Engineering, 26.12.2019 05:31 yolo123321
Acontinuous random variable, x, whose probability density function is given by f(x) = ( λe−λx , if x ≥ 0 0, otherwise is said to be an exponential random variable with parameter λ denoted by x ∼ exp(λ) where λ > 0.
(a) find the c. d.f of x.
(b) suppose that the length of a phone call in minutes is an exponential random variable with parameter λ = 1 10 . if someone arrives immediately ahead of you at a public telephone booth, find the probability that you will have to wait between 10 and 20 minutes
Answers: 1
Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
Answers: 1
Engineering, 06.07.2019 02:30
Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.
Answers: 3
Engineering, 06.07.2019 03:10
Oxygen at 300 kpa and 400 k is in a closed system with an initial volume of 0.1 m3. is now compressed in a polytropic process, with exponent of n 1.2, to a temperature of 500 k. calculate: a) the boundary work done during the compression, in kj b) the heat transfer during the compression, in kj
Answers: 3
Engineering, 06.07.2019 03:20
Aload of 10kn is to be suddenly applied to the free end of a vertical rod of length 500 mm, the upper end being rigidly fixed. 190 mechanical science what should the diameter of the rod be if the maximum stress in the rod is not to exceed 100 mpa? the tensile modulus of the rod is 205 gpa.
Answers: 2
Acontinuous random variable, x, whose probability density function is given by f(x) = ( λe−λx , if x...
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