Apower cycle operating at steady state receives energy by heat transfer at a rate at 1800 k and rejects energy by heat transfer to a cold reservoir at a rate at 600 k. for each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. a. q._h = 500 kw, q._c = 100 kw b. q._h = 500 kw, w._cycle = 250 kw, q._c = 200 kwc. w_cycle = 350 kw, q._c = 150 kw d. q._h = 500 kw, q._c = 200 kw.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

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.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.