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The Froude number for an open channel flow of velocity U and a depth of h was defined in Chapter 5 as
(a) Calculate the value of the Froude number for a 1-m-deep channel in which the water is flowing at an average speed of 0.5 m/s.
(b) The channel shape was tested in a 1/10-scale model. What is the desirable average velocity in order to keep the same Froude number (and not change the surface-wave behavior)?
An Ocean Thermal Energy Conversion (OTEC) power plant built in Hawaii in 1987 was designed to operate between the temperature limits of 86°F at the ocean surface and 41°F at a depth of 2100 ft.
What is the communication time if the local conditions limit spacecraft visibility to elevation angles larger than = 18 degrees?
Steam in a Carnot engine is compressed adiabatically from 20 kPa to 800 kPa. The heat addition results in saturated vapor. The quality of state 1 (the initial state of the isothermal process at T(h) ) is 15%.
the environment in a certain area is 15 degrees c. plot the maximum efficiency of a nuclear power plant as a function
air enters a compressor at ambient conditions of 100kpa and 17 degc with a low velocity and exits at 1mpa 327 degc and
steam is contained in a rigid container at an initial pressure of 100 psia and 600 f. the pressure is reduced to 10
Electrical energy can be converted to heat energy with an efficiency of 100%, by sending a current through a resistor and using "Joule heating": P = I2 R. Explain how this doesn't violate the 2nd Law, which told us that the efficiency of an engine ..
Determine the point where the particle will hit the xy-plane.
a an ideal gas flows through a throttling device. does the temperature change increasedecrease or remain the same from
decay of radioactive materials can be modeled by the equation aa0ekt where a is the amount at time t a0 is the amount
a gas turbine for an automobile is designed with a regenerator. air enters the compressor of this engine at 100 kpa and
A huge reservoir of air supplies a converging-diverging nozzle with throat and exit areas of 10 cm^2 and 25 cm^2 respectively. The reservoir pressure and temperature are 150 kPa and 20C. Determine the range of back pressure over which
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