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A centrifugal pump having an impeller diameter of 1 m is to be constructed so that it will supply a head rise of 200 m at a flowrate of 4.1 m3/s of water when operating at a speed of 1200 rpm. To study the characteristics of this pump, a 1/5 scale, geometrically similar model operated at the same speed is to be tested in the laboratory. Determine
(a) the required model discharge and
(b) head rise. Assume that both model and prototype operate with the same efficiency (and therefore the same flow coefficient).
Air at 20°C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance from the entrance where the hydrodynamic boundary layers meet.
crates a and b weigh 100 lb and 50 lb respectively. if they start from rest determine the their speed when t 5s. also
a 60-kg block of nickel at 5c and a 35-kg block of silver at 50c are placed in a very large lake where the water
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a new cast iron pipe is 5 km long and 15 mm diameter is used to convey water at a rate of 0.0150m3s-1. given the
a tank contains helium at 103degrees celcius and 10.9kpa gauge . the helium is heated in a process by heat transfer
the uniform disk of mass pivots freely on the cart of mass. determine the acceleration of the assembly and the angular
a large stationary brayton cycle gas-turbine power plant delivers a power output of 100000 hp to an electric generator.
If the bulk modulus for water at 70 degrees Fahrenheit is 319 kips per square inch, determine the change in pressure required to reduce its volume by 0.3%
the acceleration of a particle is defined by the relation akt2. a knowing that v-8fts when t0 and that v 8fts when t2s
Derive an expression for the instantaneous electromagnetic torque during a three phase short circuit at the terminals. Assume the stator terminals of the machine are initially open-circuited and the speed does not change during the fault.
A Dual cycle has a compression ratio of 15:1. The state at the beginning of compression is 14.4psi and 60F. The volume ratio during the constant pressure part of the heat addition process is 2:1. The pressure ratio during the constant volume heat add..
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