Doppler and Mach
We have all had the experience of trying to figure out whether police and fire sirens are headed toward us or away. A siren coming closer will seem have a higher pitch than one going away.
KeywordsShock Wave Mach Number Doppler Effect Sound Wave Next Generation Science Standard
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
© Joan Horvath and Rich Cameron 2017