A Police Car Has an 800-Hz Siren

question 282

Multiple Choice

A police car has an 800-Hz siren. It is traveling at 35.0 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standing along the
Roadside. What change of frequency does the observer hear?

• A) 166 Hz
• B) 249 Hz
• C) 82 HZ
• D) 0 Hz

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Definitions:

Expulsion

Is the forcible removal of a population from a territory claimed by another population.

Conquest

The act of conquering or taking control over a place or people, usually through military force.

Racism

Is the belief that a visible characteristic of a group, such as skin colour, indicates group inferiority and justifies discrimination.

Idle No More

A Canadian grassroots movement initiated by Indigenous activists in 2012, aimed at protecting Indigenous treaty rights, improving the environment, and promoting indigenous sovereignty.