Engineering, 06.08.2019 18:30 laina9939
Water at 310 k and a flow rate of 4 kg/s enters an alumina tube (k=177wm k1) with an inner diameter of 0.20 m and a wall thickness of 0.02 m. air at a temperature of 390 k flows over the tube, heating it. the convection coefficients of for the water and air are 150 and 30 w m2 k-1, respectively.
Answers: 1
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
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Engineering, 04.07.2019 19:10
Which of the following is the most important advantage of a large field of view? a. allows larger areas to be examined b. relieves eyestrain c. minimizes parallax errors. d. increases precision in proportion to the in- crease in field of view
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Engineering, 04.07.2019 19:20
Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.
Answers: 1
Water at 310 k and a flow rate of 4 kg/s enters an alumina tube (k=177wm k1) with an inner diameter...
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