Beats

[yellowmanjuu]

Two identical violin strings, when in tune and stretched with the same tension, have a fundamental frequency of 440.0 Hz. One of the strings is retuned by adjusting its tension. When this is done, 1.5 beats per second are heard when both strings are plucked simultaneously.

-By what fractional amount was the string tension changed if it was increased?

[Tide]

What exactly have you done so far on the problem?

HINT: Search the forums. An identical problem was posed and answered during the past week or so.