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JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Calorimetry

  • question_answer
    The weight of a person is 60 kg. If he gets 105 calories heat through food and the efficiency of his body is 28%, then upto how much height he can climb (approximately) [AFMC 1997]

    A)            100 m                                      

    B)            200 m

    C)            400 m                                      

    D)            1000 m

    Correct Answer: B

    Solution :

                       Suppose person climbs upto height h, then by using                    \[W=JH\] Þ \[mgh=JQ\]            Þ \[60\times 9.8\times h=4.2\times \left( {{10}^{5}}\times \frac{28}{100} \right)\] Þ \[h=200\,m\]


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