What is the first stage of a thunderstorm?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?