Expansion of solids and liquids

To measure the linear expansivity of a metal

To measure the linear expansivity of a metal We have seen that various substances do not expand equally when their temperatures are raised. Their properties in this respect are expressed by the linear expansivity, which is defined as follows. The linear expansivity of a substance is the fraction of its original length by which a rod of the …

To measure the linear expansivity of a metal Read More »

Useful applications of thermal expansion

Useful applications of thermal expansion Although expansion can be troublesome, it often proves very useful. The wheels of rolling-stock, particularly the driving wheels of locomotives, are fitted with steel tyres, which have to be renewed from time to time owing to wear. To ensure a tight fit the tyre is made slightly smaller in diameter than the wheel. …

Useful applications of thermal expansion Read More »