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The pressure at the interface of the troposphere and stratosphere (at 11 km) is 22.6 kPa (abs). In the first layer of the stratosphere the temperature remains constant at -56.5?C. Determine the pressure and density in this layer at an altitude of 15 km. Assume g= 9.77 m/s2 in your calculations.
the diameter of the hollow core of a solid propellant grain remains axially uniform during burning. its length is 5 m
a 25-hp 240-v 77.8-a shunt motor has an armature resstence of 0.083 ohms and a field-circuit resistance of 125 ohms.
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 wheel barrow is used to lift a 200 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 5 ft. 5. What is the ideal mechanical advantage of the system?
a 2.1-m long 0.2-cm diameter electrical wire extends across a room that is maintained at 200c. heat is generated in the
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
air at mass flow rate of 10 kgs at 1 atm 300 k point1 enters an adiabatic compressor and exists at 8 atm 600 k point 2.
a gas contained within a piston-cylinder assembly undergoes three processes in series taking the gas from state 1
a hand drill is used to drill a holbein a very hard material. because the bit is very dull it spins with out advancing.
1. an orthopedic called mend-a-bone is made of an extracellular matrix extract plasticized with glycerol mw92 to help
a rigid insulated tank contains 0.6 kg of air initially at 200 kpa 20degc. the air is stirred by a paddle wheel until
during a simple orienteering exercise a person walks 250 m south then 620 m at an angle of 30 north of east and finally
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