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A flow of 1.8 m3/s is carried in a rectangular channel1.6 m wide at a depth of 0.9 m. Assess whether critical depth occurat a section, and determine the downstream depth, y2,where appropriate, and the upstream depth, y1 if it isaffected, for the following 3 cases:
(a) a frictionless hump 15 cm high is installed across the bed,
(b) a frictionless sidewall constriction (with no hump) reduces thechannel width to 1.3 m; and
(c) the hump in part
(a) and the sidewall constriction in part
(b) are installed together? Show calculations to justify your answer and sketch a specific energy diagram to illustrate the process of changes in flow depth in eachcase.
For the purposes of assessing an economy's growth performance, which is the more important statistic, real GDP or nominal GDP? Why?
Double the width of the window, using widen, set the height of the window so that it is the same as the width, and set the title to the new value "Square Window".
Ethylene diamine tetra-acetic acid (EDTA) is a water-soluble compound that readily combines with metals, such as calcium, magnesium, and iron. The molecular formula for EDTA is C10N2O8H16. Assume one EDTA molecule complexes (associates with) one m..
A coal-burning steam power plant produces a net power of 300 MW with an overall thermal efficiency of 32 percent. The actual gravimetric air-fuel ratio in the furnace is calculated to be 12 kg air/kg fuel.
With the recent trend towards obesity, the manufacturer wants to change the length (but not the cross-section) so that the 6" deflection occurs when a 200 pound person stands on the end.
The owner of a dive shop wants to purchase a constant displacement air compressor capable of simultaneously filling 10 SCUBA tanks. each having a volume of 0.4 ft^3. in 20 minutes.
The container is vented to the local atmosphere. What is the absolute pressure at the surface of the mercury and at the bottom of the container. Assume the conditions of the standards atmosphere prevail for pressure. Use sg = 13.54 for the mercury..
A 30-liter volume of gas at 25 degrees C contains 12 g of methane (CH4), 1 g of nitrogen (N2), and 15 g of carbon dioxide (CO2). Calculate (a) the moles of each gas present, (b) the partial pressure exerted by each gas, and (c) the total pressure ..
the j-shaped member shown in the figure is supported by a cable de and a single journal bearing with a square shaft at
A 2005 Chrysler Town and Country MInivan has a frontal area of 2.9m2 and a drag coefficient of 0.35. A 2000 Honda Insight has a frontal area of 1.9m2 and a drag coefficient of 0.25.
A rigid 1ft^3 vessel contains R-134a originally at -20F and 27.7% quality. The refrigerant is then heated until its temperature is 100F. Calculate the heat transfer required to do this, in Btu.
A crest vertical vurve and a horizontal curve on the same highway have the same design speed. The equal-tangent vertical curve connects a +3% initial grade with a +1% final grade and has a PVC at 101+78 and a PVT at 106+72
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