67486 + Interview Questions in Secondary School in Physics

1.	Determine the acceleration when t=1s if v=(4t2+2) m/s where t is in seconds
Answer» I THINK 10-u but i am not SURE

Discussion

2.	The radius of gyration of a body about an axis at a distance 4cm from its centre of mass is 5cm. Radius of gyration about a parallel axis passing through its centre of mass is
Answer» Dear STUDENT , I = m(r+x)2 where I is the moment of inertia and m is the mass of the body. here r+x = k where k is the RADIUS of gyration , r is the radius of the object and x is the perpendicular distance of AXIS from Centre Of Mass. So , Radius of Gyration about a parallel axis passing through its centre of mass = r ( as x is now ZERO ). So r = k Thus , new radius of gyration , k = r = 10cm - 6cm = 4cm

Discussion

3.	What kind of enery posses by the following (a) Flowing water (b) water stored in dam (c) wrist watch
Answer» A) kinetic ENERGY b) potential energy c) mechanical energy

Discussion

4.	How do you perceive an object to be in motion answer
Answer» $When an object changes it's position with time then it is said to be in motion.$

Discussion

5.	Define light wave????? Fast plzz
Answer» LIGHT WAVE is a wave which TRAVELS at a SPEED of 3×10^8 ms^-1 and light wave travels slower than the sound wave.

Discussion

6.	I want an brief explanation of this question.
Answer» USE snth SECOND FORMULA to FIND the DISTANCE

Discussion

7.	Calculate the viscous force on a ball of radius 1mm moving through a liquid of viscosity 0.2Nsmpower-1 at the speed of 0.07mspower-1.
Answer» Given, radius of the ball , R = 1mm = 0.001m VISCOSITY of liquid , $\eta$ = 0.2 Ns/m² and terminal velocity or SPEED , v = 0.07 m/s now, use formula $F=6\pi\eta rv$ where F represents viscous FORCE. so, F = 6 × 3.14 × 0.2 × 0.001 × 0.07 F = 0.00026376 N hence, viscous force = 2.6376 × 10^-4 N

Discussion

8.	The temperature of the place increases uniformly from 20 degree celsius to 30 degree celsius from 9a.M. To 2 p.M. What was the temperature at noon
Answer» 26 DEGREE 30-20=10 10 degree C INCREASE in 5 hour so in 1 hour it will increase 10/5 I.e.2 degree c at noon 12-9=3 after 3 hour the temperature will be 3*2+20=26

Discussion

9.	Define microstate and macrostate in physics .Give one example
Answer» In PHYSICS, a microstate is DEFINED as the arrangement of each molecule in the system at a single INSTANT. A macrostate is defined by the macroscopic PROPERTIES of the system, such as temperature, pressure, volume, etc. For each macrostate, there are many microstates which result in the same macrostate.

Discussion

10.	Calculate wavelength of sound if frequency is 550 hz and speed is 440
Answer» v=f×WAVE LENGTH Wave length =v/f 440/550 0.8 Wave length = 0.8

10.

Calculate wavelength of sound if frequency is 550 hz and speed is 440

Answer»

v=f×WAVE LENGTH

Wave length =v/f

440/550

0.8

Wave length = 0.8

Discussion

11.	Y light is considered to be energy... what works can light perform....
Answer» $\huge\mathbb\purple{HELLO\:DEAR}$ $\huge\boxed{\texttt{\fcolorbox{Red}{aqua} {ANSWER : }}}$ ⭐ WHAT IS LIGHT? ⭐ - Light is a form of energy which enables the sensation of vision in our eyes. ⭐ TWO PHENOMENON THAT LIGHT UNDERGOES ⭐ - 1) Reflection - 2) Refraction ======================================== NOW, ACCORDING TO YOUR QUESTION, ⭐ Light is considered to be a form of energy because it has the ability or capacity to PRODUCE the sensation of vision in HUMAN eyes. ⭐ Light has ALSO the ability to travel with highest speed than all other FORMS of energy. ✨✨✨✨ ALWAYS BE BRAINLY ✨✨✨✨

Discussion

12.	Characterstics of image formed by convex mirror
Answer» Hey mate! Here is your answer. The image is always virtual and erect. The image is highly diminished or POINT sized. It is always FORMED between F and P. The object and image are on opposite sides of mirror. Please mark my answer as BRAINLIEST.

