2011泸州物理中考11答案

p=w/t=44kwh/40h=1，1kw=1100w

I = p/U = 1100 w/220v = 5A

w = 0.75 * 44 * 1000 * 3600j = 118800000j

W = mgh = rho水*V*g*h

V=W/(ρ水* g * h)= 11880000/(1000 * 10 * 10)= 1188 m3 > 1000 m3

可注满1000m3的水池。