To find the speed of a wave, we can use the equation:
v = λ / T
where: v is the velocity or speed of the wave, λ is the wavelength of the wave, T is the period of the wave.
Given: Wavelength (λ) = 20 cm = 0.20 m (since 1 meter = 100 cm) Period (T) = 0.5 s
Substituting these values into the equation, we have:
v = (0.20 m) / (0.5 s)
v = 0.40 m/s
Therefore, the speed of the wave is 0.40 meters per second.