Fluid Mechanics — Physics STD 11 Science — Question

Find degree of freedom of a monoatomic gas.

Is it possible for a current loop to stay without rotating in a uniform magnetic field? If yes, what should be the orientation of the loop?

Define second on the basis of vibrations of cesium-133.

Name the factors affecting the velocity of sound in a medium.

If the velocity of an object is constant, can its speed change? Why?

Name the apparatus used to demonstrate the phenomenon of the reflection of waves.

When we step barefoot into an office with a marble floor, we feel cold. Why?

Answer carefully, with reasons: In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the balls (i.e. when they are in contact)?

Underline the correct alternative: When a conservative force does positive work on a body, the potential energy of the body increases/ decreases/ remains unaltered.