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.

have a great day because if you dont you and i will be sad

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.