The Wave Equation for a Standing Wave on a String $y ( x , t ) = 24 \cos ( 3.0 x ) \cos ( 2 t )$

Multiple Choice

The wave equation for a standing wave on a string fixed at both ends is $y ( x , t ) = 24 \cos ( 3.0 x ) \cos ( 2 t )$ cm. The distance between two successive nodes on the string is

A) 1.0 cm.
B) 2.1 cm.
C) 1.5 m.
D) 1.0 m.
E) 2.1 m.