A syringe pump is often used to pump small precise volumes of liquids. Imagine you are given a faulty syringe pump to use in the lab. The pump leaks at a rate of 15% whatever the flowrate out of the nozzle Qn. The syringe has a diameter (Ds) of 30 mm, a length of 120 mm and a nozzle diameter (Dn) of 3 mm. For your experiment, a nozzle flowrate of 1 milliliters/s is required. Answer the following questions: (a) At what rate do you need to program the plunger velocity (Vp) to ensure you achieve the targeted flowrate (in mm/s)?
(b) How long will you be able to maintain this flowrate (in min)?

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w