An O2− ion moves from a region where its electric potential energy is 12.0 × 10−18 J to one where its electrical potential energy is 7.6 × 10−18 J. Use e = 1.602 × 10−19 C. a. What is the change in potential energy?
b. What is the change in electrical potential (i. e. “voltage”)?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

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