P=W/t t=Q/P Q =60%W=0,6 x m x cw x ΔT
Q= 0,6 x 5kg x 4200J/kg x st C x ( 100stC - 20 st. C)
Q=1008000J /600W = 1680s =28 minut
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P=W/t t=Q/P Q =60%W=0,6 x m x cw x ΔT
Q= 0,6 x 5kg x 4200J/kg x st C x ( 100stC - 20 st. C)
Q=1008000J /600W = 1680s =28 minut