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23000 = 2 kg x 460 x Δt
1150 = 46 x Δt
1150 : 46 = Δt
25 = Δt
jadi, suhu besi setelah dipanaskan yaitu 25 + 25 = 50 derajat c
23000=2. 460. (t2-t1)
23000=920 (t2-25)
25= t2-25
t2=50