED. ... The children were inclined to be frightened by the sight of the small animal, which ... too much frightened at the mischief their DISOBEDIENCE had CAUSED, to admire the .

Explanation:

Discussion

49.	The ratio of the radii of the first three bohr orbits is
Answer» Answer: $\huge \bf \underline \color{blue}answer$ 1:4:9.

49.

The ratio of the radii of the first three bohr orbits is

Answer»

Answer:

$\huge \bf \underline \color{blue}answer$

1:4:9.

Discussion

50.	4030Forceloloo200300400DisplacementWork=?
Answer» ANSWER: HAA haa havdydysykxjydyjdyiziys6i

50.

4030Forceloloo200300400DisplacementWork=?

Answer»

ANSWER:

HAA haa havdydysykxjydyjdyiziys6i

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Show that when a body is dropped from a certain height, the sum of its kinetic energy at any instant during its fall is constant​

Derive the expression for the current flowing in an ideal capacitorand its reactance when connected to an ac source of voltageV=V0sinωt​

To derive:

Derivation:

3) An object moving with a speed of 50 m/s takes 8 second to come to rest. The distanceTravelled during this time duration is -l oo​

MARK me BRAINLIST please

Speed of the particles is highest inA) Steel B) water C) air D) Oils​

10.A block of mass 10kg is kept on a rough horizontal surface. Coefficient of friction between theblock and the ground is 0.2 and block is at rest. Friction force acting on the block is1510 kga) FV3b) F/2c) 20d) 0.2(100+ F/2)​

ek motor car viramavstha se shuru hokar 10s ke liye 20m/s ke veg se ek saman rup se twarit hoti h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay duri 640m h to kul samay gyat karo​

A box is pushed toward the right across a classroom floor as shown.If a force vector for friction was added to the diagram, in which way would it be directed to?

Schrodinger's equation is required for explaining behavior of subatomic particles beacause​

The endgion used in gslv mk 3​

VIKAS engines

hope it HELPS...☺☺✌✌

Name the india's first solar mission of isro​

hello

NAME the india's first solar mission of isro?

What makes a computer similar to living things?

Given :

➡️ initial velocity = u = 100 m/s

➡️ final velocity = v = 50 m/s

➡️ distance = s = 1 metre

To find :

➡️ AVERAGE retardation while passing through the plank(a)

➡️ time taken while passing through the plank (t)

Solution :

According to newton's 3rd law of motion,

v square - u square = 2as

substituting the VALUES of v,u and a, we get

{(50)×(50)-(100)×(100)} m/s = (2×a×1)m/s

that is, (2500 - 10000)m/s = (2a)m/s

that is, a = -7500/2 m/s square

that is, a = -3725 m/s square

HENCE, average retardation of the bullet while passing through the plank is - 3725 m/s square

According to newton's first law of motion, we have

v=u+at

Now substituting the values of v,u and a, we get

50m/s = (100 +(-3725)t) m/s

that is, 50m/s - 100 m/s = -3725t m/s

that is, 50m/s = 3725×t m/s

that is, t = 3725/50 s = 78.5

Hence, time taken while passing through the plank is 78.5 second.

Please tell me correct answer step by step explain please send answer as screen shot please ​

The mass of an object is 1kg. the weight of that object is please help me with the ans​

Page No.Datetwo identicallongsolenoid xandcarries equal correntthomagnetic rield Producedtholo axialmidpointbothsolenoids joinedeach othen according toFig. theaxlalmidpointsolenoid isis Bmag, rieldBsro+)600Y у(۱۱۱)CNL)JU50rommCON, 21)8B12qB​

What is physics............?​

What's the displacement of a body which is thrown vertically up with a velocity of 30 m/s after 6 seconds​

Hope this will HELP you

If this is helps you MARK me as Brainlist

The SI unit of measuring resistance of a conductor is *​

Determine the tension in the string and the acceleration of the system, assuming that thepulley is frictionless,med me​

I HOPE it helps you ...

a stone is thrown downwards with velocity 20 m/s from the top of a tower of height 40m. At the same time another stone is projected upwards from the ground along the same line, with the same velocity 20 m/s. when and where do they meet. ​

How does solar energy help us?

Find the value of maximum focal length of eye lens mathematically​

If the amount of heat radiation of a warm object will be fasterThe surface of the object: (a) is black and uneven (b) is white and uneven (c) is black Is smooth (d) None​

তরলের প্রবাহ বেগ যে মানকে অতিক্রম করলে অশান্ত হয় তা কি?​

the WIDTH of the original RECTANGLE on the left? Round to the nearest HUNDREDTH if necessary.

If incident ray falls normally on plane mirror than calculate glancing angle and angle od deviation​

A supply voltage of 250 V ,50 Hz is applied to a series RC circuit . If the power absorbed by the resistor be 400W at 160 V what is the value of the capacitor.

Write down the name 4 fundamental force​

Pressure atthe depth dependson​

the man bought a piece of land for rupees 853 760 he spend rupees 15469 202 house on it after that he sold the house for rupees 3000000 how much money did​

For a rod, the increase in length is ‘d’ for 1°C change in temperature. Find the increase in length if temperature change is 10°F.​

the focal length of a concave mirror is 15 cm .if an object is placed at a distance of 30cm from the pole, then its image will be formed ​

calculate the the electrical energy produced in 5 minutes when a current of 2A is sent through a conductor buy potential difference of 500 volts.​

my DEAR FRIEND MAKE me as BRAINLIEST.

