Which example shows a population of organisms? a. a single monkey b. a group of tree monkeys c. a group of tree monkeys and a cluster of trees d. a group of tree monkeys, a cluster of trees, a pile of rocks, and a fierce wind

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?