Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Lv 43,591 points
Alibags
Favorite Answers46%
Answers486
Thermos Flasks?
If you put hot water in a flask, and it stays hot. Then put cold water in the flask and it stays cold.
How does the flask know which one is which?
just for fun :-)
3 AnswersPhysics1 decade ago