Why do the planets stay in their orbit around the sun?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest