this question is from physics from the topic mechanics of solids and fluids
2006-10-22 00:15:22 · 8 answers · asked by appu 1 in Science & Mathematics ➔ Physics
If you only have one hole, liquid will flow out slower because air will need to replace the liquid inside the can, and the same hole the liquid flows out of is where air will go in. If you have two holes, the oil can continuously flow out one whole while air continuously goes into the other hole.
And since it's oil, the hole needs to be bigger because of the higher viscosity (thickness) than water or juice.
2006-10-22 00:21:34 · answer #1 · answered by HopeURSatisfiedW/MyAnswers 3 · 1⤊ 0⤋
The answers are correct but you should know that from a physics point of view, only one hole would be needed to let the oil out of the container if it was placed within a bell jar and the air was removed producing a vacuum. The atmospheric pressure (which holds a suction cup to a window pane!) holds the oil inside the container. If a cubic inch of oil comes out a cubic inch of air must go in. That would also be true for a vacuum but a vacuum is nothing and nothing has to enter the container. Of course special oil (the kind used in vacuum pumps) would have to be used in a bell jar otherwise it might flash (evaporate) ruining the vacuum. Also, if the container is a vertical glass tube containing mercury, only one hole would be needed to drain the mercury and all but the last 30 inches would drain (leaving a vacuum above) and we would call it a barometer. A similar rig (over 34 feet of vertical garden hose) would drain cold water leaving a vacuum above 34 feet of water. A greater length of say vertical copper tube would be required if the liquid is oil because oil is (usually) less dense than water (or mercury!). All of these setups help demonstrate why a second hole is needed to drain a container of oil (atmospheric pressure wont let the oil out). Incidentally, atmospheric pressure results from the sum of the forces of millions of air molecules bombarding any surface (including the oil trying to escape the container) every second. That is of course why there is no such force in a vacuum (with no air molecules). When air enters the container, the oil is bombarded from both sides equalizing the air pressure on the contents. Physics majors need to look beyond the correct pat answer (to let air in) and understand why, even on a molecular basis. Then you can apply the general principles to other phenomenon such as syphons and suction cups.
2006-10-22 01:13:36 · answer #2 · answered by Kes 7 · 1⤊ 0⤋
Oil Tin
2016-12-18 07:32:12 · answer #3 · answered by Anonymous · 0⤊ 0⤋
One hole is to allow air into the tin so that the oil will flow out!
2006-10-22 00:17:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
One for the oil coming out and one for the air going in ! Otherwise air has to enter from the same hole and chances pf spillage will be there!
2006-10-22 00:27:05 · answer #5 · answered by gurkanji 2 · 1⤊ 1⤋
One hole is to allow air in to replace the oil being drained out.
2006-10-22 00:22:31 · answer #6 · answered by daca_moracca 3 · 1⤊ 1⤋
The second hole is to create Air Pressure, to push the liquid from first hole.
2006-10-22 00:29:08 · answer #7 · answered by Anonymous · 0⤊ 1⤋
archimedes principle or fluid displaces only when an equal amount of air/pressure is replaced by it
2006-10-22 15:58:04 · answer #8 · answered by weirdoonee 4 · 0⤊ 0⤋