50278 + Interview Questions in Physics

1.	How to calculate the solid angle of a surface which is not perpendicular to the central line which passes through the centre of the angle .... It was something like. [ cos^2(thita)/radius squared]. Is this correct or if not then what's the formula
Answer» How to calculate the solid angle of a surface which is not perpendicular to the central line which passes through the centre of the angle .... It was something like. [ cos^2(thita)/radius squared]. Is this correct or if not then what's the formula

Discussion

2.	A car start moving along a line , first with accl= 2,startin s from rest then uniformly and decelerating at the same rate and comes to rest . The total time of motion is 10s . The average speed during the time is 3.2"m/s.How long does the car moved uniformly?
Answer» A car start moving along a line , first with accl= 2,startin s from rest then uniformly and decelerating at the same rate and comes to rest . The total time of motion is 10s . The average speed during the time is 3.2"m/s.How long does the car moved uniformly?

Discussion

3.	Two bodies A and B are arranged as shown in figure. Which of the following options is correct regarding body A?
Answer» Two bodies $A$ and $B$ are arranged as shown in figure. Which of the following options is correct regarding body $A$ ?

Discussion

4.	If mass of A=10 kg , coefficient of static friction= 0.2, coefficient of kinetic friction = 0.2. The mass of B is 20 kg. Find acceleration of masses
Answer» If mass of $A = 10 kg$ , coefficient of static friction= $0.2$ , coefficient of kinetic friction = $0.2$ . The mass of $B$ is $20 kg$ . Find acceleration of masses

Discussion

5.	A wire of magnetic dipole moment M and L is bent into shape of a semicircle of raduis r. What will be its new dipole moment?
Answer» A wire of magnetic dipole moment M and L is bent into shape of a semicircle of raduis r. What will be its new dipole moment?

Discussion

6.	A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will
Answer» A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will

Discussion

7.	Two blocks of mass 2 kg and 4 kg are kept in contact with each other on a smooth horizontal surface. A horizontal force of 12 N is applied on the first block due to which they move with certain constant acceleration. Calculate the force between the blocks.
Answer» Two blocks of mass 2 kg and 4 kg are kept in contact with each other on a smooth horizontal surface. A horizontal force of 12 N is applied on the first block due to which they move with certain constant acceleration. Calculate the force between the blocks.

Discussion

8.	If the separation between the two eyes of a man is d, what should be the minimum width of the mirror in which the man could see the full image of his face of width w, using both of his eyes.
Answer» If the separation between the two eyes of a man is d, what should be the minimum width of the mirror in which the man could see the full image of his face of width w, using both of his eyes.

Discussion

9.	Which of the following has the highest energy?
Answer» Which of the following has the highest energy?

Discussion

10.	Rate of emission of a black body at 546∘ C is E. Then the rate of emission of radiation of body at 0∘ C will be
Answer» Rate of emission of a black body at $546^{\circ} C$ is $E$ . Then the rate of emission of radiation of body at $0^{\circ} C$ will be

Discussion

11.	In the given figure, what is the work done by the spring force?
Answer» In the given figure, what is the work done by the spring force?

11.

In the given figure, what is the work done by the spring force?

Answer»

In the given figure, what is the work done by the spring force?

Discussion

12.	A proton and an electron are both travelling at the same speed. What can we conclude about their de Broglie wavelengths?
Answer» A proton and an electron are both travelling at the same speed. What can we conclude about their de Broglie wavelengths?

