How can water be used for by using solar panels. by having more windows in your home. by using sunlight passively and actively. by placing dams in tidal areas.

Water can be used for energy by placing dams in tidal areas.

Explanation:

Hydraulic energy is the energy supplied by the movement of water, in all its forms: waterfalls, rivers, sea currents, tides, waves, etc. This movement can be used directly, for example with a water mill, or more commonly be converted, for example into electrical energy in a hydroelectric plant.

Hydraulic energy is in fact a kinetic energy linked to the movement of water as in ocean currents, rivers, tides, waves or the use of potential energy as in the case of waterfalls and dams.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.