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Earth Sciences 8 Online
OpenStudy (dmantis):

According to the Doppler effect, the sound of a police car siren is_______(Louder, Quieter) and ______(Lower, Higher) pitched as it approaches the observer.

OpenStudy (neonumbrella5115):

If you would like this website explains it better than I can: https://en.wikipedia.org/wiki/Doppler_effect#Application If you still have a question after this just tell me it wasn't clear!

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