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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.
The pivot of each 120 kg seat on a Ferris wheel travels in a circle with a 10 m radius, and the Ferris wheelrotates witha rotational speed of 0.1 rad/sec. What is the interaction force between the ferris wheel framework and the seat H when angle Q..
It is desirable to produce a copper-nickel alloythat has a minimum noncold-worked tensile strength of 380 MPa(55,000 psi) and a ductility of at least 45% EL. Is such an alloypossible? If so, what must be its composition? If this is notpossible, then ..
Vehicles begin to arrive at a toll booth at eight vehicles per minute from 9 A.M. to 10 A.M. The booth opens at 9:10 A.M. and services at a rate of ten vehicles per minute until 9:40 A.M. From 9:40 A.M. until 10 A.M.
The number of flaws on a sheet of aluminum manufactured by a certain process follows a Poisson distribution. In a sample of 100m2 of aluminum, 200 flaws are counted.
A company borrowes $25000 at an interest rate of a nominal 16% per year compounded quarterly. The company desires to repay the loan in 36 equal quartely payments, with the first payment starting three months from now.
The wheel of radius r rolls without slipping and has an angular velocity w. Write an expression for the velocity of point A in terms of theta and show that the velocities of A and B are perpendicular to one another
Using the Unified Soil Classification System of the U.S. Army Corps of Engineers, classify the soil. (The fines are easy to crumble when dry and has rapid reaction when shaken.)
A dam located in a channel of rectangular cross-section which carries water flowing at a rate of 8.75m3/s. The depth of water upstream of the dam is 2.5m
Missiles designed for defense against ballistic missiles haveattained accelerations in excess of 100g's or 100 times theacceleration due to gravity. Suppose that the missile
Terry wants to purchase a used car for $8000. The dealer offered to finance the deal at 8.5% APR for 4 years with 10% down payment. Terry's bank will provide a loan at 7.8% for 3 years, but wants a 20% downpayment.
The cable that supports the bar has an effective modulus and area of 14GPa and 77mm^2 , respectively. Let the lengths be 600mm and 300mm , and the angle 50 degrees . If the permitted additional elongation of the cable is 0.20mm
The cash flow associated with landscaping and maintaining a certain monument in Washington, D.C., is $100,000 now and $50,000 every 5 years forever. Determine its perpetual equivalent annual worth
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