First slide

Thermal expansion

Question

Two beakers A and B of negligible coefficient of expansion are filled with water at 4^oC . 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

For temperatures above 4⁰C , water expands.
For temperatures going from 4⁰C to 0⁰C , water expands.

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