Acarnot engine's operating temperatures are 240 ∘c and 20 ∘c. the engine's power output is 910 w . part a calculate the rate of heat output. express your answer using two significant figures.

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Which of the following is an example of motion in two dimensions?

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?