List of top Physics Questions on Energy

During the process of conversion from liquid to solid, the internal energy of the water
A car of mass 1000 kg having a velocity of 10 m/s collides a horizontally mounted spring. If the spring constant is 4000 N/m, then the maximum compression of the spring is
A steel ball of mass 200 g falls freely from a height of 20 m and bounces to a height of 10.8 m from the ground. If the energy lost in this process is absorbed by the ball, the rise in its temperature is:
A white dwarf star has volume V and contains N electrons so that the density of electron is \(n=\frac{N}{V}\). Taking the temperature of the star to be 0 K, what will be the expression for average energy per electron in the star?
In terms of total primary energy consumption. At present India stands at what position?