A hail at $0^{o} C$ falls from a height of $1 k m$ on an insulated surface and its whole kinetic energy is converted into heat. What fraction of it will melt ?
(Latent heat of fusion of hail = $330 \times 10^{3} J / k g$ )

\frac{1}{33} \times 10^{- 4}

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\frac{1}{33}

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\frac{1}{8}

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whole of it will melt

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Solution

The correct option is B $\frac{1}{33}$
Potential will convert to heat energy.
Energy converted to heat is $m g h, h = 1000 m$
$m g h = m_{1} L, m_{1}$ is melted hail.

$m_{1} / m = \frac{1000 \times 10}{330 \times 10^{3}} = \frac{1}{33}$

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A hail at 0oC falls from a height of 1 km on an insulated surface and its whole kinetic energy is converted into heat. What fraction of it will melt ? (Latent heat of fusion of hail = 330×103J/kg)

The correct option is B 133Potential will convert to heat energy.Energy converted to heat is mgh, h=1000 mmgh=m1L,m1 is melted hail.m1/m=1000×10330×103=133

A hail at $0^{o} C$ falls from a height of $1 k m$ on an insulated surface and its whole kinetic energy is converted into heat. What fraction of it will melt ?
(Latent heat of fusion of hail = $330 \times 10^{3} J / k g$ )

The correct option is B $\frac{1}{33}$
Potential will convert to heat energy.
Energy converted to heat is $m g h, h = 1000 m$
$m g h = m_{1} L, m_{1}$ is melted hail.

$m_{1} / m = \frac{1000 \times 10}{330 \times 10^{3}} = \frac{1}{33}$