A bell at a railway crossing sounds with frequency of 800

A bell at a railway crossing sounds with frequency of 800

A bell at a railway crossing sounds with frequency of 800 Hz. Assume the speed ofsound in air on this day is 335 m s-1. The bell is fixed and an observer is moving awayfrom the bell on a train carriage at a speed of 50.0 m s-1 relative to the bell.a. Will the observed pitch be higher or lower than the emitted pitch?

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