Gravity is to the distance between and difference in mass between two objects

Explanation:

Force of gravity is the force which attracts objects along with its mass towards the Earth or ground.

Mathematically,       F =

where                F = force of gravity

                         G = gravitational constant

                          = mass of object 1

                          = mass of object 2

                          r = distance between the given masses

Therefore, more is the mass of object more will be the force of gravity. Whereas more is the distance between objects or masses then less will be the force of gravity.

Hence, we can conclude that gravity is inversely proportional to the distance between masses and directly proportional to the masses of objects.  

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000