How much potential energy is contained in a spoonfull of seawater? How?

Answer 1

If you are not talking about annihilating the mass in some sort of nuclear reaction, the potential energy is zero if it is sitting on the ground.

Otherwise, you need to assume that the spoon is 25 mL and you need to look up the density of sea water, but I think that 1.05 is close. So, we are talking about 26.25 grams or .02625 kilograms. Go ahead and plug into:

E = mc^2 and get .02625 * (3*10^8)^2
= .02625 * 9*10^16 joules. A big number.

Answer 2

e=mc^2 simple right?