2. Most of the magnetic strength of magnets actsat its mid point.​

an aluminium measuring rod which is correct at 5⁰ c measures a certain distance as 88.42cm at 35⁰c theerror on measuring in the distance due to expansion of the rod is alpha=23×10^-6/1⁰c​

A body is thrown vertically up from a certain height and another thrown vertically down from the same point with the same speed at the same time.If they hit the ground with a time gap of 4s, find the speed of projection (g = 10 ms)

A force of 250 N moves a body through a distance of 2.5 m in the direction of force .Calculate the work done by the force

The velocity of light is minimum in ___(a) air (b) glass (c) water (d) vacuum​

glass

determine the angle of banking so as to minimize the wear and tear of the tyres and the road, when car can travelling at 60km/ h makes a level turn of radius 40m​

The most positive word of 2020 is 'Negative'✌️✌️✌️​

What type of energy is when you do physical exercise

Q1. A laser produces red light offrequency 4.7 x 10 14 Hz. The speedof light in glass is 2.0 x 10 8 m/s.(a) Calculate the wavelength in glassof light from this laser.​

The series limit wavelength of the Lyman series for the hydrogen atom is

In hydrogen atom the ratio of energy difference between second orbit to third orbit and energy difference between first to second orbit will be …………..

Show that when a body is dropped from a certain height, the sum of its kinetic energy at any instant during its fall is constant

Derive the expression for the current flowing in an ideal capacitorand its reactance when connected to an ac source of voltageV=V0sinωt

3) An object moving with a speed of 50 m/s takes 8 second to come to rest. The distanceTravelled during this time duration is -l oo

Speed of the particles is highest inA) Steel B) water C) air D) Oils

10.A block of mass 10kg is kept on a rough horizontal surface. Coefficient of friction between theblock and the ground is 0.2 and block is at rest. Friction force acting on the block is1510 kga) FV3b) F/2c) 20d) 0.2(100+ F/2)

ek motor car viramavstha se shuru hokar 10s ke liye 20m/s ke veg se ek saman rup se twarit hoti h uske bad yah niyat veg se gati karti h or ant me niyat twaran se gati krti hui 40m bad viramavastha me aa jati h kul tay duri 640m h to kul samay gyat karo

Schrodinger's equation is required for explaining behavior of subatomic particles beacause

The endgion used in gslv mk 3

Name the india's first solar mission of isro

Please tell me correct answer step by step explain please send answer as screen shot please

The mass of an object is 1kg. the weight of that object is please help me with the ans

Page No.Datetwo identicallongsolenoid xandcarries equal correntthomagnetic rield Producedtholo axialmidpointbothsolenoids joinedeach othen according toFig. theaxlalmidpointsolenoid isis Bmag, rieldBsro+)600Y у(۱۱۱)CNL)JU50rommCON, 21)8B12qB

What is physics............?

What's the displacement of a body which is thrown vertically up with a velocity of 30 m/s after 6 seconds

The SI unit of measuring resistance of a conductor is *

Determine the tension in the string and the acceleration of the system, assuming that thepulley is frictionless,med me

a stone is thrown downwards with velocity 20 m/s from the top of a tower of height 40m. At the same time another stone is projected upwards from the ground along the same line, with the same velocity 20 m/s. when and where do they meet.

Find the value of maximum focal length of eye lens mathematically

If the amount of heat radiation of a warm object will be fasterThe surface of the object: (a) is black and uneven (b) is white and uneven (c) is black Is smooth (d) None

তরলের প্রবাহ বেগ যে মানকে অতিক্রম করলে অশান্ত হয় তা কি?

If incident ray falls normally on plane mirror than calculate glancing angle and angle od deviation

Write down the name 4 fundamental force

Pressure atthe depth dependson

the man bought a piece of land for rupees 853 760 he spend rupees 15469 202 house on it after that he sold the house for rupees 3000000 how much money did

For a rod, the increase in length is ‘d’ for 1°C change in temperature. Find the increase in length if temperature change is 10°F.

the focal length of a concave mirror is 15 cm .if an object is placed at a distance of 30cm from the pole, then its image will be formed

calculate the the electrical energy produced in 5 minutes when a current of 2A is sent through a conductor buy potential difference of 500 volts.

2. Most of the magnetic strength of magnets actsat its mid point.

an aluminium measuring rod which is correct at 5⁰ c measures a certain distance as 88.42cm at 35⁰c theerror on measuring in the distance due to expansion of the rod is alpha=23×10^-6/1⁰c

The velocity of light is minimum in ___(a) air (b) glass (c) water (d) vacuum

determine the angle of banking so as to minimize the wear and tear of the tyres and the road, when car can travelling at 60km/ h makes a level turn of radius 40m

The most positive word of 2020 is 'Negative'✌️✌️✌️

Q1. A laser produces red light offrequency 4.7 x 10 14 Hz. The speedof light in glass is 2.0 x 10 8 m/s.(a) Calculate the wavelength in glassof light from this laser.

4030Forceloloo200300400DisplacementWork=?