67486 + Interview Questions in Secondary School in Physics

1.	Heya mates! Gimme proof and statement of Converse of Pythagoras theorem! ^^"
Answer» $\huge\underline\mathfrak\red{Statement}$ In a triangle, if the square of one SIDE is equal to the sum of square of other two sides then prove that the triangle is right angled triangle. ________________________ $\huge\underline\mathfrak\red{Solution}$ Given : AC² = AB² + BC² To prove : ABC is a right angled triangle. Construction : Draw a right angled triangle PQR such that, ANGLE Q = 90°, AB = PQ, BC = QR. Proof : In triangle PQR, Angle Q = 90° ( by construction ) Also, PR² = PQ² + QR² ( By using Pythagoras theorem )...(1) But, AC² = AB² + BC² ( Given ) Also, AB = PQ and BC = QR ( by construction ) Therefore, AC² = PQ²+ QR²....(2) From eq (1) and (2), PR² = AC² So, PR = AC Now, In ∆ABC and ∆PQR, AB = PQ ( By construction ) BC = QR ( By construction ) AC = PR ( Proved above ) Hence, ∆ABC is congruent to ∆PQR by SSS criteria. Therefore, Angle B = Angle Q ( By CPCT ) But, Angle Q = 90° ( By construction ) Therefore, Angle B = 90° Thus, ABC is a right angled triangle with Angle B = 90° ____________________ Hence proved!

1.

Heya mates! Gimme proof and statement of Converse of Pythagoras theorem! ^^"

Answer»

$\huge\underline\mathfrak\red{Statement}$

In a triangle, if the square of one SIDE is equal to the sum of square of other two sides then prove that the triangle is right angled triangle.

________________________

$\huge\underline\mathfrak\red{Solution}$

Given : AC² = AB² + BC²

To prove : ABC is a right angled triangle.

Construction : Draw a right angled triangle PQR such that, ANGLE Q = 90°, AB = PQ, BC = QR.

Proof : In triangle PQR,

Angle Q = 90° ( by construction )

Also,

PR² = PQ² + QR² ( By using Pythagoras theorem )...(1)

But,

AC² = AB² + BC² ( Given )

Also, AB = PQ and BC = QR ( by construction )

Therefore,

AC² = PQ²+ QR²....(2)

From eq (1) and (2),

PR² = AC²

So, PR = AC

Now,

In ∆ABC and ∆PQR,

AB = PQ ( By construction )

BC = QR ( By construction )

AC = PR ( Proved above )

Hence,

∆ABC is congruent to ∆PQR by SSS criteria.

Therefore, Angle B = Angle Q ( By CPCT )

But,

Angle Q = 90° ( By construction )

Therefore,

Angle B = 90°

Thus, ABC is a right angled triangle with Angle B = 90°

____________________

Hence proved!

Discussion

2.	a car accelerates no uniformly over a path of time .Do equations of motion hold true in this case ? why or why not ?
Answer» ♣️*Heya* *Mate♣️ it cannot be DONE as acceleration is NON uniform* *over* *PATH of time. it is VALID only for uniform motion because acceleration is CONSTANT and it only* *moves in a regular* *path*.

2.

a car accelerates no uniformly over a path of time .Do equations of motion hold true in this case ? why or why not ?

Answer»

♣️Heya Mate♣️

it cannot be DONE as acceleration is NON uniform over PATH of time. it is VALID only for uniform motion because acceleration is CONSTANT and it only moves in a regular path.

Discussion

3.	A body is thrown vertically upwards. what happens to its kinetic energy at its highest point?
Answer» ANSWER: at the HIGH point kinetic energy become zero and it CONVERTS to POTENTIAL energy Explanation:

3.

A body is thrown vertically upwards. what happens to its kinetic energy at its highest point?

Answer»

ANSWER:

at the HIGH point kinetic energy become zero and it CONVERTS to POTENTIAL energy

Explanation:

Discussion

4.	A simple pendulum is carrying a Bob of mass M it is pulled through an angle 45 degree from its mean position the horizontal force required to keep it under equilibrium at this new position is
Answer» Answer: The horizontal force REQUIRED to keep the bob in EQUILIBRIUM is Mg Explanation: Let the horizontal force required to keep it in equilibrium is F If the tension in the STRING is T then resolving T into two components and balancing TEH forces In the VERTICAL direction $T\sin45^\circ=Mg$ $\implies \frac{T}{\sqrt{2}}=Mg$ $\implies T=Mg\sqrt{2}$ In the horizontal direction $T\cos45^\circ=F$ $\implies Mg\sqrt{2}\times \frac{1}{\sqrt{2}}=F$ $\implies F=Mg$ Thus, the horizontal force required to keep the bob in equilibrium is Mg Hope this helps.

4.

