You see a hot air balloon rising above a top of a hill, what is the top of the hill called? a.) delta point b.) distance system c.) coordinate system d.) reference point

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

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.

Which scientist was the first to propose the heliocentric model of the universe? a. aristotle b. isaac newton c. galileo galilei d. nicolaus copernicus