Final answer:
The speed of a wave with a wavelength of 2 meters and a frequency of 9 Hz is calculated using the wave speed formula, resulting in a wave speed of 18 m/s.
Step-by-step explanation:
To calculate the speed of a wave, you can use the formula: Speed = Wavelength × Frequency. In this case, the wavelength (λ) is 2 meters and the frequency (f) is 9 Hertz (Hz).
Speed = 2 m × 9 Hz = 18 m/s.
Therefore, the speed of the wave is 18 meters per second. This relationship between wavelength, frequency, and speed is a fundamental concept in wave mechanics.