<em><u>Answer:</u></em>
The new length is 1.20138 m
<em><u>Explanation:</u></em>
<u>1- We get the increase in length:</u>
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
<u>2- getting the new length:</u>
new length = old length + increase in length
new length = 1.2 + 0.00138
new length = 1.20138 m
Hope this helps :)
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Fossil fuels are easy to find beneath the earths surface , fossil fuels has unlimited potential, and fossil fuels are very cost effective, especially coal.
Disadvantages
Burning fossil fuels can cause greenhouse effect which is harming the environment and mining fossil fuels may also endanger the lives of animals.
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