the g string on a guitar is 49.0 cm long and has a fundamental frequency of 196.0 hz. a guitarist can play different notes by pushing the string against various frets, which changes the string's length. the fifth fret from the neck gives the musical note c (261.6 hz); the sixth fret gives d-flat (277.2 hz).

Guitar string is a string made of a particular material, typically, gut, nylon or steel, which is spanned over a wooden instrument or an instrument which has magnetic or piezoelectric pickups.
Many people overlook the importance and vital role of guitar strings. They help your guitar sound, play, and even feel better.
Old strings can cause intonation and tuning problems, while new strings can breathe new life into your guitar's sound and playability, keeping your guitar sounding its best.
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Hence saving memory and fast performance. More secure since we can't change the value of string object. Thread safety while working with strings in a multi-threaded environment.
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The distance that should be far apart the third and fourth frets should be Δd = 49.0 cm.

Calculation of the distance that should be far apart:

Since

The G string should be long i.e. 49 cm.

The frequency is 196 Hz

The third fret from the neck gives B is (233.08 Hz)

And, the fourth fret gives B (246.94 Hz).

So here

L3

= Length * frequency / third fret

= 49*196/233.08

= 41.20 cm

L4= Length * frequency / fourth fret

= 49*196/246.94

= 38.888 cm

So here the difference should be

= L3 - L4

= 41.20 cm - 38.888 cm

= 2.3 cm

Hence, distance that should be far apart the third and fourth frets should be Δd = 2.3 cm.

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