If you have ever tried to unscrew a tight metal lid on a jar, and you can't, you know what happens. Either someone else does it for you, or you tap it against the counter trying to loosen it up. Well, no more having to ask for help! If you just hold the lid of the jar under hot water for one minute, it should twist right off!
How is works: Most things expand as they get warmer. When the jar is heated up, the molecules inside it expand, causing lid to loosen. Since metal is a better conductor of heat than the glass jar, it heats up much faster , giving you the upper hand on removing that stubborn lid!
Let me know if you have any other tricks of your own!
3 comments:
I will definitely try this! My mom swore by a rubber disk that she got from Ben Franklin or Lillian Vernon that was made just for twisting off stubborn jar lids-it actually worked pretty good.
Now I won't have to use my leather gloves to open jars anymore!
I love this sort of "everyday science" and the opportunities for teachable moments at home. I've known about this trick since I was little, but never would have thought about blogging about it. Great job!
I'm still a fan of banging it on the counter (or the tile floor). But it's a good science lesson anyway!
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