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Thursday, November 13, 2014

FAQ: Why an ordinary measuring scale is made from wood and not from metal?

We all know that the volume of every solid material is contract and expand with the effect of temperature. The contraction and expansion of metal is much higher compared to wood. With the temperature increase the length of the metal scale increases and with low temperature the length of the metal scale is reduced. So if someone measures length of something with a metal scale then there may exist error in the length reading.

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