Engineering, 17.03.2020 02:24 farrellandnandi
Consider results of 20 randomly chosen people who have run a marathon. Their times, in minutes, are as follows: 140, 145, 151, 162, 169, 178, 182, 193, 199, 209, 218, 220, 236, 241, 258, 259, 274, 278, 286, 295.Calculate a 90% upper confidence bound in the meantime of the race. Assume distribution to be normal.
Answers: 2
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
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 18:10
Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.
Answers: 1
Consider results of 20 randomly chosen people who have run a marathon. Their times, in minutes, are...
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