Discussion

13.	A type of flow in which viscosity increases when the substance is agitated is
Answer» MAYBE....PSEUDOPLASTIC FLOW is the ANSWER

Discussion

14.	A wire, 1.2mm in diameter and 32 cm long, carries a current of 648 ma. The density of free electrons in the wire is 5.90 × 1028m-3.The drift velocity of electrons in the wire is:
Answer» Volume of WIRE = $\pi$ * ( $d^{2}$ / 4) * L = 3.14 * ((0.00120.0012)/4) 0.032 = 3.6 * $<klux>10</klux>^{-8}$ *Current = number of ELECTRONS e * Drift velocity** Drift velocity = Current / (number of electrons * e) = 0.648 / (3.6 * $10^{-8}$ * 5.90 * $10^{28}$ * 1.6 * 10 * $10^{-19}$ ) = 0.00019067796 m/sec

14.

A wire, 1.2mm in diameter and 32 cm long, carries a current of 648 ma. The density of free electrons in the wire is 5.90 × 1028m-3.The drift velocity of electrons in the wire is:

Answer»

Volume of WIRE = $\pi$ * ( $d^{2}$ / 4) * L

= 3.14 * ((0.0012*0.0012)/4) * 0.032

= 3.6 * $<klux>10</klux>^{-8}$

Current = number of ELECTRONS * e * Drift velocity

Drift velocity = Current / (number of electrons * e)

= 0.648 / (3.6 * $10^{-8}$ * 5.90 * $10^{28}$ * 1.6 * 10 * $10^{-19}$ )

= 0.00019067796 m/sec

Discussion

15.	State the physical significances of gradient of a scalar field
Answer» the GRADIENT of a scalar FIELD is a vector .The DIRECTION of this vector tells you the direction of deepest INCREASE of the scalar field,WHEREAS the magnitude tells you the amount of this deepest increase

Discussion

16.	A truck is moving on a frictionless surface with uniformvelocity of 10 ms–1. A leak occurs in the water tank of the truck at the rate of 2 kgs–1. What is the speed of truck after 50 s if the mass of truck is 100 kg and mass of water in the truck initially was 100 kg ?
Answer» Plz refer to the solution PROVIDED by me HOPE it helps PLS MARK it as brainliest

Discussion

17.	What is stoke's law give example
Answer» Heya MATE here is your answer a law stating that in fluorescence the WAVELENGTH of the emitted radiation is longer than that of the radiation causing it. This is not true in all cases. an expression DESCRIBING the resisting force on a particle moving through a viscous fluid and showing that a maximum velocity is reached in such cases, e.g. for an object falling under gravity through a fluid. Imagine a SPHERE with fluid flowing AROUND it. hope it helps Mark as BRAINLIEST if you like and follow me

Discussion

18.	What is convection?
Answer» The PROCESS in which heat moves through a gas or a liquid as the hotter PART rises and the COOLER, heavier part SINKS is called convection. Thank You!

Discussion

19.	Find speed when,distance is 142km and is 2hours
Answer» HEY MATE! SPEED =DISTANCE /TIME =142/2 =71 HENCE,SPEED IS 71 KM/H

