A hole is drilled in a copper sheet. The diameter of the hole is 4.24

1.	A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0°C. What is the change is the diameter of the hole when the sheet is heated to 227°C? Coefficient of linear expansion of copper = 1.70 x 10-5°C-1.
Answer» Here, L = diameter of hole = 4.24 cm ΔT = 227 - 27 = 200°C and α = 1.70 x 10^-5°C^-1 ∴ Change in diameter, ΔL = α x ΔT x L = 1.70 x 10^-5 x 4.24 x 200 = 1.44 x 10^-2 cm

A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27.0°C. What is the change is the diameter of the hole when the sheet is heated to 227°C? Coefficient of linear expansion of copper = 1.70 x 10-5°C-1.

Answer»

Here, L = diameter of hole = 4.24 cm

ΔT = 227 - 27 = 200°C

and α = 1.70 x 10^-5°C^-1

∴ Change in diameter, ΔL = α x ΔT x L

= 1.70 x 10^-5 x 4.24 x 200

= 1.44 x 10^-2 cm