Two masses are compressed against a spring as shown in the figure; the system is at rest. The mass of m1 is 1.2 kg and m2
has a mass of 1.8 kg. When the masses are released, m2
travels to the right at 2.0 m/s. What is the speed of m1 after
the spring is released? Assume the horizontal surface is
frictionless.

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

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?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat