Achild does 350j of work while pulling a box from the ground up to his tree house with a rope. the tree house is 5.2 m above the ground. what is the mass of the box? a) 4.1 kg b) 6.9 kg c) 6.2 kg d) 5.2 kg

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above