What is the principal for loss of head in vertical water line?
537660
The vertical rise must not exceed the head of water, or the riser will not work.
276362
in the unconstrained case (no floor), water from the lowest hole will reach the furtherest given enough time (vertical space to drop). With a vertical constraint (a floor), the optimal coverage will be from a hole one third the way up from the floor, not the top hole near the surface of the water, and not a hole at floor level.\n\nAlthough I really don't see how this applies to wind sailing:-)
644239
I'm assuming that you're referring to drowning with this question. The answer is none...the water is so salty that you cannot sink.
895549
suspension and floating
621241
i wouldn't recommend swimming in nature right now. a lot of debris was blown all over the place, and they're still cleaning it up. you could get hurt badly by something submerged under the water, like metal or a broken board, glass, etc.
1041459
You could be retaining water.
908061
Water always loses pressure going up, regardless of the steepness of the incline. The rate is about 15 psi per vertical foot.
216556
The water must be given as initial push to go uphill. Once the flow is established, siphoning can occur.
412802
p=F/A \n\nSo, you have the pressure of the atmosphere pluss the weight of the water above you.  Which is usually figured as a cylinder.  Hope that helps.
252262
Intake\nCompression\nPower stroke\nExhaust
689832
The object must be less dense than the fluid to float, and more dense to sink.  If it is exactly equal density, then it can be suspended.
653947
When the water supply evaporates.
678778
Waterline refers to an imaginary line marking the level to which ship or boat submerges in the water. To an observer on the ship the water appears to rise or fall against the hull of the ship.\n\nMany factors determine the waterline. A heavy ship, or one heavily laden with cargo will submerge deeper in the water. Temperature will affect the level as warm water is less buoyant than cold water. Even the salinity of the water will affect the level because freshwater is less buoyant than salty seawater.\n\nIn sailing the length of the waterline can change as the boat heels and can dynamically impact the speed of the boat.\n\n\n\nMany commercial ships have a symbol called a Load line painted on each side of the ship. This symbol, also called a International load line or Plimsoll line, marks the level to which the ship can be safely loaded. As cargo is brought on board the ship submerges and the symbol dips farther into the water.\n\nBefore these symbols were made compulsory many ships were lost due to overloading. Sometimes ships were intentionally overloaded in the hope of collecting insurance money. Ships carrying emigrants from Europe to America were also lost. Politician Samuel Plimsoll advocated for the improved safety standards and in his honor the mark bears his name.\n\nThe letters on the Plimsoll line have the following meanings:\n\n    * TF - Tropical Fresh Water\n    * F - Fresh Water\n    * T - Tropical Sea Water\n    * S - Summer Sea Water\n    * W - Winter Sea Water\n    * WNA - Winter North Atlantic
984345
The front,then it falls in the water.
924997
If you don't, some of the water will evaporate into the air, so it will seem like you "lost" some water.
174098
The speed of the river takes away bouyancy.\n\nThe greater the buoyancy, the better. For use in white water, the armhole-style life jacket is essential. The horsecollar-style should only be used on calm water. Some life jackets are designed to turn unconscious wearers face up in the water, a feature you may want to consider. For more information, write or call the Department for the pamphlet, "Safe Boating Hints on Personal Flotation Devices."
611169
Base area x height of water.