A rub- ber ball that sits motionless near the edge
of a tall bookshelf has no kinetic energy.
However, it does have mechanical energy.
Explain why this is possible.

help me plz give a full on explanation.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space