Physics, 02.08.2019 09:00, kiaraphilman2956

Pls asap will give brainlest as a fire truck approached mary, the pitch of the siren got higher. once the fire truck passed and moved away, the siren's pitch got lower. this change in pitch is because of a change in the sound wave's 1. concussion 2. frequency 3. amplitude 4. reflection

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Pls asap will give brainlest as a fire truck approached mary, the pitch of the siren got higher. o...