Physics Review Question

Unit: Waves
Year: 1991
Question#: 41 Question: What is the frequency of a wave if its period is 0.25 second?

(1 ) 1.0 Hz
(2 ) 0.25 Hz
(3 ) 12 Hz
(4 ) 4.0 Hz

What is this question really asking?




Explanation by: Gabriel F
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Answer 1
A) 1.0 Hz


INCORRECT

This answer is wrong. You need to know the definition or formula for a frequency in order to be able to do this problem. A hertz equals the number of cycles a wave completes per second. return to top























Answer 2
0.25 Hz

INCORRECT
This answer is wrong. You need to know the definition or formula for a frequency in order to be able to do this problem. A hertz equals the number of cycles a wave completes per second.
return to top



























Answer 3
12 Hz
INCORRECT

This answer is wrong. You need to know the definition or formula for a frequncy in order to be able to do this problem. A hertz equals the number of cycles a wave completes per second. return to top


























Answer 4
4.0 Hz

CORRECT

The formula for frequency in this situation is: F=1/T
So, when you fill the numbers into the equation it comes out as:F=1/0.25sec. 0.25 goes into 1, 4 times. So the outcome is 4.0 Hz. return to top


























What's this question really asking?

It is asking for the relationship between the frequency of a wave and the period of that wave. return to top

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