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i need help selecting the right answers for 18, 19, and 20

18. A copper cable (a = 17 X 106/C) of 300 (m) length at 0°C is heated to 40 °C. What is its new length? a. 300.24 (m) b. 300
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Answer #1

18 300 204 m L=L(+2DT) = 300 (1 + 17x10-6x40) in 1 Ansi-A 19 Ti = 125+273) K= 298 K. Pf = 2 Pi V=constat- PLT PL - It Tf = 2

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