Consider the signal ( )cos(2 )xttπ=Since 푥푥(푡푡) is periodic with a fundamental period of 1, it is also periodic with a period of 푁푁 where 푁푁 is any positive integer. What are the Fourier series coefficients of 푥푥(푡푡) if we were to regard it as a periodic signal with period 3? Explain the differences or similarities of the results. Plot the FS coefficients as a function of 푘푘 and as a function of frequency.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

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