Engineering, 11.07.2019 01:10 srgrace9948
Which of the following statements about atomic vacancy sites in metals is incznrect a)- a vacancy represents the empty space in an otherwise cosed packed crystal b)- all crystalline solids contain vacancies c)-vacancy is considered as a point defect d)- vacancies play an important role in diffusion mechanisms
Answers: 3
Engineering, 04.07.2019 18:10
Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
Answers: 3
Engineering, 04.07.2019 18:20
An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid
Answers: 3
Engineering, 04.07.2019 18:20
Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um
Answers: 2
Engineering, 04.07.2019 19:10
Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?
Answers: 3
Which of the following statements about atomic vacancy sites in metals is incznrect a)- a vacancy re...
History, 16.02.2021 03:20
English, 16.02.2021 03:20
Biology, 16.02.2021 03:20
Physics, 16.02.2021 03:20
Mathematics, 16.02.2021 03:20
Business, 16.02.2021 03:20
English, 16.02.2021 03:20
Chemistry, 16.02.2021 03:20
English, 16.02.2021 03:20
History, 16.02.2021 03:20
Computers and Technology, 16.02.2021 03:20
History, 16.02.2021 03:20