308-08-11

# 308-08-11 - 8 Blood pressure is usually given as the ratio...

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8. Blood pressure is usually given as the ratio of the maximum pressure (systolic pressure) to the minimum pressure (diastolic pressure). For example, a typical value for this ratio for a human would be 120/70, where the pressure is in mm Hg. What would these pressures be in Pascals? p = ρgh p 120mmHg = (13600)(9.807)(0.12) = 16005 PaG p 70mmHg = (13600)(9.807)(0.07) = 9334 PaG 9. A tank is constructed of a series of cylinders having diameters of 0.30, 0.25, and 0.15 m as shown. The tanks contains oil, water and glycerin and a mercury manometer is attached to the bottom as illustrated. Calculate the manometer reading h. SAE 300 Water Glycerin 0.1 m Mercury h 0.1 m 0.1 m 0.1 m The pressure is 0 PaG at free surfaces Then 0+ρ oil g (0.1 m) + ρ water g (0.1 m) + ρ glycerin g (0.2 m) – ρ Hg gh = 0 m 0324 . 0 13600 ) 1200 ( 2 . 0 ) 999 ( 1 . 0 ) 912 ( 1 . 0 ρ ρ 0.2 ρ 0.1 ρ 0.1 h Hg gly w oil = + + = + + = 10. The  rectangular gate CD shown is 1.8 m wide and 2.0 m long. Assuming the material of the

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308-08-11 - 8 Blood pressure is usually given as the ratio...

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