67486 + Interview Questions in Secondary School in Physics

1.	Hi friends ..Good Morning..Define the SI unit of potential difference.
Answer» Hello!! The SI UNIT of POTENTIAL DIFFERENCE is volt. Hope it's HELP uh .

1.

Hi friends ..Good Morning..Define the SI unit of potential difference.

Answer»

Hello!!

The SI UNIT of POTENTIAL DIFFERENCE is volt.

Hope it's HELP uh

.

Discussion

2.	When distance will be o
Answer» *DISPLACEMENT can be zero but distance cannot be zero* so *it's* *MEA* *here* *body* is in *rest* *they* r *not* *MOVE*

2.

When distance will be o

Answer»

DISPLACEMENT can be zero but distance cannot be zero

so it's MEA here

body is in rest they r not MOVE

Discussion

3.	Definea) centre of curvature (b) radius of curvature (c) pole (d)principal axis, and (e) aperture, of aSpherical mirror with the help of a labelled diagram
Answer» Answer: (1) the mid point of radius from the mirror is c/a center of CURVATURE. (2) distance from pole to object is k/a radius of curvature. (3) the mid point of mirror is k/a pole. (4) line from pole to object just like x-AXIS is c/a principle axis. (5) an aperture is a hole or an OPENING through which light travels.

3.

Definea) centre of curvature (b) radius of curvature (c) pole (d)principal axis, and (e) aperture, of aSpherical mirror with the help of a labelled diagram

Answer»

Answer:

(1) the mid point of radius from the mirror is c/a center of CURVATURE.

(2) distance from pole to object is k/a radius of curvature.

(3) the mid point of mirror is k/a pole.

(4) line from pole to object just like x-AXIS is c/a principle axis.

(5) an aperture is a hole or an OPENING through which light travels.

Discussion

4.	Pls answers Write 10 lines on simple pendulum
Answer» Answer: here's your Answer Answered by Expert Answer: (a) A SIMPLE pendulum consists of a small metal ball (called bob) suspended by a long thread from a rigid SUPPORT, such that the bob is free to SWING back and forth. The time period of a simple pendulum is the time taken by the pendulum bob to make one complete oscillation. (B) Time for 20 complete OSCILLATIONS = 36 s Time fo 1 complete oscillation = 36/20 = 1.8 s So, time period of the pendulum = 1.8 s -------"Amannn"------

4.

Pls answers Write 10 lines on simple pendulum

Answer»

Answer:

here's your Answer

Answered by Expert

Answer:

(a) A SIMPLE pendulum consists of a small metal ball (called bob) suspended by a long thread from a rigid SUPPORT, such that the bob is free to SWING back and forth.

The time period of a simple pendulum is the time taken by the pendulum bob to make one complete oscillation.

(B) Time for 20 complete OSCILLATIONS = 36 s

Time fo 1 complete oscillation = 36/20 = 1.8 s

So, time period of the pendulum = 1.8 s

-------"Amannn"------

Discussion

5.	Formula for angle between two vectors
Answer» EXPLANATION: HOPE it HELPS you and you UNDERSTAND that fourmala

5.

Formula for angle between two vectors

Answer»

EXPLANATION:

HOPE it HELPS you and you UNDERSTAND that fourmala

Discussion

6.	What is ohm and define with the example
Answer» Explanation: Ohm is a NAME of the scientist An ohm in the PHYSICS is DEFINED as the current flow in the conductor is directly proportional to potential DIFFERENCE

6.

What is ohm and define with the example

Answer»

Explanation:

Ohm is a NAME of the scientist An ohm in the PHYSICS is DEFINED as the current flow in the conductor is directly proportional to potential DIFFERENCE

Discussion

7.	when you pull your arms while catching a fast moving cricket ball, the chanceof your hand getting hurt is less. explain on the basic of newtons law of motion
Answer» Answer: When we full our ARMS backward then the TIME of interaction increases and acc. to NEWTONS law that force is inverslypropotionate to time. so more time of interaction = less hurt on arms marks it as BRAINLIEST answer.please Hope it HELPS you.

7.

when you pull your arms while catching a fast moving cricket ball, the chanceof your hand getting hurt is less. explain on the basic of newtons law of motion

Answer»

Answer:

When we full our ARMS backward then the TIME of interaction increases and acc. to NEWTONS law that force is inverslypropotionate to time. so more time of interaction = less hurt on arms

marks it as BRAINLIEST answer.please

Hope it HELPS you.

Discussion

8.	Describe a simple pendulum with the help of neat labelled diagram
Answer» ANSWER: how we can DRAW it on this APP

8.

Describe a simple pendulum with the help of neat labelled diagram

Answer»

ANSWER:

how we can DRAW it on this APP

Discussion

9.	For metacognitive functions, which will work best?A. IntrospectionB. Role playingC. ConferencingD. Inductive Reasoning
Answer» Answer: I think it is INDUCTIVE reasoning thankyou hope this is BEST for you PLZ FOLLOW me

9.

For metacognitive functions, which will work best?A. IntrospectionB. Role playingC. ConferencingD. Inductive Reasoning

Answer»

Answer:

I think it is INDUCTIVE reasoning

thankyou

hope this is BEST for you

PLZ FOLLOW me

Discussion

10.	An insect crawling up a wall crawls 5 cm upwardsin the first minute but then slides 3 cm downwardsin the next minute. It again crawls up 5 cm upwardsin the third minute but again slides 3 cmdownwards in the fourth minute. How long willthe insect take to reach a crevice in the wall at aheight of 24 cm from its starting point? How doesthe position-time graph of the insect look like?(Ans, 21 min
Answer» Dear student, ● Answer - TIME taken to reach top = 21 min ◆ Explanation - In EVERY two minutes, the insect climbs 5 cm & SLIDES 3 cm. So total PROGRESS in per two minutes is 5-3 = 2 cm. In first 20 min, the insect will CLIMB up 20/2 × 2 = 20 cm. In 21st minute, the insect will climb 5 cm, making total climbing 20+5 = 25 cm. Therefore, the insect will climb up wall of 25 cm in 21 minutes. Keep asking...

10.

An insect crawling up a wall crawls 5 cm upwardsin the first minute but then slides 3 cm downwardsin the next minute. It again crawls up 5 cm upwardsin the third minute but again slides 3 cmdownwards in the fourth minute. How long willthe insect take to reach a crevice in the wall at aheight of 24 cm from its starting point? How doesthe position-time graph of the insect look like?(Ans, 21 min

Answer»

Dear student,

● Answer -

TIME taken to reach top = 21 min

◆ Explanation -

In EVERY two minutes, the insect climbs 5 cm & SLIDES 3 cm. So total PROGRESS in per two minutes is 5-3 = 2 cm.

In first 20 min, the insect will CLIMB up 20/2 × 2 = 20 cm.

In 21st minute, the insect will climb 5 cm, making total climbing 20+5 = 25 cm.

Therefore, the insect will climb up wall of 25 cm in 21 minutes.

Keep asking...

Discussion

11.	What is the effect on resistance of metallic conductor when temperature is increased
Answer» Answer: As the TEMPERATURE of a METALLIC CONDUCTOR INCREASES, the kinetic energy of the electrons of the conductor ALSO increases ,due to which more obstruction is offered to the flowing electrons and hence the current.Therefore,as more obstruction is offered to the flowing electrons, the resistance is increased.

11.

What is the effect on resistance of metallic conductor when temperature is increased

Answer»

Answer:

As the TEMPERATURE of a METALLIC CONDUCTOR INCREASES, the kinetic energy of the electrons of the conductor ALSO increases ,due to which more obstruction is offered to the flowing electrons and hence the current.Therefore,as more obstruction is offered to the flowing electrons, the resistance is increased.

Discussion

12.	Give an example to demonstrate Newton third law of motion.
Answer» FIRING a GUN ............

Discussion

13.	A stone is dropped from the top of a tower and it strikes with 3km/hr against the ground the ground
Answer» Answer: yaar tower KI HEIGHT KITNE hai

13.