A simple pendulum is carrying a Bob of mass M it is pulled through an angle 45 degree from its mean position the horizontal force required to keep it under equilibrium at this new position is

Answer»

Answer:

The horizontal force REQUIRED to keep the bob in EQUILIBRIUM is Mg

Explanation:

Let the horizontal force required to keep it in equilibrium is F

If the tension in the STRING is T then resolving T into two components and balancing TEH forces

In the VERTICAL direction

$T\sin45^\circ=Mg$

$\implies \frac{T}{\sqrt{2}}=Mg$

$\implies T=Mg\sqrt{2}$

In the horizontal direction

$T\cos45^\circ=F$

$\implies Mg\sqrt{2}\times \frac{1}{\sqrt{2}}=F$

$\implies F=Mg$

Thus, the horizontal force required to keep the bob in equilibrium is Mg

Hope this helps.

Discussion

5.	Who is the prime minister of uk
Answer» EXPLANATION: ALEXANDER Boris de Pfeffel Johnson is a BRITISH politician, serving as Prime Minister of the United Kingdom and Leader of the Conservative Party since JULY 2019. He has been MEMBER of Parliament for Uxbridge and South Ruislip since 2015 and was previously MP for Henley from 2001 to 2008.

5.

Who is the prime minister of uk

Answer»

EXPLANATION:

ALEXANDER Boris de Pfeffel Johnson is a BRITISH politician, serving as Prime Minister of the United Kingdom and Leader of the Conservative Party since JULY 2019. He has been MEMBER of Parliament for Uxbridge and South Ruislip since 2015 and was previously MP for Henley from 2001 to 2008.

Discussion

6.	International state or city level
Answer» ANSWER: MAYBE your QUESTION lacks some INFORMATION about the question which U have to post... kindly send full question...

6.

International state or city level

Answer»

ANSWER:

MAYBE your QUESTION lacks some INFORMATION about the question which U have to post...

kindly send full question...

Discussion

7.	What are the factors on which material dispersion depend upon?
Answer» Answer: the factor on which MATERIAL DISPERSION depend UPON first is uneven surface second is ZIGZAG surface

7.

What are the factors on which material dispersion depend upon?

Answer»

Answer:

the factor on which MATERIAL DISPERSION depend UPON first is uneven surface second is ZIGZAG surface

Discussion

8.	Prove the converse of Pythagoras theorem with statement!
Answer» $\huge\underline\mathfrak\red{Statement}$ In a triangle, if the square of ONE side is equal to the sum of square of other two SIDES then prove that the triangle is RIGHT angled triangle. ________________________ $\huge\underline\mathfrak\red{Solution}$ Given : AC² = AB² + BC² To prove : ABC is a right angled triangle. CONSTRUCTION : Draw a right angled triangle PQR such that, angle Q = 90°, AB = PQ, BC = QR. Proof : In triangle PQR, Angle Q = 90° ( by construction ) Also, PR² = PQ² + QR² ( By using Pythagoras theorem )...(1) But, AC² = AB² + BC² ( Given ) Also, AB = PQ and BC = QR ( by construction ) Therefore, AC² = PQ²+ QR²....(2) From eq (1) and (2), PR² = AC² So, PR = AC Now, In ∆ABC and ∆PQR, AB = PQ ( By construction ) BC = QR ( By construction ) AC = PR ( Proved above ) Hence, ∆ABC is congruent to ∆PQR by SSS criteria. Therefore, Angle B = Angle Q ( By CPCT ) But, Angle Q = 90° ( By construction ) Therefore, Angle B = 90° Thus, ABC is a right angled triangle with Angle B = 90° ____________________ Hence proved!

8.

Prove the converse of Pythagoras theorem with statement!

Answer»

$\huge\underline\mathfrak\red{Statement}$

In a triangle, if the square of ONE side is equal to the sum of square of other two SIDES then prove that the triangle is RIGHT angled triangle.

________________________

$\huge\underline\mathfrak\red{Solution}$

Given : AC² = AB² + BC²

To prove : ABC is a right angled triangle.

CONSTRUCTION : Draw a right angled triangle PQR such that, angle Q = 90°, AB = PQ, BC = QR.

Proof : In triangle PQR,

Angle Q = 90° ( by construction )

Also,

PR² = PQ² + QR² ( By using Pythagoras theorem )...(1)

But,

AC² = AB² + BC² ( Given )

Also, AB = PQ and BC = QR ( by construction )

Therefore,

AC² = PQ²+ QR²....(2)

From eq (1) and (2),

PR² = AC²

So, PR = AC

Now,

In ∆ABC and ∆PQR,

AB = PQ ( By construction )

BC = QR ( By construction )

AC = PR ( Proved above )

Hence,

∆ABC is congruent to ∆PQR by SSS criteria.

Therefore, Angle B = Angle Q ( By CPCT )

But,

Angle Q = 90° ( By construction )

Therefore,

Angle B = 90°

Thus, ABC is a right angled triangle with Angle B = 90°

____________________

Hence proved!

