67486 + Interview Questions in Secondary School in Physics

1.	Speed is a _____ quantity
Answer» ANSWER: SPEED is a VECTOR QUANTITY.

1.

Speed is a _____ quantity

Answer»

2.	A body is moving with a velocity of 10m/s. If the motion is uniform what will be its velocity after 10s.
Answer» The SPEED will stay the same because the object is moving with UNIFORM MOTION

Discussion

3.	Find the total resistance across a and b in the given circuit
Answer» Answer: Between A and B there are two 4 OHMS resistances in PARALLEL. Hence, effective resistance between A and B = 2 ohms. TOTAL resistance along ABC = 6 ohms.

3.

Find the total resistance across a and b in the given circuit

Answer»

Answer:

Between A and B there are two 4 OHMS resistances in PARALLEL. Hence, effective resistance between A and B = 2 ohms. TOTAL resistance along ABC = 6 ohms.

Discussion

4.	A 20 gram bullet moving at 300 m/s stops after penetrating 2 cm of a bone. calculate the avg force exerted by the bullet.
Answer» Given : Mass of bullet, m = 20 g = (20/1000) KG = 0.02 kg initial velocity of bullet, u = 300 m/s final velocity of bullet, v = 0 [since it comes to REST] distance covered by bullet, s = 2 cm = (2/100) m = 0.02 m To find : Average FORCE EXERTED by the bullet, F = ? Knowledge required : THIRD equation of motion 2 a s = v² - u² [ where a is acceleration, s is distance covered, v is final velocity, u is initial velocity of body ] Newton's second law of motion F = m a [ where F is force exerted by body, a is acceleration of body and m is mass of body ] Solution : Calculating acceleration of bullet Using third equation of motion → 2 a s = v² - u² → 2 a ( 0.02 ) = ( 0 )² - ( 300 )² → 0.04 a = -90000 → a = -90000/0.04 → a = -2250000 → a = - 2.25 × 10⁶ m/s² Calculating force exerted by the bullet Using Newton's second Law of motion → F = m a → F = (0.02) × (-2.25 × 10⁶ ) → F = -45000 N therefore, magnitude of the force exerted by the bullet is equal to 45000 Newton or 45 kilo Newtons.

4.

A 20 gram bullet moving at 300 m/s stops after penetrating 2 cm of a bone. calculate the avg force exerted by the bullet.

Answer»

Given :

Mass of bullet, m = 20 g = (20/1000) KG = 0.02 kg
initial velocity of bullet, u = 300 m/s
final velocity of bullet, v = 0 [since it comes to REST]
distance covered by bullet, s = 2 cm = (2/100) m = 0.02 m

To find :

Average FORCE EXERTED by the bullet, F = ?

Knowledge required :

THIRD equation of motion

2 a s = v² - u²

[ where a is acceleration, s is distance covered, v is final velocity, u is initial velocity of body ]

Newton's second law of motion

F = m a

[ where F is force exerted by body, a is acceleration of body and m is mass of body ]

Solution :

Calculating acceleration of bullet

Using third equation of motion

→ 2 a s = v² - u²

→ 2 a ( 0.02 ) = ( 0 )² - ( 300 )²

→ 0.04 a = -90000

→ a = -90000/0.04

→ a = -2250000

→ a = - 2.25 × 10⁶ m/s²

Calculating force exerted by the bullet

Using Newton's second Law of motion

→ F = m a

→ F = (0.02) × (-2.25 × 10⁶ )

→ F = -45000 N

therefore,

magnitude of the force exerted by the bullet is equal to 45000 Newton or 45 kilo Newtons.

Discussion

5.	What is the smallest electric force between two charges placed at a distance R..?
Answer» ANSWER: 500n is the CORRECT answer

5.

What is the smallest electric force between two charges placed at a distance R..?

Answer»

ANSWER:

500n is the CORRECT answer

Discussion

6.	An electric bulb draws a current of 0.8 A and works on 250 V on the average 18 hr a day . If energy costs 26 per kwh calculate monthly bill for 31 days
Answer» Answer: bbbbiiiiiiiiiiii I build up Explanation: thanks again and I LOOK for SHARING your time with the family for the holidays so I can dance class assignment for this WEEKEND but will send it as soon as I get back from my vacation days and then we will send the holidays e I can do it for sharing your time with the family for the holidays

6.

