(A) Let the block of ice fall from a height $h$.When the block of ice falls into the lake,its gravitational potential energy is converted into heat en

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(A) Let the block of ice fall from a height $h$.When the block of ice falls into the lake,its gravitational potential energy is converted into heat energy upon impact.This heat energy is responsible for melting a portion of the ice.The potential energy lost by the block is $PE = mgh$.The heat required to melt a mass $m/5$ of ice is $Q = (m/5)L$.Equating the potential energy to the heat energy,we get:$mgh = \frac{m}{5}L$Canceling $m$ from both sides,we have:$gh = \frac{L}{5}$Solving for $h$,we get:$h = \frac{L}{5g}$

Class 11 Physics 10-1.Thermometry, Thermal Expansion and Calorimetry Latent Heat and Heating Curve

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$A$ block of ice with mass $m$ falls into a lake. After impact,a mass of ice $m/5$ melts. Both the block of ice and the lake have a temperature of $0^{\circ}C$. If $L$ represents the latent heat of fusion,the minimum distance the ice fell before striking the surface is

A
$\frac{L}{5g}$
B
$\frac{5L}{g}$
C
$\frac{gL}{5m}$
D
$\frac{mL}{5g}$

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10-1.Thermometry, Thermal Expansion and Calorimetry

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Latent Heat and Heating Curve

Liquid oxygen at $50\ K$ is heated to $300\ K$ at a constant pressure of $1\ atm$. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time?

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Write the unit and dimensional formula for latent heat. On what factors does the value of latent heat depend?

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The graph shown in the figure represents the change in the temperature of $5 \, kg$ of a substance as it absorbs heat at a constant rate of $42 \, kJ \, min^{-1}$. The latent heat of vaporization of the substance is ......... $kJ \, kg^{-1}$.

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Boiling water is changing into steam. At this stage,the specific heat of water is

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Match the following items in Column-$I$ with their corresponding definitions in Column-$II$.
Column-$I$ Column-$II$
$A$. Conversion of liquid into solid is $1$. Regelation
$B$. Conversion of liquid into vapour is $2$. Sublimation
$C$. Conversion of solid into vapour directly is $3$. Fusion
$D$. Melting of ice caused by pressure is $4$. Vaporisation

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Column-$I$	Column-$II$
$A$. Conversion of liquid into solid is	$1$. Regelation
$B$. Conversion of liquid into vapour is	$2$. Sublimation
$C$. Conversion of solid into vapour directly is	$3$. Fusion
$D$. Melting of ice caused by pressure is	$4$. Vaporisation

$A$ block of ice with mass $m$ falls into a lake. After impact,a mass of ice $m/5$ melts. Both the block of ice and the lake have a temperature of $0^{\circ}C$. If $L$ represents the latent heat of fusion,the minimum distance the ice fell before striking the surface is

Similar Questions

Liquid oxygen at $50\ K$ is heated to $300\ K$ at a constant pressure of $1\ atm$. The rate of heating is constant. Which of the following graphs represents the variation of temperature with time?

Write the unit and dimensional formula for latent heat. On what factors does the value of latent heat depend?

The graph shown in the figure represents the change in the temperature of $5 \, kg$ of a substance as it absorbs heat at a constant rate of $42 \, kJ \, min^{-1}$. The latent heat of vaporization of the substance is ......... $kJ \, kg^{-1}$.

Boiling water is changing into steam. At this stage,the specific heat of water is

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