2006-06-13 09:52:29 · 10 answers · asked by GENE O 1 in Science & Mathematics ➔ Physics
The heat expands the metal in the lid at a faster rate than the glass, thereby loosening its grip slightly.
2006-06-13 09:55:41 · answer #1 · answered by BobTheBizGuru 4 · 0⤊ 0⤋
Two reasons ... occasionally there is solvent or glue or congealed contents of the jar stuck on the threads of the lid and the hot water may soften that goo, and the hot water on the jar causes the expansion of the metal lid, easing the grip of the lid on the glass jar.
Cheers.
2006-06-13 16:57:05 · answer #2 · answered by Grendle 6 · 0⤊ 0⤋
Hot water causes expansion in the molecules of the lid, causing the lid to expand and fit looser on the jar.
2006-06-13 16:56:03 · answer #3 · answered by Thomas P 2 · 0⤊ 0⤋
Jar's lid is dilated by the heat of hot water that makes it easier to open.
2006-06-13 16:57:58 · answer #4 · answered by ozlem 4 · 0⤊ 0⤋
simple thermodynamics. By applying heat to the the jar lid the molecules start to expand there by releasing the grip around the glass.
2006-06-13 16:56:10 · answer #5 · answered by Jase Mighty Pirate 3 · 0⤊ 0⤋
the metal lid expands because of the heat to loosen it and the glass does not expand at the same rate. So it make it easy to loosen the lid.
2006-06-13 17:05:58 · answer #6 · answered by steve f 1 · 0⤊ 0⤋
heat causes the metal lid to expand, therefore making it looser and easier to remove
2006-06-13 16:56:33 · answer #7 · answered by Booty 2 · 0⤊ 0⤋
It's just a mind thing. People want to do something to make things appear easier when they are capable of doing it naturally.
2006-06-13 17:02:31 · answer #8 · answered by James G 2 · 0⤊ 0⤋
because the metal or plastic top expands a little (i think!)
2006-06-13 16:55:48 · answer #9 · answered by Anonymous · 0⤊ 0⤋
burn the lid
2006-06-13 16:56:47 · answer #10 · answered by jredfearn08 4 · 0⤊ 0⤋