To calculate the heat loss through the wall of a building, it is necessary to know the temperature difference between the inside and outside walls. Temperatures of 5C and 20C are measured on each side...

To calculate the heat loss through the wall of a building, it is necessary to know the

temperature difference between the inside and outside walls. Temperatures of 5C

and 20C are measured on each side of the wall by mercury-in-glass thermometers

with a range of 0e50C and a quoted inaccuracy of 1% of full-scale reading

Calculate the likely maximum possible error in the calculated value for the temperature difference.

Briefly discuss how using measuring instruments with a different measurement range

might improve measurement accuracy.