Air enters an insulated nozzle at 500 °R with a velocity of 100 ft/s. Theair exits the nozzle at 300 °R with a pressure of 20 lbf/in2. The area of the nozzle at the exit is 0.005 ft2. Find the mass flow rate of the air, in lbm/s. Assume air is an ideal gas with k= 1.365

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.

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.