First slide

Thermal expansion

Question

Two beakers A and B of negligible coefficient of expansion are filled with water at $4^{\circ} C .$ Beaker ‘A’ is heated and beaker ‘B’ is cooled. Then

Moderate

A

water flows out in A, and water level falls down in B
B

water flows out in both cases
C

water level falls down in both cases
D

water level falls down in A and water flows out in B

Solution

$0^{0} C to 4^{0} C water expands$
$4^{0} C to 0^{0} C water expands$
$Density is maximum at 4^{0} C$

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