In a re-enactment of a historical battle, a cannon ball is fired with a speed of 40 m/s in the horizontal direction. It travels 22 m horizontally before hitting the ground. From what height above the ground was it fired?

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 of the following are appropriate acceleration units?

What happens to the vapor pressure of a substance when its surface area is increased at constant temperature?