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4. A steel cable spanning a river is 220.000 m long when the temperature is 30.°C.
What will be its length when the temperature drops to 0°C? (The coefficient of
thermal expansion of steel is 12x10-6K-1).

Respuesta :

opudodennis

Answer:

219.9208  m

Explanation:

The new length is given by

New length= Original length *(1-Temperature change*coefficient of

thermal expansion of steel)

Here, the change in temperature is [tex]30^{\circ}-0^{\circ}= 30^{\circ}[/tex]

New length= [tex]220.000(1-30*12x10^{-6}=219.9208m[/tex]

Therefore, the new length will be 219.9208 m

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