Hailstones fall from a certain height. If they melt completely on reaching the ground, find the height from which they fall. (`g=10ms^(-2),L=80` calorie/g and J=4.2 J/calorie.)

Hailstones fall from a certain height. If they melt completely on reac

1.	Hailstones fall from a certain height. If they melt completely on reaching the ground, find the height from which they fall. (`g=10ms^(-2),L=80` calorie/g and J=4.2 J/calorie.)
Answer» On reaching the ground, a hailstone of mass M losses potential energy which is converted into he energy required to melt it. In Sl, potential energy required for melting the hailstons `Mgh=MLrArrgh=L` `h=(L)/(g), h=(80xx4.2xx1000)/(10)` `=33.6xx1000m=33.6km`.

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Hailstones fall from a certain height. If they melt completely on reaching the ground, find the height from which they fall. (`g=10ms^(-2),L=80` calorie/g and J=4.2 J/calorie.)

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