Question

Calculate the pressure required to stop the increase in volume of a copper block when it is
heated from 50°C to 70°C. Coefficient of linear expansion of copper = 8.0 x 10-6 per °C and bulk modulus
of elasticity = 1.3 x 1011 Nm-2​

Answer 1

Answer:

375

Explanation:

Area of first cross road which is rectangle = l×b

Hence area =72m×3m=216m

2

Area of 2nd cross road which is rectangle =

=56m×3m=168m

2

m

Area of middle part which is square =3m×3m=9m

2

Area of cross roads =(216+168)m

2

−9m

2

=384m

2

−9m

2

=375m

2

Answer 2

Answer:

Calculate the pressure required to stop the increase in volume of a copper block when it is

heated from 50°C to 70°C. Coefficient of linear expansion of copper = 8.0 x 10-6 per °C and bulk modulus

of elasticity = 1.3 x 1011 Nm-2