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

2 Answers
Apr 29, 2018

#0.1 Hz#

Explanation:

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#

Apr 29, 2018

#0.1# hertz

Explanation:

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"#