silnik o mocy 4 W wykonuje prace 480 w czasie _______ ile minut
prosze z obliczeniami .
daje najj ; )
P=W/t
t=W/P
t=480J/4W
t=120s=2min
odp.w czasie 2 minut
Dane:
P=4w
W=480J
Szukane:
t=?
P=W/t/·W
P·W=t
t=4w·480J=1920s
1920s:60=32min
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P=W/t
t=W/P
t=480J/4W
t=120s=2min
odp.w czasie 2 minut
Dane:
P=4w
W=480J
Szukane:
t=?
P=W/t/·W
P·W=t
t=4w·480J=1920s
1920s:60=32min