Question

By how much will a steel rod 1m long expand when heated from 25 "C to 55 C. The coefficient of volume expansion of steel in 3x 10^5 per °C​

Answer 1

Answer:

0.0003

Explanation:

The change in length of a material when heated is given by

∆L=Lo(alpha) ∆T

Here alpha is coefficient of linear expansion

And

$\gamma = 3 \alpha$

Here gamma is coefficient of volume expansion

so

$\alpha = \frac{ \gamma }{3} = {10}^{ - 5}$

So

∆L= 1×10^(-5)×(55-25)

= 0.0003m

So, the change in length is 0.0003m.

i.e The rod expands 0.0003m.

Note : Here coefficient of volume expansion is given as

3×10^5 but it cannot be this large so there might

be a typing mistake it needs to be 3×10^(-5).