(a) What do you understand by thermal expansion of a substance?

(b) A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why?

Open in App

Solution

(a) The tendency of a matter to change its shape, volume and area in response to change in temperature is called thermal expansion.

(b) When the hot water is poured over the neck of the bottle, it expands. As a result the stopper gets loosened and can be removed easily.

Suggest Corrections

Similar questions

Explain the following:

(a) The telephone wires break in winter.

(b) Iron rims are heated before they are fixed on the wooden wheels.

(d) A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.

(e) A cement floor is laid in small pieces with gaps in between.

What do you understand by thermal expansion of a substance?

Q. Explain the following:

A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.

Explain the following : 1.telephone wires sag in summer

2.iron rims are heated before they are fixed on wooden wheels

3. The are left between the successive rails on a railway track

4. A cement floor is laid in small pieces with gaps in between

5. A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle

A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle

Join BYJU'S Learning Program

(a) What do you understand by thermal expansion of a substance? (b) A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why?

(a) The tendency of a matter to change its shape, volume and area in response to change in temperature is called thermal expansion. (b) When the hot water is poured over the neck of the bottle, it expands. As a result the stopper gets loosened and can be removed easily.

(a) What do you understand by thermal expansion of a substance?

(b) A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why?

(a) The tendency of a matter to change its shape, volume and area in response to change in temperature is called thermal expansion.

(b) When the hot water is poured over the neck of the bottle, it expands. As a result the stopper gets loosened and can be removed easily.