As shown in the figure below, Felipe walks from the house to his truck on the way to work. He walks 20m to the truck and drives another 60m in his truck for a total time of 20 seconds What is Felipe’s average velocity over the entire 20 seconds period?. (Answer using a coordinate system where rightward is positive.)

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

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

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt