A bumblebee darts past at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342 m/s. The observed frequency of the hum will be 152 Hz as the bumblebee flies away from you.

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Physics

Horn

1 July, 08:05

A bumblebee darts past at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342 m/s. The observed frequency of the hum will be 152 Hz as the bumblebee flies away from you.

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Harrison Sweeney · Answer 1

It'll be 152 Hz at the exact instant the bumblebee

is right at the tip of your nose, on his way past you.

Before he gets there, while he's coming at you,

he sounds like a frequency higher than 152 Hz.

After he passes by, and is going away from you,

he sounds like a frequency lower than 152 Hz.