usually a neck on a bass is longer so that you can play lower notes better
It gives a deeper and "Bassier" tonal quality. Also the strings are longer because of the lower pitch of the notes that are generally played. A pitch of a string depends not only on the length but also the tension. A loose short string doesn't sound as good as a long tighter string.
there are six strings on a guitar
That depends on the guitar! On a Tenor guitar there are four strings, on a standard guitar there are six strings, and there are twelve strings on a twelve string guitar.
There are fours strings.
6 strings like a regular guitar
There are 6 strings on a folk guitar as with most guitars, except for 12 strings.
A standard classical guitar has 6 strings.
6 strings
A blues guitar has the same amount of strings as any other guitar: 6
The electric guitar has 6 strings tuned to E A D G B E
Only 6 strings.
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Six