Along rod of 60-mm diameter and thermophysical properties rho= 8000 kg/m3, c= 500 j/kg·k, and k= 50 w/m·k is initially at a uniform temperature and is heated in a forced convection furnace maintained at 750 k. the convection coefficient is estimated to be 1000 w/m2· k. what is the centerline temperature of the rod when the surface temperature is 550 k?

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.

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.

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