An ideal gas is enclosed in a piston, and 1200 j of work is done on the gas. as this happens, the internal energy of the gas increases by only 500 j. during this process, how much heat flows into or out of the ideal gas? enter a positive number to indicate a heat flow into the gas, or a negative number to indicate a heat flow out of the gas.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.