Choose all the answers that apply. Which of the following energy forms are involved in a nuclear power plant?

heat
sound
mechanical
electrical
nuclear

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.