10. When a 50 N rock is suspended beneath the surface of fresh water, its apparent weight is 40 N. What volume of water must therefore be displaced? Your answer
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- When it comes to protecting coastlines from erosion, rocks are sometimes used as a barrier. In order for a rock to not be shifted by waves, it must weigh 1,000 kilograms (approximately 1 ton). How big (what volume) does the rock need to be? You are using basalt, which has a typical density of 3200 kg/m3.2/ The estimated mass from an instantaneous spill of benzene was 214 kg over 2m of the one dimension aquifer. the aquifer has hydraulic conductıvity 3*10 cm/sec, hydraulic gradient of 0.002, and the effective porosity 0.17. the longitudinal dispersion coefficient of the aquifer is 9*10* m2 /day. Calculate the maximum concentration at one year. Then, calculate the benzene concèntration after one year at two standard deviation on either side of the center mass of the plume.Calculate the overburden at 9,000 ft (in psi) assuming that the bulk-density equation in this area is given by ρb=2.06e0.00001D where, bulk density is in g/cc depth is in ft
- True or False 1. If a well is drilled into a confined aquifer, the water can rise above its level in the aquifer because of the extra hydrostatic (fluid) pressure; which is called an artesian system. The water in an artesian system will rise all the way to the ground surface. 2. In areas suffered from surface subsidence, solutions such as pumping water back underground are likely to work.Surveying1) A cistern contains a volume of 40000 liters of water (PH₂0 = 10³ kg m-3;1 liter = 1 dm³). It has a cylindrical shape with diameter 3.56 m.. Bonus: Calculate the height of the water when the cistern is completely full. OrX IN J - a) Having established that the height of water in the cistern is 4.02 m when it is completely full, if the top of the cistern is at atmospheric pressure (P calculate the pressure at the bottom of the cistern. atm =1.01 x 105 Pa), € You now start using the kitchen sink and open the faucet. Your faucet has diameter of 3.50 cm. If the velocity of the water coming out of faucet is 14.5 cms-¹, what is the volume flow rate? c) The cistern is connected to your sink via a pipe that has diameter 8.00 cm. Calculate the speed of water in that pipe. d) You fill the sink with water. You put in there a rectangular box having area of the base A = 200 cm² and mass m = 1.00 kg. What is the minimum height the box must have in order to be able to float?
- A non-artesian well is drilled in an aquifer with a fairly horizontal water table. The well (φ = 25 cm) has a discharge of 408 m3 /hr, creating a 250 m wide cone of depression. If the height/depth of the water table is 60 m and the aquifer permeability is 8 m/day, determine the drawdown. Include also diagram or drawing.10. Which of the following best describes a drain waste vent? (1) A liquid seal in the pipes carrying waste out of the house. (2) (3) (4) A pit that collects ground water. The main soil and vent stack used to maintain equal pressure in the drainage system Perforated pipes at the base of the foundation that collect ground water. 11. Rachel is looking for a floor covering suitable for outdoor use, to be placed on her backyard patio. The floor covering that would be most durable would be one that was: (1) (2) (3) (4) loomed. punched. tufted. woven. 12. What type of ceiling is most suitable in laundry areas and utility rooms? (1) Drywall (2) Celing tiles (3) Fibreglass (4) Plaster 13 The owner ofAn underground storage tank at a service station leaks into a water table. A soluble component of the fuel is detected in a public water supply well 547 m away 1 year 31 days later. What is the groundwater flow velocity?
- Calculate the absolute pressure at an ocean depth of 1.0 km. Assume that the density of Water, Pwater is 1.025 x 10^3kg / m^3and the atmospheric pressure, Patmosphere = 1.01 X 10^5 Pa. (Use: Acceleration due to gravity, g = 9.8 m / s^2)Subsurface Drainage Q.A) The drainage design of a field is drain spacing = 60 m, length of drain lines = 200 m, slope 60 cm/km, specific discharge 6 mn/day. Estimate drain diameter. Assume 75% capacity factor and clay tiles.A confined aquifer at a depth of 34.8 m is encountered during the drilling of a water well. The surface elevation of the well is 267.4 m. What must the minimum static groundwater elevation be in this well for it to be considered artesian?