Discussion

20.	Sukha hai ak kilo gila hai hai to do kilo jalane par teen kilo
Answer» HEY MATE HERE IS UR ANSWER IS SPACE AND SUGAR

Discussion

21.	A travels at 40kmph and b travels at 60kmph. They aretraveling towards e ach other and start at the same time.By the time they meet, b would have travelled 120kmmore thana. Find the total distance.
Answer» Further, space is a vacuum, meaning that sound cannot carry because molecules are not close enough together to transmit sound between them. That's not to say that space is empty, however. Gas, DUST and other bits of matter float around "emptier" areas of the universe, while more crowded regions can host planets, stars and galaxies. No one knows exactly how big space is. The difficulty arises because of what we can SEE in our detectors. We measure long distances in space in "light-YEARS," representing the distance it takes for light to travel in a year (roughly 5.8 trillion miles, or 9.3 trillion kilometers). From light that is VISIBLE in our telescopes, we have charted galaxies reaching almost as far back as the Big Bang, which is thought to have started our universe 13.7 billion years ago. This means we can "see" into space at a distance of almost 13.7 billion light-years. However, ASTRONOMERS are not sure if our universe is the only universe that exists. This means that space could be a lot bigger than it appears to us. SORRY for wrong answer!

Discussion

22.	Speed=3km/h, distance=12km what change should be done in the speed to take(1)an hour less and (2)an hour more to cover the distance
Answer» Inverse variation Speed. TIME 3kmph. 4(it TAKES 4 hrs to cover 12 km in that speed X. 3 3x=12 X=4kmph After doing same for an HOUR more and TAKING time as 5hrs we get 5x=12 x=12/5=2.4kmph

22.

Speed=3km/h, distance=12km what change should be done in the speed to take(1)an hour less and (2)an hour more to cover the distance

Answer»

Inverse variation

Speed. TIME

3kmph. 4(it TAKES 4 hrs to

cover 12 km in that

speed

X. 3

3x=12

X=4kmph

After doing same for an HOUR more and TAKING time as 5hrs we get

5x=12

x=12/5=2.4kmph

Discussion

23.	Why do we use alloys as conducting wires for electric heating appliances like bread toaster and electric iron
Answer» We use ALLOYS for conducting WIRES in HEATING APPLIANCES because alloys have greater resistance than normal wire which allows to heat up very QUICKLY .

Discussion

24.	the radius of solid sphere R and it's density d when it is made to rotate about an axis passing through any diameter of sphere expression for its moment of inertia is
Answer» Your ANSWER is MR^2/8

Discussion

25.	Explain in detail.......All ... questions....
Answer» I THINK this is HELPFUL for you please MARK me as BRAINLIST

Discussion

26.	Can anyone solve this question ??
Answer» Ans 9: the length from the centre of the earth surface is 6400 km therefore the subsequent the weight of the weight of man on surface of earth let be x so to reach its has made the man has to go HALF into the earth that is 3200 km full stop also it is due to the fact that as we reach the centre of the earth the subsequent to it is zero so to reach BEHALF rate it has to be HALFWAY from the Earth surface ans 10 :similarly to get the half weight again we need to assume upon the fact that as we go above the earth the weight of men DECREASES as we go Halfway about the earth that is at 26 50 km will reach half way to get half weight of the man

Discussion

27.	A 4 kg object is slowly lowered by 1.5 m how much work is done against Gravity
Answer» FIND this ANSWER........

Discussion

28.	A train is moving at the speed of 60 m per second at 10 o'clocka.M. At 80 m per second at 10:02 am . Assuming that the train moves along striaght track and the acceleration is constant , the value of acceleration is
Answer» INITIAL VELOCITY =60m/s, FINAL velocity =80m/s TIME= 2S acceieration.-- v=u+at= 10m/s

28.

A train is moving at the speed of 60 m per second at 10 o'clocka.M. At 80 m per second at 10:02 am . Assuming that the train moves along striaght track and the acceleration is constant , the value of acceleration is

Answer»

