Does a cello and viola produce the same sound?

No, a cello and viola do not produce the same sound. While they are both stringed instruments in the violin family, they have different sizes, ranges, and timbres.

Size: The cello is larger than the viola, with a longer neck and body. This difference in size affects the sound, with the cello producing lower, richer tones.

Range: The cello has a lower range than the viola, with its lowest note being C2, an octave below the viola's lowest note of C3. This difference in range contributes to the cello's deeper, more resonant sound.

Timbre: The cello has a warmer, more mellow timbre compared to the viola's brighter, more penetrating sound. This difference in timbre is due to the cello's larger size, longer strings, and lower tuning.