# physics

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write down the formula and calculate the increase in length of a steel beam 17.5 metres in length under the following conditions;
1. the temperature of the steel has risen from 18 degrees celcius to 63 degrees celcius

• physics -

Increase = a(Tf-To)Lo =
11*10^-6(63 - 18)17.5=0.0087 meters.

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