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1) The speed of a transverse wave on a string is 155 m/s when the string tension is 120 N

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1) The speed of a transverse wave on a string is 155 m/s when the string tension is 120 N. To what value must the tension be changed to raise the wave speed to 180 m/s?
2) The speed of a transverse wave on a string is 140 m/s when the string tension is 140 N. To what value must the tension be changed to raise the wave speed to 200 m/s?

3) The speed of a transverse wave on a string is 170m/s when thestring tension is 120N. To raise the wave speed to 180m/s,

tension must be changed to?????