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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoCalorimetryEasy2 minPYQ_2016

PhysicsEasysingle choice

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 $3.4 \times 10^{5} {J kg}^{- 1}$ and $g = 10 {N kg}^{- 1}$ )NEET 2016 (Phase 1)

Options:

Answer:

Solution:

$\frac{1}{4} m g h = m L$

$h = \frac{4 L}{g} = \frac{4 \times 3.4 \times 10^{5}}{10} = 13.6 \times 10^{4}$

$= 136 \times 10^{3} m$

$= 136 k m$

Stream:NEETSubject:PhysicsTopic:Heat & ThermoSubtopic:Calorimetry

⏱ 2mℹ️ Source: PYQ_2016

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