Problem 9.35: air enters the compressor of an ideal air-standard brayton cycle at 100 kpa, 300 k, with a volumetric flow rate of 5 m3/s. the turbine inlet temperature is 1400 k. for compressor pressure ratios of 6, 8, and 12, determine (a.) the thermal efficiency of the cycle. (b.) the back work ratio. (c.) the net power developed, in kw.

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An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )