Refrigerant-134a enters a diffuser steadily as saturated vapor 500 kpa with a velocity of 170 m/s, and it leaves at 600 kpa and 50◦c. the refrigerant is gaining heat at a rate of 2.5 kj/s as it passes through the diffuser. if the exit area is 75 percent greater than the inlet area, determine (a) the exit velocity and (b) the mass flow rate of the refrigerant.

Experiment scenario 2: a biology student wants to conduct a study of how the amount of food affects the weight gain for mice. i have set up four cages with a mouse in each cage. fill in the boxes that would allow the biology student to complete the study correctly

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?