If frequency is kept constant, how are the velocity and wavelength of a wave related?

Answer;

Velocity and wavelength are directly proportional when frequency is kept constant.

Explanation;Frequency of a wave is the number of complete oscillations made by a given wave in one second. Wavelength on the other hand, is the distance between two successful crests or troughs in a transverse wave or two successful rarefactions or compressions in a longitudinal waves.The speed of a wave is given by the product of the frequency of a wave and the wavelength.Speed = Frequency × wavelength, Therefore, if frequency is kept constant, then the speed of a wave is directly proportional to the wavelength, such that an increase in wavelength increases the speed of the wave and vice versa.

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )