Jawabanmu

2014-04-09T23:30:34+07:00
ΔL=Lo.α.ΔT
ΔL=80.17x10⁻⁶.(78°-28°)
ΔL=68x10⁻⁴ m
2014-04-10T00:31:43+07:00
AL = 80.17x10x (78-28) AL = 68x10 pangkat 4