The transverse displacement of a string (clamped at both ends) is given by y(x,t)=0.06sin2πx3cos120πt. All the points on the string between two consecutive nodes vibrate with:

(a) same frequency.

(b) same phase.

(c) same energy.

(d) different amplitude.

Choose the correct alternatives:

1. (a, b, d)

2. (a, c)

3. (b, d)

4. (c, d)