We use a straw to drink juice from a glass.what makes this possible?
Answer»
Why Do Straws Work?
Because it is really the atmosphere that is doing the pushing, the atmospheric pressure LIMITS how high water will go up a straw. At SEA level, the AIR pressure is ENOUGH to SUPPORT a column of water about thirty feet high.
Even if you could suck all the air out of a forty-foot straw, the water wouldn’t rise more than thirty feet. In space, where there isn’t any atmospheric pressure, a straw wouldn’t work at all.