question number 2 Please complete your work on engineering paper. 1. e fotal kin
ID: 2073494 • Letter: Q
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question number 2
Please complete your work on engineering paper. 1. e fotal kinetic energy, in Btu, of an object with a mass of 10 thn when its velocity is 50 ft/s (KE = 0.50 Btu) 2. Electric power is to be generated by install ing a hydraulic turbine-generator at a site 120 m below eadily. the free surface of a large water reservoir that can supply water at a rate of 2400 kg/s st Determine the power generation potential. (P=E=2.83 MW) 3. n. Determine the direction of the work and heat Consider an electric refrigerator located in a roo interactions (in or out) when the following are taken as the systenm a. The contents of the refrigerator b. All parts of the refrigerator including the contents c Everything contained within the room during a winter day (Answers not provided) 4. A small electric motor produces 12 W of mechanical power. What is this power in terms of Newtons, meters, and seconds Kilo-grams, meters, and seconds (Answers not provided) a. b. 5. Water is heated in a closed pan on top of a heated stir plate. The heating element transfers 30 kJ of heat to the water. The stir magnet work is 500 N'm. Heat lost to the surrounding air is 5 kJ. Determine the final energy of the system if its initial energy is 10 kd. Erinai 35.5 k) 6. A roomis initially at 20°C. The room contain a 40-W lightbulb, a 110-W TV set, a 300-W refrigerator, and a 1200-W iron. Assuming no heat transfer through the wall, determine the rate of increase of the energy content of the room when all of these electric devices are on 0 1650 W)Explanation / Answer
mass flow rate =m= 2400kg/s
Head available= H= 120m
Power generation potential= P= mgH= 2400*9.81*120=2825280W=2.8253MW
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