Question

用弹簧测力在这空气中称得一石块重1N;将石块完全侵入水中后,弹簧测力计的示数为0.6N.

Answer 1

1.0.4N

2.F浮=ρ液gV排

ρ液=1

g=10

V排=V=0.04m^3

3.m=ρV G=mg m=0.1kg

ρ=m/V=2.5kg/m^3