Question

How do i do this xxx

Answer 1

(a) A suitable apparatus for measuring the 80 cm wavelength could be a meter stick or measuring tape.

(b) The equation linking frequency (f), wavelength (λ), and wave speed (v) is: v = f λ

(c) To calculate the wave speed, we use the equation from part (b). Given a frequency of 55 Hz and a wavelength of 80 cm (or 0.8 m), the wave speed (v) is:

`$$v = 55 \, \text{Hz} * 0.8 \, \text{m} = 44 \, \text{m/s}$$`

(d) To show one complete wave without reducing the frequency when the frequency of the signal generator is increased, you could move the wooden bridge to adjust the length of the string until one complete wave is visible.

This is because the wavelength decreases when the frequency increases while the wave speed remains the same. By adjusting the length of the string, you can match the length to the new, shorter wavelength, allowing one complete wave to fit within the length of the string.