A laboratory apparatus is set up to study stationary waves on a stretched wire, as shown in the diagram below.
The wavelength of the wave shown in the diagram is determined to be 160 cm160\text{ cm}160 cm. State what piece of laboratory equipment is most suitable for measuring this length directly.
Write down the wave equation that connects frequency, wavelength, and wave speed.
The string in the diagram is vibrating at a frequency of 65 Hz65\text{ Hz}65 Hz. Calculate the wave speed of this wave. Show your working.
The frequency of the signal generator is now increased. This changes the wavelength of the wave, while the wave speed remains constant. Describe how the wooden bridge should be adjusted to show exactly one complete wave at this new frequency.
A student wants to investigate how the wavelength λ\lambdaλ of a stationary wave on a stretched string depends on the frequency fff of the wave using the apparatus shown. Describe a method the student could use to carry out this investigation and obtain accurate results.