MCAT Physical : Wavelength, Frequency, and Period

Study concepts, example questions & explanations for MCAT Physical

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Example Questions

Example Question #161 : Ap Physics 2

Two tuning forks, with frequencies of 442Hz and 444Hz, are struck and a beat frequency is observed. What is this beat frequency?

Possible Answers:

Correct answer:

Explanation:

The beat frequency is simply the difference between two frequencies.

We are given the frequency of each tuning fork, so we can use the equation to solve for the beat frequency.

Example Question #131 : Ap Physics 2

What is the beat frequency if f1 = 200Hz and f2 = 150Hz? 

Possible Answers:

100Hz

350Hz

35Hz

50Hz

200Hz

Correct answer:

50Hz

Explanation:

Beat frequency is the difference between the two frequencies.

200Hz – 150Hz = 50Hz

Example Question #192 : Ap Physics 2

What is the frequency of a typical soundwave traveling at 340m/s with a wavelength of 40mm?

Possible Answers:

10000Hz

300Hz

8500Hz

90Hz

7500Hz

Correct answer:

8500Hz

Explanation:

Using the equation  we can find the frequency of the soundwave. 

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