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the surfaces of two long horizontal concentric thinwalled tubes having radii of 100 and 125 mm are maintained at 300
an electric motor under steady load draws 97 amperes at 110 voltsdellivering 093kw of mechanical energywhat is the rate
100 moles of a fuel containing methane and butane is burned with 25 excess air in a furnace producing stack gas at 300
a process plant making 2000 tons per year of a product selling for 080 per lb has annual direct production costs of 2
a certain rocket has an effective exhaust velocity of 7000 ftsec it consumes 280 lbmsec of propellant mass each of
a shell-and-tube heat exchanger with one shell pass and two tube passes employs condensing steam at 1 atm on the shell
a jet of fluid hits a stationary flat plate in the manner shown belowa if there is 50 kg of fluid flowing per minute at
what is the maximum velocity if the nozzle in example 3-2 was designed to expand into a vacuum if the expansion area
construction of a variable-area conventional axisymmetric nozzle has often been considered to make the operation of a
an ideal rocket has the following characteristicsdetermine the critical pressure ratio the gas velocity at the throat
1 a certain nozzle expands a gas under isentropic conditions its chamber or nozzle entry velocity equals 90 msec its
a certain ideal rocket with a nozzle area ratio of 23 and a throat area of 5 in 2 delivers gases at k 130 and r 66
for the rocket in problem 2 calculate the specific power assuming a propulsion system dry mass of 80 kg and a duration
an earth satellite is in an elliptical orbit with the perigee at 600 km altitude and an eccentricity of e 0866
1 for a satellite cruising in a circular orbit at an altitude of 500 km determine the period of revolution the flight
in problem 5 compute the altitude and missile velocity at the time of power plant cutoff neglecting the drag of the
a small thruster has the following characteristicsdetermine the number of oxidizer and fuel injection holes and their
an insulated long vertical vented liquid oxygen tank has been sitting on the sea-level launch stand for a period of
a what should be the approximate percent ullage volume for nitrogen tetroxide tank when the vehicle is exposed to
what is the ratio of the burning area to the nozzle throat area for a solid propellant motor with these characteristics
explain how the three frequencies from problem 1 will change with combustion temperature chamber pressure chamber
a classical hybrid propulsion system has the following characteristicsdetermine initial and final thrust specific
problem 1416a major air pollution problem in combustion is the formation of no from the reaction between o2 and n2 n2
a piece of equipment originally costing 40000 was put into use 12 years ago at the time the equipment was put into use
a research reactor is operated at a power of 250 kilowatts 8 hours a day 5 days a week for 2 years a fuel element 1 of