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HW01_Sol - volume 4 A steel tank of cross sectional area 3...

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ME 3513 – Thermodynamics I Solutions to Homework Assignment # 1 – Basic Concepts and Definitions 1. An electric dip heater is put into a cup of water and heats it from 20 º C to 80 º C. Show the energy flow(s) and storage and explain what changes. 2. A pressurized steel bottle is charged with 5 kg of oxygen gas and 7 kg of nitrogen gas. How many kmoles are in the bottle?
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3. A 1 m 3 container is filled with 400 kg of granite stone, 200 kg dry sand and 0.2 m 3 of liquid 25°C water. Use properties from tables A.3 and A.4 in the textbook and use air density of 1.1 kg/m 3 . Find the average specific volume and density of the 1 m
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Unformatted text preview: volume. 4. A steel tank of cross sectional area 3 m2 and 16 m tall weighs 10 000 kg and it is open at the top. We want to float it in the ocean so it sticks 10 m straight down by pouring concrete into the bottom of it. How much concrete should I put in? 5. The main waterline into a tall building has a pressure of 90 psia at 16 ft elevation below ground level. How much extra pressure does a pump need to add to ensure a waterline pressure of 30 psia at the top floor 450 ft above ground? 16 ft 450 ft...
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