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**Unformatted text preview: **Fluids Prelab 1 Gauge Pressure Ignoring air pressure, show that the pressure caused by a column of water 1.00 inches tall is 248.9 Pa. The difference in pressure between the top and the bottom of a column of fluid of height h is Δ P = ρg h The density of water is ρ water = 1000 kg m 3 h = 1 . 00 inches = 2 . 54 cm = 2 . 54 × 10- 2 m Δ P = ρg h = 10 3 kg m 3 ! 9 . 8 m s 2 (2 . 54 × 10- 2 m) Δ P = 248 . 9 kg m s 2 ! 1 m 2 = 248 . 9 N m 2 = 248 . 9 Pa The difference in pressure Δ P is Δ P = 248 . 9 Pa 2 Atmospheric Pressure A smooth, thin, square piece of rubber, eight inches by eight inches, is sitting on a smooth table at sea level. What is the total force of the atmosphere on the material? Pressure is force per unit area, P = F A 1 so the force F is F = P A Atmospheric pressure is P = 1 atm = 14 . 7 lbs in 2 The area A of the piece of rubber is A = (8 in) × (8 in) = 64in 2 F = P A = 14 . 7 lbs in 2 !...

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