one kg of a liquid - vapour mixture of refrigerant 134a, is contained in a pistin cylinder arrangement at a pressure of 350kpa. Intially 75% of the mass is in liquid phase. heat is transferred to the cylinder untol only one phase exists

Determine:

(A) The volume occupied by the refrigerant initially

(B) The work done

(C) The total heat transfer

On a average work day more than work place firs are reorted

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

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.