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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)?
Calculate the surface temperature of the conductor - represent the radiation heat trans- fer rates for N shields and no shields, respectively.
a workpiece is being cut at 76mmin 250 fpm and the power is found to be 2.0 kw 2.7hp. the feed is .25 mmrev .010 inrev
If the output of a gas turbine is 300 KW and its efficiency is 20 percent, what will be the heat supplied
A hollow cylindrical copper pipe is 1.50 m long and has an outside diameter of 3.50 cm and an inside diameter of 2.50 cm. How much does it weigh?
A heat pump system is being designed to maintain a temperature of 25 0C when it is 0 0C outside. Assuming the heat transfer from the walls and roof is 4,000 MJ, determine the minimum theoretical net work input required if the cold reservoir was a) th..
a 150 scale model is to be used in a towing tank to study the water motion near the bottom of a shallow channel as a
The AIGA provides a number of standard graphics for signs in the US(www.aiga.org/symbol-signs). Download and print the male and female symbols. Find their centroids and moments of inertia with units of percentage of height and width, not in.or mm.
A sliding collar of m=80Kg falls on to a flange at the bottom of a vertical rod. Calculate the height h through which the mass m should drop to produce a maximum stress in the rod of 350 Mpa. the rod has length L=2m, cross-sectional area A=250mm2, an..
1 kg of air is allowed to expand reversibly in a cylinder behind a piston in such a way that the temperature remains
What is the wavelength (in 10-15 m) of a proton traveling at 19.8% of the speed of light? An electron moves through a uniform magnetic field .
A second sample of 35 two-year-old pine trees are grown for three more years under identical conditions (soil, temperature, water) as the first group, but not fertilized. Tree growth is measured over the three- year period with the following resu..
Refrigerant-134a at 1 MPa and 100°C is throttled to a pressure of 0.8 MPa. Determine the reversible work and exergy destroyed during this throttling process. Assume the surroundings to be at 30°C.
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