已知:V=5×10-4m3 ρ=1.0×103kg/m3 m0=0.2kg g=10N/kg S=5×10-3m2
求:(1)m水=?(2)p=?
(1)∵ρ=
m
V
∴杯子中水的质量为m水=ρV=1.0×103kg/m3×5×10-4m3=0.5kg;
(2)杯子对桌面的压强为p=
F
S
=
G
S
=
mg
S
=
(m0+m水)g
S
=
(0.2kg+0.5kg)×10N/kg
5×10−3m2
=1.4×103Pa.
答:(1)杯子中水的质量为0.5kg;
(2)杯子对桌面的压强为1.4×103Pa.空的地方是分数线已知求自行省略打得很辛苦求采纳谢谢谢啦!!