gudon986732
gudon986732
23.05.2020 • 
Physics

A girl on her bicycle rides in a direction opposite of her dad, who is driving away in his car at 33.4 m/s . The girl's speed is 8.54 m/s as she rings the bell on her bike . her dad hears a 714Hz ringing sound , what is the frequency of the girl's bell ?

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