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A skydiver bails out of an airplane at 2000m above mean sea level but cannot make his parachute work at first. The skydiver weighs 70 kg and is 1.7m tall. Determined the approximate velocity at which the skydiver will fall toward the earth. Base your calculations on the assumption that the skydiver lines flat with his arms by his side creating a circular cross-section of 0.26 m diameter. To answer this question you should examine carefully the plot of drag coefficient for a 2-d cylinder from your notes, and recognize that an iterative approach to solving this problem will be required. Make any reasonable additional assumptions you need but state them clearly. Base all of your calculations on properties of air at 2000 m in the ISA.
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
thecoaster cars are lifted up the initial hill which has a height of 85 feet and released at the top of the hill with a
a tornado rips off a 100 m2 roof with a mass of 1000 kg. what is the minimum vacuum pressure needed to do that if we
a horizontal pipe has an abrupt expansion from d1 8 cm to d2 16 cm. the water velocity in the smaller section is 10
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a 200 mm diameter sight window on the wall of a furnace is losing heat at a rate of 1500 w. if the furnace is at 1200
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the open circuit voltage of a hydrogen-oxygen fuel cell operating at rtp is 0.96 v and its internal resistance is 1.2 m
consider a large plane wall of thickness l 0. 5 m. the wall surface at x 0 is insulated while the surface at x l is
Describe a specific web or mobile application's purpose. How is it used? What changes has it brought about to its users? What are some likely future uses and enhancements?
consider a rankine cycle with a single regenerative feed-water heater. the steam enters the turbine at 30 bar 400c and
Write a paper on Boyle's law and describe Compression and Combustion stroke . Also explain Charles's law and illustrate SI engine and CI engine.
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