75cmHg等于多大压强怎么算的?
问题描述:
75cmHg等于多大压强怎么算的?
答
答案:99960Pa
解析:
P=ρgh, ρ水银=13600kg/m3,g=9.8N/kg,h=75cm=0.75m
=13600x9.8x0.75
=99960Pa