Physics · Fluid Mechanics
In a U-tube manometer measuring vacuum pressure at point B, if the right limb is open to the atmosphere and the liquid levels are below the centerline of B, what is the gauge pressure at point B? (Take ρ 1 = density of light liquid, h 1 = height of light liquid column, ρ 2 = density of heavy liquid, and h 2 = height of heavy liquid column)
- 1-(ρ 1 gh 1 - ρ 2 gh 2 )
- 2(ρ 1 gh 1 + ρ 2 gh 2 )
- 3-(ρ 1 gh 1 + ρ 2 gh 2 )✓
- 4(ρ 1 gh 1 - ρ 2 gh 2 )
Correct answer
-(ρ 1 gh 1 + ρ 2 gh 2 )
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