Answer:
The new length is 1.20138 m
Explanation:
1- We get the increase in length:
The old length = 1.2 m
The coefficient of expansion of of aluminum is 23 10⁻⁶ /K.
The old temperature is 15°C.
The new temperature is 65°C
The increase in length= old length coefficient of expansion change in temperature
The increase in length = 1.2 23 10⁻⁶ (65-15)
The increase in length = 0.00138 m
2- getting the new length:
new length = old length + increase in length
new length = 1.2 + 0.00138
new length = 1.20138 m
Hope this helps :)
