HW1 - into your tank is given by the following relation...

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Department of Mechanical Science and Engineering ME 300 Thermodynamics Section D Fall 2010 Homework #1 due Friday, September 3 rd Problem 1.1 To get familiar with the SI-unit system convert the following temperatures, pressures and velocities. (a) Convert the following temperatures first into C and then into kelvin. -40 F, 0 F, 32 F, 98.6 F, 212 F, 425 F, 2066 F (b) Convert the following pressures into kPa. 14.5 lbf/in. 2 , 34 lbf/in. 2 , 110 lbf/in. 2 , 3190.8 lbf/in. 2 (c) Convert the following velocities into meter/second. 0.044 ft/s, 27 mile/h, 65 mile/h, 100 mile/h Problem 1.2 Express the following quantities in basic units of the SI unit system (e.g. m, s, kg and K) where p = pressure, v = specific volume, V = velocity, –V = Volume, ρ = density, T = temperature, m = mass and a = acceleration. s ∂p ∂ρ p · v V 2 p ρ · a V 2 a p · –V m · T Problem 1.3 A tank to hold hydrogen in a vehicle has a volume of 35 liter. (a) Plot the specific volume versus the mass (the maximum mass the tank can hold is 2.5 kg). (b) A filling station, let’s call it station #1, offers to fill your tank. The price, in dollar, of filling hydrogen
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Unformatted text preview: into your tank is given by the following relation: Price = m v · $0 . 5 Another station, station #2, also offers to fill your tank and charges $28.50 per kg of hydrogen. Plot the price versus the mass of hydrogen filled into your tank offered by both stations into one plot. What do you conclude from the plot? The plots have to be computer generated. Problem 1.4 Assuming an Airbus A380-800 is flying at 12,500 meter at a speed of 930 km/h weighing 425,000 kg. (a) Determine its energy E based on kinetic energy and potential energy. How much—in percent—does the kinetic energy contribute to the energy E? (b) Your new 60 in LCD TV consumes 350 W. How long could you operate your TV with the energy E from part (a)? Problem 1.5 Problem 1.48 from the textbook. Plot has to be computer generated. 1...
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