Discussion

13.	A bar magnet when placed at an angle of 30∘ to the direction of magnetic field induction of 5×10−2 T, experiences a moment of couple 25×10−6 N−m. If the length of the magnet is 5 cm its pole strength is
Answer» A bar magnet when placed at an angle of $30^{\circ}$ to the direction of magnetic field induction of $5 \times 10^{- 2} T$ , experiences a moment of couple $25 \times 10^{- 6} N - m$ . If the length of the magnet is 5 cm its pole strength is

Discussion

14.	The mean radius of the earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be
Answer» The mean radius of the earth is R, its angular speed on its own axis is $ω$ and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be

Discussion

15.	In a vessel, a radioactive material A is placed at t=0, which disintegrates into B and B further disintegrates into C. In another vessel a radioactive material D at (t=0,D is zero) is produced at a constant rate, which disintegrates into E. Column -I shows variation of quantity with time whereas Column-II gives variations of A,B,C and D. Match the following
Answer» In a vessel, a radioactive material $A$ is placed at $t = 0$ , which disintegrates into $B$ and $B$ further disintegrates into $C$ . In another vessel a radioactive material $D$ at ( $t = 0, D$ is zero) is produced at a constant rate, which disintegrates into $E$ . Column -I shows variation of quantity with time whereas Column-II gives variations of $A, B, C$ and $D$ . Match the following

Discussion

16.	Given that 0.2ˆi+0.6ˆj+aˆk is a unit vector. What is the value of a?
Answer» Given that $0.2 ˆ i + 0.6 ˆ j + a ˆ k$ is a unit vector. What is the value of a?

Discussion

17.	A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is
Answer» A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is

17.

A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is

Answer»

A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is

Discussion

18.	Earthing or grounding means
Answer» Earthing or grounding means

Discussion

19.

Find the nature of the graph of the following quadratic equation in terms of which side it will open. I. y = x2 − 8x a. open upward II. y = −2x2 + 3 b. open downward III. y = x2 − 6x + 4 c. open right d. open left

Answer»

Find the nature of the graph of the following quadratic equation in terms of which side it will open.

I. $y = x^{2} - 8 x$	a. open upward
II. $y = - 2 x^{2} + 3$	b. open downward
III. $y = x^{2} - 6 x + 4$	c. open right
	d. open left

Discussion

20.	A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector →a is correctly shown in
Answer» A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector $\to a$ is correctly shown in

Discussion

21.	A shell initially at rest explodes into two pieces of equal mass, then the two pieces will
Answer» A shell initially at rest explodes into two pieces of equal mass, then the two pieces will

21.

A shell initially at rest explodes into two pieces of equal mass, then the two pieces will

Answer»

A shell initially at rest explodes into two pieces of equal mass, then the two pieces will

Discussion

22.	Two particles of equal masses are revolving in circular paths of radii r1 and r2 respectively with the same speed. The ratio of their centripetal forces is
Answer» Two particles of equal masses are revolving in circular paths of radii $r_{1}$ and $r_{2}$ respectively with the same speed. The ratio of their centripetal forces is

Discussion

23.	Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in the same duration of time t. The ratio of the angular speed of the first to the second car is
Answer» Two racing cars of masses $m_{1} a n d m_{2}$ are moving in circles of radii $r_{1} a n d r_{2}$ respectively. Their speeds are such that each makes a complete circle in the same duration of time t. The ratio of the angular speed of the first to the second car is

Discussion

24.	A 30kg hammer strikes a steel spike (nail) 2.30 cm in diameter while moving with speed 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110s. The average strain in the spike during the impact will be (Y=2×1011N/m2)
Answer» A 30kg hammer strikes a steel spike (nail) 2.30 cm in diameter while moving with speed 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110s. The average strain in the spike during the impact will be ( $Y = 2 \times 10^{11} N / m^{2}$ )

24.

