Engineering, 14.02.2020 04:04 ItzAquaZ1449
A fatigue test is performed on rotating beam specimens where, for each rotation cycle, thespecimens experience tensile and compressive stresses of equal magnitude. The cycles-to-failureexperience with 69 specimens of 5160H steel from 1.25-in hexagonal bar stock was as follows:L 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210f 2 1 3 5 8 12 6 10 8 5 2 3 2 1 0 1 where L is the life in thousands of cycles, and f is the class frequency of failures.(a) Estimate the mean and standard deviation of the life for the population from which thesample was drawn.(b) Presuming the distribution is normal, how many specimens are predicted to fail at less than115 kcycles?
Answers: 1
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
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
Answers: 3
Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
Answers: 1
Engineering, 04.07.2019 18:10
Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer
Answers: 2
A fatigue test is performed on rotating beam specimens where, for each rotation cycle, thespecimens...
Social Studies, 15.10.2019 00:30
English, 15.10.2019 00:30
Mathematics, 15.10.2019 00:30
Mathematics, 15.10.2019 00:30
Mathematics, 15.10.2019 00:30
Mathematics, 15.10.2019 00:30
Physics, 15.10.2019 00:30