Question

by how much will still bar 1 metre long expand when heated from 25 degree Celsius to 55 degree Celsius the coefficient of volume expansion of a steel is 3 into 10 to the power _5​

Answer 1

The increase in the length of the Steel bar will be equal to 3x $10^{6}$

Explanation:

• The coefficient of volume expansion of steel is equal to 3x$10^{5}$ , hence the coefficient of linear expansion of Steel, ā ,will be equal to
• As we know that the expansion increase of length of a metal dt= l•ā•dt

• Here the change of temperature dt= 30degree

• The initial length is equal to 1 metre
• hence the increase in the length of the Steel when the temperature is considerably changed will be equal to 1x 30x $10^{5}$  = 3x $10^{6}$