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dlinn [17]
3 years ago
13

If a girl is standing still and holding a box, is she doing any work? (No)

Physics
2 answers:
SpyIntel [72]3 years ago
7 0

Answer:

gravity

Explanation:

maxonik [38]3 years ago
6 0
The gravity on the box is not the same force as the movement
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Answer:

D. 130 J

Explanation:

The coefficient of performance for a machine that is being used to cool, is given by:

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Here Q_C  is the heat removed from the cold reservoir, W is the work required, that is, the energy required to remove the heat from the interior of the house, T_C is the cold temperature and T_H is the hot temperature. Recall use absolutes temperatures(273.15+^\circ C). Replacing and solving for W:

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3 years ago
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