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What is the relation between reflection and transmission coeffients of a sea wall
beam is fixed at one end, spans 21' then goes over a roller support then 6' continues to hang over. there is a point load halfway betwen the supports (10.5') and another at the far end. there is als
Four liters of water are equilibrated with a gas mixture containing carbon dioxide at a partial pressure of 0.3 atm. Henry's law constant for H2CO3* solubility is 2.0g/L-atm.
A concrete mix with a 3-inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1700 lb/yd^3 of coarse aggregate. Compute the required weight of coarse aggregate per cubic ya
A roadway has a 4% grade intersecting a -7% grade at at station 18+50.00. The grades are connected by an 800 foot vertical curve. A sign is proposed to be installed at Station 15+00.00. The bottom o
a dry cleaning establishment buys 500 gal of carbon tetrachloride every month. as a result of the dry cleaning operation, most of this is lost to the atmosphere and only 50 gal remain to be disposed
suppose a family of four, living in a home with an area of 100x5oft connects its stormwater drain to the sewer. Assume that 1in of rain falls over 1 day. what percentage increase will there be in t
A worker ties a rope oflength 12 m to he tower at A and exerts a constant force of 160 Non the rope. (a) Express the tension in each cable as a function oftheta knowing that the resultant of the ten
A channel of a rectangular section is to take a certain discharge Q at critical flow; prove that for the wetted perimeter, P=b+2y to be minimum, the water depth must be three-quarters of the width
The arrival rate at a parking lot is 6 veh/ min. Vehicles start arriving at 6: 00 P. M., and when the queue reaches 36 vehicles, service begins. If company policy is that total vehicle delay should
A pitot-static tube is used to measure the velocity at the center of the pipe. If the fluid velocity is 10 ft/s, what is the deflection on a mercury manometer connected to the pitot-static tube
A gate valve is located at the end of the pipe. If the valve is closed suddenly, determine the maximum water hammer pressure that will develop in the pipeline. The water level in the reservoir is 98
The settlement analysis for a proposed structure indicates that 6cm of settlement will occur in 4 yr and that the ultimate total settlement will be about 25cm. estimate (a) the ultimate
An open rectangular tank 1m wide and 3m long contains water to a depth of 1m. If the height of the tank sides is 1.5m, what is the maximum horizontal acceleration (along the axis of the tank) than c
Determine the force at the circular endcap and its location relative to the bottom of the pipe. If there is a hinge at the bottom, what external force would need to be applied to the top to prevent
What is the percent change from 10m to the surface. Use absolute pressure and assume standard atmospheric conditions. Would the answer change with a different system of units.
Draw the flow net for the steady state seepage flow which occurs under this wall. From the flow net determine the distribution of water pressure on the side AB of the wall and then find the resultan
The proposed 4 story reinforced concrete office building including a green roof is to be constructed. The building is confirm to IBC 2006/2009 and ACI-318-11. 1) Calculate Loads on Floor and Roof one
Vehicular access to the Toronto Island Airport now involves the use of a small ferry, capable of carrying about 8 automobiles or an equivalent number of trucks, which operates across the 150 metre w
The total length of the hose is 65 m with 200-mm diameter. The exit diameter of the nozzle is 100 mm. Take e/D for the hose as 0.0001. What power is needed from the pump on the water
An object which has a volume of 0.18 m^3 requires a force of 265 N to keep it immersed in water. If a force of 157 N is required to keep it immersed in another liquid, find the specific gravity of t
At the design flow, it is intended to have a relative depth of 0.8. At what minimum slope can it be laid such that the velocity is at least 2 ft/s at design flow and depositied solids will be scoure
The velocity of propagation, c of surface waves is assumed to depend on the water depth, y, the water density, and the acceleration due to gravity, g. Express these variables as a dimensionless grou
For each of the two cases below, determine the water pressure, pressure head, elevation head, and total head at points A, B, and C. Please solve the problem using: (a) the upper reservoir level as t
One of the wells pumps at a rate of 1240 m3/ day and the second well pumps at 850 m3/ day. If the aquifer has a transmissivity of 2000 m2/ day and a storage coefficient of 4 x 10^-4, when would the