(1)∵G物=78.4N,浸入水中F拉=68.6N
∴F浮=78.4-68.6N=9.8N
(2)根据阿基米德定理得F浮=G排=9.8N
∴排水9.8N
m水=9.8N/(1N/kg)=1kg
v=m/ρ=1kg/1*10^3=0.001m^3
v物=V排=0.001m^3
(3)ρ=m/v=(G/g)/0.001m^3=(78.4N/9.8N)/0.001m^3=0.008kg/m^3
纯手打,
(1)∵G物=78.4N,浸入水中F拉=68.6N
∴F浮=78.4-68.6N=9.8N
(2)根据阿基米德定理得F浮=G排=9.8N
∴排水9.8N
m水=9.8N/(1N/kg)=1kg
v=m/ρ=1kg/1*10^3=0.001m^3
v物=V排=0.001m^3
(3)ρ=m/v=(G/g)/0.001m^3=(78.4N/9.8N)/0.001m^3=0.008kg/m^3
纯手打,