20 POINTS MULTIPLE CHOICE
if the mass on a skateboard doubled, but the net force on it remained constant, what would happen to the acceleration of the skateboard?
A) it would double
B) it would cut in half
C) It would be four times greater
D) it would be cut by a quarter

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

How would a small bar magnet be oriented when placed at position x?