Asubstance with a ph of 9 has a) no h30+ ions or oh- ions. b) more h30+ ions than oh- ions. c) more oh- ions than h30+ ions. d) the same number of h30+ ions as it does oh- ions.

What is the magnification of a real image if the image is 10.0 cm from a mirror and the object is 50.0 cm from the mirror ? use the equation m=-di/do. a. -5.0 b. 5.0 c. 0.20 d. -0.20

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body