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Helium enters an adiabatic steady-state nozzle at 200kPa and 124 degrees Celsius and 10m/s. At the nozzle exit the temperature of the helium is 100 degrees Celsius and the pressure = 150 kPa.
1) Determine the velocity of the steam at the nozzle outlet.
a) 100 m/s b) 200 m/s c) 400 m/s d) 500 m/s
2) The nozzle process specifide is: (explain)
a)Reversible and adiabatic
b) Reversible because the generated entropy in the surroundings = 0
c) Impossible because the entropy of helium decreases
d) Irreversible because the entropy of helium increases
A simply supported steel beam over a 24-ft span carries a uniformly distributed dead load of 2 k/ft, including an allowance for the self-weight, and a live load of 3.5 k/ft. The steel is A992, Grade 50.
Temperature is 20°C. A constriction in the pipeline causes velocity to increase to 13 m/s within the constriction. Assuming that Bernoulli's equation applies (i.e. p + ½ ? v2 = constant), is there a chance that cavitation will occur
An observer has determined that the time headways between successive vehicles on a section of highway are exponentially distributed and that 60% of the headways between vehicles are 15 seconds or greater.
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at s=0 the driver applies the brakes hard enough to cause the car to skid. Assume that the car keeps sliding until it stops, and assume that throughout this process acceleration is a= -7.4556. compute the car's stopping distance and time.
A log that is 2 ft in diameter is to be cut into a rectangular section for use as a simply supported beam. The material is wood select structural grade (Douglas Fir) with a specific gravity of 0.017 lb/in3.
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If it absorbs 100 Joules each cycle from the hot reservoir, how much work does it do. How much heat is given off in each cycle If each cycle takes 0.5 seconds, find the power output of the engine.
Estimate daily evaporation from a lake (cm/day) using Penman's (combined) formula, given the following information: average air temperature is 28 oC, average water temperature is 15 oC, average wind speed at 8m height is 20 Km/hr
As a tide enters a river and propagates upstream, the water depth at a given location is 3.7m . At this location the tide range is 1m . If the dominant tidal compeonent has a period of 12.4 hours, estimate the peak flood tidal flow velocity at thi..
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