An electric bulb draws a current of 0.8 A and works on 250 V on the average 18 hr a day . If energy costs 26 per kwh calculate monthly bill for 31 days

Answer»

Answer:

bbbbiiiiiiiiiiii I build up

Explanation:

thanks again and I LOOK for SHARING your time with the family for the holidays so I can dance class assignment for this WEEKEND but will send it as soon as I get back from my vacation days and then we will send the holidays e I can do it for sharing your time with the family for the holidays

Discussion

7.	The position of an object moving along x-axis is given by x a bt = + where a m = 8.5 ,1b ms 2.5 −= and t is measured in seconds. What is its velocity att = 0 s and t s = 2.0 .
Answer» Answer: 15 m/s Explanation: Position is given as x=a+bt 2 =8.5+2.5t 2 Position at t=2 s, x 2 =8.5+2.5(2) 2 =18.5 m Position at t=4 s, x 1 =8.5+2.5(4) 2 =48.5 m Displacement S=x 2 −x 1 =48.5−18.5=30 m Time TAKEN t=4−2=2 s Average VELOCITY V avg = t S = 2 30 =15 m/s

7.

The position of an object moving along x-axis is given by x a bt = + where a m = 8.5 ,1b ms 2.5 −= and t is measured in seconds. What is its velocity att = 0 s and t s = 2.0 .

Answer»

Answer:

15 m/s

Explanation:

Position is given as x=a+bt

2

=8.5+2.5t

2

Position at t=2 s, x

2

=8.5+2.5(2)

2

=18.5 m

Position at t=4 s, x

1

=8.5+2.5(4)

2

=48.5 m

Displacement S=x

2

−x

1

=48.5−18.5=30 m

Time TAKEN t=4−2=2 s

Average VELOCITY V

avg

=

t

S

=

2

30

=15 m/s

Discussion

8.	Why we cannot use a screwdriver to remove a nail from any object?
Answer» Answer: actually we can USE the screw DRIVER to REMOVE the NAIL from any object

8.

Why we cannot use a screwdriver to remove a nail from any object?

Answer»

Answer:

actually we can USE the screw DRIVER to REMOVE the NAIL from any object

Discussion

9.	Plzz ans these my test is tomorrow 8
Answer» ANSWER: do it by MASS and GRAVITATIONAL HYPO FORMULA

9.

Plzz ans these my test is tomorrow 8

Answer»

ANSWER:

do it by MASS and GRAVITATIONAL HYPO FORMULA

Discussion

10.	Please give me some important Formulas from 'Light Reflection & Refraction' Chapter,Class 10 to solve Numericals
Answer» ANSWER: reflection-1/f = 1/v–1/u and m= h2/h1 or m= –v/u refraction-¹n⬇2=1/¹n⬇2 n=c/v sin i/sin r=n2/n1=¹n⬇2 HERE ARE THOSE IMPORTANT FORMULA YOU CAN REVISE FOR YOUR EXAMS!! ALSO REMEMBER ONE THING YOU HAVE TO KEEP IN MIND THE RELATIVE REFRACTIVE INDEX OF WATER,AIR AND GLASS!! HOPE it helps! Thank you!

10.

Please give me some important Formulas from 'Light Reflection & Refraction' Chapter,Class 10 to solve Numericals

Answer»

ANSWER:

reflection-1/f = 1/v–1/u

and m= h2/h1

or m= –v/u

refraction-¹n⬇2=1/¹n⬇2

n=c/v

sin i/sin r=n2/n1=¹n⬇2

HERE ARE THOSE IMPORTANT FORMULA YOU CAN REVISE FOR YOUR EXAMS!!

ALSO REMEMBER ONE THING YOU HAVE TO KEEP IN MIND THE RELATIVE REFRACTIVE INDEX OF WATER,AIR AND GLASS!!

HOPE it helps!

Thank you!

Discussion

11.	The ratio of the density of the substance to the density of water, which obviously has _________ units but a mere number is called as __________________ of the substance.
Answer» Answer: (a) same units (B) RELATIVE density PLZZ mark as BRAINLIEST

11.

The ratio of the density of the substance to the density of water, which obviously has _ units but a mere number is called as __________ of the substance.

Answer»

Answer:

(a) same units

(B) RELATIVE density

PLZZ mark as BRAINLIEST

Discussion

12.	The velocity of an object changes from 50m/s to 150m/sin 10 seconds what is acc
Answer» $acc = \frac{v - u}{t}$ $= \frac{150 - 50}{10}$ $= 10 \frac{m}{ {s}^{2} }$

12.

The velocity of an object changes from 50m/s to 150m/sin 10 seconds what is acc

Answer»

$acc = \frac{v - u}{t}$

$= \frac{150 - 50}{10}$

$= 10 \frac{m}{ {s}^{2} }$

Discussion

13.	Can a body have mass but no weight give reasons for your answer
Answer» ANSWER: yes Explanation: a body can have mass but still no weight. Weight W = mg, where m is the mass of the body and G the acceleration due to GRAVITY. g DEPENDS on the location and the mass of the planet. g = 0 at the centre of the EARTH and in space

13.

