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A ground water sample has a pH of 7.5, hardness (due to primarily Ca2+) of 100 mg/L, and an alkalinity of 250 mg/L as CaCO3(s). Is the calcite precipitating or dissolving in the pore water
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO
A spillway carries a discharge of 22.5 m^3/s with the outlet velocity of 15 m/s at a depth of .2 m. Select an adequate USBR stilling basin and determine the sequent depth, the length of the hydrauli
A 1.5m diameter barrel (concrete barrel, well-rounded entrance) that is 20 m long is installed on a slope of 2 percent. The design discharge is 9.5 m^3/s and the inlet will be submerged but not the
The door of an oven has 27.9lb weight that acts vertically through point D. The door is supported by a hinge at point A and two springs that are symmetrically located on each side of the door.
A clean glass capillary tube having a diameter of .008 in. was inserted into water with a surface tension of 0.00504 lb/ft. Calculate the height of the capillary rise in the tube.
A grain-size analysis for a uniform sand in a loose state indicated that the soil particle diameter corresponding to 10% passing on the grain-size distribution curve is 0.18 mm. Estimate the coeffic
The head difference between manometer levels was 4.9 cm during the test, and the water temperature was 20 degrees celcius. If it took 152 second for 500 ml of water to discharge, determine the soil'
The design wind speed is 15 mph at T=10C and p=0.9 bar. The efficiency of the turbine is n=20% meaning that 20% of the kinetic energy in the wind can be extracted. estimate the power in watts that c
A real estate broker charges a fixed fee of $50 plus a 6% commission on the landowner's profit. If this is uniformly distributed between 0$ and 2000$, find the probability distribution of the broker
An Air manometer is connected to each side of an orifice, with a diameter of 8 inches, in a pipe with a diamter of 12 inches. If a maximum flow rate is 5 ft^3/s, what is the deflection of the manome
(a) how many pounds of ferric chloride per million gallons are used (b) how many pounds of hydrated lime per million gallons are used, assuming a purity of 70 % CaO
After the cone of depression has achieved equilibrium, the piezometric heads at two observation wells 40 and 95 m from the pumping well are measured as 78.9 and 83.4 above sea level, respectively.
for what flowrate through the Venturi meter will cavitation begin if p1=275 kPa gage, atmospheric pressure is 101 kPa (abs) and the vapor pressure is 3,6 kPa (abs)
Draw the free-body diagram of member ABC which is supported by a smooth collar at A, rocker at B, and Find the Find the force of CD, and the force acting at point A & B
Determine the horizontal and vertical components of reaction at the supports. Neglect the thickness of the beam
a 96-in diameter cast iron pipe carries water at 60f. the head loss due friction is 1.5ft per 1000ft of pipe. what is the dischage capacity of the pipe
A computer technician can handle on average 5 service calls per day. The cost of adding a technician (C1) is $200 per day and the estimated cost of waiting per incident (C2) is $250 per day.
Determine the uniform flow depth in a trapezoidal channel with a bottom width of 8 ft and side slopes of 1 vertical to 2 horizontal. The discharge is 100 ft3/s. Manning roughness factor is 0.015 and
If the 10-lb block passes point A on the smooth track with a speed of va = 5 ft/s determine the normal reaction on the block when it reaches point b.
North City must choose between two new snow-removal machines. The SuperBlower has a $70,000 first cost, a 20 year life, and an $8000 salvage value. At the end of 9 years , it will need a major overh
a ferric chloride dosage of 40 mg/l and an equivalent dosage of lime are used to coagulate a water. (a) how many pounds of ferric chloride per million gallons are used
The in-situ bulk density of the sandy silt is 1.92 Mg/m^3 and its average water content is 13%. determine: a) the total volume of the sandy silt that must be removed from the borrow pit for constructi
Design a parshall flume to handle 24mgd in a 10ft wide channel at a downstream depth of 3 ft. If the channel floor is at elevation 65.7ft, what is the water elevation upstream of the flume
For unidirectional carbon/epoxy tape at a 60% fiber volume fraction, calculate E11 and E22. Given Ef= 211 GPa and Em =10 GPa. Calculate the fiber weight fraction. Given pf=1.95 g/cm3 and pm =1.3 g/c