A wave has a frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
Correct: B
The speed of the wave can be calculated using the formula v = fλ, where v is the speed, f is the frequency, and λ is the wavelength. Given f = 50 Hz and λ = 10 m, we can calculate v = 50 * 10 = 500 m/s.