INITIAL VELOCITY =60m/s, FINAL velocity =80m/s TIME= 2S

acceieration.-- v=u+at= 10m/s

Discussion

29.	A train can travel 20% faster than a bus. Both start from the point a at the same time and reach point b 75 km away from a at the same time. But the train stopped for 12.5 minutes while stopping at the stations. Find the speed of the bus in km/hr.
Answer» Let the SPEED of BUS be x kmph. Therefore, the speed of TRAIN = 50/100 x + x = 150/100 x = 1.5x Distance TRAVELED by train and bus is same. Time difference is 12.5 minutes so, using s = d/t time taken by train to cover 75 km = 75/x time taken by bus = 75/1.5x so now, Time difference is 12.5 minutes so, time taken by train - time taken by bus = 12.5 75/x - 75/1.5x = 12.5 /60 x = 120

Discussion

30.	Can anyone help me out??
Answer» WAHN LIKH HAI in the above QS if the distance above qs kidr hai

Discussion

31.	Explain in detail.........Try to answer 5 6 7 questions..
Answer» I THINK this is HELPFUL for you please MARK me as BRAINLIST

Discussion

32.	Answer is 4th option.......
Answer» HEY FRIEND HERE YOUR ANSWER 4)4π²mn² I HOPE IT'S HELP YOU MARK BRAINIEST MY ANSWER

Discussion

33.	An object p is moving with a constant velocity for 5 mins and a object q is moving with changing velocity for 5 mins out of these two objects which one has acceleration explain
Answer» ACCELERATION is the RATE of change of VELOCITY. Since object P moves with a constant velocity, it has no acceleration but object q has acceleration since its velocity is constantly changing.

Discussion

34.	Did you find any example od human interference in these ecosystems
Answer» The Humans pollute land from the air with unwanted refuse and ALMOST 2.4 billion people does not access the CLEAN water. However, this147 metric tons of air pollution caused by air pollution are deadly for block out the sun in a dense HAZE. There are beach in the world that doesn’t have litter with the Humans PRODUCE about 300 million tons of plastic each YEAR.

34.

Did you find any example od human interference in these ecosystems

Answer»

The Humans pollute land from the air with unwanted refuse and ALMOST 2.4 billion people does not access the CLEAN water.

However, this147 metric tons of air pollution caused by air pollution are deadly for block out the sun in a dense HAZE.

There are beach in the world that doesn’t have litter with the Humans PRODUCE about 300 million tons of plastic each YEAR.

Discussion

35.	An object is placed at a finite distance from a concave mirror produces an image at a distance of 20cm .If the radius of curvature is R and follow length is for give a magnification of 2 .Then determine position of object and focal length of a concave mirror .
Answer» BA ba blacksheep have you any WOOL yes sir yes sir i dont know this ANSWER

Discussion

36.	Two blocks of masses 5 kg and 10 kg are connected by massless spring. A force of 10 N acts on 10 kg mass. At the instant 5 kg mass has an acceleration of 0.2 m/s, the acceleration of 10 kg mass would beExplain in detail..WILL be MARKED as BRAINLIAST..
Answer» I THINK this is HELPFUL for you PLEASE MARK me as BRAINLIST

Discussion

37.	Frequency of a source of sound is 250Hz.how many times does it vibrate in a minute?
Answer» 1/15000 is TGE ANSWER

Discussion

38.	A resistor of 200 ohm and a capacitor of 15micro farad are connected in series to a 220v ,50hz ac source.Calculate the current in the circuit and the rms voltage across the resistor and the capacitor.Is the algebraic sum of these voltages more than the source voltage
Answer» Given that R = 200Ω C = 15 μF = 15 × 10–6 F ξ = ξ sinωt ξ = 220 V f = 50 Hz W = 2πf = (100π) rad/s ξ = 220 sin (100π) REACTANCE of capacitor Xc = 1/ We = 1 / 100 * pi * 15 * 10^-6 = 10^6 / 314 * 15 = 212.31 ohm So, impedance Z = sqrt (R^2 + X^2) Z = sqrt (200^2 + 212.31^2) = 291.67 ohm I = E / Z = 220 sin (100* pi * t) / 291.67 = 0.75 sin (100 * pi *t) Irms = 0.75A Voltage across capacitor VR = Irms × XC = 0.75 × 200 = 150 volt Voltage across capacitor VC = Irms × XC = 0.75 × 212.31 = 159.23 volt

