Question

1.一个空心球质量为27g,在其中空部分注满酒精后,空质量为48g,求铝球体积?

Answer 1

1.m酒精=48g-27g=21g

ρ酒精=0.8g/cm^3

v=m/ρ=21/0.8=26.25cm^3

2.v=1577m/2*60s

t=s/v=515s