The latent heat of vaporization of water is 2260 J/g. How much energy is released when 100 grams of water condenses from vapor at 100°C?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

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.