Please help. Thank you! A tired squirrel (mass of 1kg) does push-ups by applying a force to elevate its center-of-mass by 5cm. Determine the number of push-ups which a tired squirrel must do in order to do a mere 1.0 joule of work. If the tired squirrel does all this work in 4 seconds, then determine its power.

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.