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Earlier discussion
11 older comments kept for context.
Wonderful Ntuk
It’s 100 not -100
Praise
The question is not correct... The second length is supposed to be more than the first... Linear expansivity.... It must expand....
Seriously, dont confuse us with this
Kenechukwu
I'm confused 😕
Ola yemi
This step is incorrect....the formula said L2-L1 not L1-L2
Emmanuel
Please try to solve step by step and break it down e en more for better understanding please
Ayeobasan John
It is 100°c not -100°c
Adams
From the formula given above
L²-L1? How was it possible to Subtract from the length 1 instead of 2?
Favour Nnenna
The person 🧍 who solved it made a mistake. L1 should be subtracted from L2 and when this is done you have a negative answer (-0.6). Just follow the steps you think is right using that same formula, you'll still arrive at the same answer. Thanks 🙌!
Ahmad
I also observed this
Doctor Strange
L\(_1\) = 100cm, T\(_1\) = 200\(^o\)C
L\(_2\) = 99.4cm,T\(_2\) = ?
\(\alpha\) = 2 x 10\(^{-5}\)C\(^{-1}\)
\(\alpha\) = \(\frac{L_2 - L_1}{L_1(T_2 - T_1)}\)
2 x 10\(^{-5} = \frac{100- 99.4}{100(200 - T_2)} = \frac{0.6}{100(200 - T_2)}\)
2 x 10\(^{-5}\) x \(100(200 - T_2) = 0.6\)
\(200 - T_2 = \frac{0.6}{0.002} = 300^oC\)
\(T_2 = 200 - 300 = -100^oC\)
Favour Nnenna
Sir, please solve the question accordingly following the formula exactly. This your solving is confusing more especially to mediocre ones. Thank you!