Question

what is thermal expantion?describe three applications of thermal expanation.​

Answer 1

Answer:

The difference in expansion causes the bimetallic strip to bend when the temperature is changed. This movement has many common uses including: thermostats to control temperature, oven thermometers to measure temperature, and switches to regulate toasters.

Explanation:

Answer 2

Following are the advantages of thermal expansion:

• (1) If we find it difficult to remove the stopper from a glass bottle, we can heat the neck of the bottle. Now the neck of the bottle expands and the stopper comes out easily.
• (2) The principle of thermal expansion is used in fixing iron rim with the wooden wheel firmly.
• (3) Rivets are used to hold steel plates together very tightly. A very hot rivet is pushed through the two plates and its end is hammered over. When the rivets cools down it pulls the two plates together very tightly.