Discussion

9.	D) At what Temborature the acelcius and Fahrenheitscale of a thermometer indicate the same reading a) 40°C(b) – 40°C (6) 100°C (d) 0°c
Answer» ANSWER: OPTION B -40 is CORRECT

9.

D) At what Temborature the acelcius and Fahrenheitscale of a thermometer indicate the same reading a) 40°C(b) – 40°C (6) 100°C (d) 0°c

Answer»

ANSWER:

OPTION B -40 is CORRECT

Discussion

10.	All India Aakash Test Series for NEET-201938. The potential energy of a particle of mass 2 kgmoving along the x-axis is given by U(x) = 4x2 - 2x(where U is in joules and x is in meters). The kineticenergy of the particle is maximum at(1) x = 0(2) x = 1 m(3) x = = m(4) x = 2 m.
Answer» ANSWER: niiceee.... .... but not that TOUGH

10.

All India Aakash Test Series for NEET-201938. The potential energy of a particle of mass 2 kgmoving along the x-axis is given by U(x) = 4x2 - 2x(where U is in joules and x is in meters). The kineticenergy of the particle is maximum at(1) x = 0(2) x = 1 m(3) x = = m(4) x = 2 m.

Answer»

ANSWER:

niiceee....

....

but not that TOUGH

Discussion

11.	What is Kinematics ?? Explain .
Answer» Answer: Kinematics is a branch of classical MECHANICS that describes the motion of points, bodies, and systems of bodies without considering the forces that cause them to move. Kinematics, as a FIELD of study, is OFTEN referred to as the "geometry of motion" and is occasionally SEEN as a branch of MATHEMATICS. ❤hope it will help u❤

11.

What is Kinematics ?? Explain .

Answer»

Answer:

Kinematics is a branch of classical MECHANICS that describes the motion of points, bodies, and systems of bodies without considering the forces that cause them to move. Kinematics, as a FIELD of study, is OFTEN referred to as the "geometry of motion" and is occasionally SEEN as a branch of MATHEMATICS.

❤hope it will help u❤

Discussion

12.	The mass of Sun is 2 x 1030 kg and mass of Earth is 6 x 1024 kg. If the distance between the ceSun and Earth is 1.5 x 108 km, calculate the force of gravitation between them.Given G = 6.7 x 10
Answer» ANSWER: FORCE of GRAVITY =9.8 Hope it will HELP uu

12.

The mass of Sun is 2 x 1030 kg and mass of Earth is 6 x 1024 kg. If the distance between the ceSun and Earth is 1.5 x 108 km, calculate the force of gravitation between them.Given G = 6.7 x 10

Answer»

ANSWER:

FORCE of GRAVITY =9.8

Hope it will HELP uu

Discussion

13.	A fixed wire ab carries current I an electron is moving parallel to the wire in which direction does the electron tend to move
Answer» ANSWER: The DIRECTION of CURRENT and electronic is OPPOSITE so the electron move opposite to the direction of current

13.

A fixed wire ab carries current I an electron is moving parallel to the wire in which direction does the electron tend to move

Answer»

ANSWER:

The DIRECTION of CURRENT and electronic is OPPOSITE so the electron move opposite to the direction of current

Discussion

14.	Why does dispersion of light occur only in prism why not in vacuum?
Answer» Explanation: Because the prism reflects in from so MANY directions so it DESPERTION takes place And in vaccum there is no reflective THING or substance so it doesn't despertion TAKE place . kindly *Mark* my *answer* as *brainlist. And* *also* *like* it. *Thanks*

14.

Why does dispersion of light occur only in prism why not in vacuum?

Answer»

Explanation:

Because the prism reflects in from so MANY directions so it DESPERTION takes place

And in vaccum there is no reflective THING or substance

so it doesn't despertion TAKE place .

kindly

Mark my answer as brainlist.

And also like it.

Thanks

Discussion

15.	Under what condition the value of distance and displacement is same in magnitude
Answer» ANSWER: when the OBJECT is MOVING in a STRAIGHT LINE.

15.

Under what condition the value of distance and displacement is same in magnitude

Answer»

ANSWER:

when the OBJECT is MOVING in a STRAIGHT LINE.

Discussion

16.	Identify the kind of motion in the following graph
Answer» ▪HEY DEAR▪ Looks like u FORGOT to ATTACH the graph.. ;) No issues,just retype it with the graph attached❗ ✌May u GET BETTER in studies✌

16.

Identify the kind of motion in the following graph

Answer»

▪HEY DEAR▪

Looks like u FORGOT to ATTACH the graph..

;)

No issues,just retype it with the graph attached❗

✌May u GET BETTER in studies✌

Discussion

17.	Temperature of 14°F is equivalent to296 b)263 K c)250 K d) 1.5°C
Answer» Answer:250K Explanation:

17.

