Which of the following has the largest gravitational potential energy a. a 10kg dog running down the street at 30mph b. a tightrope walker slowly crossing niagara falls c. a 0.02kg bullet moving down the barrel at 800mph d. a semi truck parked in a parking lot

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

What is a subatomic particle with a negative charge and very little mass?

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.