A hummingbird’s wings beat at 25 beats per second. What is the period of the wing beating in seconds?

Question

A hummingbird’s wings beat at 25 beats per second. What is the period of the wing beating in seconds??  
A. 0.04 s  
B. 0.25 s  
C. 0.4 s  
D. 4 s

Accepted Answer

Correct Answer: (A)0.04 s. 
Rationale: The period of the wing beating is 0.04 seconds.Frequency and period are reciprocals of each other. Frequency measures how many cycles occur per second, in hertz, while the period measures the time taken for one complete cycle. With a wing-beat frequency of 25 beats per second, the time for a single beat is found by taking the reciprocal of the frequency.A) 0.04 sThe period is calculated using the relationship:period equals one divided by frequencySubstituting the given frequency gives:period equals one divided by 25 per secondperiod equals 0.04 secondsThis correctly represents the time for one wing beat.B) 0.25 sA period of 0.25 seconds would correspond to a frequency of 4 beats per second. This option confuses the given frequency with a quarter of a second rather than taking the reciprocal.C) 0.4 sA period of 0.4 seconds would imply a frequency of 2.5 beats per second. This results from a decimal placement error when inverting the frequency.D) 4 sA 4-second period corresponds to a frequency of 0.25 beats per second, which is far slower than the given wing-beat rate. This reflects reversing the numerator and denominator incorrectly.ConclusionThe period of motion is found by taking the reciprocal of the frequency. For a hummingbird wing-beat rate of 25 beats per second, the period is 0.04 seconds.

A hummingbird’s wings beat at 25 beats per second. What is the period of the wing beating in seconds?

A
0.04 s

B
0.25 s

C
0.4 s

D
4 s

The period of the wing beating is 0.04 seconds.

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A hummingbird’s wings beat at 25 beats per second. What is the period of the wing beating in seconds?

A 0.04 s B 0.25 s C 0.4 s D 4 s

The period of the wing beating is 0.04 seconds.

Topic Flashcards

Mini Quiz

Related Questions

A
0.04 s

B
0.25 s

C
0.4 s

D
4 s