Does anyone know how air and water pressure work?
139840
The formula for either is P=rho*g*h, where rho is the density of the material (mass per unit volume) and g is acceleration of gravity, and h is the depth of the material at which you are measuring the pressure. \n\nPressure is a force per unit area. If force are unbalanced, then one gets acceleration of something i.e., something moves, by Newton's second law, F=ma.
741679
What do you mean by "unload"?  An air compressor works by taking air and basically compressing it into a tank.  The amount of pressure in the tank and coming out of the lines is controlled by two different valves, the tank pressure valve and the use valve.  Both valves have limits and most equipment states how much pressure they need.  I used a compressor to spray lacquers at work.  The thicker the lacker the higher the pressure I use to make sure the lacquer spreads niceley and doesn't bubble.
431380
If the pressure is 0.76m of Hg, it is equivalent to 10.3 m of water. There is a vacuum in the tube above this water height.\n\nHowever, by “vacuum” we mean inside this space, the pressure is low. There will be vapour of water which will have some pressure.\n\nEven in mercury barometer, there will be mercury vapour inside the “Torricelli’s vacuum”.  \n\nThis is the reason that ordinary pump which sucks water from a well or sump is not able to lift water to a height more than 10m from the surface of the water.
314161
crudley you could say pressure = force/area so re arrange. if you know the presssure of the washer and you measure the area of coverage of the water then you could get a very rough estimate.
1123497
Air pressure is caused by the wight of the gasses above you, just like water pressure is caused by the weight of water overhead. The deeper you are either in water or the atmosphere the more weight of gasses or water.\n\nThe weight of all the gasses over your head at sea level is close to the weight of a compact car. You don't notice it because its the air pressure our bodies are adapted to. Just like the animals in the deep ocean don't notice all the pressure on them because it's the environment they're adapted to.
503794
They take excess moisture out of the air.  They pull in the air from one end, take out the wwater which collects in a tub (which needs to be emptied), and lets out drier air.
794147
You might work up some Q&A while showing this old demo of the effect of atm pressure...thereby adding some visual interest to the subject.\n\nAdd a few oz of water to a square-sided, metal, one-gallon can having a tightly fitted cap...bring to a vigorous boil (cap now off, please :-))..) and continue boiling until all air is expelled...screw cap in place and allow to cool...they will see the can collapse.\n\nWork up questions about the vacuum thus created (by the condensation of the water vapor) allowing atm pressure to exert its force.
1126325
It's similar to the Venturi Principle, where the jet creates a vacuum effect as it punches a "hole" through the air above the water. Since nature proverbially abhors a vacuum, the surrounding air and the water beneath the hole rush to fill it.\n\nYou can create a similar effect by directing the stream from a compressed air blower between two parallel pieces of streamer material. You would think that the pieces of crepe paper would split away from one another; actually, they tend to come together.
900569
No, air pressure is applied in all directions. Down, as well as up. The downward air pressure is negated by the equal upwards pressure.
605393
The pressure against the wall is equal to the weight of the water above it. If you are measuring pressure in pounds per square inch, the pressure at a given depth is the weight of a column of water 1 inch by 1 inch by the depth.\n\nYour explanation of what the solution should be makes no sense whatsoever. You cannot provide a proof of a pressure principle with electronics.
45614
It's to do with humidity of the air. If you watch the weather report you may notice that humidity is expressed as a percentage. This is how 'full' the air is with water vapour. If the air is nearly empty (low humidity) then water will evaporate more quickly. If the air is full (high humidity) the water will evaporate more slowly (it may even receive more water from the air!).\n\nHere is the key: hot air can hold MORE water than cold air. So even if say a gallon of water is the most that some amount of air can hold, if you the air up the air will no longer be 'full' (for example it might be only 70% full, hence 70% humidity).\n\nThis is not a complete answer as I do not know everything about it. It's pretty advanced for 5th grade (I learnt about it in the 11th grade!). For more information look up EQUILIBRIUM in chemistry.
697169
The equation for power is:\n\nP = W / t\n\nwhere P is power, W is work and t is time. Assuming a perfectly efficient power harnessing system, the work provided is equal to the gravitational work done to pull the water down. \n\nA total of 2400 liters of water (2400 kg) is moved from a height of 20m down to a height of 0m, so:\n\nW = m * g * h\n\nW = (2400 kg)(9.81 m/s²)(20m)\n\nW = 470880 J\n\nThis work is provided over the course of 1 minute (60 second), so the power provided is:\n\nP = 470880 J / 60 s\n\nP = 7848 J/s = 7848 W\n\nFinally, 1 watt = 0.001 340, so 7848 W provides 10.52 hp.\n\nP = 10.52 hp\n\n\nHope that helps! :)
1151382
Technically, it is the vapor pressure of water in the air divided by the saturation pressure at a given temperature.\n\nIn plain English, it is the fraction of water in air at some temperature vs the maximum amount of water that could be in the air at that temperature.\n\nIt varies with temperature because water's vapor pressure (the amount of water that can evaporate) rises with temperature.\n\nHope that helps.
133134
Pressure is force per unit area. \n\nThe rest of your question is not clear. \n\nPressure is used to forecast weather. \n\nPressure is used to float boats. \n\nPressure is used to power steam engines. \n\nand so on.
398051
you left out a lot of info lmao.\nwhat is the humidity of the air and what presure are you talking about.\nHeat and cold are regulated by the moisture content of the air.
311098
Not very much.  The water pressure on your body would prevent you from being able to bring in air that is at normal atmospheric pressure.  You need a compressor on the surface and a hose to breath from.
610945
Bubble meters are good ways of measuring small air flow rates. They are available from scientific equipment dealers. \n\nThe meter sets up a bubble film that goes straight across a clear plastic pipe. As the air moves through the pipe, the bubble film move up the pipe. Two detectors measure the time it takes for the film to travel up the pipe a certain distance. Knowing the time difference, the distance between the detectors, and the diameter of the plastic tube gives you the flow rate.  Once you see it working, the concept is pretty simple.