Temperature of 14°F is equivalent to296 b)263 K c)250 K d) 1.5°C

Answer»

Answer:250K

Explanation:

Discussion

18.	Find the amount of charge contain 6 electrons
Answer» 6 TIMES the CHARGE of an electron =6×1.6×10^-19 =9.6×10^-19C

18.

Find the amount of charge contain 6 electrons

Answer»

6 TIMES the CHARGE of an electron

=6×1.6×10^-19

=9.6×10^-19C

Discussion

19.	What is reference point I didn’t understand
Answer» ANSWER: A reference point in PHYSICS is a point in space, regardless of the type of geometry that you are using that stays still and does not move. A fixed point with respect to which a BODY CHANGES its position is CALLED referance point or origin.

19.

What is reference point I didn’t understand

Answer»

ANSWER:

A reference point in PHYSICS is a point in space, regardless of the type of geometry that you are using that stays still and does not move. A fixed point with respect to which a BODY CHANGES its position is CALLED referance point or origin.

Discussion

20.	Star A is farther than star B which star will have a large parallar angle?
Answer» ANSWER: STAR A LARGE parallar ANGLE

20.

Star A is farther than star B which star will have a large parallar angle?

Answer»

ANSWER:

STAR A LARGE parallar ANGLE

Discussion

21.	A dog and a horse running at a same speed, who has more kinetic energy and why?
Answer» Answer: ❤️❤️If a dog and HORSE are running with the same speed, kinetic energy of horse is more than the kinetic energy of the dog because the mass of a horse is more than the dog. So, more the mas more the kinetic energy is.❤️❤️ Explanation: ❤️❤️hello DEAR here is your answer MARK it brainlist OK and follow me... :) ☺️☺️❤️❤️

21.

A dog and a horse running at a same speed, who has more kinetic energy and why?

Answer»

Answer:

❤️❤️If a dog and HORSE are running with the same speed, kinetic energy of horse is more than the kinetic energy of the dog because the mass of a horse is more than the dog. So, more the mas more the kinetic energy is.❤️❤️

Explanation:

❤️❤️hello DEAR here is your answer MARK it brainlist OK and follow me... :) ☺️☺️❤️❤️

Discussion

22.	Hello! Proof of Converse of Pythagoras theorem? And statement?
Answer» $\huge\underline\mathscr{Statement}$ In a triangle, if the square of one side is equal to the sum of square of other two SIDES then PROVE that the triangle is right angled triangle. ________________________ $\huge\underline\mathscr{Solution}$ Given : AC² = AB² + BC² To prove : ABC is a right angled triangle. Construction : Draw a right angled triangle PQR such that, angle Q = 90°, AB = PQ, BC = QR. Proof : In triangle PQR, Angle Q = 90° ( by construction ) Also, PR² = PQ² + QR² ( By using Pythagoras theorem )...(1) But, AC² = AB² + BC² ( Given ) Also, AB = PQ and BC = QR ( by construction ) Therefore, AC² = PQ²+ QR²....(2) From eq (1) and (2), PR² = AC² So, PR = AC Now, In ∆ABC and ∆PQR, AB = PQ ( By construction ) BC = QR ( By construction ) AC = PR ( Proved above ) Hence, ∆ABC is congruent to ∆PQR by SSS criteria. Therefore, Angle B = Angle Q ( By CPCT ) But, Angle Q = 90° ( By construction ) Therefore, Angle B = 90° Thus, ABC is a right angled triangle with Angle B = 90° ____________________ Hence proved!

22.

Hello! Proof of Converse of Pythagoras theorem? And statement?

Answer»

$\huge\underline\mathscr{Statement}$

In a triangle, if the square of one side is equal to the sum of square of other two SIDES then PROVE that the triangle is right angled triangle.

________________________

$\huge\underline\mathscr{Solution}$

Given : AC² = AB² + BC²

To prove : ABC is a right angled triangle.

Construction : Draw a right angled triangle PQR such that, angle Q = 90°, AB = PQ, BC = QR.

Proof : In triangle PQR,

Angle Q = 90° ( by construction )

Also,

PR² = PQ² + QR² ( By using Pythagoras theorem )...(1)

But,

AC² = AB² + BC² ( Given )

Also, AB = PQ and BC = QR ( by construction )

Therefore,

AC² = PQ²+ QR²....(2)

From eq (1) and (2),

PR² = AC²

So, PR = AC

Now,

In ∆ABC and ∆PQR,

AB = PQ ( By construction )

BC = QR ( By construction )

AC = PR ( Proved above )

Hence,

∆ABC is congruent to ∆PQR by SSS criteria.

Therefore, Angle B = Angle Q ( By CPCT )

But,

Angle Q = 90° ( By construction )

Therefore,

Angle B = 90°

Thus, ABC is a right angled triangle with Angle B = 90°

____________________

Hence proved!

