At t =-2 ms, a sinusoidal voltage is known to be zero and going positive. The voltage is next zero at t = 8 ms. It is also known that the voltage is 80.9 V at t = 0. What is the frequency of v in hertz? Select the correct expression for v. v = 138 cos(100 pi t - 3 pi/10)V v = 69 sin(100 pi t - 3 pi/10) V v = 138 sin(100 pi t + 3 pi/10) V v = 69 cos(100 pi t - 3 pi/10) V v = 138 sin(100 pi t - 3 pi/10) V v = 138 cos(100 pi t + 3 pi/10) V

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 flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?