It takes 4.0 hrs for a farmer to irrigate a field using a 3.0 inch diameter pipe. How long will it take to irrigate the same field with a 4.0-inch diameter pipe?

Water is leaking out of an inverted conical tank at a rate of 6200 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 4.5 meters. If the water level is rising at a rate of 22 centimeters per minute when the height of the water is 4.5 meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute. cm³ min

You drill a small hole of area 0.0166 m2 near ground level on the side of a 19.8 m high, very large water tower reservoir.  How many cubic meters of water per second flows out of the hole?

A reservoir has a surface area of 50.0 km2 and an average depth of 40.0 m. What mass of water is held behind the dam?(Figure shows a view of a large reservoir—the Three Gorges Dam site on the Yangtze River in central China.)

A small water treatment plant (WTP) is pumping groundwater for further treatment for drinking water supply. The pumping rate is 150 gallons per minute (gpm). The aquifer has a thickness of 20 m, with an intrinsic permeability of 4 x 10-8 m2 and hydraulic gradient of 0.004 in the flow direction (from east to west). Assume that the aquifer is homogeneous and isotropic, in an infinite flow domain, and that the groundwater has a constant temperature of 10 . Recently, MTBE has been detected in the WTP’s influent water. Which of the following gas stations may be a possible source of contamination? Station A: 50 m west and 50 m south to the WTP. Station B: 500 m east and 300 m north to the WTP. Station C: 1000 m east and 500 m north to the WTP. Station D: 5000 m east and 800 m south to the WTP.

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 of

Many of the cities in Holland are below sea level, and the sea is held back by a series of levies, called dikes.  A story tells of a young Dutch boy named Hans Brinker, who was walking home along the dikes from school one day, and saw a small leak.  He realized this was a real problem, so he stuck his thumb in the hole and cried for help. Imagine that the hole is 10.0 feet (3.08 meters) beneath the level of the sea beyond.  How much pressure is being exerted at the hole? Hans’ thumb has a surface area of 0.895 square centimeters (Think: How many square centimeters in a square meter?).  How much force does he feel on his thumb?  Do you think that is a reasonable amount of force for a child to balance? Normally, to find the total pressure exerted, we’d have to add atmospheric pressure to the pressure exerted by the seawater.  Why do we not have to worry about that here? *Problems involving the buoyant force are Newton’s Second Law problems, and should be solved with the same process!*

On January 30, 2019, The New York Times reported that "The United States Bureau of Reclamation estimates that the Colorado River's watershed could face an annual shortfall of 3.2 million acre-feet by midcentury. That's 1.04 trillion gallons, almost half what Arizona uses per year."  (a) Verify the volume conversion between acre-feet and gallons.

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.