Engineering, 11.02.2020 00:30 caleelwittmann31
Air is initially at a temperature of 500 K and a pressure of 100 kPa. A process occurs so that the specific internal energy of the air increases by 200 kJ/kg (i. e. u2 - u1 = 200 kJ/kg). Modeling the air as an Ideal Gas, determine the final temperature assuming a) constant specific heat equal to the value at 300 K, b) constant specific heat equal to the value at the average temperature during the process, c) using third order polynomial expression table A-2c, d) variable specific heat by using properties on Table A-17.
Answers: 3
Engineering, 04.07.2019 18:10
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
Air is initially at a temperature of 500 K and a pressure of 100 kPa. A process occurs so that the s...
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