Discussion

23.	Time (t) in seconds 0,2,4,6,8,10Displacement ($) in metres 0,8,16,16,8,0(i) Sketch a displacement -time graph for this motion.(ii) Sketch a distance-time graph for the same motion.(iii) For which time intervals the body possesses(a) Uniform retardation(b) Constant velocity(iv)What will be the displacement of the body at(a) t = 35(b) t = 75(iv) Give one example of this kind of motion in everyday life situations.
Answer» ANSWER: I don't UNDERSTAND the QUESTION

23.

Time (t) in seconds 0,2,4,6,8,10Displacement ($) in metres 0,8,16,16,8,0(i) Sketch a displacement -time graph for this motion.(ii) Sketch a distance-time graph for the same motion.(iii) For which time intervals the body possesses(a) Uniform retardation(b) Constant velocity(iv)What will be the displacement of the body at(a) t = 35(b) t = 75(iv) Give one example of this kind of motion in everyday life situations.

Answer»

ANSWER:

I don't UNDERSTAND the QUESTION

Discussion

24.	(velocity of electromagnet wave in vacuumisa) 3x10,10 m/s (b) 3x10,9 m/s (c) 3x10,8 m/s (d) 3x10,11 m/s
Answer» Answer: 3×10 RAISE to POWER 8m/s

24.

(velocity of electromagnet wave in vacuumisa) 3x10,10 m/s (b) 3x10,9 m/s (c) 3x10,8 m/s (d) 3x10,11 m/s

Answer»

Answer:

3×10 RAISE to POWER 8m/s

Discussion

25.	A magnet is near a close conductor the current may be produced in the conductor if
Answer» ANSWER: there is a FORCE of ATTRACTION between MAGNET and CONDUCTOR

25.

A magnet is near a close conductor the current may be produced in the conductor if

Answer»

ANSWER:

there is a FORCE of ATTRACTION between MAGNET and CONDUCTOR

Discussion

26.	Is time travel possible?
Answer» Answer: Not yet. Explanation: SCIENTISTS are GIVING their possible TIME to KNOW more and more about time travelence but yet it is not PROVED scientifically.

26.

Is time travel possible?

Answer»

Answer:

Not yet.

Explanation:

SCIENTISTS are GIVING their possible TIME to KNOW more and more about time travelence but yet it is not PROVED scientifically.

Discussion

27.	197 The masses of three copper wires are in the ratio 1:3 : 5 and their lengths are in theratio 5:3 : 1. The ratio of their resistance is[MH-CET 2014)1) 25:1: 125 2) 1:125:25 3) 125: 1:25 4) 125:25: 1
Answer» HOPEFULLY it HELPED U...

27.

197 The masses of three copper wires are in the ratio 1:3 : 5 and their lengths are in theratio 5:3 : 1. The ratio of their resistance is[MH-CET 2014)1) 25:1: 125 2) 1:125:25 3) 125: 1:25 4) 125:25: 1

Answer»

HOPEFULLY it HELPED U...

Discussion

28.	What is the si unit of magnetic strength
Answer» TESLA ......... HOPE it HELPS

28.

What is the si unit of magnetic strength

Answer»

TESLA

.........

HOPE it HELPS

Discussion

29.	Draw a schematic diagram of a circuit consisting of a battery of 12V,threeresistors of 5 ohm,10 ohm and 20 ohm connected in parallel,an ammeter to measure the total currentthrough the circuit,voltmeter to measure the potential difference across thecombination of resistors.
Answer» MAY be! I don't KNOW EXACTLY.

29.

Draw a schematic diagram of a circuit consisting of a battery of 12V,threeresistors of 5 ohm,10 ohm and 20 ohm connected in parallel,an ammeter to measure the total currentthrough the circuit,voltmeter to measure the potential difference across thecombination of resistors.

Answer»

MAY be! I don't KNOW EXACTLY.

Discussion

30.	Two balls of equal masses are thrown upwards along the same vertical direction at an interval of 2 second ,with same initial velocity of 45 m/s then find at what height balls will collide
Answer» t1= 45/10=4.5sec t2=2.5 at instant of 4.5 sec 1st ball lis at Hmax = and SECOND ball is at 81.25m so now the DISTANCE bw them is 60m and they are under GRAVITY so grelative= v at that instant =U-gt=45-25=20m/s h(distance between BALLS)= u(ball b with respect to ball a)t 60=(ub+ua)t 60=(20+0)+t t=3sec H=1/2g3² H= 45 m

30.

