Determine the manning coefficient for the channel
Water flows in a 5-m-wide channel with a speed of 2 m/s and a depth of 1m. The channel bottom slopes at a rate of 1 m per 1000 m. Determine the Manning coefficient for this channel.
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The Froude number changes from a subcritical value of 0.5 to a supercritical value of 3.0. Determine the channel width at 2 if it is 12 ft wide at 1.
A coil is connected to a 60 Hz ac generator with a peak emf equal to 80 V. At this frequency the coil has an impedance of 14 and a reactance of 12 . (a) What is the peak current in the coil?
A blood test indicates the presence of a particulat disease 95% of the time when the disease is actually present. The same test indicates the presence of the disease 0.5% of the time when the dsease is not present. 1% of the population actually ha
A fuel oil is analyzed and found to contain 85.0 wt% carbon, 12.0% elemental hydrogen (H), 1.7% sulfur, and the remainder noncombustible matter.
It is believed 30% of all adults are overweight. How larger sample is necessary to estimate the true proportion of adults who are overweight with a 95% confidence interval so that the margin of error of the estimate is no greater than 2 percentage
If the maximum acceleration it experiences over the course of its motion is 45 m/s^2, what are the amplitude and the velocity amplitude of its motion?
A researcher is interested in estimating the percentage of US residents without health insurance. How large a sample is needed so that the maximum margin of error of a 95% confidence interval is no greater than 1%?
Wildlife biologists are attempting to track the prevalence of rabies in Texas coyota populations. They trap and test coyotes in three widely separated counties to determine whether the prevalence, the proportion having rabies, is the same.
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