Can a body have mass but no weight give reasons for your answer

Answer»

ANSWER:

yes

Explanation:

a body can have mass but still no weight. Weight W = mg, where m is the mass of the body and G the acceleration due to GRAVITY. g DEPENDS on the location and the mass of the planet. g = 0 at the centre of the EARTH and in space

Discussion

14.	If u= -12,f=-4 find v
Answer» we know that:- $\tt \huge \bigstar \fbox{ \frac{1}{f} = \frac{1}{u} + \frac{1}{v}}$ Now, $\tt \huge \mapsto \: \frac{1}{v} = \frac{1}{f} - \frac{1}{u} \\ \\ \tt \huge \mapsto \:\frac{1}{v} = \frac{1}{ - 12} - \frac{1}{ - 4} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{ - 4 - ( - 12)}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{ - 4 + 12}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{8}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{1}{6} \\ \\ \tt \huge \boxed {\mapsto \:v = 6}$

14.

If u= -12,f=-4 find v

Answer»

we know that:-

$\tt \huge \bigstar \fbox{ \frac{1}{f} = \frac{1}{u} + \frac{1}{v}}$

Now,

$\tt \huge \mapsto \: \frac{1}{v} = \frac{1}{f} - \frac{1}{u} \\ \\ \tt \huge \mapsto \:\frac{1}{v} = \frac{1}{ - 12} - \frac{1}{ - 4} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{ - 4 - ( - 12)}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{ - 4 + 12}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{8}{48} \\ \\ \tt \huge \mapsto \: \frac{1}{v} = \frac{1}{6} \\ \\ \tt \huge \boxed {\mapsto \:v = 6}$

Discussion

15.	In a two dimensional motion, instantaneousspeed v is a positive constant. Then whichof the following are necessarily true?1) The average velocity is not zero at any time2) Average acceleration must always vanish.3) Displacements in equal time intervals areequal4) Equal path lengths are traversed in equalintervals
Answer» ANSWER: EQUAL path lengths are TRAVERSED in equal intervals Explanation: HOPE..

15.

In a two dimensional motion, instantaneousspeed v is a positive constant. Then whichof the following are necessarily true?1) The average velocity is not zero at any time2) Average acceleration must always vanish.3) Displacements in equal time intervals areequal4) Equal path lengths are traversed in equalintervals

Answer»

ANSWER:

EQUAL path lengths are TRAVERSED in equal intervals

Explanation:

HOPE..

Discussion

16.	Calculate the current shown by the ammeter
Answer» ANSWER: FIRST GIVE us question than only I can answer your question na??

16.

Calculate the current shown by the ammeter

Answer»

ANSWER:

FIRST GIVE us question than only I can answer your question

na??

Discussion

17.	Which of the following four statements isfalse.1) A body can have zero velocity and still beaccelerated.27A body can have a constant velocity and stillhave a varying speed.3) A body can have a constant speed and stillhave a varying velocity.4) The direction of the velocity of a body canchange when its acceleration is constant.
Answer» 2) A BODY can have a constant velocity and still have a varying speed. PLEASE MARK me as BRAINLIEST Please.......

17.

Which of the following four statements isfalse.1) A body can have zero velocity and still beaccelerated.27A body can have a constant velocity and stillhave a varying speed.3) A body can have a constant speed and stillhave a varying velocity.4) The direction of the velocity of a body canchange when its acceleration is constant.

Answer»

2) A BODY can have a constant velocity and still

have a varying speed.

PLEASE MARK me as BRAINLIEST

Please.......

Discussion

18.	•Sometimes when we touch apliance's outercase we get shock what do you think why it happens ? what precautions are taken for that?
Answer» Answer:it happens as a REFLEX action. when you touch someting HOT or SOMETHING electric your brain starts GETTING the signal and sent it to your nerves which causes you to take your hand away and be cautious. Explanation: hope this helps please mark me the branliest.

18.

•Sometimes when we touch apliance's outercase we get shock what do you think why it happens ? what precautions are taken for that?

Answer»

Answer:it happens as a REFLEX action. when you touch someting HOT or SOMETHING electric your brain starts GETTING the signal and sent it to your nerves which causes you to take your hand away and be cautious.

Explanation: hope this helps

please mark me the branliest.

Discussion

19.	If the displacement-time graph for a particle is parallel to time axis ,what is the velocity of the particle
Answer» ANSWER: zero Explanation: If DISPLACEMENT -time GRAPH for a particle is PARALLEL to time axisthen velocity must be "zero".

19.

If the displacement-time graph for a particle is parallel to time axis ,what is the velocity of the particle

Answer»

ANSWER:

zero

Explanation:

If DISPLACEMENT -time GRAPH for a particle is PARALLEL to time axisthen velocity must be "zero".

Discussion

20.	Why the resistivity of conducter increase with temperature?
Answer» Answer: When the temperature of metallic conductor increases, the VELOCITY of FREE electrons increases but it also cause increase in AMPLITUDE of vibration of metallic ATOMS which cause some extra resistance in the PATH of free electron. Hence resistance increases with increase in the temperature. HOPE IT WILL HELP U!!!

20.

Why the resistivity of conducter increase with temperature?

