In the attachment there is a density column where there is colour Question: tell me why is the red at the bottom of the density column if it is the least dense

Which bonds are found inside a water molecule

Properties seen when one one substance changes to another are known as properties

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?