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Determine the 1-day BOD and ultimate BOD for a wastewater whose BOD5 at 20°C is 200 mg/L. The reaction constant k is 0.23/day. What would have been the BOD5 if the test had been conducted at 25°C, use θ = 1.056? Hint: Find for the following in this order: (a) BODu at 20°C (b) BOD1 at 20°C c. BOD5 at 25°C.
What are the x components of the average accelerations
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 5021 kg), which is made of steel (? = 7770 kg/m3). How many balls are required to float the ship
A block with mass m1 = 9.4 kg is on an incline with an angle ? = 24.0° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: ?k = 0.23 and ?s = 0.253. * When th..
A long, current-carrying solenoid with an air core has 1550 turns per meter of length and a radius of 0.0165 m. What is the mutual inductance of this system
The earth is 1.49*10^11 meters from the sun. If the solar radiation at the top of the earths atmosphere is 1340 W/m^2, what is the total power output of the sun
a pendulum clock can be approximated as a simple pendulum of length 1.48 m and keeps accurate time at a location where
Two stationary positive point charges, charge 1 of magnitude 3.50 nC and charge 2 of magnitude 1.50 nC , are separated by a distance of 31.0 cm. What is the speed (Vfinal) of the electron when it is 10.0 cm from charge 1
A standard tournament domino is 1.5 in wide and 2.5 in long. What relative speed is required
a coal-fired electric power plant has an overall efficiency of 33 and an output of 816 megawatts. how many terajoules
A 67-kg skier coasts up a snow-covered hill that makes an angle of 25° with the horizontal. The initial speed of the skier is 6.5 m/s. After coasting 1.9 m up the slope, What is the magnitude of the kinetic frictional force
Old naval ships fired 14 cannon balls from a 240 cannon. It was very important to stop the recoil of the cannon, since otherwise heavy cannon would go careening across the deck of the ship.
The concrete wall of a building is 0.10m thick. The temperature inside the building is 20.0 °C, while the temperature outside is 0°C. Heat is conducted through the wall.
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