how does the nyc water supply work from the source to the sink?
110991
The water comes from a point elevated far above the sink height (a reservoir in upstate NY).\n\nBecause its source is higher, the water will flow (downward)--even though the pipes might go 'up' a buiding. Its all about the conservation of energy laws you can learn about in physics.\n\nFrom the reservoir it is piped to the city, and it gets filtered and treated before it gets to the sink.\n\nThe sink valves hold it back until you open them, and let the force of the flow down your drain, where it goes out to the river.
653947
When the water supply evaporates.
487009
Imagine a column of water.  The pressure is higher at the bottom of the column because of all the water above it pushing down.  Now, a closed water system can be treated as a column for determining the water pressure.  You measure from the highest point that water is in the system down to the height of the place where you taking the measurement.  \n\nIf the water tower is 200 feet tall and the building is 90 feet tall, the people on the top of the building will have 110 foot column forming their water pressure.  People in the bottom of the building will have the full 200 foot tall column of water forming their water pressure.  \n\nBecause we are dealing with a fluid, the water can exert its force around corners and the column doesn't have to really be straight up and down.  It can even have u-turns and loops.  All that really matters is the height of the faucet relative to the water level in the reservoir.
257665
From the earth, from the ground, from the water company, from the faucet???\n\nWhat do you mean....
606042
While the above answer is technically correct, it is not strictly correct.  Current does always flow from drain to source, but which terminal is the drain and which terminal is the source is entirely dependent on the voltage bias.  For instance, if you have it set up one way, with a Vgs allowing a current flow, if you switch that Vgs to be from gate to the other terminal, the current will flow the opposite way, and what used to be drain will now be considered source, and vice versa.  This is because the two terminals use the same doping, unlike BJTs.  This principle is used in analog mosfets.
820437
yes, check out the following link\nhttp://www.nyc.gov/html/dsny/html/home/home.shtml
951860
It's difficult to explain without diagrams.\n\nFirst you have an air supply at about 20 psi that flows through a restrictor and a small nozzle the same size as the restrictor. There is a flapper, a small piece of metal that covers the nozzle and controls the backpressure between the nozzle and the restrictor. The pressure between the restrictor and the nozzle is controlled between 20 and 100KPa (3 to 15psi) by the position of the flapper. The position of the flapper is controlled by the input current (usuall y 4 to 20mA of 1 to 5V). Thus the input signal varies the pressure out. I havent seen any links but I will look
579279
The Corolis effect will have no influence on a thing as small as a sink. The direction the water turns depends whether the water has a slight circular motion already due to filling. It also depends on the shape and direction of the drain.\nI live near the equator and I can assure you the water does not go straight down.
702210
If you know mechanical terms, think of it like this. Your electrical circuit has become a closed fluid system (city water supply) instead.\n\nCurrent is the "mass flow rate" of electrons.\n\nVoltage is the "system pressure".\n\nYou can have a pressurized water pipe with no fluid movement (Your faucet). In an equivelant electrical circuit, you would have a Voltage (Potential) with no Current inside the "Circuit".\n\nYou can have fluid/ electrons moving through a pipe/ wire but inevitably, something has to be helping it through (a Voltage difference or a Pressure difference).\n\nTherefore:\nYou can have Voltage/Potential (a pressure) without Current (flow). But you can't have Current (flow) without some voltage (pressure difference). \n\nWhen the breaker/ switch opens, current ceases to exist. The Voltage (charge) is not reliant on the existence of a current.\n\nWhen the flow of electrons stops, current ceases to exist. Regardless of the existing Potential you can still find, the nonexistant current cannot be defined or measured.
591941
Because of the coriolis effect. However, this is 100% not true. The water could either flow clockwise, counterclockwise or straight down depending on the shape and curvature of the sink/toilet
706832
I think that the drain is usually located at the lowest point of the footing to drain water, so it doesnt matter if the water seeps OUT when the pipe is not running full.\nAs long as water can run INTO the drain when the water level at the footing is raised, the drain performs as intended.\n\nsee site\nhttp://www.askthebuilder.com/B70_French_Drain_Design.shtml
622380
In hotels the hot water circulates, at home you have to wait till the pipe from your water heater till your faucet is filled with hot water.
259804
You have a beaker with an outlet for a rubber hose that is connected to the side running water outlet. On top of the beaker you have a funnel with a piece of filter paper in it. The running water creates a slight vacuum in the beaker. According to the Ideal Gas Law, the pressure in the beaker is lower than that outside of the beaker, causing it to suck in some air in order to equalize the pressure.Now, when you put in a liquid containing solids, the liquid will get sucked through the filter paper, leaving you with the solid. Vacuum Filtration is sometimes used instead of normal filtration because of its better filtration.( Normal filtration uses gravity instead of a vacuum)
974775
water towers provide water pressure. the water is usally pumped up and when 10,000 people take a shower in the morning natural water pressure is created when water drains down from tower \nhelps water pumping stations. heavy demands\n\nhttp://www.howstuffworks.com/water.htm
183794
It's not true. The phenomenon is true but you would need massive amounts of water to see it and the toilet , sink and bathtub doesn't suffice.
312708
Depends on the building, but the actual pump is often supplied by the fire engine.  The water pipes are usually in the stairwell or just outside the stairwell.  Some buildings have their own water pumps in a basement or adjacent facility, but this can cause problems if the building is on fire.
1049180
aquifers, undergound streams, etc. anything under ground