1. The problem statement, all variables and given/known data A nuclear bomb containing 6.5kg of plutonium explodes. The sum of the rest masses of the products of the explosion is less than the original rest mass by one part in 10^4 . c) What mass of water could the released energy lift to a height of 3.1 km? 2. Relevant equations Well this is where I am stuck, I don't know what to use to plug in the height :/ ( I was given E=mc^2, E= mc^2 + k , etc...) 3. The attempt at a solution There was an a and a b before hand ( the energy released from the explosion which was 5.85 * 10^13 J and the average power over 3.7 microseconds which was 1.58*10^19 Watts) but I really cannot seem to figure out what to do because I have no equations ( or none that I know of) that include the height.