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A 10 ha site is scheduled for re-development into a low density residential housing estate. The area is currently turfed. Soil tests on samples reveal that the soil on average contains 25% clay, 10% silt, the rest, sand and 0.5% organic matter. The flow length is estimated to be 200m with an average slope of 2.5%. Erosion control practice limits erosion from 30% of the surface area only (ie no erosion occurs from 70% of the surface), and erodible areas are well compacted. Assuming that the specific energy proposed by Wischmeier and Smith (1974) is applicable, for the construction phase:
(i) Plot the pollutograph of solids runoff from the site and estimate the maximum solids concentration (g/L) for runoff from the site.
(ii) Estimate total mass of solids (kg) mobilised from the site during and after construction for the same storm event
A wire segment of length 4.75 cm carries a 3.46 A current. This wire is placed within a uniform magnetic field. find the angle between the two orientations of the wire
we dont really use our textbooks book that much but we haveproblems like what is the differnce between temperature and heat
What is the power output of the resistor R1? What is the power output of the resistor R2? What is the power output of the resistor R3?
q1. a small car of mass 831 kg is parked at the back a small truck of mass 1553 kg on a level road. the brakes of both
A horizontal force of magnitude F = 149 N is used to push a box of mass m = 5 kg from rest a distance d = 13 m up a frictionless incline with a slope q = 22°. How much work is done by the force on the box
Calculate the displacement and velocity at times of 0.500, 1.00, 1.50, 2.00 and 2.50 s for a rock thrown straight down with an initial velocity of 11.2 m/s from the Verrazano Narrows Bridge in New York City
A Carnot-efficiency engine operating between a reservoir of liquid mercury at its melting point, What is the temperature of the colder reservoir
A spherical balloon of volume 4.08 103 cm3 contains helium at a pressure of 1.21 105 Pa. How many moles of helium are in the balloon
When the electric power was turned off, the electric motor originally running at 1800 rpm comes to rest in 15.0 s. Find out the angular acceleration, the angular velocity at the end of 5.0 s, and the total angle turned through in 15.0 s.
An object located 25.0 cm from a convex mirror produces a virtual image 16 cm from the mirror. What is the magnification of the image
An electron with an initial speed of 342910 m/s is brought to rest by an electric field. What was the potential difference that stopped the electron
the motion of a very massive object is hardly affected by what would seem to be a substantial force. consider a
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