m = Q ÷ c ÷ ∆t
Q = 800 Дж
c меди = 400
∆t = 20°c
m = 800 ÷ 400 ÷ 20
m = 0,1кг = 100г
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m = Q ÷ c ÷ ∆t
Q = 800 Дж
c меди = 400
∆t = 20°c
m = 800 ÷ 400 ÷ 20
m = 0,1кг = 100г