Physics Problem of the Week! A ship heats its boilers and propels itself without the use of coal or oil in the following way: it pumps in warm sea water, concentrates the extracted heat in its boilers; and discharges the cooled sea water (possibly as ice) back into the ocean. Does it violate the conservation of energy act? Will this work? -------------------- this is a problem for school, it's not worth anything really. So far, I've said this does not violate the conservation of energy act because the heat is taken from the water and used to heat the boilers. But I think this will not work because there won't be enough heat from the water (plus, if it worked, we would be doing that now). What are you ideas? Am I correct?