Answer»

Answer:

When the temperature of metallic conductor increases, the VELOCITY of FREE electrons increases but it also cause increase in AMPLITUDE of vibration of metallic ATOMS which cause some extra resistance in the PATH of free electron. Hence resistance increases with increase in the temperature.

HOPE IT WILL HELP U!!!

Discussion

21.	Plz help me a lot more
Answer» ANSWER: EQUAL or LESS than ONE 2. speedometre

21.

Plz help me a lot more

Answer»

ANSWER:

EQUAL or LESS than ONE 2. speedometre

Discussion

22.	16. Mass of B is four times that ofA B moves with a velocity halfthat of A. Then, B has(a) kinetic energy equal to that of A(b) half the kinetic energy of A(c) twice the kinetic energy of A(d) kinetic energy one-fourth of Aplease clarify this question's answer in details?????
Answer» ANSWER: option d) KINETIC ENERGY one-forth of A as it is told that mass of B is FOUR times more than A

22.

16. Mass of B is four times that ofA B moves with a velocity halfthat of A. Then, B has(a) kinetic energy equal to that of A(b) half the kinetic energy of A(c) twice the kinetic energy of A(d) kinetic energy one-fourth of Aplease clarify this question's answer in details?????

Answer»

ANSWER:

option d) KINETIC ENERGY one-forth of A

as it is told that mass of B is FOUR times more than A

Discussion

23.	Percentage error in 4±0.2
Answer» ANSWER: $\sf{The \ percentage \ error \ in \ 4\pm0.2 \ is \ 5\%.}$ GIVEN: $\sf{a\pm\Delta a=4\pm0.2}$ Formula: $\sf{Percentage \ error=\dfrac{\Delta \ a}{a}\times100}$ SOLUTION: $\sf{Percentage \ error=\dfrac{0.2}{4}\times100}$ $\sf{\therefore{Percentage \ error=0.2\times25}}$ $\sf{\therefore{Percentage \ error=5\%}}$ $\sf\purple{\tt{\therefore{The \ percentage \ error \ in \ 4\pm0.2 \ is \ 5\%.}}}$ ________________________________ $\sf\blue{Extra \ information}$ $\sf{Relation \ error=\dfrac{\Delta \ a}{a}}$ $\sf{Percentage \ error=Relative \ error\times100}$

23.

Percentage error in 4±0.2

Answer»

ANSWER:

$\sf{The \ percentage \ error \ in \ 4\pm0.2 \ is \ 5\%.}$

GIVEN:

$\sf{a\pm\Delta a=4\pm0.2}$

Formula:

$\sf{Percentage \ error=\dfrac{\Delta \ a}{a}\times100}$

SOLUTION:

$\sf{Percentage \ error=\dfrac{0.2}{4}\times100}$

$\sf{\therefore{Percentage \ error=0.2\times25}}$

$\sf{\therefore{Percentage \ error=5\%}}$

$\sf\purple{\tt{\therefore{The \ percentage \ error \ in \ 4\pm0.2 \ is \ 5\%.}}}$

________________________________

$\sf\blue{Extra \ information}$

$\sf{Relation \ error=\dfrac{\Delta \ a}{a}}$

$\sf{Percentage \ error=Relative \ error\times100}$

Discussion

24.	Find the formula for net resistance in parallel.
Answer» Answer: You can find TOTAL resistance in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +... If one of the parallel paths is broken, CURRENT will CONTINUE to FLOW in all the other paths.

24.

Find the formula for net resistance in parallel.

Answer»

Answer:

You can find TOTAL resistance in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +... If one of the parallel paths is broken, CURRENT will CONTINUE to FLOW in all the other paths.

Discussion

25.	The perticular point about whichthe position of the object isdefined, is calledtick theexact answer
Answer» ANSWER: the DEFINITION extends to any object in DIMENSIONAL SPACE

25.

The perticular point about whichthe position of the object isdefined, is calledtick theexact answer

Answer»

ANSWER:

the DEFINITION extends to any object in DIMENSIONAL SPACE

Discussion

26.	A force of 250 newton produces a moment of force of 500 Nmcalculate the movement arm
Answer» ANSWER: the MOVEMENT of ARM is 2 METRE

26.

A force of 250 newton produces a moment of force of 500 Nmcalculate the movement arm

Answer»

ANSWER:

the MOVEMENT of ARM is 2 METRE

Discussion

27.	The kinetic energy K of a particle moving along a circle of radius R depends upon distance s as K =as^2 . The force acting on the particle is?
Answer» सामिल अली की पत्नी का उनके कार्यक्षेत्र में क्या योगदान रहा ?( पाठ- सावले सपनो की याद)

27.

The kinetic energy K of a particle moving along a circle of radius R depends upon distance s as K =as^2 . The force acting on the particle is?

Answer»

सामिल अली की पत्नी का उनके कार्यक्षेत्र में क्या योगदान रहा ?( पाठ- सावले सपनो की याद)

Discussion

28.	A wooden block is dropped from top of cliff 100m high at same time a bullet fired from base of cliff and they meet each other....find height from base which they meet
Answer» Answer: 11th Physics Work, Energy and Power Collisions in Two Dimensions A WOODEN block of mass 10 g... PHYSICS A wooden block of mass 10 g is dropped from the top of a tower 100 m high. Simultaneously, a bullet of mass 10 g is fixed from the foot of the tower vertically upwards with a velocity of 100 m/s. If the bullet is embedded in it, how high will the block rise above the top of tower before it starts falling? (g=10m/s2) A 75 m B 85 m C 80 m D 10 m HARD Help best friend Study later ANSWER Given : m=10 gm =0.01kg Let the block and the bullet collides at point A after time t. For block : x=0+21gt2 x=21×10×t2 ⟹x=5t2 ............(1) For bullet : 100−x=ut−21gt2 100−x=(100)t−21×10×t2 ⟹100−x=100t−5t2 ............(2) Solving (1) and (2), we get t=1 s and x=5 m Let velocities of bullet and block just before COLLISION be VB and VW respectively. ∴ vb=u−gt v Explanation: Mark me as brainlist.

28.

A wooden block is dropped from top of cliff 100m high at same time a bullet fired from base of cliff and they meet each other....find height from base which they meet

Answer»

Answer:

11th

Physics

Work, Energy and Power

Collisions in Two Dimensions

A WOODEN block of mass 10 g...

PHYSICS

A wooden block of mass 10 g is dropped from the top of a tower 100 m high. Simultaneously, a bullet of mass 10 g is fixed from the foot of the tower vertically upwards with a velocity of 100 m/s. If the bullet is embedded in it, how high will the block rise above the top of tower before it starts falling? (g=10m/s2)

A

75 m

B

85 m

C

80 m

D

10 m

HARD

Help best friend

Study later

ANSWER

Given : m=10 gm =0.01kg

Let the block and the bullet collides at point A after time t.

For block : x=0+21gt2

x=21×10×t2 ⟹x=5t2 ............(1)

For bullet : 100−x=ut−21gt2

100−x=(100)t−21×10×t2 ⟹100−x=100t−5t2 ............(2)

Solving (1) and (2), we get t=1 s and x=5 m

Let velocities of bullet and block just before COLLISION be VB and VW respectively.

∴ vb=u−gt

v

Explanation:

Mark me as brainlist.

Discussion

29.	Mass in motion coressponds according to newton as A
Answer» Answer: please mark me as brilliant Explanation: Newton's Second Law of Motion: The mass is simply a MEASURE of the amount of MATERIAL in the object; mass is CONVENTIONALLY measured in grams or kilograms. Note that the second law IMPLIES that, for a given force, a less massive body will accelerate more than a more massive body.

29.

Mass in motion coressponds according to newton as A

Answer»

Answer:

please mark me as brilliant

Explanation:

Newton's Second Law of Motion:

The mass is simply a MEASURE of the amount of MATERIAL in the object; mass is CONVENTIONALLY measured in grams or kilograms. Note that the second law IMPLIES that, for a given force, a less massive body will accelerate more than a more massive body.

Discussion

30.	Distance,speed,time,velocityOdd man out
Answer» EXPLANATION: ODD MAN out ISS....VELOCITY

30.

Distance,speed,time,velocityOdd man out

Answer»

EXPLANATION:

ODD MAN out ISS....VELOCITY

Discussion

31.	Can anyone give me the right answer
Answer» ANSWER: bdbdndndndhdbdbndnx xnx Explanation: bdbdnsbdbdndnddnndjdndhdjdkdheiehfbdndndndmmdjdnxndnidkhddhdbbd

31.

Can anyone give me the right answer

Answer»

ANSWER:

bdbdndndndhdbdbndnx xnx

Explanation:

bdbdnsbdbdndnddnndjdndhdjdkdheiehfbdndndndmmdjdnxndnidkhddhdbbd

Discussion

32.	1 pointspeed of a body moving in a circularpath .r is the radius of the circularpath,t is time takenO2n/tt/2nrоо2u/nnone of the above
Answer» ANSWER: zvmshghmggshfshggjstjjtdzfjstsjisydky Explanation: stsgmgxkykdjtjiitjgsjsidydlhjgdhhgyijgfkdgjdjhdgdjjkcvkhklkfbvlidjfoeibdosbkdbgkdbkdbbkdbfkdbckbvkvdbvlbvblvbnldlcbdkfvkebebcmvljavsjpcbisvcjlsgxjkagxkusgicheailaxgaukgkucuslgfigapipabgohciciichflkggklhsffleahcehjlejldgglkfgkhadhlkcbaklcbllohdlabdfdcfkcnknadbkbbklchlkclcbacbvvfjfj

32.

1 pointspeed of a body moving in a circularpath .r is the radius of the circularpath,t is time takenO2n/tt/2nrоо2u/nnone of the above

Answer»

ANSWER:

zvmshghmggshfshggjstjjtdzfjstsjisydky

Explanation:

stsgmgxkykdjtjiitjgsjsidydlhjgdhhgyijgfkdgjdjhdgdjjkcvkhklkfbvlidjfoeibdosbkdbgkdbkdbbkdbfkdbckbvkvdbvlbvblvbnldlcbdkfvkebebcmvljavsjpcbisvcjlsgxjkagxkusgicheailaxgaukgkucuslgfigapipabgohciciichflkggklhsffleahcehjlejldgglkfgkhadhlkcbaklcbllohdlabdfdcfkcnknadbkbbklchlkclcbacbvvfjfj

Discussion

33.	Which appears as 'Greenish Star'?(a) Neptune(b) Saturn(c) Jupiter(d) Earth
Answer» ANSWER: NEPTUNE is RIGHT answer

33.

Which appears as 'Greenish Star'?(a) Neptune(b) Saturn(c) Jupiter(d) Earth

Answer»

ANSWER:

NEPTUNE is RIGHT answer

Discussion

34.	13. The following table gives the data about motion of a car. Time(h) 11.00 ,11.30, 12.00 ,12.30, 1.00 Distance(km) 0, 30 ,30, 60, 100 Plot the graph. (i) Find the speed of the car between 12.00 hours and 12.30 hours. (ii) What is the average speed of the car? (iii) Is the car’s motion an example of uniform motion? Justify.
Answer» EXPLANATION: i) distance/TIME 30/30 1km/ minute ii) 30+30+60+100/2 220/2 110km iii) no it's not a uniform MOTION because at the time between 12.30 and 1.00 the speed is 1.33km/h.

34.

13. The following table gives the data about motion of a car. Time(h) 11.00 ,11.30, 12.00 ,12.30, 1.00 Distance(km) 0, 30 ,30, 60, 100 Plot the graph. (i) Find the speed of the car between 12.00 hours and 12.30 hours. (ii) What is the average speed of the car? (iii) Is the car’s motion an example of uniform motion? Justify.

Answer»

EXPLANATION:

i) distance/TIME

30/30

1km/ minute

ii) 30+30+60+100/2

220/2

110km

iii) no it's not a uniform MOTION because at the time between 12.30 and 1.00 the speed is 1.33km/h.

Discussion

35.	Give this question explanation 63
Answer» ANSWER: that all 1 SEC is WRIGHT

35.

Give this question explanation 63

Answer»

ANSWER:

that all

1 SEC is WRIGHT

Discussion

36.	Which Factors affecting on the waves
Answer» ANSWER: i THINK it will HELP you

36.

Which Factors affecting on the waves

Answer»

ANSWER:

i THINK it will HELP you

Discussion

37.	17) When a body completes one revolution in a circular path of radiusthen its displacement and distancecovered are0200
Answer» Answer: 02 Explanation: As we all KNOW that displacement is the shortest distance covered by a moving body , and in this case a body revolves and REACHES the same point from where it has STARTED .

37.

17) When a body completes one revolution in a circular path of radiusthen its displacement and distancecovered are0200

Answer»

Answer:

02

Explanation:

As we all KNOW that displacement is the shortest distance covered by a moving body , and in this case a body revolves and REACHES the same point from where it has STARTED .

Discussion

38.	If a body is projected with a velocity of 10 metre per second with the maximum height of 20m finda)time of Ascentb) time of descentC) time of flight
Answer» EXPLANATION: this MAY HELP you in the SOLVING

38.

If a body is projected with a velocity of 10 metre per second with the maximum height of 20m finda)time of Ascentb) time of descentC) time of flight

Answer»

EXPLANATION:

this MAY HELP you in the SOLVING

Discussion

39.	Q2)(A)STATE WHETHER THE STATEMENTS ARE TRUEOR FALSE WITH REASON: (2)1)Human beings can digest fibres.2)Pollution is a broad concept.
Answer» Correct question :- State whether the statements are true or false. Give reason for your answer. 1) Human BEINGS can digest fibres. $\Rightarrow$ False. Reason : Human beings can't digest fibres because appropriate enzymes to digest it are LACKING in human beings. 2) POLLUTION is a broad concept. $\Rightarrow$ True. Reason : Pollution is a broad concept because it can AFFECTS many things and ANIMALS. pollution is harmful for all living organisms. Only the thing by which we can controls pollution is planting more and more plants.

39.

Q2)(A)STATE WHETHER THE STATEMENTS ARE TRUEOR FALSE WITH REASON: (2)1)Human beings can digest fibres.2)Pollution is a broad concept.

Answer»

Correct question :- State whether the statements are true or false. Give reason for your answer.

1) Human BEINGS can digest fibres.

$\Rightarrow$ False.

