Meg walks with a velocity of 0.9 m/s west. she does so while riding on a train that is traveling with a velocity of 2.7 m/s east. what is megs velocity? a. 3.6 m/s west b. 1.8 m/s west c. 1.8 m/s east d. 3.6 m/s east

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

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?

How do you know how many valence electrons an atom has?