A stone is dropped from the top of a tower and it strikes with 3km/hr against the ground the ground

Answer»

Answer:

yaar tower KI HEIGHT KITNE hai

Discussion

14.	A body of mass 10kg is acted on by a force of 10 Newton for 10 second, the change in movement is?
Answer» SORRY i am EXPERT in BIO

Discussion

15.	An object travels 25 M in 5 Sec and then object travels 25 M in 3 Sec. What is theaverage speed of the object?
Answer» $\mathfrak{\large{\underline{\underline{Given:-}}}}$ In 1 st case :- Distance travelled = 25 m Time taken = 5 sec In 2 ND case :- Distance travelled = 25 m Time taken = 3 sec $\mathfrak{\large{\underline{\underline{To find:-}}}}$ Average speed of OBJECT = ? $\mathfrak{\large{\underline{\underline{Solution:-}}}}$ ★ $\boxed{\sf{Average speed = \frac{total \: distance \: travelled}{total \: time \: taken} }}$ $\implies$ $\bold{ = \frac{<klux>25</klux> + 25}{5 + 3} }$ $\implies$ $\bold{= \frac{100}{8} m /sec}$ $\implies$ $\bold{ = \frac{25}{2} m/sec}$ hence , average speed = $\ \frac{25}{2} m/sec$

15.

An object travels 25 M in 5 Sec and then object travels 25 M in 3 Sec. What is theaverage speed of the object?

Answer»

$\mathfrak{\large{\underline{\underline{Given:-}}}}$

In 1 st case :-

Distance travelled = 25 m

Time taken = 5 sec

In 2 ND case :-

Distance travelled = 25 m

Time taken = 3 sec

$\mathfrak{\large{\underline{\underline{To find:-}}}}$

Average speed of OBJECT = ?

$\mathfrak{\large{\underline{\underline{Solution:-}}}}$

★ $\boxed{\sf{Average speed = \frac{total \: distance \: travelled}{total \: time \: taken} }}$

$\implies$ $\bold{ = \frac{<klux>25</klux> + 25}{5 + 3} }$

$\implies$ $\bold{= \frac{100}{8} m /sec}$

$\implies$ $\bold{ = \frac{25}{2} m/sec}$

hence , average speed = $\ \frac{25}{2} m/sec$

Discussion

16.	Derive equation of motion both mathematically and graphically
Answer» The EQUATION of MOTION

Discussion

17.	Write difference between distance and displacement
Answer» Answer: DISTANCE : A PATH travelled by a body in the GIVEN TIME .It is expressed only by magnitude. Displacement: It IST the shortest path travelled by a body in specific direction. It is expressed in magnitude as well as direction. hope it help...

17.

Write difference between distance and displacement

Answer»

Answer:

DISTANCE :

A PATH travelled by a body in the GIVEN TIME .It is expressed only by magnitude.

Displacement:

It IST the shortest path travelled by a body in specific direction. It is expressed in magnitude as well as direction.

hope it help...

Discussion

18.	1. Which of the following is not property of electrostatic field lines?(A) Field lines start from positive charges and end at negative charges. If there is only one singlecharge, they may start or end at infinity.(B) In a charge-free region, electric field lines can be taken to be continuous curves without anybreaks.(C) Two fields lines can never cross each other(D) Lines form closed loops.
Answer» ANSWER:OPTION d is corer Explanation:d

18.

1. Which of the following is not property of electrostatic field lines?(A) Field lines start from positive charges and end at negative charges. If there is only one singlecharge, they may start or end at infinity.(B) In a charge-free region, electric field lines can be taken to be continuous curves without anybreaks.(C) Two fields lines can never cross each other(D) Lines form closed loops.

Answer»

ANSWER:OPTION d is corer

Explanation:d

Discussion

19.	Find the moment of force of 20 Newton about an axis of rotation at distance of 0.5 metre from the force
Answer» Answer:10 Nm Explanation:We know that , moment of force or TORQUE is EQUALS to the product of force applied with with the DISTANCE from the line of action of the force. Then, Force=20Newton(N) Distance=0.5meter(m) Torque=ForceDistance =200.5 =10Nm(ANS)

19.

Find the moment of force of 20 Newton about an axis of rotation at distance of 0.5 metre from the force

Answer»

Answer:10 Nm

Explanation:We know that , moment of force or TORQUE is EQUALS to the product of force applied with with the DISTANCE from the line of action of the force. Then,

Force=20Newton(N)

Distance=0.5meter(m)

Torque=Force*Distance

=20*0.5

=10Nm(ANS)

Discussion

20.	What are the Units for measuring pressure of liquids...?a. Kg m^-1 s^-2b. Nm^-2c. Pascal
Answer» Answer: Pressure is REPRESENTED by the symbol p or P. The SI UNIT for pressure is the pascal (Pa) and is equal to one NEWTON per square METER (N/m2 or kg/m.s2 ) hope it helps

20.

What are the Units for measuring pressure of liquids...?a. Kg m^-1 s^-2b. Nm^-2c. Pascal

Answer»

Answer:

Pressure is REPRESENTED by the symbol p or P. The SI UNIT for pressure is the pascal (Pa) and is equal to one NEWTON per square METER (N/m2 or kg/m.s2 )

hope it helps

Discussion

21.	Calculate speed of light in water of refractive index 4/3
Answer» MAY this help U MATE pls mark it as BRAINLIST if you like it...

Discussion

22.	A body start it's motion from rest and covered 200m in first 19second .find acceleration of the motion
Answer» Answer: S=(1/2)at^2+ut (here u=0 because the BODY is INITIALLY at rest) so ,S=(1/2)at^2 now PUTTING the value, 200=(1/2)a(19)^2 400=a(361) a=(400/361) a=1.1080m/sec^2

22.

A body start it's motion from rest and covered 200m in first 19second .find acceleration of the motion

Answer»

Answer:

S=(1/2)at^2+ut

(here u=0 because the BODY is INITIALLY at rest)

so ,S=(1/2)at^2

now PUTTING the value,

200=(1/2)a(19)^2

400=a(361)

a=(400/361)

a=1.1080m/sec^2

Discussion

23.	Car moves 75 m due to east and then 15 m due west . find its displacement ?
Answer» Answer: car MOVE 75 m in East. and move 15 m WEST then TOTAL DISPLACEMENT is 60 m

23.

Car moves 75 m due to east and then 15 m due west . find its displacement ?

Answer»

Answer:

car MOVE 75 m in East.

and move 15 m WEST

then TOTAL DISPLACEMENT is 60 m

Discussion

24.	An object is moving in a circular path of 8m what would be the distance and displacements of the object if it complete 1 full round
Answer» Answer:Distance=CIRCUMFERENCE of the circle=50.28m Displacement=0 Explanation:Distance covered by the OBJECT moving in a CIRCULAR track is the circumference of the circle =2PIEr =222/78 =50.285 Since the object returns to its initial POSITION,so displacement=0

24.

An object is moving in a circular path of 8m what would be the distance and displacements of the object if it complete 1 full round

Answer»

Answer:Distance=CIRCUMFERENCE of the circle=50.28m

Displacement=0

Explanation:Distance covered by the OBJECT moving in a CIRCULAR track is the circumference of the circle

=2*PIE*r

=2*22/7*8

=50.285

Since the object returns to its initial POSITION,so displacement=0

Discussion

25.	resistance of a 50 cm long and 0.2 mm diameter wire is 0.8 ohm resistance of another wire of different material of 75 cm length and 0.1 mm diameter is 1.5 ohm compare the specific resistance of the material
Answer» ANSWER is 3.2. okayyy

Discussion

26.	If the earth stops rotating the value of g at poles will be
Answer» $\huge\bold{HEY:)-}$ ↪FOLLOW , BRAINLIST ME☺☺PLZZ ✌✌✌✌✌✌✌✌✌ Acceleration due to GRAVITY will increase. As the EARTH is rotating about itself, all objects and people are going around in a circle EVERY day. In order to move in a circle like that there is a force required. Thus some part of the gravitational force makes us go around in that circle. The REMAINING force is equal to the APPARENT or observed weight of an object on the surface of earth. So apparent weight is less than true weight. If Earth is not rotating about itself, then all the gravitational force of attraction is equal to the weight. Hence the apparent weight is same as true weight.

26.

If the earth stops rotating the value of g at poles will be

Answer»

$\huge\bold{HEY:)-}$

↪FOLLOW , BRAINLIST ME☺☺PLZZ

✌✌✌✌✌✌✌✌✌

Acceleration due to GRAVITY will increase.

As the EARTH is rotating about itself, all objects and people are going around in a circle EVERY day. In order to move in a circle like that there is a force required. Thus some part of the gravitational force makes us go around in that circle. The REMAINING force is equal to the APPARENT or observed weight of an object on the surface of earth. So apparent weight is less than true weight.

If Earth is not rotating about itself, then all the gravitational force of attraction is equal to the weight. Hence the apparent weight is same as true weight.

Discussion

27.	1 bigha is equal to how many square feet in madhya pradesh
Answer» 1 BIGHA is EQUALS to 17,424 SQUARE FEETS

Discussion

28.	(b)(c)Ans.(a) This graph shows that with increase in time distance first increases and then decreases. However, distancecan never decrease with time, so this graph is not possible.(0) This graph shows that at a certain time to the body is present at two positions. It also shows that tirst umeincreases and then decreases. Since both these conditions cannot be realised in practice, hence this graph isnot possible.(C) This graph shows that speed is negative for some interval of time. Since speed cannot be negative, this graphis also not possible.(a) This graph shows that at a given instant of time the particle has two velocities. Also, it shows that at some timeit has infinite acceleration (graph parallel to the velocity axis). Both these conditions cannot be achieved inpractice; therefore, this graph is also not possible.s Problems- QUESTIONS1. What are scalars ? Give an example.2. What are vectors ? Give an example.3. What is meant by rest?4. What is meant by motion?5. Give SI unit of distance and displacement.6. Give SI unit of speed and velocity.7. A particle completes motion along a circular path in a certain time. What will be its displacement?8. Give an example of non-uniform motion.9. Under what condition does the average velocity become equal to the instantaneous velocity?10. Can the equations of motion be used in a situation where acceleration varies with time? Can they be used when acceleration is zero?11 A honey bee leaves the hive and travels 2 km before returning. Is the displacement for the trip same as the distance travelled? If not,
Answer» Answer: 10 Q.N SEARCH on Google Q.N11 solution, Displacement: Displacement is only depends upon the initial and final STATE of OBJECT .it is a VECTOR quantity. DISTANCE: It is only depends upon the path Flow by the object so path Flowed 2km which is distance but no displacement.

28.

(b)(c)Ans.(a) This graph shows that with increase in time distance first increases and then decreases. However, distancecan never decrease with time, so this graph is not possible.(0) This graph shows that at a certain time to the body is present at two positions. It also shows that tirst umeincreases and then decreases. Since both these conditions cannot be realised in practice, hence this graph isnot possible.(C) This graph shows that speed is negative for some interval of time. Since speed cannot be negative, this graphis also not possible.(a) This graph shows that at a given instant of time the particle has two velocities. Also, it shows that at some timeit has infinite acceleration (graph parallel to the velocity axis). Both these conditions cannot be achieved inpractice; therefore, this graph is also not possible.s Problems- QUESTIONS1. What are scalars ? Give an example.2. What are vectors ? Give an example.3. What is meant by rest?4. What is meant by motion?5. Give SI unit of distance and displacement.6. Give SI unit of speed and velocity.7. A particle completes motion along a circular path in a certain time. What will be its displacement?8. Give an example of non-uniform motion.9. Under what condition does the average velocity become equal to the instantaneous velocity?10. Can the equations of motion be used in a situation where acceleration varies with time? Can they be used when acceleration is zero?11 A honey bee leaves the hive and travels 2 km before returning. Is the displacement for the trip same as the distance travelled? If not,

Answer»

Answer:

10 Q.N SEARCH on Google

Q.N11

solution,

Displacement: Displacement is only depends upon the initial and final STATE of OBJECT .it is a VECTOR quantity.

DISTANCE: It is only depends upon the path Flow by the object

so path Flowed 2km which is distance but no displacement.

Discussion

29.	Moment of inertia of a thin rod of mass M and length L about an axis perpendicular to it andpassing through mid-point is ML2/12. Moment of inertia of this road about an axis perpendicularto it and passing through the end shall be :(A) ML2/12(B) ML2/16(C) ML2/3(D) ML2/2
Answer» ANSWER: moment of inertia PASSING through MID point is ml2/12 M.I. through END is ml2/12 + ml2/4 = ml2/3 hope it helps.

29.

Moment of inertia of a thin rod of mass M and length L about an axis perpendicular to it andpassing through mid-point is ML2/12. Moment of inertia of this road about an axis perpendicularto it and passing through the end shall be :(A) ML2/12(B) ML2/16(C) ML2/3(D) ML2/2

Answer»

ANSWER:

moment of inertia PASSING through MID point is ml2/12

M.I. through END is

ml2/12 + ml2/4 = ml2/3

hope it helps.

Discussion

30.	Write an activity for liquid pressure.
Answer» Aim: to PROVE LIQUID exerts PRESSURE Materials required: a glass test tube with OPEN end, balloon,water Procedure: tie a balloon to the lower end of the test tube hold the tube vertically and pour some water into it. you will see the rubber membrane bulges out. now add more water the rubber membrane bulges more. Conclusion: so this concludes that pressure EXERTED by a liquid increases with the height of the liquid column.

30.

Write an activity for liquid pressure.

Answer»

Aim: to PROVE LIQUID exerts PRESSURE

Materials required: a glass test tube with OPEN end, balloon,water

Procedure: tie a balloon to the lower end of the test tube hold the tube vertically and pour some water into it. you will see the rubber membrane bulges out. now add more water

the rubber membrane bulges more.

Conclusion: so this concludes that pressure EXERTED by a liquid increases with the height of the liquid column.

Discussion

31.	Q.1. 3x 1017 C electrons cross in 30 seconds through anarea. What is the electric current ?Anc-1017
Answer» EXPLANATION: ELECTRIC CURRENT is 101.7

31.

Q.1. 3x 1017 C electrons cross in 30 seconds through anarea. What is the electric current ?Anc-1017

Answer»

EXPLANATION:

ELECTRIC CURRENT is 101.7

Discussion

32.	মাহৈগণ??) ওO w Madry Ryne Ergey Megফা। rিeyকােঠগগে?০৩2 cuদৈ204 209
Answer» Don't POST LIKE this QUESTION

Discussion

33.	EIND THE EDIVALENT CAPACITANCE BETWEEN
Answer» WELCOME to the concept of WHEAT stone bridge.... yr ANSWER is 45/6 if answer not help you REPORT it...

33.

EIND THE EDIVALENT CAPACITANCE BETWEEN

Answer»

WELCOME to the concept of WHEAT stone bridge....

yr ANSWER is 45/6

if answer not help you REPORT it...

Discussion

34.	Definition of uniform acceleration speeds
Answer» Explanation: if an object SPEED (VELOCITY) is INCREASING at a constant rate then we say it as uniform ACCELERATION .the rate of acceleration is constant

34.

Definition of uniform acceleration speeds

Answer»

Explanation:

if an object SPEED (VELOCITY) is INCREASING at a constant rate then we say it as uniform ACCELERATION .the rate of acceleration is constant

Discussion

35.	Boiling water reactor and pressurized water reactor is ??
Answer» ANSWER: Buchiglass PRESSURE REACTOR

35.

Boiling water reactor and pressurized water reactor is ??

Answer»

ANSWER:

Buchiglass PRESSURE REACTOR

Discussion

36.	10. Which of the following does not represent a wave (stationary or travelling)?(A) y = 2./x-vt(B) y = 2 cos (3x) sin (101)(C) y = 3 sin (5x - 0.5t) + 4 cos (5x - 0.51)(D) y = cos x sin t + cos 2x sin 2t.
Answer» ANSWER: option B not denotes as a wave because it is function of only of X where as Theta not must be a constant value STANDARD wave equation is y = ASIN(WT)

36.

10. Which of the following does not represent a wave (stationary or travelling)?(A) y = 2./x-vt(B) y = 2 cos (3x) sin (101)(C) y = 3 sin (5x - 0.5t) + 4 cos (5x - 0.51)(D) y = cos x sin t + cos 2x sin 2t.

Answer»

ANSWER:

option B not denotes as a wave because it is function of only of X where as Theta not must be a constant value STANDARD wave equation is y = ASIN(WT)

Discussion

37.	A bullet of mass 50.0 g is fired with a speed of 200 m/s. After passing through a thin woodenwall, the bullet loses 80% of its initial kinetic energy. What is the emergent speed of the bullet?(A) 40 2 m/s(B) 40 3 m/s(C) 40 15 m/s(D) 40 vio m/s.[P.T.C743/3,500/T77/10107
Answer» Answer: D) 40 vio m/s Explanation: because the SPEED will GET LESS

37.

A bullet of mass 50.0 g is fired with a speed of 200 m/s. After passing through a thin woodenwall, the bullet loses 80% of its initial kinetic energy. What is the emergent speed of the bullet?(A) 40 2 m/s(B) 40 3 m/s(C) 40 15 m/s(D) 40 vio m/s.[P.T.C743/3,500/T77/10107

Answer»

Answer:

D) 40 vio m/s

Explanation:

because the SPEED will GET LESS

Discussion

38.	An astronaut is on the surface of a planet whose air resistance is negligible. To measure the acc due to gravity he throws a stone upwards. He observes that stone reaches to a max height of 10 m and reaches the surface 4 s after it was thrown. Find acc due to gravity
Answer» Answer: 5 m/s^2 Explanation: T = 2u/g 4 = 2u/g 4g = 2u u = 2G.....(1) H = u^2/2g 10 = (2g)^2/2g.....From (1) 10 = 2g g = 5 m/ s^2

38.

