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Assume you were part of a team that developed software for a chemical plant, which failed, causing a serious pollution incident. Your boss is interviewed on television and states that the validation process is comprehensive and that there are no faults in the software. She asserts that the problems must be due to poor operational procedures. A newspaper approaches you for your opinion. Discuss how you should handle such an interview.
a refrigerator operates with a coefficient of performance of 4.2 and requires an electrical input of 700 w. determine
in kidney dialysis a persons blood is passed through a bath that contains several ions and molecules. the blood is
Refrigerant 134a at a flow rate of 0.5 lb/s enters a heat exchanger operating at steady state as a saturated liquid at 0 0F and exits at 20 0F. A separate air stream enters at 120 0F and exits at 77 0F. The heat exchanger is insulated such that there..
A rigid adiabatic container in a room with a barometric pressure of 100 kPa is divided into two unequal volumes as shown. V1 = 0.108 m3 and contains air (R = 0.2870 kJ/kg-K, k = 1.40) at a gauge pressure of 32 kPa and temperature of -3°C.
a 1500-kg car enter an s-curve at a with a speed of 96 kmh with brakes applied to reduce the speed to 72 kmh at a
a carnot refrigerator is maintaining foodstuffs in a refrigerated region at 2degc by rejecting heat to the atmosphere
a r-12 plant is to develop 5 tons of refrigeration. the condenser and evaporator temperature are to be 40c and -10 c
kic for the aluminum alloy used in making a structure is 45mpam0.5. if the structure contains a crack 2.5mm long what
the density and associated percent crysallinity for two nylon 66 materials are shown as follows compute the desities of
two reversible refrigeration cycles operate in series. the first cycle receives energy by heat transfer from a cold
As part of a super-critical extraction of coal, an initially evacuated cylinder is fed with steam from a line available at 20 mPa and 400 degrees C. What is the temperature in the cylinder immediately after filling? (Answer to problem is 454 degrees ..
a 10-lb block b rests as shown on a 20-lb bracket a. the coefficients of friction are us0.3 and uk0.25 between block b
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