posted by Hannah on .
A steel measuring tape is calibrated at 20 degrees Celsius. A reading of 32.10m is measured when it is used to find the length of a building. If the temperature is 5degrees Celsius, what is the actual length of the building at that temperature?
The coefficient of linear expansion for steel is 12*10^-6
Does the building expand also? What is its coefficent of linear expansion?
It just says to take into consideration the measuring tape and not the building.
You can get the length of the tape at 5C by
deltaL=32.10*12E-6*(15)then subtracting deltaL from that L.
Opps, add delta L to L. The tape shrinks, so the measurement of the building is longer.