A wave motion has a frequency of 5 Hz and a wavelength of 200 m - Leaving Cert Physics - Question (c) - 2005

To find the speed of the wave, we can use the formula:
$c = f imes \lambda$
where:

• $c$ is the speed of the wave,
• $f$ is the frequency, and
• $\lambda$ is the wavelength.

Given:

• Frequency ($f$) = 5 Hz
• Wavelength ($\lambda$) = 200 m

Substituting these values into the formula gives:

$c = 5 ext{ Hz} \times 200 ext{ m}$

Calculating this results in:

$c = 1000 ext{ m/s}$

Thus, the speed of the wave is 1000 m/s.