The speed of a wave can be calculated by multiplying its frequency (f) by its wavelength (λ). In this case, the given frequency is 0.5 Hz and the wavelength is 10 m. Therefore, the speed (v) of the wave can be calculated as follows:
v = f × λ
v = 0.5 Hz × 10 m
v = 5 m/s
So, the speed of the wave would be 5 meters per second.