91Ó°ÊÓ

The distance between two successive crests of a transverse wave is known as the wavelength. In this case, the wavelength (\(\text{Wavelength} \text{,}\ \text{symbol} \text{,}\ \text{denoted by}\ \text{,} \text{}, \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by}\ \text{,} \text{} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} \text{,} \text{denoted by} (\lambda\)) is given as 1.20 meters.

Frequency (\(f\)) is the number of times a specific point on the wave, such as a crest, passes a given point in a certain period of time. Here, eight crests pass in 12.0 seconds, so the frequency is the number of crests divided by the time, which calculates to \(f = \frac{8 \text{ crests}}{12.0 \text{ s}} = \frac{2}{3} \text{ Hz}\).

The wave speed (\(v\)) can be calculated using the formula \(v = f\cdot\lambda\), where \(\lambda\) is the wavelength and \(f\) is the frequency. Substituting the given values, we get \(v = \frac{2}{3} \text{ Hz} \cdot 1.20 \text{ m} = 0.80 \text{ m/s}\). Thus, the speed of the wave is 0.80 meters per second.