If the Coulomb attractive force between Mg2 and S2- ions at equilibrium is 1.4010 N, calculate: The net energy at minimum separation of ions assuming that the constant of the short range repulsion force is:

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

The plum pudding model of the atom states that ?

What is a costume plot? why is it important to a film or theater production?