Answer:
L=2.003696
Explanation:
The question is on expansion due to heat
The general formulae is;
L= L₀ { 1+∝(T₂-T₁)}
where L₀ is initial length of bar at 20°, L is length of bar at asked temperatures, ∝ = 23.1× 10^-6 °c , T₂ is the final temperature, T₁ is the initial temperature in °c
Given;
L₀=2m
T₂=100°c
T₁=20°c
∝ = 23.1× 10^-6 °c
Substitute values in the equation
L= L₀ { 1+∝(T₂-T₁)}
L=2{1+23.1× 10^-6(100-20)}
L=2{1.001848}
L=2.003696