A 30kg hammer strikes a steel spike (nail) 2.30 cm in diameter while moving with speed 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110s. The average strain in the spike during the impact will be (Y=2×1011N/m2)

Answer»

A 30kg hammer strikes a steel spike (nail) 2.30 cm in diameter while moving with speed 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110s. The average strain in the spike during the impact will be

( $Y = 2 \times 10^{11} N / m^{2}$ )

Discussion

25.	A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produces oscillations of frequency f. If L is doubled and C is changed to 4C, the frequency will be
Answer» A transistor-oscillator using a resonant circuit with an inductor $L$ (of negligible resistance) and a capacitor $C$ in series produces oscillations of frequency $f$ . If $L$ is doubled and $C$ is changed to $4 C$ , the frequency will be

Discussion

26.	A drop of oil is placed on the surface of water. Which of the following statement is correct
Answer» A drop of oil is placed on the surface of water. Which of the following statement is correct

26.

A drop of oil is placed on the surface of water. Which of the following statement is correct

Answer»

A drop of oil is placed on the surface of water. Which of the following statement is correct

Discussion

27.	For an ideal gas of diatomic molecules
Answer» For an ideal gas of diatomic molecules

Discussion

28.	If the power of two lenses and P1 and P2; when they are combined; the effective power is:
Answer» If the power of two lenses and $P_{1}$ and $P_{2}$ ; when they are combined; the effective power is:

Discussion

29.	A particle of mass 'm' is projected with velocity 'u' at an angle θ with horizontal. During the period when the particle descends from highest point to the position where its velocity vector makes an angle θ2 with horizontal, work done by the gravity force is
Answer» A particle of mass 'm' is projected with velocity 'u' at an angle $θ$ with horizontal. During the period when the particle descends from highest point to the position where its velocity vector makes an angle $\frac{θ}{2}$ with horizontal, work done by the gravity force is

Discussion

30.	A river 400 m wide is flowing at a rate of 2 m/s. A boat is sailing at a velocity of 10.0 m/s with respect to the water, in a direction perpendicular to the river. Find the time (in seconds) taken by the person to reach the opposite bank at a point directly opposite to its starting point considering that after reaching the opposite bank, the person walks at 4 m/s if needed to reach the point directly opposite to its starting point.
Answer» A river 400 m wide is flowing at a rate of $2 m/s$ . A boat is sailing at a velocity of 10.0 m/s with respect to the water, in a direction perpendicular to the river. Find the time (in seconds) taken by the person to reach the opposite bank at a point directly opposite to its starting point considering that after reaching the opposite bank, the person walks at $4 m/s$ if needed to reach the point directly opposite to its starting point.

Discussion

31.	Kirchhoff's second law is an extension of:
Answer» Kirchhoff's second law is an extension of:

Discussion

32.	The maximum height reached by projectile is 4 m. The horizontal range is 12 m. Velocity of projection (in ms−1) is (g is acceleration due to gravity)
Answer» The maximum height reached by projectile is $4 m$ . The horizontal range is $12 m$ . Velocity of projection (in $m s^{- 1}$ ) is ( $g$ is acceleration due to gravity)

Discussion

33.	Hydrogen atom emits blue light when it changes from n = 4 energy level to n = 2 level. Which colour of light would the atom emit when it changes from n = 5 level to n = 2 level
Answer» Hydrogen atom emits blue light when it changes from n = 4 energy level to n = 2 level. Which colour of light would the atom emit when it changes from n = 5 level to n = 2 level

Discussion

34.	A submerged scuba diver hears the sound of a boat horn directly above her on the surface of the lake. At the same time, a friend on dry land 22.0 m from the boat also hears the horn (fig). The horn is 1.2 m above the surface of the water. What is the distance (labeled by "?” in fig) from the horn to the diver? Both air and water are at 20∘C. Bwater=2.2× 109 Pa, γair=1.4, Mair≈ 30g
Answer» A submerged scuba diver hears the sound of a boat horn directly above her on the surface of the lake. At the same time, a friend on dry land 22.0 m from the boat also hears the horn (fig). The horn is 1.2 m above the surface of the water. What is the distance (labeled by "?” in fig) from the horn to the diver? Both air and water are at 20 $^{\circ}$ C. $B_{w a t e r} = 2.2 \times 109 P a, γ_{a i r} = 1.4, M_{a i r} \approx 30 g$

34.

