(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 20.5°C? The coefficient of thermal expansion is 12 × 10/°C for steel and 0.9 x 10-6/°C for invar Imm Enter a number. (b) Repeat the calculation for two 27,0:01-long surveyor's tapes mm Subek Answer

(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 20.5°C? The coefficient of thermal expansion is 12 × 10/°C for steel and 0.9 x 10-6/°C for invar Imm Enter a number. (b) Repeat the calculation for two 27,0:01-long surveyor's tapes mm Subek Answer