Nuclear power plants require large volumes of to cool reactors and convert heat to electricity.
air
water
salt
uranium

Nuclear power plants require large volumes of water to cool reactors and convert heat to electricity. Water is a good conductor of thermal energy and is conducive for cooling reactors because it can easily absorb energy without application of anything.

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.