A String,30 Cm Long and Having a Mass of 45

question 28

Multiple Choice

A string,30 cm long and having a mass of 45 g,is attached to a 810 Hz vibrator at one end.The other end of the string is fixed and the string is kept under tension.The vibrator produces a transverse wave in the string,whose amplitude is 7.0 mm,and that propagates with a velocity of 76 m/s.The energy of the wave is absorbed at the fixed end.In this situation,the tension in the string,in SI units,is closest to:

• A)870
• B)830
• C)900
• D)940
• E)970

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