A submerged scuba diver hears the sound of a boat horn directly above her on the surface of the lake. At the same time, a friend on dry land 22.0 m from the boat also hears the horn (fig). The horn is 1.2 m above the surface of the water. What is the distance (labeled by "?” in fig) from the horn to the diver? Both air and water are at 20∘C. Bwater=2.2× 109 Pa, γair=1.4, Mair≈ 30g

Answer»

A submerged scuba diver hears the sound of a boat horn directly above her on the surface of the lake. At the same time, a friend on dry land 22.0 m from the boat also hears the horn (fig). The horn is 1.2 m above the surface of the water. What is the distance (labeled by "?” in fig) from the horn to the diver? Both air and water are at 20 $^{\circ}$ C.

$B_{w a t e r} = 2.2 \times 109 P a, γ_{a i r} = 1.4, M_{a i r} \approx 30 g$

Discussion

35.	A projectile is fired from the top of a 40 m high cliff with an initial speed of 50 m/s at an unknown angle. Find its speed when it hits the ground.
Answer» A projectile is fired from the top of a 40 m high cliff with an initial speed of 50 m/s at an unknown angle. Find its speed when it hits the ground.

Discussion

36.	Raindrops of radius 1 mm and mass 4 mg are falling with a speed of 30 m/s on the head of a bald person. The drops splash on the head and come to rest. Assuming equivalently that the drops cover a distance equal to their radii on the head, estimate the force exerted by each drop on the head.
Answer» Raindrops of radius 1 mm and mass 4 mg are falling with a speed of 30 m/s on the head of a bald person. The drops splash on the head and come to rest. Assuming equivalently that the drops cover a distance equal to their radii on the head, estimate the force exerted by each drop on the head.

Discussion

37.	A projectile motion is projected with a velocity μ at an angle θ, with the horizontal. For a fixed θ, which of the graphs shown in the following figure shows the variation of R versus μ
Answer» A projectile motion is projected with a velocity $μ$ at an angle $θ,$ with the horizontal. For a fixed $θ,$ which of the graphs shown in the following figure shows the variation of R versus $μ$

Discussion

38.	The short-wavelength limit shifts by 26 pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage ?
Answer» The short-wavelength limit shifts by 26 pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage ?

Discussion

39.	Why is difference between geostationary satellits and polar satellite
Answer» Why is difference between geostationary satellits and polar satellite

Discussion

40.	Dimensional formula of heat energy is
Answer» Dimensional formula of heat energy is

Discussion

41.	A cylindrical conductor of radius R is carrying a constant current i. The plot of the magnitude of the magnetic field B with distance d from the centre of the conductor is correctly represented by the figure
Answer» A cylindrical conductor of radius $R$ is carrying a constant current $i$ . The plot of the magnitude of the magnetic field $B$ with distance $d$ from the centre of the conductor is correctly represented by the figure

Discussion

42.	A cylindrical container is divided in two equal parts by a diathermic piston. Different ideal gases are filled in the two parts. Find the ratio of the mass of the molecules of the gas in the lower part to that of the upper part, if the root mean square velocity of molecules in the lower part is equal to the mean velocity of molecules in the upper part.
Answer» A cylindrical container is divided in two equal parts by a diathermic piston. Different ideal gases are filled in the two parts. Find the ratio of the mass of the molecules of the gas in the lower part to that of the upper part, if the root mean square velocity of molecules in the lower part is equal to the mean velocity of molecules in the upper part.

Discussion

43.	The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size θ and radius R is given by.
Answer» The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size $θ$ and radius R is given by.

43.

The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size θ and radius R is given by.

Answer»

The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size $θ$ and radius R is given by.

Discussion

44.	0. What is the effect of introducing (i) dielectric (ii) Conductor between the plates of a capacitor?
Answer» 0. What is the effect of introducing (i) dielectric (ii) Conductor between the plates of a capacitor?

