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A settling chamber is used to remove sand and grit from the influent water to a waste water treatment plant .Conditions are:
(a) What is the minimum settling velocity required for a particle to be removed by this settling chamber? Express your answer in units of cm s-1 .
(b) Assume that this or another settling chamber removes all particles having settling velocities greater or equal to 0.04 cm s-1. What is the min-imum particle diameter that would be entirely removed by such a settling chamber? Express your answer in units of µm.
Assume that the salt water has the same properties as pure water, the ambient is at 20?C, and there are no external heat transfers. With the states as shown in the table below, find the irreversibility in the throttling valve and in the condenser.
The height (in meters) of a projectile shot vertically upward from a point 2 m above ground level with an initial velocity of 24.5 m/s is h2+24.5t-4.9t^2 after t seconds. a) When does the projectile reach its maximum height? b) What is the maximum..
A roadway has a 4% grade intersecting a -7% grade at at station 18+50.00. The grades are connected by an 800 foot vertical curve. A sign is proposed to be installed at Station 15+00.00
The path of the airplane is described by the equation y=kx^2, where k=6 x 10^-4 m^-1. Provide the expression for the velocity and acceleration of the airplane when x=390m. Express the velocity in m/s and the acceleration in m/s^2.
Write a brief (No more than a few paragraphs plus the equations themselves on a) description of the three-dimensional unsteady Navier-Stokes equations as applied to water.
In prolonging a line by plunging the telescope between backsight and foresight, but not double centering, what angular error is introduced?
An electrodialysis stack is to be used to partially demineralize 100,000gal/day of advanced treated wastewater so that it can be used for reuse by an industry. the membranes are 30 x 30in., and the salt concentration is 4500mg/L. the cations an..
For the state of plane stress shown- construct mohr's circle using graph paper, determine the principle planes and principal stresses,
A 30mm pipe X 460mm rectangular duct carries air. What size square conduit is needed to transport 4m cube per sec of water at a distance of 45m and head loss of of 1.08m.
The vertical effective stress at a certain point in a loose sand is 1000lb/ft^2. If an earth quake were to occur, how much excess pore water pressure would need to develop at this point for liquefaction to occur
Lines of levels were run requiring (n) instrument setups. If the road reading for each backsight and foresight has a standard deviation of +-0.005 ft what is the standard deviation for n=40
a constant head permeability test was conducted on a clean sand sample. the diameter and length of the test specimen
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