The half-life of carbon-14 is 5,730 years. how many grams of parent material will remain from a 120-gram sample of carbon-14 after 2 half-lives?

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

Which sound characteristic is not affected by the relative motion of an object

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?