Discussion

45.	In an interference experiment, the ratio of amplitudes of coherent waves is a1a2=13. The ratio of maximum and minimum intensities of fringes will be
Answer» In an interference experiment, the ratio of amplitudes of coherent waves is $\frac{a_{1}}{a_{2}} = \frac{1}{3}$ . The ratio of maximum and minimum intensities of fringes will be

Discussion

46.	The armature current in a dc motor is maximum when the motor has
Answer» The armature current in a dc motor is maximum when the motor has

Discussion

47.	The magnetic field at the origin due to the current flowing in the wire as shown in figure below is
Answer» The magnetic field at the origin due to the current flowing in the wire as shown in figure below is

Discussion

48.	Three particles execute SHM along x− direction with same frequency as x1=5sinωt, x2=5sin(ωt+53∘), x3=−10cosωt. Find the amplitude of the resultant SHM.
Answer» Three particles execute SHM along $x -$ direction with same frequency as $x_{1} = 5 sin ω t$ , $x_{2} = 5 sin (ω t + 53^{\circ})$ , $x_{3} = - 10 cos ω t$ . Find the amplitude of the resultant SHM.

Discussion

49.	Determine the change in volume of 6 litres of alcohol if the pressure is decreased from 200 cm of Hg to 75 cm of Hg. [Velocity of sound in alcohol is 1280 m/s density of alcohol =0.81 gm/cc, density of Hg=13.6 gm/cc and g=981 cm/s2]
Answer» Determine the change in volume of $6 litres$ of alcohol if the pressure is decreased from $200 cm$ of $H g$ to $75 cm$ of $H g$ . [Velocity of sound in alcohol is $1280 m/s$ density of alcohol $= 0.81 gm/cc$ , density of $H g = 13.6 gm/cc$ and $g = 981 {cm/s}^{2}$ ]

Discussion

50.	Consider a rope of total mass M and length L suspended at rest from a fixed mount. The rope has a linear mass density that varies with height as λ(z)=λ0sin(πz∖L), where λ0 is a constant. Constant gravitational acceleration g acts downward. The tension along the rope as a function of distance z below the mount is
Answer» Consider a rope of total mass $M$ and length $L$ suspended at rest from a fixed mount. The rope has a linear mass density that varies with height as $λ (z) = λ_{0} sin (π z ∖ L)$ , where $λ_{0}$ is a constant. Constant gravitational acceleration $g$ acts downward. The tension along the rope as a function of distance $z$ below the mount is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How to calculate the solid angle of a surface which is not perpendicular to the central line which passes through the centre of the angle .... It was something like. [ cos^2(thita)/radius squared]. Is this correct or if not then what's the formula

A car start moving along a line , first with accl= 2,startin s from rest then uniformly and decelerating at the same rate and comes to rest . The total time of motion is 10s . The average speed during the time is 3.2"m/s.How long does the car moved uniformly?

Two bodies A and B are arranged as shown in figure. Which of the following options is correct regarding body A?

If mass of A=10 kg , coefficient of static friction= 0.2, coefficient of kinetic friction = 0.2. The mass of B is 20 kg. Find acceleration of masses

A wire of magnetic dipole moment M and L is bent into shape of a semicircle of raduis r. What will be its new dipole moment?

A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will

Two blocks of mass 2 kg and 4 kg are kept in contact with each other on a smooth horizontal surface. A horizontal force of 12 N is applied on the first block due to which they move with certain constant acceleration. Calculate the force between the blocks.

If the separation between the two eyes of a man is d, what should be the minimum width of the mirror in which the man could see the full image of his face of width w, using both of his eyes.

Which of the following has the highest energy?

Rate of emission of a black body at 546∘ C is E. Then the rate of emission of radiation of body at 0∘ C will be

In the given figure, what is the work done by the spring force?

