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It is estimated that 1 kg of body fat will provide 38000000Joules of energy. A 60kg mountain climber decides to climb a mountain 4000m high.

(a) How much work does the climber do against gravity in climbing to the top of the mountain>

(b) If the body's efficiency in converting energy stored as fat to mechanical energy is 25%, determine the amount of fat the climber will use up in providing the energy required to work against gravity.

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