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What is the concentration of the Cd in the soil if the city of Des Moines adds 3 tons of compost/ acre-6 inches given the compost contains 50 ppm Cd. Assume there was no Cd in the soil originally. Show your calculations?
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Question: The resistivity of a wire is given by R=pL/A. Where p is the resistivity of the material, L is the length of the wire and A is the cross sectional area of the wire. a) If the diameter of the wire is .35mm calcu ...
Quesiton: A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v . Assume that the magnitude of the acceleration due to gravity is g . - What is the wo ...
Question: A thin, horizontal, 20-cm-diameter copper plate is charged to 4.0 nC . Assume that the electrons are uniformly distributed on the surface a) What is the strength of the electric field 0.1 mm above the center of ...
Question: The speed of sound in air at 20 C is 344m/s. (A) What is the wavelength of a sound wave with a frequency of 784 Hz, corresponding to the note G5on a piano? (B) How many milliseconds does each vibration take? (C ...
Question: A textbook of mass 2.09kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.120m , to a hanging book with mass 2.99kg . The system is released fro ...
A system of four particles moves along one dimension. The center of mass of the system is at rest, and the particles do not interact with any objects outside of the system. Find the velocity, v4, of particle 4 at t1 = 2. ...
Question: A student standing in a canyon yells "echo," and her voice produces a sound wave of frequency of f = 0.56 kHz. The echo takes t = 3.5s to return to the student. Assume the speed of sound through the atmosphere ...
Question: At one point in a pipeline the water's speed is 3.00 m/s and the gauge pressure is 5.00 x 10 4 Pa. Find the gauge pressure at a second point in the line, 11.0 m lower than the first, if the pipe diameter at the ...
At equator, Earths radius is about 6370 km. A plane flies in low altitude at constant speed of v=226 m/s. Plane can produce average deceleration of a=18,/s^2 when landing. How long in seconds would it take the plane to c ...
The wind blows with a speed of 31.9 m/s over the roof of your house. Assuming the air inside the house is relatively stagnant, what is the pressure difference at the roof between the inside air and the outside air? Answe ...
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