Final answer:
The frequency of a wave with a wavelength of 2 meters and a velocity of 20 m/s is found using the formula v = fλ. When rearranged to solve for f, we get 10 Hz, making the correct answer A. 10 Hz.
Step-by-step explanation:
To determine the frequency of a wave with a wavelength of 2 meters and a velocity of 20 m/s, we can use the formula for wave speed, which is the product of the wave's frequency (f) and its wavelength (λ):
Velocity (v) = Frequency (f) × Wavelength (λ)
Given:
- Velocity (v) = 20 m/s
- Wavelength (λ) = 2 m
We rearrange the formula to solve for frequency (f):
f = v / λ
So, the frequency is:
f = 20 m/s / 2 m = 10 Hz
Therefore, the correct answer is:
A. 10 Hz