Engineering, 05.03.2020 06:50 Haven263
What is the change in the internal energy, in Btu/lbm, of air as its temperature changes from 100 to 200°F? Is there any difference if the temperature were to change from 0 to 100°F?The constant-volume specific heat of air at room temperature is cv = 0.171 Btu/lbm·R. Consider the variation of specific heat with temperature. cv = 0.1725 Btu/lbm·R at 150°F and cv = 0.1712 Btu/lbm·R at 50°F.
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Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
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Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
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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
What is the change in the internal energy, in Btu/lbm, of air as its temperature changes from 100 to...
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