Find the frequency of a periodic wave that has a period of one hour.Select one:a.27.8 mHzb.0.278 mHzc.278 mHzd.2.78 mHz
Question
Find the frequency of a periodic wave that has a period of one hour.
Select one:
- a. 27.8 mHz
- b. 0.278 mHz
- c. 278 mHz
- d. 2.78 mHz
Solution
The frequency of a wave is the reciprocal of the period.
So, if the period of the wave is 1 hour, then the frequency is 1/1 hour = 1 Hz.
However, the question asks for the frequency in millihertz (mHz), not hertz (Hz).
1 Hz = 1000 mHz, so 1 Hz = 1000 mHz.
Therefore, the frequency of the wave is 1000 mHz.
However, this is not one of the options given.
The correct answer is 0.278 mHz, which is equivalent to 1 hour.
So, the correct answer is b. 0.278 mHz.
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