The Hoover Dam, just outside of Las Vegas, Nevada, was built to provide electricity to millions of people. Water held behind the dam serves as potential energy. When water is released into tunnels down inside the dam, this potential energy is converted into kinetic energy. What is the kinetic energy of moving water converted into?

turbines spinning - mechanical energy

hot water to cold water - thermal energy

switches turning on / off - electrical energy

atoms splitting - nuclear energy