Answer:
The speed of the wave at the given wavelength and frequency is 60 m/s.
The given parameters;
wavelength of the wave, λ = 0.5 m
frequency of the wave, f = 120 Hz
The speed of the wave is calculated by applying general wave equation as shown below;
v = fλ
where;
v is the speed of the wave
v = 120 x 0.5
v = 60 m/s
Thus, the speed of the wave at the given wavelength and frequency is 60 m/s.
Answer:
Energy can change form, but the total amount of energy stays the same.
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Data is collected only once from a participant is not a characteristic of a longitudinal study. Thus, the correct option is A.
<h3>What is a Longitudinal study?</h3>
A Longitudinal study may be defined as a scientific approach to a specific research that involves recounted compliances of the duplicate variables over short or long periods of time.
A longitudinal study involves the collection of data from the same participants at different points in time, collection of data from a large sample size at the same time, and collection of data that can span over several years.
Therefore, the correct option for this question is A.
To learn more about Longitudinal study, refer to the link:
brainly.com/question/25681723
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