Two balls of equal masses are thrown upwards along the same vertical direction at an interval of 2 second ,with same initial velocity of 45 m/s then find at what height balls will collide

Answer»

t1= 45/10=4.5sec t2=2.5

at instant of 4.5 sec 1st ball lis at Hmax =

and SECOND ball is at

81.25m

so now the DISTANCE bw them is 60m

and they are under GRAVITY so

grelative=

v at that instant =U-gt=45-25=20m/s

h(distance between BALLS)= u(ball b with respect to ball a)*t

60=(ub+ua)*t

60=(20+0)+t

t=3sec

H=1/2g3²

H= 45 m

Discussion

31.	Examples of How to calculate torque of couple
Answer» PRODUCT of manigitude of FORCE and their DISTANCE of separation direction = CROSS product of distance with force

31.

Examples of How to calculate torque of couple

Answer»

PRODUCT of manigitude of FORCE and their DISTANCE of separation

direction = CROSS product of distance with force

Discussion

32.	Calculate the force of gravitation btw the earth and the sun give that mass of earth 6×10 ki power 24kg and of the sun 2×10ki power30 kg the average distance btw the two is 1.5×10 ki power11m
Answer» Answer: Explanation: GIVEN:--- M1 = Mass of the Sun = 2 × 10^30 kg M2 = Mass of the Earth = 6 × 10^24 kg R = Average distance between the Earth and the Sun = 1.5 × 10^11 m G = 6.7 × 10^−11 Nm^2 kg^−2 According to the universal LAW of gravitational , F = G× M1 × M2/ r^2 (Put the values of all quantities, we get) =6.7×10^−11×2×10^30×6×10^24/(1.5×10^11)^2 = 3.57 × 10^22 N Hence, the force of gravitation between the Earth and the Sun is 3.57 × 10^22 N Read more on Brainly.in - brainly.in/question/5696196#readmore

32.

Calculate the force of gravitation btw the earth and the sun give that mass of earth 6×10 ki power 24kg and of the sun 2×10ki power30 kg the average distance btw the two is 1.5×10 ki power11m

Answer»

Answer:

Explanation:

GIVEN:---

M1 = Mass of the Sun = 2 × 10^30 kg

M2 = Mass of the Earth = 6 × 10^24 kg

R = Average distance between the Earth and the Sun = 1.5 × 10^11 m

G = 6.7 × 10^−11 Nm^2 kg^−2

According to the universal LAW of gravitational ,

F = G× M1 × M2/ r^2

(Put the values of all quantities, we get)

=6.7×10^−11×2×10^30×6×10^24/(1.5×10^11)^2

= 3.57 × 10^22 N

Hence, the force of gravitation between the Earth and the Sun is

3.57 × 10^22 N

Read more on Brainly.in - brainly.in/question/5696196#readmore

Discussion

33.	Partical is thrown vertically upward with initial velocity u distance covered by particle in 3u/2g sec is?
Answer» EXPLANATION: speed=dist/time u=dist/3u/2g 3u^2/2g=dist

33.

Partical is thrown vertically upward with initial velocity u distance covered by particle in 3u/2g sec is?

Answer»

EXPLANATION:

speed=dist/time

u=dist/3u/2g

3u^2/2g=dist

Discussion

34.	A particle moving along X-axis has acceleration f,at time t, given f =where f, and T arewconstants. The particle at t = 0 has zero velocity.When f = 0, the particle's velocity (Vx) is[AIPMT (Prelims)-2007]
Answer» Instantaneous VELOCITY at the instant when t = 0, a = ao(1 - t/T), When a = 0, t = T, a = ao(1 - t/T), DV/DT = ao(1 - t/T), dv = ao(1 - t/T) dt, INTEGRATE, v = ao(t - t²/(2T)), When t = T (i.e when a = 0), v = ao(T - T²/(2T)), v = ao(T/2). Therefore, velocity at the instant when a = 0 is = ao(T/2)

34.

A particle moving along X-axis has acceleration f,at time t, given f =where f, and T arewconstants. The particle at t = 0 has zero velocity.When f = 0, the particle's velocity (Vx) is[AIPMT (Prelims)-2007]

Answer»

Instantaneous VELOCITY at the instant when t = 0, a = ao(1 - t/T), When a = 0, t = T, a = ao(1 - t/T), DV/DT = ao(1 - t/T), dv = ao(1 - t/T) dt,

INTEGRATE, v = ao(t - t²/(2T)), When t = T (i.e when a = 0), v = ao(T - T²/(2T)), v = ao(T/2). Therefore, velocity at the instant when a = 0 is = ao(T/2)

Discussion

35.	Pleasepleaseplease Answer any 10 questions
Answer» Answer: 35.Momentum before firing = 0 Momentum after firing = mv + MV According to law of conservation of momentum, mv + MV = 0 Recoil velocity V = - mv /M 37.by universal law of gravitation , maua + mbub = MAVA + mbvb lets take m , v , u of shell as ma , va , ua lets take m , v , u of GUN as mb , vb , ub ma = 0.02kg mb = 100kg ua = ub = 0 (starts from rest) va = 80 m/s vb = ? maua + mbub = mava + mbvb (0.020) + (1000) = (0.0280) + (100vb) 0 = 1.6 + 100vb -1.6 = 100vb -1.6/100 = vb -0.016 m/s is the recoil velocity of the gun.

