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A stationary objected at `0^(@)C` and weighing 3.5 kg falls from a height of 2000m on a snow mounation at `0^(@)C`. If the temperature of the object just before hitting the snow is `0^(@)C` and the object comes to rest immediately `(g = 10 m//s^(2))` and (latent heat of ice = `3.5 xx 10^(5) "joule"//s)` then the mass of ice that will melt is -A. 2 kgB. 200 gramC. 20 gramD. 2 gram |
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Answer» Correct Answer - 2 Suppose m kg of ice melts then by using `underset(("Joules")) W = underset(("Joules")) H` `rArr MgH = mL rArr 3.5 xx 10 xx 2000 = m xx 3.5 xx 10^(5)` `rArr m= 0.2 kg = 200 gm` |
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