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A wastewater sample was diluted by turbidity free water; 5ml was diluted to 250 ml. Turbidity of the diluted sample was 2.3 NTU, what is the turbidity of the original sample?
a horizontal cylindrical tank 4 ft in diameter and 10 ft long is full of water. find the work done in pumping the water to a point 4 above the top of the tank.
Ammonium (NH4+) is a weak acid with a pKa of 9.26. The dissociation is: NH+4 NH3 + H+. Calculate the mass of ammonium added to 1 L of water in order to obtain a pH of 4 at equilibrium.
If the motorist wishes to pass the light just as it turns green without having to stop, what is the required uniform deceleration of the car and what is the speed of the car as it passes the light
Two transmission belts pass over sheaves welded to an axle supported by a thrust bearing at B and a journal bearing at D. The sheaves A has a radius of 50mm, and the sheave at C has a radius of 40mm.
n ideal gas in 1.50 gallon container is at a temperature of 125 degrees Celsius and of 2.5 atmospheres. If the gas is oxygen (formula: O_2, molecular weight = 32 grams per mole), what is the amount of gas in the container in units of grams
Start from the values for the density and the kinematic viscosity of CO2 at 15o C and standard atmospheric pressure (101.3 kPa), and first determine the value of the dynamic viscosity at the same conditions.
The motor-generators installed with these pump-turbines have an efficiency of 0.85 when operating as motors and 0.91 when operating as generators. Each pump-turbine uses its own 100-m-long, 150-cm steel penstock.
A Ferris wheel with a radius of 35 feet starts from rest and undergoes an angular acceleration of 0.05 rad/s^2. Compute the magnitude of the velocity and acceleration vectors at 5 seconds for a point on the rim of the Ferris wheel.
An increment of vertical stress of150kpa compress the sample to a void ratio of1.43. What is the over consolidation ratio of the soil at the unloaded condition.
Two glass capillary tubes of inside diameters of 20 and 13 microns are used to test the capillary rise in an annular cross section .The wall thickness of each capillary is 2 microns .The smaller capillary tube is inserted in the larger one so that..
The 70 m tall tower is supported by three cables that exert forces FAB, FAC, and FAD on it. The magnitude of the force FAB is 2 kN. The x and z components of the vector sum of the forces exerted on the tower by the three cables are zero. What are ..
The packed tower was 30 cm in diameter with sampling ports located at packing depths of 0,2,4,6,8,10, and 12 meters. The loading of water to the tower was 0.039 m^3/(m^2/s), and the temperature of groundwater was 10 degrees celcius.
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