Why when you move from the longer bars to the shorter bars on a xylophone the pitch of the sound rises?

As you move from longer bars to shorter bars on a xylophone, the pitch of the sound rises because shorter bars vibrate at higher frequencies. The frequency of a vibrating object is inversely related to its length; shorter lengths lead to faster vibrations, producing higher pitches. This principle is rooted in the physics of sound, where the length of the vibrating medium directly affects the wavelength and frequency of the produced sound waves.