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NEET NEET SOLVED PAPER 2016 Phase-I

  • question_answer
    A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is :                                                                                                                                                                                 [Latent heat of ice is \[\text{3}\text{.4  }\!\!\times\!\!\text{  1}{{\text{0}}^{\text{5}}}\text{ J/kg}\]and g = 10 N/kg]

    A)  34 km                  

    B)  544 km

    C)  136 km                                

    D)  68 km

    Correct Answer: D

    Solution :

                     \[\frac{mgh}{4}=mL\]\[\Rightarrow \]\[h=\frac{4L}{g}=\frac{4\times 3.4\times {{10}^{5}}}{10}=136\,\text{km}\text{.}\]


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