weight, gravitational force of attraction on an object, caused by the presence of a massive second object, such as the Earth or Moon. ... Alternatively, weight is the product of an object's mass and either the gravitational field or the acceleration of gravity at the point where the object is located.
Solar power is a renewable
energy resource source depends on time of
day and time of year. Its source is from the sun and the batteries that
needs this power does not run out of energy.