35.

Pleasepleaseplease Answer any 10 questions

Answer»

Answer:

35.Momentum before firing = 0

Momentum after firing = mv + MV

According to law of conservation of momentum,

mv + MV = 0

Recoil velocity V = - mv /M

37.by universal law of gravitation , maua + mbub = MAVA + mbvb

lets take m , v , u of shell as ma , va , ua

lets take m , v , u of GUN as mb , vb , ub

ma = 0.02kg

mb = 100kg

ua = ub = 0 (starts from rest)

va = 80 m/s

vb = ?

maua + mbub = mava + mbvb

(0.02*0) + (100*0) = (0.02*80) + (100*vb)

0 = 1.6 + 100vb

-1.6 = 100vb

-1.6/100 = vb

-0.016 m/s is the recoil velocity of the gun.

Discussion

36.	A train of length 600m is travelliong with a velocity of 64 km/hr.The time taken by the train to cross clearly a bridge of 1km will be ?
Answer» Answer: 30to 35 SEC and it's is no BIG but which STD you STDY

36.

A train of length 600m is travelliong with a velocity of 64 km/hr.The time taken by the train to cross clearly a bridge of 1km will be ?

Answer»

Answer:

30to 35 SEC

and it's is no BIG but which STD you STDY

Discussion

37.	How is music produced in wind instruments
Answer» Answer: In reed INSTRUMENTS the sounds or vibrations are MADE when the air TRAVELS across a thin piece of wood called a reed. The reed vibrates MAKING the sound. Some instruments have one reed, like the clarinet and the saxophone. Other instruments use two reeds to vibrate against each other, like the OBOE and the bassoon. Explanation: make me as brainaliest

37.

How is music produced in wind instruments

Answer»

Answer:

In reed INSTRUMENTS the sounds or vibrations are MADE when the air TRAVELS across a thin piece of wood called a reed. The reed vibrates MAKING the sound. Some instruments have one reed, like the clarinet and the saxophone. Other instruments use two reeds to vibrate against each other, like the OBOE and the bassoon.

Explanation:

make me as brainaliest

Discussion

38.	(P.)বিদ্যালয় শিক্ষা দপ্তর(a) which element is formed when dead nitrateis strongly heated?(a) H₂ (6) O2 (C) NO₂ (d) Pbo.
Answer» ANSWER: When heated, lead(II) nitrate crystals DECOMPOSE to lead(II) OXIDE, OXYGEN and nitrogen DIOXIDE.

38.

(P.)বিদ্যালয় শিক্ষা দপ্তর(a) which element is formed when dead nitrateis strongly heated?(a) H₂ (6) O2 (C) NO₂ (d) Pbo.

Answer»

ANSWER:

When heated, lead(II) nitrate crystals DECOMPOSE to lead(II) OXIDE, OXYGEN and nitrogen DIOXIDE.

Discussion

39.	What is the force if distance between the object is tripled
Answer» ANSWER: F2=F/9 Explanation: F is inversely proportional to square of DISTANCE ==>F1/F2=(D2/D1)^2 F1=F ; F2=? ; D1=D ; D2=3D ==>F/F2=3D X 3D/D x D F/F2=9 F2=F/9

39.

What is the force if distance between the object is tripled

Answer»

ANSWER:

F2=F/9

Explanation:

F is inversely proportional to square of DISTANCE

==>F1/F2=(D2/D1)^2

F1=F ; F2=? ; D1=D ; D2=3D

==>F/F2=3D X 3D/D x D

F/F2=9

F2=F/9

Discussion

40.	In a vernier callipers 20 vernier division are equal to 19 main scale division and each main scale division is 1mm the least count of vernier callipers is
Answer» the LEAST COUNT is 0.05 MM

Discussion

41.	The maximum focal length of convex lens is
Answer» ANSWER: For a converging lens, blue light converges FASTER. So the LONGEST focal length will be with RED light. ... So, the MAXIMUM focal length will be for the red light. HOPE IT HELPS :)

41.

The maximum focal length of convex lens is

Answer»

ANSWER:

For a converging lens, blue light converges FASTER. So the LONGEST focal length will be with RED light. ... So, the MAXIMUM focal length will be for the red light.

HOPE IT HELPS :)

Discussion

42.	A stone is dropped from a height of 122.2m . The distance travelled by it in the last one second of motion will be ??
Answer» S=A/2(24-1) S= 75=35m

42.

A stone is dropped from a height of 122.2m . The distance travelled by it in the last one second of motion will be ??

