Two spherical objects have equal masses and experience a gravitational force of 65 N towards one another. Their centers are 49 cm apart. Determine each of their masses.

You are sitting on the beach and wondering about the properties of mechanical waves. describe them in terms of ocean waves.

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?