Suppose we are given the following information about a signal x[n]: 1. x[ n] is use the fourier transform analysis equation (5.9) to calculate the fourier transforms of: (a) (~)11 - 1 u[n- 1] (b) (~)ln-iia real and even signal. 2. x[n] has period n = 10 and fourier coefficients ak. 3. a11 = 5. 9 4. yo 2: : jx[nji2 = 50.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

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

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.