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Show that if H LPF(z) is the system function of a discrete-time low-pass filter, then the discrete-time system whose system function H(z) is given by H(z) = H LPF(-z) is a high-pass filter.
Water is pumped from a lower reservoir to a higher reservoir by a pump that provides 20 kW of shaft power. The free surface of the upper reservoir is 45 m higher than that of the lower reservoir.
an open feedwater heater operates steadily with 30 kghr of liquid water entering one inlet at 40 degcnbspand 700 kpa.
certain microalloyed steels contain small additions of vanadium or niobium that permit the grain size to be reduced to
the table below gives physical properties for three types of fibers used to reinforce polymer resins to make pmc
water is the working fluid in an ideal rankine cycle. steam enters the turbine at 1400 lbfin2 and 1000degf. the
Estimate the temperature in °C and °F at 33,000 ft, an elevation at which many commercial airplanes fly.
Part of a 1 litre pressure vessel design involves force and stress calculations for the main parts of the vessel. Since the vessel was designed and manufactured in the US before being delivered to Brisbane, those calculations were carried out to the ..
vector r is the difference between vectors t and s. if s is inclined 28 degrees from the vertical and the angle between
a piston of diameter 100 mm moves inside a cylinder of 100.1 mm diameter. find the percent decrease in force necessary
Air enters an 8” diameter pipe at atmospheric pressure at a velocity of 30 ft/s and 65 F and exits at approximately the same pressure. While in the pipe, the air passes over a heat exchanger that causes its temperature to increase by 25 F.
A 400-mm-diameter impeller of a radial-flow water pump rotates at 120rad/s and has a discharge of 0.5 m3/s. Determine the discharge for a similar pump that has an impeller diameter of 100mm and operates at 90rad/s.
consider a thermal energy reservoir at 1000 k that can supply heat at a rate of 100000 kjh. determine the exergy of
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