Answer :
Final answer:
A string quartet consists of two violins, a viola, and a cello. In an orchestra, different instruments may tune to a common pitch while maintaining their unique tonal qualities. Standing waves occur in the guitar string and the air within the guitar's resonant cavity.
Explanation:
The composition of a string quartet is correctly described by option A): Two violins, viola, and cello. This ensemble typically consists of four string players, where the first violin plays the highest part, the second violin plays a lower part that complements the first, the viola adds depth with its rich and mellow tones, and the cello supports the group with the lowest part, often forming the bass foundation. Each instrument has its unique role, creating a balanced harmony that has been celebrated in chamber music for centuries.
When tuning, the members of an orchestra may tune their instruments to the same reference pitch, often provided by the oboe or a tuning device. Different instruments, like woodwind and strings, will blend their distinct sounds to achieve a harmonious ensemble.
As for standing waves, they will most likely occur in the acoustic guitar's string itself and in the air within the guitar's resonant cavity. The vibrating strings and the sounding box work together to amplify and enrich the sound produced by the guitar.
