What is the frequency of a tuning fork that resonates with an open tube 25.0Cm long and 2.0Cm in a diameter when the temperature is 20c?

To find the frequency of a tuning fork that resonates with an open tube, we can use the fundamental frequency formula for an open tube, which is given by ( f = \frac{v}{\lambda} ). The speed of sound at 20°C is approximately 343 m/s. For an open tube, the wavelength (( \lambda )) is four times the length of the tube. Therefore, the wavelength is ( 4 \times 0.25 , \text{m} = 1.0 , \text{m} ). Plugging this into the formula, the frequency is ( f = \frac{343 , \text{m/s}}{1.0 , \text{m}} = 343 , \text{Hz} ).