Aspeaker vibrates at a frequency of 200hz what is it's period

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

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge