Can someone help me answer these? It‘s about linear expansion1. A piece of copper wire is 40 cm long at 20 degrees Celsius. What will be its length if it is heated to 120 degrees Celsius?2. An aluminum sheet 80 cm long and 30 cm wide is heated from 35 degrees Celsius to 145 degrees Celsius. What will be its area after heating.For the length, centimeters should be converted to metersThanks for the help. :)
Linear expansivity for copper is α 17 x10^-6 θ is increase in temp Increase in length L α θ 40 * 17 x10^-6 * [120 -20] 0.068 cm Final length is 40 .068 cm 0.4068 m . Linear expansivity for aluminum is α 24 x10^-6 Increase in length L α θ 80 * 24 x10^-6 * [145 - 35] 0.2112 cm. Final length 80 .0.2112 cm 0.802112 m Increase in width 0.2112 * [30 / 80] 0.0792cm Final width 30.0792 cm 0.300792 m Final area 0.802112 x 0.300792 0.241268872704 m^2.
What are the respective co-efficients of linear expansion for the 2 materials ??
Multiply the coefficient by the length and temperature change. (Be sure to use the length dimension included with the coefficient, probably meters.) Add this result to the original length.
