Carbon dioxide (CO2) expands isentropically in a piston– cylinder assembly from p1 = 200 lbf/in.2, T1 = 800°R to a final specific volume of υ2 = 1.8 ft3/lb. Determine the work, in Btu per lb of carbon dioxide, assuming the ideal gas model with
a. constant specific heat evaluated at 600°R.
b. C variable specific heat using data from IT: Interactive Thermodynamics

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

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.

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