Alright, so here's my wondering:
If something is water-tight is it also air-tight? or visa versa?
Idea 1: Air tight doesn't always mean water-tight because (for example) water can condense under the face of a watch that goes under water, but air doesn't flow freely in and out of the watch.
Idea 2: Water tight doesn't always mean air tight because water has a higher density than air. So there is less resistance to the less dense air and air will flow more freely than water.
Idea 3: Water tight and air tight are the same thing. If there is one there is the other. No supporting evidence.
Thoughts? Does anyone know for sure? Does it vary ever?
2007-06-14 17:32:18 · 4 answers · asked by JEBalke 2 in Science & Mathematics ➔ Other - Science
Now u see JEBalke, air-tight can mean water- tight but water-tight does not necessarily mean air tight. Ok i see your confused. Let me explain that 'watch' example u spoke about. When the watch was made there must have been some air locked in between the dial and the glass. When ur underwater the water outside is in touch with the glass of the watch. The water outside if colder than the air inside the watch(between the dial and the glass), the moisture thats present in the air trapped between the dial and the glass gets condensed on the inner surface of the glass as the the water outside is cooler than the air thats trapped( this is because air, unless 100% dry always has sum moisture in it). So its this moisture that gets condensed on the glass and not the water that ur in! Now do you get it.
Now to prove that water-tight need not be air-tight. Take a balloon. Fill it with air. Keep the balloon aside for a few days. U wud c that the balloon has considerably decreased in size because air escapes thru the small pores of the balloon thats
impassable for water(owing to higher density than air). Try the same with the same balloon filled with water instead of air. u will c that the size does not change. This proves my point. I think u now understand the difference. And Water-tight is NOT
air-tight. Hope u found this helpful
2007-06-14 17:51:26 · answer #1 · answered by Alconzy 3 · 0⤊ 0⤋
I always took air tight to mean sealed the best but then water tight must specify a depthe (pressure) to mean anything. Awatch good at 200 ft is clearly sealed well.
2007-06-14 17:37:47 · answer #2 · answered by Gene 7 · 0⤊ 0⤋
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2016-05-20 23:51:52 · answer #3 · answered by felecia 3 · 0⤊ 0⤋
I would think something that is airtight is also watertight but not the opposite?
2007-06-14 17:37:22 · answer #4 · answered by Anonymous · 1⤊ 0⤋