The copper tube is 0.5 m long at a temperature of 200 degrees. Determine the length of this tube at a temperature of 10C.

1) Let it be given: l1 is the length of the tube at a lower temperature t1 = 10 °, t2 is the initial temperature of the tube, t2 = 200 °, while the length of the tube is l2 = 0.5 m.

2) We use the formula for the change in body length depending on heating, where tcs is used – the temperature coefficient of expansion for copper, a = 0.000017.

3) The temperature difference dt = t1 – t2 = 200 ° – 10 ° = 190 °, then the formula for changing the length:

l2 = l1 / (1 + a * dt) = 0.5 / (1 + 0.000017 * 190 °) = 0.5 / (1 + 0.00323) = 0.5 / 1.00323 = 0.4984 m.