Why is it that when you submerge a water bottle upside down into a tub of water, the water doesn't go into the bottle?
Air pressure.The water is trying to get up into the bottle from underneath, which means that the air inside has nowhere to go. As water tries to push into the bottle, it compresses the air, causing the air pressure to rise, which pushes back against the water.By the way, it isn't exactly true that water doesn't go into the bottle, a little bit of water gets into the mouth. And the deeper you take the bottle, the more it goes inside. If you were to take it to the bottom of a swimming pool, for example, you'd notice the water started to creep up inside the bottle. That's because there's more water pressure deeper down, and that pressure compresses the air more and more, making room for the water to get further and further inside. But, as long as the air has no way to escape, it's still going to be there, and will always take up some volume.Now, if you gave the air a way out, like poking a hole in the bottle, or running a straw or tube into it from the outside, you'd see the water level rise as it pushed the air out.
What property of water explains why it can travel to the top of trees?
The attraction between its own molecules and its attraction to xylem vessel walls. Cohesion and adhesion respectively. Water molecules move up by sticking to the xylem vessel walls. Water molecules above attract the molecules below and a stream flows up. These cause capillary action and it travels up. If you are an a level student you should also say water molecules can form hydrogen bonds with each other thus they have strong attraction between themselves. They can also form hydrogen bonds with cellulose xylem vessel walls.
When I drink some water through a straw and block the entrance with my tongue, what force is pulling on the part of my tongue that's in the straw?
Short version: suction in the straw which is holding up the weight of the water in the straw.Longer version: You cause the water to rise up the straw by sucking inwards. This action creates a pressure in your mouth which is lower than atmospheric pressure. Atmospheric pressure acts downwards on the surface of the water in the glass, resulting in water rising up the straw, higher pressure moving towards lower pressure via the only path possible.However, the movement of water up the straw is increasing its gravitational potential energy, and it is only the lower pressure in your mouth which keeps it there: if you allow the pressure in your mouth to equalise e.g. by opening you lips to allow atmospheric pressure in, or allowing air from your lungs back into your mouth, the water will fall down the straw again as the atmospheric pressure pushing down on the water in the straw and in the glass is the same, so there is nothing to keep it up.When you put your tongue over the end, the water in the straw really wants to be falling back down again - it would fall down if the pressure on the top of the glass in the straw, and on the top of the water in the glass were equal. However, putting your tongue on the end prevents more air coming into the straw to equalise the pressure. Your tongue is pulled in a bit because the pressure in your tongue is higher than the pressure in the straw - your tongue maintains the pressure inside the straw at a level sufficient to hold the weight of the water in the straw in place.
How does water travel upwards in pipes?
Liquids move in pipes due to differences in pressure. Let’s take a plastic straw and call it our pipe.Place the straw into a glass of water and suck on the straw. The pressure in the glass is what we call atmospheric pressure and the pressure in your mouth is less than that (a vacuum). The liquid flows upwards in our “pipe.”Fill the straw and point it upward toward the ceiling and blow into it. The water again flows upward because the pressure in your mouth is now greater than atmospheric pressure. Now, get a towel and clean up the water.In larger pipes, pressures differentials are formed by differences in elevation (a 23 foot difference in elevation is 10 pounds per square inch pressure difference) or pumps or air pressure.
Water Pressure: Why can't water be sucked to a height greater than 10 m even by a good suction pump (layman, explain in easy words)?
Hope this is simple enough:Water in a pipe that is being sucked up by a suction pump, is actually being pushed up by the air pressure.Therefore the weight of the water in the pipe cannot be stronger than the atmospheric pressure against the bottom of the water column. The forces have to be equal in order for the water to stay up. A column of water taller than 10 m is heavier than the atmospheric pressure so it just falls further down the pipe, leaving a vacuum at the top.To get the water to go higher than 10 meters, you need a positive pressure pump to push the water from the bottom instead of sucking from the top.
Strawberries is sprinkled with sugar, a few minutes later, the berries will be covered in juice. explain.?
Osmosis is movement of water molecules from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). When sugar is sprinkled on the strawberries, water is drawn out of the strawberry cells by osmosis.
Does blowing with a straw help my fish breathe?
Total waste of time. Betta can breathe oxygen from the air, but ammonia build up in an unfiltered tank tank can still kill them if you don't change the water frequently. A proper filter processes waste ammonia AND circulates the water to replenish the oxygen. The filter need not be fancy for a small lightly stocked tank. It's something you can make out of a fizzy drink bottle and connect to a simple aquarium air pump. Ian
Do you drink more when you use a straw?
Take Larger Sips through a StrawDrinking fluid using a straw is more efficient than drinking through a glass or a water bottle. When you drink using a straw, a vacuum is created. This means you are gulping down liquid only which is better than the situation when you take a normal sip and take in liquid and oxygen at the same time. This means more liquid in every of the sip and less sips until the bottle’s empty.Water Level Makes Us Drink MoreWe humans are competitive in nature. We like to compete against others and ourselves. There are some who suggests that seeing the reducing liquid level in the bottle encourages us to finish it. This is why there are many people who draw “time lines” on their water bottles, letting them monitor the water level by each end of the day.“SUCKING” CALMS USThis might seem odd to you, a straw creates a sucking action which is the oldest way to calm and cool the body and brain. As a live example you can see babies. They suck their thumb or a toy in order to keep them calm.It has a calming effect on the brain, creating a positive connection between the brain and the feeling good and taking a sip!Are you using a water bottle which has a straw mechanism? Is it helping you drink more water, more frequently? Do make us aware with your experience…
Why does water bubble up in a plastic bottle?
Plastics bottles are made by a process called Blow-molding(HDPE, PP) or Stretch Blow-molding(PET). During the blow molding process the material is heated and stretched along length and width(bidirectional) using air. This creates roughness on the inner surface of the bottle. This roughness is so small, which is difficult to feel with bare hands. Roughness on the surface acts as high(nucleation) points.Water has many dissolved gases. These dissolved gases are trapped and not visible to naked eye. Surface roughness acts as a ventilation path(or point) for trapped gas to escape from water to atmosphere. These dissolved gases which separate from water due to Hydro-scopic pressure forms in to a bubble and the same hydro-scopic pressure prevents them from coming to the top of water surface.Usually bubbles are formed in many materials, the difference is based on the surface roughness and visibility. For example glass bottles have less surface roughness than blow-molded plastic bottles. Metal bottles have same or higher surface roughness as plastic bottles, but you cannot see the bubble formation easily.
What forces the liquid up through the straw?
Suck It.This is an amazing question. I would love to answer it as my research has been more than thorough on this one, I asked this to myself sometime back. To sum it up the basic reason why this would happen is difference in air pressure. When you try pull the air out of the straw what happens is you create a low pressure region inside of the straw this means that in the current situation the air pressure which is forcing the liquid to stay inside the straw is higher than the one inside. This means that the liquid will have no other way but to go up to compensate for the pressure drop. I’m not going to leave you here. I’ll go one step further.Now the question you asked as simple as it may be is inherently very complex. What happens if you make the straw long enough and the suction on top is high enough that it creates a vacuum does it mean that the liquid will keep flowing out? What if we have a straw long enough to reach space and connect it to one of our oceans, can we drain them out? Well the answer is No, if the straw is long enough the liquid will reach up to a height that is fixed on earth it may vary depending on the density of the liquid ( for mercury it is 760 mm ). You know what now you know a way to measure atmospheric pressure (or any pressure as a matter of fact).