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Two satellites of masses 50 kg and 100 kg revolve around the earth in circular orbits of radii 9R and 16R. What is the ratio of speeds of the two satellites?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Most waves used for communication purposes rely on geostationary satellites because _____
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
A geostationary satellite seems to be fixed in the sky because it does not orbit the earth.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
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1
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A geosynchronous satellite always appears fixed in the sky.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
A completely elastic solid body partially regains its shape after removal of external force. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
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1
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Stress in a solid body is defined as ___________ per unit area.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
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1
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A car containing a beaker of water is moving horizontally on a level road. Consider two points, A & B, inside the water such that they are on the same horizontal level and are separated by a distance L.
asked
Oct 3, 2021
in
Class X
cbse
0
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1
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Temperature is absolute. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
At a given temperature a body emits energy of a single wavelength corresponding to that temperature. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Two bodies in thermal equilibrium can have different pressures. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
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1
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A block of mass 1kg is given a velocity of 5m/s on a horizontal flat surface. What will be the change in internal energy of the block-surface system,
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
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The behavior of real gases approaches that of ideal gas in which of these following conditions?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
What is the ratio of densities of 2 gases, O2 & N2, having partial pressures in the ratio 2:3?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
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Boyle’s law can be deduced from kinetic theory. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
What is the ratio of specific heats for a monatomic gas?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
In an SHM the time taken to go from mean position to A/2 is the same as that from A/2 to A. True or False? Here, A is the amplitude of motion.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
What will happen to the time period of a simple pendulum if temperature of the surroundings is significantly increased?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Damping force on a spring mass system is proportional to which of the following quantities?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
What is the ratio of speed of sound in air when measured after laplace correction to that measured by Newton’s formula?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Consider the case of normal modes of vibration for the air column with only one end closed. What is the length of the air column for the fundamental harmonic?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Consider standing waves in an air column with one end closed. What is a pressure node?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Laplace correction makes use of which of the following processes?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
y1 = 2sin(3x – 2t) & y2 = 3sin(3x – 2t + π/4). Find the expression for resultant displacement caused by superposition of the two waves.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Consider the phenomenon of beats & select the correct statement.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
In a standing wave the amplitude of a particle is fixed, but varies from particle to particle. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
A source moves towards a stationary observer with a speed of 10m/s. If the frequency of the source is 10Hz what will be the wavelength of sound heard by the observer? Speed of sound = 330m/s.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
If a string wave encounters a completely fixed end, what happens to its phase?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
What is the minimum distance between a node & an antinode in a standing wave?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
If a standing wave is vibrating in the fourth harmonic and the wavelength is λ, what is the length of the string.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
1
answer
Consider the case of normal modes of vibration for the air column with only one end closed. What is the length of the air column for the fundamental harmonic?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
physics
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