Odpowiedź:
Wyjaśnienie:
Zad 1
W=3000J
t = 5 min = 300s
Oblicz moc P
P = W/t
P = 3000J/300s
P = 10W, watów
Zad 2
P = 400W (J/s)
W = 2000J
oblicz czas t
P=W/t...........*t
P*t=W .........../P
t = W/P
t= 2000J /400J/s
t = 5s
zad3
P=1500W
t = 1 min = 60s
oblicz W
W = P*t
W = 1500J/s *60s
W = 90 000J
W = 90kJ