CHAPTER 14 DRILL
- D From the equation λf = v, we find that
2. C The speed of a transverse traveling wave on a stretched rope is given
by the equation v =. Therefore- D The time interval from a point moving from its maximum displacement
above y = 0 (equilibrium) to its maximum displacement below equilibrium is
equal to one-half the period of the wave. In this case
so the desired time is λ(4 s) = 2 s.- E From the equations λf = v and f = I/T, we get λ = vT = 2(cm/s)(2 s) = 4 cm.
5. E The distance between successive nodes is always equal to λ. If a
standing wave on a string fixed at both ends has a total of 4 nodes, the string
must have a length L equal to 3( λ). If L = 6 m, then λ must equal 4 m.- B We found in the previous question that λ = 4 m. Since v = 40 m/s, the
frequency of this standing wave must be