What type of weather is usually associated with a cold front?
A. Clear skies
B. Thunderstorms
C. High humidity
D. Sudden rise in temperature

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?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8