Question

In cat timp urca o pompa cu putrea de 80 KW 0,5 m^3 apa intr-un rezervor situat la inaltimea de 20 m? (ρ apa=1000 kg/m^3 , g=10 N/kg )

va rog dau coroana

Answer 1

V=0.5 m^3

P=80.000 W

H=20 m

P=L/t

t=L/P=G*H/P

M= p×V=1000* 0.5 = 500 kg

G= m*g =500*10=5000 N

L= G* h = 5000*20=100.000 J

t=L/P=100.000/80.000=1,25 s.