what is the displacement of a cyclist who travels 1 mile north 1 mile east then finally 1 mile south

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 is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Which of the following are appropriate acceleration units?