Engineering, 19.10.2019 05:10 yasmineeee96371
Problem 1 (10 points) a voltage source is given by v = 2cos(60t + 45o ). what is the amplitude of the voltage source? what is the frequency of the voltage source in radians/second? what is the phase of the voltage source? what is the period of the voltage source? what is the frequency of the voltage source in hz? what is the rms voltage of the voltage source?
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What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.
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Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
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Engineering, 04.07.2019 18:20
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Engineering, 06.07.2019 02:30
Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.
Answers: 3
Problem 1 (10 points) a voltage source is given by v = 2cos(60t + 45o ). what is the amplitude of th...
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