Engineering, 01.03.2021 22:00 destinyleisantos
Suppose that the transmitter has two antennas, vertically spaced by 25 cm, with the lower one at a height of 10 m. Let h1 and h2 denote the channels from the two antennas to the receiver. Let hnom be defined as in item (2.3). Plot the normalized power gains.
Answers: 3
Engineering, 04.07.2019 18:20
Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.
Answers: 2
Engineering, 04.07.2019 19:10
Agas is compressed from vi 0.3 m, p 1 bar to of v2 0.1 m3, p2--3 bar. pressure and volume are related linearly during the process. for the gas, find the work, in kj.
Answers: 2
Engineering, 04.07.2019 19:20
In the winter, in order to keep the classroom steadily at 68 f before 10 pm, heating with an average rate of 42,000 btu/hr is provided. assume the outdoor temperature maintains at 32°f, determine the electrical power (kw) required to (a) operate a reversible heat pump (b) operate a real heat pump with a cop (7) of 4.5 and (c) operate an electrical-resistance heater.
Answers: 3
Engineering, 06.07.2019 03:10
An electrical kettle is made out of stainless steel,weighs two pounds (when empty) with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling.
Answers: 1
Suppose that the transmitter has two antennas, vertically spaced by 25 cm, with the lower one at a h...
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