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MGIMS WARDHA MGIMS WARDHA Solved Paper-2006

  • question_answer
    Hailstone at 0°C falls a from a height of 1 km on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt?\[(g=10m/{{s}^{2}})\]

    A) \[\frac{1}{33}\]                                

    B) \[\frac{1}{8}\]

    C) \[\frac{1}{3}\times 10-4\]            

    D) All of it will melt

    Correct Answer: A

    Solution :

    \[mgh=kmL\] \[k=\frac{gh}{L}\]                 \[=\frac{10\times 1000}{3.36\times {{10}^{5}}}\]                 \[=\frac{1}{33}\] (\[\because \]Latent heat of ice\[=3.36\times {{10}^{5}}\text{ }J/kg\])


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