To find the frequency of a wave when given its speed and wavelength, you can use the equation:
v = λ * f
where: v = speed of the wave λ = wavelength of the wave f = frequency of the wave
In this case, the speed of the wave is given as 350 m/s, and the wavelength is given as 70 cm. However, it's important to note that the speed should be in the same units as the wavelength for accurate calculations. Let's convert the wavelength from centimeters to meters:
70 cm = 0.7 m
Now we can substitute the values into the equation:
350 m/s = 0.7 m * f
To solve for f, we rearrange the equation:
f = 350 m/s / 0.7 m
f ≈ 500 Hz
Therefore, the frequency of the wave is approximately 500 Hz.