Discussion

39.	The temperature today is 7 degrees celsius. Yesterday it was 13 degrees celsius cooler. What was the temperature yesturday?
Answer» -20 DEGREE Celcius 7+13

Discussion

40.	Two blocks of mass 4 kg and 2 kg are placed side by side on a smooth horizontal surface as shown in the figure . A horizontal force of 20 N is applied on 4 kg block , that acceleration of each block and the normal reaction between the two blocks ______EXPLAIN IN DETAIL.WILL BE MARKED AS BRAINLIAST ..FAST..
Answer» I THINK this is helpful for you please MARK me as brainlist please l NEED you mark.......

Discussion

41.	A train starts from a railway station and its motion is observed as follows. Find the average speed of the train in km/hr.
Answer» Here Initial velocity (U) = 0 Final velocity (v)=40km/hr = 40 multiple by 5/18 m/s = 100/9 =11.11 m/s Time (t) = 10 min = 10 multiple with 60 s = 600 s Therefore Acceleration = final velocity — initially velocity / time taken =11.11 — 0 / 600 m/s SQ = 0.0185 m/s sq Hence verified……….

Discussion

42.	calculate the amount of work done to in drawing a bucket of water weighing 15 kg from a well of depth 30m
Answer» Work=mgh m=15 g=9.8 h=30m work=15×9.8×30 =4410 JOULE

Discussion

43.	Calculate no of sulphurs and oxygen in 80g of sulphur triode
Answer» One GRAM atom is the atomic weight EXPRESSED in grams.Sulfur has an atomic wt of 32,and the gram atom is 32 GMS oof sulfur. The GIVEN value of 8 gms therefore will have 0.25 Gram atoms of sulfur.

Discussion

44.	Find the momentum of a body of mass100g have kinetic energy 20 j
Answer» Mass = 100g = 0.1kg K.E. = ½(m)(v²) 20 = ½(0.1)(v²) v² = 400 v = 20m/s Momentum = mv P = (0.1)(20) P = 2 kg.m/s

44.

Find the momentum of a body of mass100g have kinetic energy 20 j

Answer»

Mass = 100g = 0.1kg

K.E. = ½(m)(v²)

20 = ½(0.1)(v²)

v² = 400

v = 20m/s

Momentum = mv

P = (0.1)(20)

P = 2 kg.m/s

Discussion

45.	Calculate the work done to attain a car of velocity 30 metre per second having mass hundred kg
Answer» ACCORDING to the law of conservation of momentum, m1u1 + m2u2 = (M1 + m2)vwhere m1 = MASS of the car = 1000 kg m2= mass of the lorry = 9000 kg u1 = initial VELOCITY of the car = 30 m/s u2 = initial velocity of the lorry = 0 m/s v = velocity of the car and lorry combined together, after collision. v = (m1u1 + m2u2 )/(m1 + m2) = (1000 X 30 + 9000 x 0)/(1000 + 9000) = 30,000/10,000 = 3 m/s.

Discussion

46.	A small object is embedded in a glass sphere of refractive index =1.5of radius 5.0cm at a distance 1.5cm left to the centre .Locate the image of the object as seen by an observer standing (a)to the left of the object as seen and (b) to the right of the sphere .
Answer» The image will be formed at 2 cm and 2.65 cm left to CORNER. Explanation: (a) Image seen form left: u = ( 5 - 15) = - 3.5 cm R = - 5 cm μ2 / v - μ1 / u = μ2 - μ1 / R => 1 / v + 1.5 / 3.5 = - 1 - 1.5 / 5 => 1/v = 1/10 - 3 /7 => v = - 70/23 = - 3 cm (Inside the sphere) Image will be formed 2 cm left to corner. (b) Image seen from right: u = - ( 5 + 1.5) = - 6.5 cm R = - 5 cm μ2/v - μ1 / u = μ2 - μ1 / R 1/v + 1.5/6.5 = 1 - 1.5 / -5 => 1/v = 1/10 - 3 /13 v = - 130 / 17 = - 7.65 cm ( Inside the sphere) Image will be formed, 2.65 cm left to corner. Hence the image will be formed at 2 cm and 2.65 cm left to corner. Also learn more The image is formed at the DISTANCE of 100 cm from concave mirror of focal length 98 cm. Find the distance of object? brainly.in/question/12705350

46.

