Engineering, 04.12.2019 03:31 kat353
Acontinuous-time sinusoid x(t) is sampled at 5000 hz, which is above the nyquist rate a section of 512 samples is extracted from the sampled signal x[n], for example, x[n] for 1001 < n < 1512 then a 512-point dft is computed. the resulting 512-point dft xk] is nonzero only for k = 100, and for k = 412. determine the frequency (in hz) of the continuous-time signal x(t) the answer should be a positive number, with 4 or more significant digits. you can use fixed or exponential notation (e. g., 1574.5 or 1.5745e3) frequency (hz) of x(t) insert a numerical answer
Answers: 2
Engineering, 03.07.2019 15:10
Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.
Answers: 1
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
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
Engineering, 04.07.2019 18:10
Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)
Answers: 1
Acontinuous-time sinusoid x(t) is sampled at 5000 hz, which is above the nyquist rate a section of 5...
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