Question

give reasons for the following..
ans this correctly
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Answer 1

Answer:

Explanation:

a)The air molecule inside the test tube have a higher mobility when heated ( They move around more ) . ... If the internal pressure becomes greater than the external pressure plus frictional force acts on the cork and as a result the cork will come loose of the of the test tube .

b)metal expends on heating. When the outer bowl is heated it expands and as a result the inner bowl can be easily removed.

c)Iron rims are made smaller than wooden wheels. When the iron rim is heated, it expands and will have the same size as wooden wheels. When water is poured, the rims become cool and get compressed. Thus it can take the shape of the wooden wheel and gets fixed on the wheels firmly.

Answer 2

Answer:

hope it helps you good luck