Final answer:
To calculate the speed of sound in a steel rail, use the formula v = f × λ. With a frequency of 660 Hz and a wavelength of 7.5 m, the speed of sound is 4950 m/s.
Step-by-step explanation:
The question asks about the calculation of the speed of sound in a steel rail using the given frequency and wavelength of a sound wave. To find the speed of sound, we use the general wave equation v = f × λ, where v is the speed, f is the frequency, and λ is the wavelength. In this case, the frequency (f) is 660 Hz and the wavelength (λ) is 7.5 m.
Applying these values to the equation provides us with the speed:
v = 660 Hz × 7.5 m = 4950 m/s.
Therefore, the speed of sound in this steel rail is 4950 meters per second.