Two dimensional motion is motion in : A) 2x the X axis

B) 2x the Y axis

C) Motion in 2x the X axis plus the Y axis

D) Motion in the X and the Y axis

True or false graphs must include scales that increase by the same amount

Explain what will happen if decomposers were apsent from a forest ecoysystem.

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?