2006-12-12 07:32:38 · 4 answers · asked by Chim Richalds 1 in Education & Reference ➔ Quotations
Air molecules are smaller than water molecules. If air can't get in, water definitely can't.
Something can be water-tight, and not air-tight, but not vice-versa.
2006-12-12 07:39:43 · answer #1 · answered by scriptorcarmina 3 · 0⤊ 0⤋
Take a zipper locking storage bag and put a cup of water inside.
seal it. It appears that with gentle handling it is both water tight and air tight. But if you place your hands as to push the air inside
the seal will likely break forcing out the water. Or you can just fluff the bag open and seal air inside and the seal will again break.
The factor is pressure. A submarine is both air tight and water tight to say over 1,000 feet. Watches usually say on the back to what depth they are waterproof, some cannot even go into the shower, most now are good for 30 meters.
A "water tight" door on a ship is well such, but if the pressure is
great the door may give way. Things that are WT or AT at sea level may not be such as at high altitude or deep in the ocean.
Skin and SCUBA divers have to have special containers to carry such as documents or such as no zip loc will be useful at
any depth.
2006-12-12 17:19:12 · answer #2 · answered by cruisingyeti 5 · 0⤊ 0⤋
I think because there is no air under water.
2006-12-12 15:35:20 · answer #3 · answered by Krupkake 3 · 0⤊ 1⤋
as metaphors they are essentially equivalent in real world settings they are different
2006-12-13 00:49:28 · answer #4 · answered by janssen411 6 · 0⤊ 0⤋