If an atom has 3 protons 3 neutrons and 2 electrons what is the electrical charge of that let atom

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Which composition of water moves to begin a deepwater current?

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?