An astronaut is on the surface of a planet whose air resistance is negligible. To measure the acc due to gravity he throws a stone upwards. He observes that stone reaches to a max height of 10 m and reaches the surface 4 s after it was thrown. Find acc due to gravity

Answer»

Answer:

5 m/s^2

Explanation:

T = 2u/g

4 = 2u/g

4g = 2u

u = 2G.....(1)

H = u^2/2g

10 = (2g)^2/2g.....From (1)

10 = 2g

g = 5 m/ s^2

Discussion

39.	Concentrated saline will flow faster or water?
Answer» ANSWER: no if it FLOWS faster than water than it will get diffused EASILY in the ATMOSPHERE.

39.

Concentrated saline will flow faster or water?

Answer»

ANSWER:

no if it FLOWS faster than water than it will get diffused EASILY in the ATMOSPHERE.

Discussion

40.	Find out retardation is the brakes of cars going speed 50 metre per hour and attend rest after moving 25 metre of distance
Answer» ANSWER: a=? u=50 m/hr =0.0138m/s s=25m v=0 we KNOW, v^2=u^2+2as 0=(0.0138)^2+2a25 1.9210^-4+50a=0 50a=-1.9210^-4 a=-1.9210^-4/50 a=-3.8510^-6 m/s a=0.0138m/hr ans. I HOPE this SOLUTION is HELPFUL..

40.

Find out retardation is the brakes of cars going speed 50 metre per hour and attend rest after moving 25 metre of distance

Answer»

ANSWER:

a=?

u=50 m/hr

=0.0138m/s

s=25m

v=0

we KNOW,

v^2=u^2+2as

0=(0.0138)^2+2*a*25

1.92*10^-4+50a=0

50a=-1.92*10^-4

a=-1.92*10^-4/50

a=-3.85*10^-6 m/s

a=0.0138m/hr ans.

I HOPE this SOLUTION is HELPFUL..

Discussion

41.	Why mirror are transparent as they are also solids like metal
Answer» Answer: MIRROR are not TRANSPARENT but glasses are transparent Explanation: GLASS doesn't absorb the light photon of visual photones LIKE so they are transparent or no coloured

41.

Why mirror are transparent as they are also solids like metal

Answer»

Answer:

MIRROR are not TRANSPARENT but glasses are transparent

Explanation:

GLASS doesn't absorb the light photon of visual photones LIKE so they are transparent or no coloured

Discussion

42.	Define energy band gap ❌ No unwanted answers needed❌
Answer» Answer: In solid state PHYSICS a band gap ALSO called an ENERGY gap or bandgap is an energy range a solid where no ELECTRONS can exist

42.

Define energy band gap ❌ No unwanted answers needed❌

Answer»

Answer:

In solid state PHYSICS a band gap ALSO called an ENERGY gap or bandgap is an energy range a solid where no ELECTRONS can exist

Discussion

43.	Good morning guys ...lets see who can solve it
Answer» Answer: answer is 2m/s Explanation: because the velocity and SPEED of BALL x will TRANSFER to ball y

43.

Good morning guys ...lets see who can solve it

Answer»

Answer:

answer is 2m/s

Explanation:

because the velocity and SPEED of BALL x will TRANSFER to ball y

Discussion

44.	10 useful example of atmospheric pressure
Answer» ANSWER: Birthday BALLOONS blowing. Flushing toilets. Air pressure for CAR and bicycle. Giving a car wash with pressure HOSE. Taking a shower. Drinking juices with straw. Sprinkler hose to WATER the lawns.

44.

10 useful example of atmospheric pressure

Answer»

ANSWER:

Birthday BALLOONS blowing.

Flushing toilets.

Air pressure for CAR and bicycle.

Giving a car wash with pressure HOSE.

Taking a shower.

Drinking juices with straw.

Sprinkler hose to WATER the lawns.

