4.) The speed of a traveling wave in a string increases with an increase in the

Question

4.) The speed of a traveling wave in a string increases with an increase in the tension (longitudinal force stretching the string) in the string. Consider a wave set up on a string with a tension equal to F1 and a wave velocity v1. If the tension in the string is increased to F2, then the new wave velocity in the string v2 can be briefly characterized as

   a.) v2 = v1

   b.) v2 < v1

   c.) v2 > v1

   d.) neither (a) nor (b) nor (c) is correct                                                                    

Answer __________

5.) An open air column has a length L. The resonant frequency of the sound waves is 283.3 Hertz and there are three half wavelengths in the open air column. The velocity of the sound waves in the open air column is 340 meter/second. Determine the length L of the open air column.

   a.) 1.40 meter

   b.) 1.80 meter

   c.) 4.80 meter

   d.) 6.20 meter

Explanation / Answer

4)we know velocity v= root of (T/ mu) .with this formula we can say v2 greater than v1.(c)

5) we know for this case n = 3v/2L.therefore L=3v/2n =3×340/2×283.3 =1.8m (b)

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