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wittyusername
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This will probably be obvious to most of you so my apologies in advance. Some classmates and I got into a discussion about how an automatic feeder like this (http://i.ebayimg.com/t/Auto-Refill-...QCGk~$(KGrHqEH-C0EtrFJ6qq-BLdHF((cVg~~_35.JPG ) would work. When thinking about it I had guessed that it may be similar to hydraulics where the high pressure of the column would be countered by a large surface area in the pool (where a classmate had suggested atm pressure would be part of the opposing force here).
Other classmates suggested that when the water level is low enough air can displace water (essentially creating a vacuum in the bottle). Can anyone shed light on the actual physics at play here?
Your time is much appreciated.
Other classmates suggested that when the water level is low enough air can displace water (essentially creating a vacuum in the bottle). Can anyone shed light on the actual physics at play here?
Your time is much appreciated.
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