Propane at 0.1 mpa, 20oc enters an insulated compressor operating at steady state and exits at 0.4 mpa, 90oc. neglecting kinetic and potential energy effects, determine(a) the power required by the compressor, in kj per kg of propane flowing(b) the rate of entropy production within the compressor, in kj/k per kg of propane flowing. ans: (a)133 kj/kg (b) 0.177 kj/k-kg

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d

What ia the energy of an object because of its potential and kinetic energies

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?