Discussion

45.	Hello ✌️✔️Give the properties of beta decay and gamma decay ✔️❌No unwanted answers ❌
Answer» heya!! ____________________⭐⭐⭐ ß -decay → when neutron is in excess. ß+. *decay* → when proton is in excess ¥ *decay* → *just like ATOM nucleus also* *posses* *DIFFERENT energy levels after* emission of alpha, *beta particles nucleus also* *occupies its excited state and when comes BACK to the ground state it emits,* ¥ *photon. NOTE* :- gamma emission FOLLOWS alpha and ß emission but there is no single nucleus which emits alpha and ß simultaneously. [ Refer to attachment ] hope it helps!! #PhoeniX

45.

Hello ✌️✔️Give the properties of beta decay and gamma decay ✔️❌No unwanted answers ❌

Answer»

heya!!

____________________⭐⭐⭐

ß -decay

→ when neutron is in excess.

ß+. decay

→ when proton is in excess

¥ decay

→ just like ATOM nucleus also posses DIFFERENT energy levels after emission of alpha, beta particles nucleus also occupies its excited state and when comes BACK to the ground state it emits, ¥ photon.

NOTE :- gamma emission FOLLOWS alpha and ß emission but there is no single nucleus which emits alpha and ß simultaneously.

[ Refer to attachment ]

hope it helps!!

#PhoeniX

Discussion

46.	Please provide me last year big bang edge test for class 9 and class 5
Answer» ANSWER: ●●●●heya mate from next time when you ASK a QUESTION plz mention the BOARD to. ●●●●

46.

Please provide me last year big bang edge test for class 9 and class 5

Answer»

ANSWER:

●●●●heya mate from next time when you ASK a QUESTION plz mention the BOARD to. ●●●●

Discussion

47.	➡️ Give the properties of alpha decay ❌ no spamming ❌❌
Answer» *PROPERTIES* of *ALPHA* *Rays* Check out the given attachment ❤

47.

➡️ Give the properties of alpha decay ❌ no spamming ❌❌

Answer»

PROPERTIES of ALPHA Rays

Check out the given attachment ❤

Discussion

48.	S13. Resistance of a 50 cm long and 0.2 mm diameter wire is0.822. Resistance of another wire of different material of75 cm length and 0.1 mm diameter is 1.512. Compare the- 2*specific resistance of the materials.
Answer» ANSWER: (RHO)/(rho)' = 4.932/1.512 Explanation: R=(rho)L/A ..........(i) R'=(rho)'L'/A'...........(II) DIVIDE (i)/(ii) and calculate RATION of (rho)/(rho)' [A=(pi)d^2 / 4 ]

48.

S13. Resistance of a 50 cm long and 0.2 mm diameter wire is0.822. Resistance of another wire of different material of75 cm length and 0.1 mm diameter is 1.512. Compare the- 2*specific resistance of the materials.

Answer»

ANSWER:

(RHO)/(rho)' = 4.932/1.512

Explanation:

R=(rho)L/A ..........(i)

R'=(rho)'L'/A'...........(II)

DIVIDE (i)/(ii) and calculate RATION of (rho)/(rho)' [A=(pi)d^2 / 4 ]

Discussion

49.	A boy is wearing a shirt of mass 150 g. How much force is he exerting on the dress? Do not forget tostate the direction.
Answer» $\huge\bold{HEY:)-}$ ⭐⭐⭐⭐⭐⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ❤❤❤⭐⭐⭐⭐ $\\ \\ \\ \\ \\$ ⤵⤵⤵⤵ FOLLOW , BRAINLIST ME☺☺PLZZ =========== m=150 G= 150/1000 KG =3/20 kg ↪ only gravitational force will exert Force = mg 3/20 ×10= 3/2 =1.5 N

49.

A boy is wearing a shirt of mass 150 g. How much force is he exerting on the dress? Do not forget tostate the direction.

Answer»

$\huge\bold{HEY:)-}$

⭐⭐⭐⭐⭐⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ❤❤❤⭐⭐⭐⭐ $\\ \\ \\ \\ \\$

⤵⤵⤵⤵

FOLLOW , BRAINLIST ME☺☺PLZZ

===========

m=150 G= 150/1000 KG =3/20 kg

↪ only gravitational force will exert

Force = mg

3/20 ×10= 3/2 =1.5 N

Discussion

50.	For work to be performed energy must be ?
Answer» Answer: yes Explanation: ENERGY is NECESSARY to be PERFORMING any work. Because for every LIVING things energy is very important.

50.

For work to be performed energy must be ?

Answer»

Answer:

yes

Explanation:

ENERGY is NECESSARY to be PERFORMING any work. Because for every LIVING things energy is very important.

Discussion

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