A wind turbine has a power output p when the wind speed is v. The efficiency of the wind turbine does not change. What is the wind speed at which the power output is \(\frac{p}{2}\)?

A.     \(\frac{v}{4}\)

B.     \(\frac{v}{{\sqrt 8 }}\)

C.     \(\frac{v}{2}\)

D.     \(\frac{v}{{\sqrt[3]{2}}}\)

D