Final answer:
The speed of a wave with a frequency of 2Hz and a wavelength of 4m is calculated using the formula v = f × λ, resulting in a wave speed of 8 m/s.
Step-by-step explanation:
The wave's speed can be calculated by using the formula that connects wave speed (v), frequency (f), and wavelength (λ): v = f × λ. Given the frequency is 2Hz and the wavelength is 4 m, you can calculate the wave speed by multiplying these two values:
v = 2Hz × 4m = 8 m/s.
Therefore, the speed of the wave is 8 meters per second (m/s).