A 0.023kg acorn hangs from a branch 14m above the ground, what is the potential energy of the acorn? J

If the acorn falls to the ground with a speed of 16.57m/s, how much kinetic energy does it have?
J

Can someone explain to me how to do this problem ?

Which best represents the law of conservation of mass ?

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.