Question

A brass measuring tape is correct at 20 degree Celsius. The volume obtained when the length of a field is measured with the rule at 50 degree Celsius appears to be 70.5m. What is the true length of the field? Linear expansivity of brass is = 1.8 X 10^-5/k

Answer 1

Volume???

70.5=L(1+1.8e-5*50)
solve for Length L

Answer 2

Student

Answer 3

Student

Answer 4

using linear expansivity formula
a= change in length/ initial length * change in temperature
making initial length subject of the formula
L1 = l2/ 1+ adt
L1= 70.5/1+1.8*10^-5* (50-20)
L1 = 70.46

Answer 5

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