How much is the energy in 1 cubic meter of water as per Einstein equation?

Answer 1

E = M c2

We know the value of 'c'. In order to calculate 'E', we have to know 'M'.

Water has a density of 1 gram per milliliter. A milliliter is the same volume as a cm3.

1 cubic meter = (1 meter)3 = (100 cm)3 = 106 cm3.

So the mass of 1 cubic meter of water is 106 gram = 103 kilogram.

If 103 kilograms of mass is entirely converted to energy, perhaps by means of the
dilithium crystals in the ship's propulsion system, then the quantity of energy is

E = M c2 = (103) x (3 x 108)2 = (103) x (9 x 1016) = 9 x 1019 joules.

This is a fair amount of energy. I get 1 gigawatt for 2,852 years (rounded).