Reason : Human beings can't digest fibres because appropriate enzymes to digest it are LACKING in human beings.

2) POLLUTION is a broad concept.

$\Rightarrow$ True.

Reason : Pollution is a broad concept because it can AFFECTS many things and ANIMALS. pollution is harmful for all living organisms. Only the thing by which we can controls pollution is planting more and more plants.

Discussion

40.	Explain the formation of a tornado
Answer» ANSWER: Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is PUSHED over the warm air, usually producing thunderstorms. The warm air RISES through the colder air, causing an updraft. The updraft will begin to rotate if winds VARY sharply in SPEED or direction.

40.

Explain the formation of a tornado

Answer»

ANSWER:

Tornadoes form when warm, humid air collides with cold, dry air. The denser cold air is PUSHED over the warm air, usually producing thunderstorms. The warm air RISES through the colder air, causing an updraft. The updraft will begin to rotate if winds VARY sharply in SPEED or direction.

Discussion

41.	1. What do you mean by point image? Any image is the set of point images, signify this statement. If magnification is positive in case of image formed by a concave mirror then what will be the position of object? Draw a ray diagram for this situation.
Answer» ANSWER: If magnification is POSITIVE in case of image formed by a CONCAVE mirror then what will be the position of object?3 days AGO

41.

1. What do you mean by point image? Any image is the set of point images, signify this statement. If magnification is positive in case of image formed by a concave mirror then what will be the position of object? Draw a ray diagram for this situation.

Answer»

ANSWER:

If magnification is POSITIVE in case of image formed by a CONCAVE mirror then what will be the position of object?3 days AGO

Discussion

42.	I-What would be the weight of anobject of mass 60kg on the surfaceof earth? Take g=9.8m/s
Answer» ANSWER: EXPLANATION: ANS . The AMOUNT of MONEY which i have

42.

I-What would be the weight of anobject of mass 60kg on the surfaceof earth? Take g=9.8m/s

Answer»

ANSWER:

EXPLANATION:

ANS . The AMOUNT of MONEY which i have

Discussion

43.	Two objects, one 4 times as massive as the other, are approaching each other under their mutual gravitationalattraction. When the separation between the objects is 100 km, the acceleration of the lighter object is 1 m/s square.When the separation between them is 25 km, the acceleration of the heavier object is?
Answer» ANSWER: THE ANSWER IS 4 m/s^2 HOPE IT'S CLEAR FOR YOU PLZ MARK IT AS BRAINLIEST

43.

Two objects, one 4 times as massive as the other, are approaching each other under their mutual gravitationalattraction. When the separation between the objects is 100 km, the acceleration of the lighter object is 1 m/s square.When the separation between them is 25 km, the acceleration of the heavier object is?

Answer»

ANSWER:

THE ANSWER IS 4 m/s^2

HOPE IT'S CLEAR FOR YOU

PLZ MARK IT AS BRAINLIEST

Discussion

44.	13. The following table gives the data about motion of a car. Time(h) 11.00 11.30 12.00 12.30 1.00 Distance(km) 0 30 30 60 100 Plot the graph. (i) Find the speed of the car between 12.00 hours and 12.30 hours. (ii) What is the average speed of the car? (iii) Is the car’s motion an example of uniform motion? Justify.
Answer» Answer: 70km/hrs. MARKE me BRAIN LIST

44.

13. The following table gives the data about motion of a car. Time(h) 11.00 11.30 12.00 12.30 1.00 Distance(km) 0 30 30 60 100 Plot the graph. (i) Find the speed of the car between 12.00 hours and 12.30 hours. (ii) What is the average speed of the car? (iii) Is the car’s motion an example of uniform motion? Justify.

Answer»

Answer:

70km/hrs.

MARKE me BRAIN LIST

Discussion

45.	When you clasp both your palms one over other very tightly, it sticks for a while. why does this happen? Explain
Answer» Answer: may be BCOZ of AIR EXERTS PRESSURE

45.

When you clasp both your palms one over other very tightly, it sticks for a while. why does this happen? Explain

Answer»

Answer:

may be BCOZ of AIR EXERTS PRESSURE

Discussion

46.	Ginni height is measured as 142 cm what is her height in (a) metres and (b) millimetres? give step by step explanation
Answer» A) 1.42 m as 1m=100cm B)1420 MM as 1cm=10 mm

