Odpowiedzi

2010-04-06T11:34:54+02:00
Dane:
m=200g=0,2kg
c=4200J/(kg*°C)
ΔT=80°C
P=350W
t=?

Q=m*ΔT*c
Q=0,2kg*80°C*4200J/(kg*°C) = 67200J

Q=W

P=W/t
t=W/P
t=67200J/350W = 192s = 3min 12s