Thermodynamics — Physics STD 11 Science — Question

What does SONAR stand for?

The pairs of physical quantities that have the same dimensions are:

1. Reynolds number and coefficient of friction.
2. Latent heat and gravitational potential.
3. Curie and frequency of light wave.
4. Planck's constant and torque.

If the speed of a rod moving at a relativistic speed parallel to its length is doubled,

1. The length will become half of the original value.
2. Mass will become double of the original value.
3. The length will decrease.
4. The mass will increase.

If it were possible for a gas in a container to reach the temperature 0K, its pressure would be zero. Would the molecules not collide with the walls? Would they not transfer momentum to the walls?

Although the r.m.s. speed of gas molecules is of the order of the speed of sound in that gas, yet on opening a bottle of ammonia in one corner of a room, its smell takes time in reaching the other corner. Explain why?

What is the order of magnitude of 0.00006?

The total energy of a simple pendulum is E. What will be the kinetic energy and potential energy of the pendulum at the instant when the displacement of the pendulum is half of the amplitude?

Why does a person in a satellite feels weightlessness?

Define one Barn. How it is related with metre?

Value of g is largest at the poles due to _________.