What happens is that the water level will increase because of the weight of the straw and there will be also bubbles forming under the straw because of the hole in the straw....... ^__^
Adhesion produces the effect of capillary action when a straw is placed in liquid. Capillary action is liquid's ability to flow in narrow spaces without external forces like gravity.
The pressure in the straw goes to negative.[We cannot have a negative pressure - this grammar form is known as an oxymoron.]A2. The pressure in the straw is reduced, and thus the liquid is able to be drawn higher in the straw.
The straw colored liquid is called the plasma.
Air pressure within the straw.
Sabotaging a StrawPutting one or more pinholes in the straw, above the level of the liquid, will allow air to enter the straw at the top, and the liquid will not rise in the straw. To use this "sabotaged straw", merely switch ends (flip it over) so that the pinholes go under the liquid.
When you suck on a straw the pressure at the top of the straw becomes lower than the pressure at the bottom, which forces liquid up.
Solid
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when you drink through a straw you remove some of the air in the straw. because there is less air the pressure of the straw is reduced. but the atmospheric pressure on the surface of the liquid remains the same. henceforth how it helps you drink
1) Air inside the straw moves 2)Pressure inside decreases 3)Pressure of the atmosphere is greater then the Pressure inside the straw=Liquid moves up the straw!!!
Basically, you reduce the pressure in the straw. The pressure inside the straw is less than the atmospheric pressure which presses down on the liquid outside.
When you 'suck' on a straw, you reduce the air pressure inside it. This means the air pressure on the surface of the liquid outside the straw is greater - so it pushes down, which forces liquid up the straw into your mouth.