A proton and an electron are both travelling at the same speed. What can we conclude about their de Broglie wavelengths?

A bar magnet when placed at an angle of 30∘ to the direction of magnetic field induction of 5×10−2 T, experiences a moment of couple 25×10−6 N−m. If the length of the magnet is 5 cm its pole strength is

The mean radius of the earth is R, its angular speed on its own axis is ω and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geostationary satellite will be

Given that 0.2ˆi+0.6ˆj+aˆk is a unit vector. What is the value of a?

A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is

Earthing or grounding means

Find the nature of the graph of the following quadratic equation in terms of which side it will open. I. y = x2 − 8x a. open upward II. y = −2x2 + 3 b. open downward III. y = x2 − 6x + 4 c. open right d. open left

A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector →a is correctly shown in

A shell initially at rest explodes into two pieces of equal mass, then the two pieces will

Two particles of equal masses are revolving in circular paths of radii r1 and r2 respectively with the same speed. The ratio of their centripetal forces is

Two racing cars of masses m1 and m2 are moving in circles of radii r1 and r2 respectively. Their speeds are such that each makes a complete circle in the same duration of time t. The ratio of the angular speed of the first to the second car is

A 30kg hammer strikes a steel spike (nail) 2.30 cm in diameter while moving with speed 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110s. The average strain in the spike during the impact will be (Y=2×1011N/m2)

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produces oscillations of frequency f. If L is doubled and C is changed to 4C, the frequency will be

A drop of oil is placed on the surface of water. Which of the following statement is correct

For an ideal gas of diatomic molecules

If the power of two lenses and P1 and P2; when they are combined; the effective power is:

A particle of mass 'm' is projected with velocity 'u' at an angle θ with horizontal. During the period when the particle descends from highest point to the position where its velocity vector makes an angle θ2 with horizontal, work done by the gravity force is

Kirchhoff's second law is an extension of:

The maximum height reached by projectile is 4 m. The horizontal range is 12 m. Velocity of projection (in ms−1) is (g is acceleration due to gravity)

Hydrogen atom emits blue light when it changes from n = 4 energy level to n = 2 level. Which colour of light would the atom emit when it changes from n = 5 level to n = 2 level

A projectile is fired from the top of a 40 m high cliff with an initial speed of 50 m/s at an unknown angle. Find its speed when it hits the ground.

Raindrops of radius 1 mm and mass 4 mg are falling with a speed of 30 m/s on the head of a bald person. The drops splash on the head and come to rest. Assuming equivalently that the drops cover a distance equal to their radii on the head, estimate the force exerted by each drop on the head.

A projectile motion is projected with a velocity μ at an angle θ, with the horizontal. For a fixed θ, which of the graphs shown in the following figure shows the variation of R versus μ

The short-wavelength limit shifts by 26 pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage ?

Why is difference between geostationary satellits and polar satellite

Dimensional formula of heat energy is

A cylindrical conductor of radius R is carrying a constant current i. The plot of the magnitude of the magnetic field B with distance d from the centre of the conductor is correctly represented by the figure

The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size θ and radius R is given by.

0. What is the effect of introducing (i) dielectric (ii) Conductor between the plates of a capacitor?

In an interference experiment, the ratio of amplitudes of coherent waves is a1a2=13. The ratio of maximum and minimum intensities of fringes will be

The armature current in a dc motor is maximum when the motor has

The magnetic field at the origin due to the current flowing in the wire as shown in figure below is

Three particles execute SHM along x− direction with same frequency as x1=5sinωt, x2=5sin(ωt+53∘), x3=−10cosωt. Find the amplitude of the resultant SHM.

Determine the change in volume of 6 litres of alcohol if the pressure is decreased from 200 cm of Hg to 75 cm of Hg. [Velocity of sound in alcohol is 1280 m/s density of alcohol =0.81 gm/cc, density of Hg=13.6 gm/cc and g=981 cm/s2]