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

  • question_answer
     Of two masses of 5 kg each falling from height of 10 m, by which 2kg water is stirred. The rise in temperature of water will be                                                         [RPET 1997]

    A)            2.6°C                                        

    B)            1.2°C

    C)            0.32°C                                     

    D)            0.12°C

    Correct Answer: D

    Solution :

                       \[W=JQ\] Þ \[(2m)gh=J\times {m}'c\Delta \theta \] Þ \[2\times 5\times 10\times 10=4.2(2\times 1000\times \Delta \theta )\] Þ \[\Delta \theta =0.1190{}^\circ C=0.12{}^\circ C\]


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