Question

22222222222 (13 14:12:40)

Answer 1

(1)P差=P钢-P铝=5.2*10^3kg/m^3

15.6kg/5.2*10^3kg/m^3=3kg

(2)1.G铜=4.9N 2.G铁=4.9N 3.浸没与水F铜=1.96N 4.浸没与水F铁=1.96N

判断:G铜=G铁=4.9N

(3) 不对,m冰=P冰V冰=0.9*10^3kg/m^3*1.11*10^-3m^3=0.999kg

m水=P水V水=1.0*10^3kg/m^3*1*10^-3m^3=1kg