Physics

11) A 50-g chunk of 80 C iron is dropped into a cavity in a very large block of ice at 0 C. How much ice will melt. (The specific heat capacity of iron is 0.11 cal/g C.). For water, the latent heat of fusion is L=80 cal/g. 12) How can water be brought to a boil without heating it? 13) An object weighs 10 N out of water and 8 N in the water. What is the buoyant force? 14) Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size? 15) Since energy is radiated by all objects, why can't we see them in the dark