What is the purpose of the sharps disposal in a laboratory?

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

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?

Which word expression describes how much to calculate pressure