Fill in the blanks.: it's a beautiful day and you decide to go to the beach with some friends. the sun is its nuclear energy into radiant energy in a process called nuclear fusion. then the sun its thermal energy to the sand beneath you. the hot sand its thermal energy to your feed as you run across the sand. as you cool your feet in the ocean, what you're really doing is the thermal energy from your feet to the ocean water. feeling much refreshed, you decide to join a game of beach volleyball. you watch as server her mechanical energy from her hand to the ball. the guy next to you is not paying attention and the ball smacks him in the head the ball's kinetic energy into sound energy with a "thump."