Solved: The first length standard, adopted in the
Chapter , Problem 81(choose chapter or problem)
The first length standard, adopted in the eighteenth century,was a platinum bar with two very fine marks separated bywhat was defined to be exactly one meter. If this standardbar was to be accurate to within 1.0 pm, how carefullywould the trustees have needed to control the temperature?The coefficient of linear expansion is 9 X 10_6/C.
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