PhysicsLAB Worksheet
Counting Vibrations and Calculating Frequency/Period

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Directions: Count the number of waves (to the nearest ¼ of a cycle) that reside between the two points indicated on each of the following graphs.  Next use the elapsed time given for the waves to transition between the two points to determine the wave’s period and frequency.  Please make sure to box in your answers.
 
Refer to the following information for the next two questions.

1. It takes 4 seconds for the wave to travel between the two stars.
How many wavelengths separate the two starred locations? 

What was the frequency of the source that generated these waves? 

Refer to the following information for the next two questions.

2. It takes 5 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

How much time was required for the wave to travel one wavelength? That is, what was the period of the source that generated these waves? 

Refer to the following information for the next two questions.

3. It takes 1.35 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

What was the frequency of the source that generated these waves? 

Refer to the following information for the next two questions.

4. It takes 1.5 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

How much time was required for the wave to travel one wavelength? That is, what was the period of the source that generated these waves? 

Refer to the following information for the next two questions.

5. It takes 2.56 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

What was the frequency of the source that generated these waves? 

Refer to the following information for the next two questions.

6. It takes 4.6 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

How much time was required for the wave to travel one wavelength? That is, what was the period of the source that generated these waves? 

Refer to the following information for the next two questions.

7. It takes 0.24 seconds for the wave to travel between the two stars.
 
How many wavelengths separate the two starred locations? 

What was the frequency of the source that generated these waves? 




 
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William A. Hilburn
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