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Colette Lake has a surface area of 103 ha and a mean depth of 8 m. The pH of the water is 7.6. The lake receives surface water from a lake upstream, rainfall, and diffuse groundwater input. Atmospheric inorganic N deposition is insignificant. Contaminated groundwater is the major source of inorganic N in the lake. During April, 62 mm of rainfall fell on Colette Lake. During the same month, 4.2 x 10^6 m^3 of groundwater having an inorganic N concentration of 8.4 mg/L flows into the lake at a rate of 21.00 m^3/s. The sedimentation rate for inorganic N was measured as 49 mg N/m^2*days. A river drains into the lake at a rate of 22.64 m^3/s. there are no other sources of water into or out of the lake. Calculate the steady state concentration of inorganic N into the lake.
The storativity of the Jordan Aquifer (a regional confined aquifer) is 5 x 10-4 and the porosity is 0.3. The thickness of the aquifer is 200 ft. If the head in the Jordan has been pumped down by 100 ft in recent times
A coin is tossed and a single 6-sided die is rolled. Find the probability of landing on the head side of the coin and rolling a 3 on the die.
A thin flat plate is 12 m long and 8 m wide. The air density is 1.23 kg/m3. a) What is the maximum velocity for the boundary layer to remain laminar over the entire plate (the transition occurs at the end of the plate)
A cyclone is designed with an inlet width (W) of 12.0 cm and has four effective turns. The inlet gas velocity is 15.0 m/s and the particle density is 1.70 g/cm3. (a) Estimate the particle size that will be collected with 50 % efficiency.
For a hydrology question we are given the depth of runoff and the time. We are to make a hyetograph using this information but Im not sure how to get the intensity of the rainfall from this information
This weir is to be replaced by an uncontracted horizontal weir that will maintain the same upstream depth. Determine the height of the weir if the discharge coefficient is based on the following equation: C = 1.78 * 0.22(H/p)
A full tank (3 m height) discharges water from an output pipe following the equation: W_out = A z^1/2. Calculate the time required to reduce the level to 1 m. Data: A _s = 1 m^2, A = 0.2777 kg (s m^1/2), density water = 1000 kg/m^3
A particle which moves in two-dimensional motion has coordinates given in inches by x=t^2-4t+20 and y=3sin2t, where the time t is in seconds. Determine the magnitudes of the velocity v and the acceleration a and the angle between these two vectors..
Compare the effectiveness of the zinc coating with a typical epoxy coating on reinforcement. How does the epoxy coating protect reinforcement and what happens if the coating is nicked.
An investor purchased 100 shares ofOmega common stock for 10,000. He held the stock for nine years.For the first four years he received annual end-of-year dividendsof $1,000. For the next four years he received annual dividends of$400
For determining the centroid of the area, two square segments are considered; square ABCD and square DEFG. What are the coordinates (x, y ) of the centroid of square DEFG?
The bolts have a mean diameter of 1.000 cm, normally distributed with standard deviation of 0.010 cm. The holes have a mean diameter of 1.030 cm, normally distributed with standard deviation of 0.015 cm.
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