Question

an iron rod of length 30cm is heated through 50Kelvin. calculate it's increase in length °C (Linear expansivity of iron=1.2 x 10^-5K ^-1)​

Answer 1

0.018 cm

Step-by-step explanation:

The increase in length can be calculated using the formula:

ΔL = α * L * ΔT

where ΔL is the increase in length, α is the linear expansivity of iron, L is the original length of the rod, and ΔT is the change in temperature.

Plugging in the values, we get:

ΔL = 1.2 x 10^-5 * 30 * 50

ΔL = 0.018 cm

So, the iron rod increases in length by 0.018 cm when heated through 50 Kelvin.