Ex 1 An 80 N box of clothes is pulled 20m up a 30° ramp by a force of 115 N that points along the ramp. If the
kinetic friction between the box and ramp is 11.4 N, calculate the change in the box's kinetic energy.

The force will determine the acceleration.

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?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt