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Why when you suck a air of a bottle it shrinks?
When you suck air from a bottle you create a partial vacuum and there is less air pressure in the bottle; but outside there is atmospheric pressure so it tends to collapse the bottle.
Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?
When the temperature of a confined sample of gas is reduced, the pressure is reduced. Just before you cover the bottle, the steam in it has the same pressure as the air outside the bottle. (If the steam momentarily had higher pressure, some of it ran out. If the steam momentarily had lower pressure, some air ran into the bottle.) After you cover the bottle, nothing can get in or out of it. Then you cool the steam. The pressure inside drops when the steam cools. Now the pressure of the air outside the bottle is higher than the pressure inside the bottle, and the higher pressure outside crushes the bottle. ================================================ Do you REALLY want to see something cool, and shock the other people in the house ? Take the same plastic bottle, boil some water, pour some of the boiling water into the plastic bottle, and when the bottle is full of steam, cover it up tight. Watch the water in the bottle. As soon as it STOPS boiling, shove the bottle into a dish of ice. The water inside will START boiling again ! From the explanation above, you should be able to explain this. Here's a hint: Water boils at a lower temperature when there's less pressure on top of it. Boiling water in Denver is not as hot as boiling water in Brawley, California, because Denver is at higher altitude. so the air pressure there is lower.
Why cant you just use pressurized air for water bottle rockets?
air doesn't have enough mass. water is needed for it's mass. a plastic drink bottle can't hold enough air, the pressure would be to high.
Why it is easy to remove air from balloon than from bottle?
This is because the air inside the balloon is a fairly high pressure than the atmospheric pressure air outside the balloon. On the other hand air pressure inside the glass bottle is already equal to the atmospheric pressure so it is difficult to remove air from a glass bottle.
What happens when you blow in a water bottle?
you increase the pressure
What happens when you put a balloon on a water bottle and put it in hot water?
Air inside the bottle expands when the bottle is heated. Some of it leaves the bottle until the pressure of the heated air remaining in the bottle equals the pressure of the air in the room. The balloon is then placed over the neck of the bottle and prevents any more air from entering or leaving the bottle. The air inside the bottle cools to the temperature of the ice water. The cooler air inside the bottle takes less space (volume) than it did when hot, so it sucks the balloon inside the neck of the bottle. Air pressure inside the bottle causes the balloon to stretch and enlarge until the air pressure inside the bottle, including the air in the balloon, has the same pressure as the air in the room.
How do bottle rockets fly?
The 'operator' fills the bottle with water, then pumps air into it - creating pressure. When the stopper is released, the air pressure forces the water out of the narrow opening in the bottle's neck - creating a stream powerful enough to launch the rocket into the air.
Air and water pressure for a 1.5L bottle rocket?
1:2
How do crush a bottle with ice and cold water?
As the water inside the bottle cools it uses less air pressure than the cool air outside. The results are crushing.
What causes a plastic bottle when filled with hot water to contract when a lid is placed on the top?
We have to assume that the lid does not allow air to enter the plastic bottle. When the water is hot, the air above the water is also hot. When the air cools down, its volume decreases significantly. This, in turn, causes the pressure in the bottle to decrease such that atmospheric pressureis greater than the pressure inside the bottle. This causes the bottle to contract since the force exerted on the bottle due to atmospheric pressure is greater than the force exerted on the bottle due to the air pressure inside the bottle. The volume of the bottle decreases until the pressure of the air inside becomes equal to atmospheric pressure. The changes in volume, pressure and temperature can be explained by the equation pV=nRT, where p:pressure of gas V:Volume occupied by gas n:number of moles of gas R:molar gas constant T:Thermodynamic temperature of the gas
What does changing air pressure do to an empty water bottle?
When you pour in the hot water, it takes up all of the space inside the bottle (since it is a fluid). When you pour out the hot water and quickly put on the cap the air pressure inside the bottle is less than the air pressure outside causing the bottle to implode on itself. I'm not really sure about pouring cold water on after, maybe someone knows the answer to that part. But if you try doing it you can probably figure out what the answer is! Actually: When you pour the hot water in, and then out of the bottle the air that rushes in to replace the water is warmed by the water, and the warmed sides of the bottle, causing it to expand and some air leaves the bottle. When you then cap the bottle and let it cool to room temperature the air inside contracts, but because the cap is on no air can get back in to even things out. This causes the pressure inside the bottle to drop. Because the outside air pressure is higher than that inside the bottle, the bottle will chrush in, if it is plastic, until the bottle is small enough that the two pressures are equal. Pouring cold water on the bottle just amplifies the contraction of the air inside the bottle causing an even more pronounced effect. Note that this can be hazardous if you use glass, because the glass will not bend or crush but appear normal until the pressure difference gets to high and the glass simply implodes all at once.
Why when you suck a air of a bottle it shrinks?
When you suck air from a bottle you create a partial vacuum and there is less air pressure in the bottle; but outside there is atmospheric pressure so it tends to collapse the bottle.
What happens to the pressure in a bottle of water if you press the stopper at the top down farther?
If the stopper has an airtight seal, the pressure in the bottle will increase, with the same amount of air and water confined to a smaller area.
Why does the water pressure in a bottle increase when you put your hand on the top of it?
Because your hand replaces the column of air which was 'pressing' on the content of the bottle. Your hand exerts more pressure than the air.(: :) :p P:
Why does an empty sealed bottle collapse with altitude?
Actually, an empty sealed bottle should expand slightly as altitude increases. At the altitude where the bottle is sealed, the air pressure outside the bottle is equal to the air pressure inside the bottle. When the bottle is transported to a higher altitude, the air pressure inside the bottle is greater than the air pressure outside the bottle (In other words: There are more air molecules per unit volume inside the bottle than outside). The increased air pressure inside the bottle relative to the outside pressure causes the bottle to expand slightly. An empty bottle would not collapse as altitude increases.
Why does a plastic bottle full of steam get pressed in if placed in a refrigerator?
When the temperature of a confined sample of gas is reduced, the pressure is reduced. Just before you cover the bottle, the steam in it has the same pressure as the air outside the bottle. (If the steam momentarily had higher pressure, some of it ran out. If the steam momentarily had lower pressure, some air ran into the bottle.) After you cover the bottle, nothing can get in or out of it. Then you cool the steam. The pressure inside drops when the steam cools. Now the pressure of the air outside the bottle is higher than the pressure inside the bottle, and the higher pressure outside crushes the bottle. ================================================ Do you REALLY want to see something cool, and shock the other people in the house ? Take the same plastic bottle, boil some water, pour some of the boiling water into the plastic bottle, and when the bottle is full of steam, cover it up tight. Watch the water in the bottle. As soon as it STOPS boiling, shove the bottle into a dish of ice. The water inside will START boiling again ! From the explanation above, you should be able to explain this. Here's a hint: Water boils at a lower temperature when there's less pressure on top of it. Boiling water in Denver is not as hot as boiling water in Brawley, California, because Denver is at higher altitude. so the air pressure there is lower.
Why air from hot water bottle is expelled after filling?
Because the heat from the water could in theory build up enough air pressure to cause the bottle to burst - covering the person with scalding water. Expelling all the air from the bottle before tightening the stopper reduces the risk dramatically.
