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 [ Return to question menu ] 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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