### Assume the student''s mass is 53.0 kg

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Q1. To calculate the program, suppose she runs up a flight of 85 steps, each 0.150 m high, in 69.0 s. For ease, ignore an energy she uses in coming down (which is small). Assume that a typical efficiency for human muscles is 20.0 percent. This means that while your body converts 100 J from metabolizing fat, 20 J goes into doing mechanical work (here, climbing stairs). The remainder goes into internal energy. Assume the student's mass is 53.0 kg.

Q2. An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 37 mm and 92 mm. The electric potential of the inner conductor regarding the outer conductor is -574 V.

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