Answer»

S=A/2(2*4-1)

S= 7*5=35m

Discussion

43.	Derive an expression for energy stored by an elastic spring
Answer» Answer: Explanation: WAIT i am DERIVING but i am not getting SURELY i will SEND

43.

Derive an expression for energy stored by an elastic spring

Answer»

Answer:

Explanation:

WAIT i am DERIVING but i am not getting SURELY i will SEND

Discussion

44.	Propagation of sound in air
Answer» ANSWER: Transmission of ACOUSTIC energy through a medium on a sound WAVES

44.

Propagation of sound in air

Answer»

ANSWER:

Transmission of ACOUSTIC energy through a medium on a sound WAVES

Discussion

45.	How are vibratory and oscillatory motion different from periodic motion
Answer» Answer: Vibratory motion: it can be described as any object moving/SWINGING back and forth, moving up and down, pulsating, spinning, or vibrating. swinging; pendulums, swings, metronomes are the example of vibratory motion. Oscillatory motion: it can be TERMED as the repeated motion in which an object repeats the same movement over and over. Periodic motion: when motion is repeated in equal INTERVALS of TIME, Periodic motion is performed. HOPE IT HELPS :)

45.

How are vibratory and oscillatory motion different from periodic motion

Answer»

Answer:

Vibratory motion: it can be described as any object moving/SWINGING back and forth, moving up and down, pulsating, spinning, or vibrating. swinging; pendulums, swings, metronomes are the example of vibratory motion.

Oscillatory motion: it can be TERMED as the repeated motion in which an object repeats the same movement over and over.

Periodic motion: when motion is repeated in equal INTERVALS of TIME, Periodic motion is performed.

HOPE IT HELPS :)

Discussion

46.	The answer for the freely falling body under the action of conservative force alone . The total mechanical energy of the body remain constant. How
Answer» BONJOUR MATE❗❗❗ U left ur question INCOMPLETE...but no worries,it happens Just RETYPE it and do complete it so that V can answer it #Be brainly✌ ▶KEEP ON ASKING QUESTIONS◀

46.

The answer for the freely falling body under the action of conservative force alone . The total mechanical energy of the body remain constant. How

Answer»

BONJOUR MATE❗❗❗

U left ur question INCOMPLETE...but no worries,it happens

Just RETYPE it and do complete it so that V can answer it

#Be brainly✌

▶KEEP ON ASKING QUESTIONS◀

Discussion

47.	An object is placed on an inclined plane just starts
Answer» HEY THERE! BRO,U left ur question incomplete. Retype it with further INFO and complete it so that V can help UH out. ❗SMILE PLZ❗

47.

An object is placed on an inclined plane just starts

Answer»

HEY THERE!

BRO,U left ur question incomplete.

Retype it with further INFO and complete it so that V can help UH out.

❗SMILE PLZ❗

Discussion

48.	Shown in the figure are the position time graph for two children going home from the school. Which of the following statements about their relative motion is true after both of them started moving? Their relative velocity : (consider 1-D motion)
Answer» YO BUDDY! WHY DO EVERY ONE LEAVE THEIR QUESTIONS INCOMPLETE?? Pls retype ur question with proper info. so that v can HELP uh somehow. G'NIGHT! #SMILE

48.

Shown in the figure are the position time graph for two children going home from the school. Which of the following statements about their relative motion is true after both of them started moving? Their relative velocity : (consider 1-D motion)

Answer»

YO BUDDY!

WHY DO EVERY ONE LEAVE THEIR QUESTIONS INCOMPLETE??

Pls retype ur question with proper info. so that v can HELP uh somehow.

G'NIGHT!

#SMILE

Discussion

49.	One thousand micron is equal to
Answer» Answer: 1 μ (MICRON) = ${10}^{ - 6} metres$ 1000 μ = $1000 \times {10}^{ - 6} metres$ $= {10}^{3} \times {10}^{ - 6} \\ = {10}^{ - 6 + 3} \\ = {10}^{ - 3} metres$

49.

One thousand micron is equal to

Answer»

Answer:

1 μ (MICRON) =

${10}^{ - 6} metres$

1000 μ =

$1000 \times {10}^{ - 6} metres$

$= {10}^{3} \times {10}^{ - 6} \\ = {10}^{ - 6 + 3} \\ = {10}^{ - 3} metres$

Discussion

50.	Precaution of labrotory thermeter
Answer» The precautions of LABORATORY thermometer are :- The thermometer should be kept UPRIGHT not tilted. Bulb should be SURROUNDED from all SIDES by the substance for which the temperature must be measured. The bulb should not touch the SURFACE of the container

50.

Precaution of labrotory thermeter

Answer»

The precautions of LABORATORY thermometer are :-

The thermometer should be kept UPRIGHT not tilted.
Bulb should be SURROUNDED from all SIDES by the substance for which the temperature must be measured.
The bulb should not touch the SURFACE of the container

Discussion

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