In: Physics
(a) Suppose a meter stick made of steel and one made of invar are the same length at 0°C. What is their difference in length at 45.0°C? The coefficient of thermal expansion is
12 ✕ 10−6/°C for steel and 0.9 ✕ 10−6/°C for invar.
(b) Repeat the calculation for two 38.5-m-long surveyor's tapes.