Planet A takes one year to go around the sun at a distance at a distance of one A U.. Planet B is three A U. from the sun. How many years does Planet B rake to orbit?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

J. j. thomson’s experiment disproved the theory that an atom

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.