You are designing a supersonic inlet that uses one oblique shock followed by a normal shock and you are comparing two designs. one uses an oblique shock that turns the flow 10 degrees followed by a normal shock while the other uses an oblique shock that turns the flow 25 degrees followed by a normal shock. for a flight mach number of 2.5, which design gives the smaller drop in stagnation pressure through the two shocks?

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

On a average work day more than work place firs are reorted

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?