An SUV has a mass of 2136 kg (4700 lbs), and a popular compact car about 1179 kg (2593 lbs).The compact car gets about 40 mpg on the highway, and 30 mpg in the city.Given those values, if we assume that both vehicles extract about the same fraction of energy from a gallon of gas, we might estimate for the SUVmpg highway andmpg city.

We know the energy extraction is directly proportional to the mass and distance covered so this is…

Answered: An SUV has a mass of 2136 kg (4700…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 300°C. The water is slowly heated at constant pressure to a final state. The heat transfer for the process is 3260 kJ and kinetic and potential energy effects are negligible.Determine the final volume, in m3, and the work for the process, in kJ.
One kilogram of an ideal gas at 5.5 bar with an initial volume of 0.3 m3 expands to a final volume of 0.5 m3 in accordance with the equation pV1.3 = C. Find the work done and the heat transfer during the process. Take R = 0.287 kJ/kg-K and Cv = 0.713 kJ/kg-K.
1. A tank containing 250 kg of kerosene is to be heated from 20°C to 40 °C in 15 minutes, using 4 bar steam. The kerosene has a specific heat capacity of 2.0 kJ/kg-°C.over that temperature range. ha at 4.0 bar is 2,108.1 kJ/kg. The tank is well insulated and heat losses are negligible. Determine the rate of heat transfer required and steam flow.
Refrigerant 134a is compressed with no heat transfer in a piston–cylinder assembly from 30 lbf/in.2, 20°F to 160 lbf/in.2 The mass of refrigerant is 0.04 lb. For the refrigerant as the system, W = 0.56 Btu. Kinetic and potential energy effects are negligible. Determine the final temperature, in °F.
Argon (molar mass 40 kg/kmol) compresses reversibly in an adiabatic system from 5 bar, 25 0C to a volume of 0.2 m3. If the initial volume occupied was 0.9 m3, calculate the work input in MJ to 3 decimal places. Assume nitrogen to be a perfect gas and take cv = 0.3122 k J / k g K.
A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 60%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu. Part A * Your answer is incorrect. Determine the work for the constant-pressure process, in Btu. W12= 38.65 Btu
A cylinder-piston apparatus contains 29 kg of air at 30°C. Weights on the piston fix the initial pressure at 20 bar. Find the work done if: a. Some of the weights are quickly removed until external pressure is 5 bar. The temperature remains constant. b. Some of the weights are slowly removed until the external pressure reaches 5 bar. The temperature remains constant. c. The expansion from 20 bar to 5 bar is polytropic, with an exponent of 1.4. Note that if the gas is ideal and PV = constant, then the temperature varies as: T₂ Tv 1-n P. n-1
Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 50 lb/in², and a volume of 1.6 ft³. The gas is stirred until its temperature is 500°F. During this process heat transfer from the gas to its surroundings occurs in an amount 2.6 Btu. Assume ideal gas behavior, but do not assume constant specific heats. Kinetic and potential energy effects can be ignored. Determine the mass of the carbon dioxide, in lb, and the work, in Btu.
A fluid at 700 kPa, with a specific volume of 0.25 m³/kg and a velocity of 175 m/s, enters a device. Heat loss from the device by radiation is 23 kJ /kg. The work done by the fluid is 465 kJ /kg. The fluid exists at 136 kPa, 0.94 m³/kg, and 335 m/s. Find the change in internal energy, in kJ/s.
The fleet average fuel economy of one car-maker fails to meet the present CAFE target (27.5 mpg) by 3 mpg. As we know, this will incur a penalty of $ 165 per car. Assuming that the first owner of a typical car bought from this car-maker drives it for 100,000 miles before selling it. If the carbon footprint of gasoline is 2.9 kg/litre and 1 US gallon = 3.79 litre how much extra carbon does the car emit? 5264 kg 4894 kg 2536 kg 3625 kg
A piston–cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid–vapor mixture with a quality of 40%. Neglect kinetic and potential energy effects.Determine the work and heat transfer for each process, all in Btu.
17.Give examples for kinetic energy, potential energy, electrical energy, chemical and energy mechanical energy exists during daily life. 050E106 250E106

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