A 200 cm bar increases in length by 2 cm when its temperature rises by 100 degrees C. Its linear expansivity is
- 0.001 per degrees C.
- 0.0001 per degrees C.
- 0.0101 per degrees C.
Explanation from PART66Online
Linear expansivity equals the change in length divided by the original length and temperature change: 2 cm over (200 cm times 100 degrees C) gives 2/20000, which is 0.0001 per degree C. Mis-placing the decimal yields the 0.001 or 0.0101 distractors.
J
Jordi asked · 13 Jun 2020
i dont understand it
Community Comments (2)
9
989369875846
15 Jun 2020
Expansivity=(1/original length)×(changes of length/changes of temperature)
J
Jordi
15 Jun 2020
Thank you for your answer
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