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how can i solve this? i have no idea.. help !

- Thread starter jsalapide
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- #1

- 40

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how can i solve this? i have no idea.. help !

- #2

dx

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- #3

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the coefficient of expansion of aluminum is 2.38x10^-5

the coefficient of expansion of copper is 1.68x10^-5

the equation I used was ∆L=(α∆T)(100cm)

i followed your instructions and..

my answer is 71.43 degrees..

is it right???

- #4

dx

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tnx for the help sir..

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1.On a hot day where the temperature is 32 degrees celsius, the distance between two lamp posts on the road is 30m as measured by a metal tape whose coefficient of linear expansion is hypothetically 50 x 10^-6 /degree Celsius. If the tape gives its correct reading at 20 degrees, what is the actual distance between the lamp posts?

my answer is 30.018 m..

is that correct?

- #7

dx

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Yes, I get the same answer.

- #8

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thanks a lot sir..

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