A small object is embedded in a glass sphere of refractive index =1.5of radius 5.0cm at a distance 1.5cm left to the centre .Locate the image of the object as seen by an observer standing (a)to the left of the object as seen and (b) to the right of the sphere .

Answer»

The image will be formed at 2 cm and 2.65 cm left to CORNER.

Explanation:

(a) Image seen form left:

u = ( 5 - 15) = - 3.5 cm

R = - 5 cm

μ2 / v - μ1 / u = μ2 - μ1 / R => 1 / v + 1.5 / 3.5 = - 1 - 1.5 / 5

=> 1/v = 1/10 - 3 /7 => v = - 70/23 = - 3 cm (Inside the sphere)

Image will be formed 2 cm left to corner.

(b) Image seen from right:

u = - ( 5 + 1.5) = - 6.5 cm

R = - 5 cm

μ2/v - μ1 / u = μ2 - μ1 / R

1/v + 1.5/6.5 = 1 - 1.5 / -5

=> 1/v = 1/10 - 3 /13

v = - 130 / 17 = - 7.65 cm ( Inside the sphere)

Image will be formed, 2.65 cm left to corner.

Hence the image will be formed at 2 cm and 2.65 cm left to corner.

Also learn more

The image is formed at the DISTANCE of 100 cm from concave mirror of focal length 98 cm. Find the distance of object?

brainly.in/question/12705350

Discussion

47.	work done y a body of mass 10kg to lift it through certain height is 490J .Calculate the height through which body is lifted
Answer» MGH =Joule 109.8H=490 H=5

Discussion

48.	Name two neccesary equation conditions for a body to be in equilibrium
Answer» Neccesary CONDITION for a body to be in Equilibrium are: 1.the vector SUM of FORCE on the body must be zero. 2.the vector sum of torques on the body must be zero.

Discussion

49.	Heyy frnds♡♡I m here with a question♢♧♢Write the diameters of all planets of our Solar System...☆☆Thnk uhh☆☆
Answer» Ⓗⓔⓨ ⓕⓡⓘⓔⓝⓓ ⓗⓔⓡⓔ ⓘⓢ ⓨⓞⓤⓡ ⓐⓝⓢⓦⓔⓡ ================================= $mercury = 4879km$ $venus = 12104km$ $earth = 12742km$ $mars = 6794km$ $jupiter = 13922km$ $saturn = 116464km$ $uranus = 50724km$ $neptune = 49244km$ Hope it HELPS you $prabhudutt$

Discussion

50.	Type of force and give two example of each and write fast
Answer» FORCE is of two types contact force eg FRICTIONAL force non-contact force GRAVITATIONAL force

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Determine the acceleration when t=1s if v=(4t2+2) m/s where t is in seconds

The radius of gyration of a body about an axis at a distance 4cm from its centre of mass is 5cm. Radius of gyration about a parallel axis passing through its centre of mass is

What kind of enery posses by the following (a) Flowing water (b) water stored in dam (c) wrist watch

How do you perceive an object to be in motion answer

Define light wave????? Fast plzz

I want an brief explanation of this question.

Calculate the viscous force on a ball of radius 1mm moving through a liquid of viscosity 0.2Nsmpower-1 at the speed of 0.07mspower-1.

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Define microstate and macrostate in physics .Give one example

Calculate wavelength of sound if frequency is 550 hz and speed is 440

Y light is considered to be energy... what works can light perform....

