Jawabanmu

2014-04-05T10:39:34+07:00
Δl = lo x a x Δt
    = 25 x 0,000019 x 50
     = 0,02375 cm
2014-04-05T12:16:17+07:00
Delta L=Loxalfaxdelta T =25x0,000019x50 =25x0,00095 =0,02375