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.
the thunder from a lightening flash is heard 4.2s seconds after you see the flash, if the temperature is 20deg. C, how far away was the it?
(it being the lightening)
- KennyBLv 71 month ago
The speed of sound in dry air at 20 °C is 343 m/s. So multiply 343 by 4.2 and your answer will be in meters.