Characterstics of image formed by convex mirror

A type of flow in which viscosity increases when the substance is agitated is

A wire, 1.2mm in diameter and 32 cm long, carries a current of 648 ma. The density of free electrons in the wire is 5.90 × 1028m-3.The drift velocity of electrons in the wire is:

State the physical significances of gradient of a scalar field

A truck is moving on a frictionless surface with uniformvelocity of 10 ms–1. A leak occurs in the water tank of the truck at the rate of 2 kgs–1. What is the speed of truck after 50 s if the mass of truck is 100 kg and mass of water in the truck initially was 100 kg ?

What is stoke's law give example

What is convection?

Find speed when,distance is 142km and is 2hours

Sukha hai ak kilo gila hai hai to do kilo jalane par teen kilo

A travels at 40kmph and b travels at 60kmph. They aretraveling towards e ach other and start at the same time.By the time they meet, b would have travelled 120kmmore thana. Find the total distance.

Speed=3km/h, distance=12km what change should be done in the speed to take(1)an hour less and (2)an hour more to cover the distance

Why do we use alloys as conducting wires for electric heating appliances like bread toaster and electric iron

the radius of solid sphere R and it's density d when it is made to rotate about an axis passing through any diameter of sphere expression for its moment of inertia is

Explain in detail.......All ... questions....

Can anyone solve this question ??

A 4 kg object is slowly lowered by 1.5 m how much work is done against Gravity

A train is moving at the speed of 60 m per second at 10 o'clocka.M. At 80 m per second at 10:02 am . Assuming that the train moves along striaght track and the acceleration is constant , the value of acceleration is

A train can travel 20% faster than a bus. Both start from the point a at the same time and reach point b 75 km away from a at the same time. But the train stopped for 12.5 minutes while stopping at the stations. Find the speed of the bus in km/hr.

Can anyone help me out??

Explain in detail.........Try to answer 5 6 7 questions..

Answer is 4th option.......

An object p is moving with a constant velocity for 5 mins and a object q is moving with changing velocity for 5 mins out of these two objects which one has acceleration explain

Did you find any example od human interference in these ecosystems

An object is placed at a finite distance from a concave mirror produces an image at a distance of 20cm .If the radius of curvature is R and follow length is for give a magnification of 2 .Then determine position of object and focal length of a concave mirror .

Two blocks of masses 5 kg and 10 kg are connected by massless spring. A force of 10 N acts on 10 kg mass. At the instant 5 kg mass has an acceleration of 0.2 m/s, the acceleration of 10 kg mass would beExplain in detail..WILL be MARKED as BRAINLIAST..

Frequency of a source of sound is 250Hz.how many times does it vibrate in a minute?

A resistor of 200 ohm and a capacitor of 15micro farad are connected in series to a 220v ,50hz ac source.Calculate the current in the circuit and the rms voltage across the resistor and the capacitor.Is the algebraic sum of these voltages more than the source voltage

The temperature today is 7 degrees celsius. Yesterday it was 13 degrees celsius cooler. What was the temperature yesturday?

A train starts from a railway station and its motion is observed as follows. Find the average speed of the train in km/hr.

calculate the amount of work done to in drawing a bucket of water weighing 15 kg from a well of depth 30m

Calculate no of sulphurs and oxygen in 80g of sulphur triode

Find the momentum of a body of mass100g have kinetic energy 20 j

Calculate the work done to attain a car of velocity 30 metre per second having mass hundred kg

A small object is embedded in a glass sphere of refractive index =1.5of radius 5.0cm at a distance 1.5cm left to the centre .Locate the image of the object as seen by an observer standing (a)to the left of the object as seen and (b) to the right of the sphere .

The image will be formed at 2 cm and 2.65 cm left to CORNER.

work done y a body of mass 10kg to lift it through certain height is 490J .Calculate the height through which body is lifted

Name two neccesary equation conditions for a body to be in equilibrium

Heyy frnds♡♡I m here with a question♢♧♢Write the diameters of all planets of our Solar System...☆☆Thnk uhh☆☆

Type of force and give two example of each and write fast