密度问题在线等

2025-12-16 12:10:26
推荐回答(1个)
回答1:

ρ铅gv=29.7
ρ铅gv-ρ水gv=18.7
ρ铅/(ρ铅-ρ水)=29.7/18.7
(29.7/18.7)(ρ铅-ρ水)=ρ铅
ρ铅=2.7