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A thought provoking Physics question?
Suppose we have a closed container filled with liquid and peice of cork is partially floating over it. If the air is continuously pump inside the container then:
1]
If liquid is incompressiable then Cork
A)comes out
B)sink down more
C)remains constant
D)First increases then decrease
2]
If liquid is compressiable then Cork
A)comes out
B)sink down more
C)remains constant
D)First increases then decrease
Think again..
Please add reason in support of your answers.
None of the below answer combinations are correct.
@Koshka, You mean cork has to move out in first case?
I am giving time to think again.
6 Answers
- OldPilotLv 71 decade agoFavorite Answer
1) The density of the cork (assumed) and the liquid (given) remains constant ====> C
2) The density of the cork (assumed) constant and the density of liquid increases (given) ===>A
- KoshkaLv 51 decade ago
1) Since the air is constantly pumped inside the container and the liquid is incompressible, the water should rise, no? If you saw my first answer, forget it.
Edit; Third time.
This one is harder that it seems, still trying to figure out how the air can press on the liquid without displacing it, since adding air to a closed container makes the air becomes denser and presses on the rigid sides and the liquid. The liquid has to move somehow, no? The cork has to move!
Something has to give!
You now what? This is a great question!!
2) If the liquid is compressible, its surface area is strong enough to sustain all that air that is constantly pumped in, the cork should pop up and actually come out, so A
__________
Edit: (for the first case) Actually I think it shall sink a bit, since the air above is pressing on it. It would not sink to the bottom, obviously, since it is still a cork, however the air pressing on it should submerge it.
Still not sure if it will "stay put" it should be moving a bit. If what you mean by "increase then decrease" is a description of instability, then there is a tug of war between the buoyant force and the constant air input that is pressing on it.
Source(s): Coffe =) - 1 decade ago
1] I guess the pressure exerted on the surface of the liquid would force the cork up a bit. So A.
2] If the liquid is compressible its density would increase with the compression and thus the cork would rise up again. Again A i believe.
Source(s): Thats all i could think. - ?Lv 44 years ago
"Sound travels swifter in solids and as a result's extra sparkling" No - that is misguided. The sound travels swifter in solids than in air yet may be absorbed extra - distinctive frequencies are absorbed extra desirable than others, reckoning on the variety of solid. which will make it distorted and much less sparkling. comfortable solids take up heavily. that's why they're used for sound insulation. So the sound is weaker and distorted after passing by a solid (whilst in comparison with air).
