4. Marcia consumes 8.4 X 106J (2000 food calories) of energy per day while maintaining a constant weight What is the average power she produces in a day?

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

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