Discussion

47.	Calculate the force of attraction between two charges +4 coulumb and -4 coulumb seperated by 8×10 to the power 3 m
Answer» Answer: QUESTION: calculate the force of attraction between TWO charges +4 coulumb and -4 coulumb seperated by 8×10^3 m GIVEN: q1=4 coulomb q2=-4 coulomb r=8×10^3 m TO FIND: electrostatic force of attraction, f FORMULA: according to coulomb's law of electrostatics, f=(Kq1q2)/r^2 where, f..... electrostatic force q1 and q2 are charges k is the proportionality constant whose value is 9×10^9 C^2N^-2m^-2 r.....distance of seperation SOLUTION: $f = \frac{kq1q2}{ {r}^{2} } \\ \\ = \frac{9 \times {10}^{9} \times (4)( - 4) }{ {(8 \times {10}^{3}) }^{2} } \\ \\ = \frac{ - 144 \times {10}^{9} }{64 \times {10}^{6} } \\ \\ = - 2.25 \times {10}^{3} \\ \\ = - 2250 \: newton$ force is 2250 Newton or 2.25 kilo Newton the negative sign indicates that the force is attractive NOTE: attractive force EXIST between two oppositely CHARGED particles. repulsive force exist between two same charged PARTICLE

47.

Calculate the force of attraction between two charges +4 coulumb and -4 coulumb seperated by 8×10 to the power 3 m

Answer»

Answer:

QUESTION:

calculate the force of attraction between TWO charges +4 coulumb and -4 coulumb seperated by 8×10^3 m

GIVEN:

q1=4 coulomb
q2=-4 coulomb
r=8×10^3 m

TO FIND:

electrostatic force of attraction, f

FORMULA:

according to coulomb's law of electrostatics,

f=(Kq1q2)/r^2

where,

f..... electrostatic force
q1 and q2 are charges
k is the proportionality constant whose value is 9×10^9 C^2N^-2m^-2
r.....distance of seperation

SOLUTION:

$f = \frac{kq1q2}{ {r}^{2} } \\ \\ = \frac{9 \times {10}^{9} \times (4)( - 4) }{ {(8 \times {10}^{3}) }^{2} } \\ \\ = \frac{ - 144 \times {10}^{9} }{64 \times {10}^{6} } \\ \\ = - 2.25 \times {10}^{3} \\ \\ = - 2250 \: newton$

force is 2250 Newton or 2.25 kilo Newton

the negative sign indicates that the force is attractive

NOTE:

attractive force EXIST between two oppositely CHARGED particles.

repulsive force exist between two same charged PARTICLE

Discussion

48.	What is acceleration due to gravity
Answer» Answer: Acceleration due to gravity is the acceleration gained by an object due to the gravitational FORCE. Its SI UNIT is m/s2. It has both magnitude and DIRECTION, hence, it’s a vector quantity. Acceleration due to gravity is represented by g. The STANDARD value of g on the surface of the earth at sea level is 9.8 m/s2.

48.

What is acceleration due to gravity

Answer»

Answer:

Acceleration due to gravity is the acceleration gained by an object due to the gravitational FORCE. Its SI UNIT is m/s2. It has both magnitude and DIRECTION, hence, it’s a vector quantity. Acceleration due to gravity is represented by g. The STANDARD value of g on the surface of the earth at sea level is 9.8 m/s2.

Discussion

49.	a man completed 10km race in 1.25 hours express the time in minutes as well as in seconds give step by step explanation
Answer» here's your ANSWER MATE.

49.

a man completed 10km race in 1.25 hours express the time in minutes as well as in seconds give step by step explanation

Answer»

here's your ANSWER MATE.

Discussion

50.	What do you think what load is ? How much load you have at your home in watts?
Answer» Answer: The term "electrical load capacity" refers to the total amount of power PROVIDED by the main SERVICE for use by your home's branch circuits and the LIGHTS, outlets, and appliances connected to them. Understanding capacity and load becomes necessary if you are planning the electrical service for a new home, or if you are considering an electrical service upgrade to an older home. Understanding the load needs will let you choose an electrical service with an appropriate capacity. In older HOMES, it's extremely common for the existing service to be badly undersized for the needs of all the modern appliances and FEATURES now in use. Explanation: Please mark me as a braniliest I will definitely follow yu

50.

What do you think what load is ? How much load you have at your home in watts?

Answer»

Answer:

The term "electrical load capacity" refers to the total amount of power PROVIDED by the main SERVICE for use by your home's branch circuits and the LIGHTS, outlets, and appliances connected to them. Understanding capacity and load becomes necessary if you are planning the electrical service for a new home, or if you are considering an electrical service upgrade to an older home. Understanding the load needs will let you choose an electrical service with an appropriate capacity. In older HOMES, it's extremely common for the existing service to be badly undersized for the needs of all the modern appliances and FEATURES now in use.

Explanation:

Please mark me as a braniliest I will definitely follow yu

Discussion

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Answer:

QUESTION:

GIVEN:

TO FIND:

FORMULA:

f=(Kq1q2)/r^2

SOLUTION:

force is 2250 Newton or 2.25 kilo Newton

NOTE:

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Plzz ans these my test is tomorrow 8

Please give me some important Formulas from 'Light Reflection & Refraction' Chapter,Class 10 to solve Numericals

The ratio of the density of the substance to the density of water, which obviously has _ units but a mere number is called as __________ of the substance.

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