A gas mixture consists of 2 moles of oxygen and 4 moles of neon at temperature T. Neglecting all vibrational modes, the total internal energy of the system will be,

A bar magnet is released from rest along the axis of a very long vertical copper tube. After some time the magnet will

Two projectiles are projected at $$30^{\circ}$$ and $$60^{\circ}$$ with the horizontal with the same speed. The ratio of the maximum height attained by the two projectiles respectively is:

A gas is compressed adiabatically, which one of the following statement is NOT true.