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2014-03-29T16:53:33+07:00
Q = mcΔT
Q = 2 x 460 x (70-20)
Q = 920 x 50
Q = 46000 Joule = 4,6 x 10^4 Joule.
2014-03-29T18:17:40+07:00
Q = m.c.ΔT
Q = 2 kg. 460J/kg°C. 50°C
Q = 46000 Joule
   = 46 x 10³ Joule