(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

Medium

$A$ 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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Class 11

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Chapter

10-1.Thermometry, Thermal Expansion and Calorimetry

Subtopic

Latent Heat and Heating Curve

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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$A$ solid material is supplied with heat at a constant rate. The temperature of the material changes with heat input as shown in the figure. What does the slope of $DE$ represent?

Medium

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$A$ solid substance is at $30^{\circ}C$. To this substance,heat energy is supplied at a constant rate. The temperature versus time graph is as shown in the figure. The substance is in the liquid state for the portion of the graph:

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$A$ quantity of heat required to change the unit mass of a solid substance,from solid state to liquid state,while the temperature remains constant,is known as

EasyAIIMS 1998

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$A$ block of ice at $-10\,^oC$ is slowly heated and converted to steam at $100\,^oC.$ Which of the following curves represents the phenomenon qualitatively?

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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

$A$ solid material is supplied with heat at a constant rate. The temperature of the material changes with heat input as shown in the figure. What does the slope of $DE$ represent?

$A$ solid substance is at $30^{\circ}C$. To this substance,heat energy is supplied at a constant rate. The temperature versus time graph is as shown in the figure. The substance is in the liquid state for the portion of the graph:

$A$ quantity of heat required to change the unit mass of a solid substance,from solid state to liquid state,while the temperature remains constant,is known as

$A$ block of ice at $-10\,^oC$ is slowly heated and converted to steam at $100\,^oC.$ Which of the following curves represents the phenomenon qualitatively?

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