A train whistle blows every 10 seconds. What is the frequency of the whistle?

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Answer 1 · 2018-04-29T07:17:48

$0.1 Hz$

Frequency is inversely proportional to time period, so:

$T=(1/f)$

$10=(1/f)$

$f=(1/10)$

So the frequency is $(1/10) or 0.1 Hz$ .

This is because Hertz, or frequency is defined as "events per second". As there is 1 event every 10 seconds it has a frequency of $0.1 Hz$

Answer 2 · 2018-04-29T13:30:02

$0.1$ hertz

Since the train whistle blows every $10$ seconds, we can say that the period of the whistle is $10$ seconds.

Frequency is inversely proportional to period, and the equation is:

$f=1/T$

$T$ is the period in seconds

So here, the frequency will be

$f=1/(10 \ "s")$

$=0.1 \ "s"^-1$

$=0.1 \ "Hz"$