A11.9-kg object hangs in equilibrium from a string with a total length of 5.70m and a linear mass density of =0.00400kg/m. The string is wrapped around two light frictionless pulleys that are separated by a distance of d= 2.00 m.

(a) Determine the tension in the string, in newtons (N). (b) At what frequency must the string between the pulleys vibrate in order to form the standing-wave pattern shown in Figure b? Answer in Hz.

a b