Assign1-2 - Problem Statement: A vacuum gage connected to a...

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Problem Statement: 59 A vacuum gage connected to a tank reads 15 kPa at a location where the barometric reading 750 mm Hg. Determine the absolute pressure in the tank. Schematic: Assumptions/Approximations: g is constant Physical Laws: [Equation 1-19] [Equation 1-15, for a vacuum] Properties/Sources: Conversions: 13590 1 N = 1.00 1mm = 0 m g = 9.81 1 kPa = 1000.00 Calculations: h = 0.75 m 100.0 kPa 85.0 kPa Reasoning/Verification/Discussion: Note that a vacuum reading is subtracted from atmospheric pressure. P ATM = ρ *g*h P ABS = P ATM - P GAGE ρ Hg = kg/m 3 kg*m/s 2 m/s 2 N/m 2 P ATM = ρ Hg *g*h = P ABS = P ATM - P GAGE = P ABS P ATM = 750 mmHg 15 kPa kPa
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Problem Statement: 63 The basic barometer can be used to measure the height of a building. If the barometer readings at the top and at the bottom of the buildin 730 mm Hg and 755 mm Hg, respectively, determine the height of the building. The densities of air and Hg are shown below. Schematic:
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This note was uploaded on 06/20/2009 for the course THERMO n/a taught by Professor N/a during the Spring '09 term at Abraham Baldwin Agricultural College.

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Assign1-2 - Problem Statement: A vacuum gage connected to a...

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