Calculate force to balance wheelbarrow

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

In a system, when potential energy decreases, then entropy also decreases. true false

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?