Which answer below is closest to the vertical impulse due to the gravitational force exerted on the kangaroo by Earth during the short time interval while it takes off?(a)0 (b)+50N⋅s+50N⋅s (c)+150N⋅s+150N⋅s (d)−50N⋅s−50N⋅s (e)−150N⋅s−150N⋅s

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.