The water molecule is a permanent electric dipole with a dipole moment of $6.2\times {10}^{-30}\mathrm{C}\mathrm{m}$. A water molecule is aligned with an electric field of magnitude $7600\mathrm{V}/\mathrm{m}$. How much energy is required to rotate the molecule 180°?

• A. $8.2\times {10}^{-26}\mathrm{J}$
• B. $1.8\times {10}^{-25}\mathrm{J}$
• C. $2.7\times {10}^{-25}\mathrm{J}$
• D. $5.9\times {10}^{-25}\mathrm{J}$
• E. $7.0\times {10}^{-25}\mathrm{J}$
• F. $9.4\times {10}^{-26}\mathrm{J}$