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Sting instruments. Unless you're talking about a piano type instrument with vibrating strings.
aerophones
Yes, brass instruments produce a lower pitch than woodwind instruments. Woodwind instruments use a reed to vibrate the air to produce sound, whereas brass instruments produce sound from the player's lips vibrating in a mouthpiece.
the lower the sound
By vibrating
by vibrating sound waves
by vibrating
by vibrating
A vibrating simple pendulum does not produce any sound because it oscillates at very low frequencies.
The flute is related to the physics of a vibrating column of air. The violin is related to the physics of a vibrating length of string, and the resonance of a sound box. In a drum the membrane vibrates which in turn produces sound. If I walked through an orchestra pit I'm sure I could find other instruments related to physics.
True. A vibrating string can produce a sound. This is how string instruments such as a guitars and violins work. Although such strings are made of metal (like steel wire) or plastic (like nylon), the principal is the same for all of them.
Yes, because sound is vibration. All vibrating objects will produce some sound. Even if it is decibels below our threshold.