Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error? a) the object is an asteroid, not a dwarf planet. b) the object is a moon, not a dwarf planet. c) the object is not a dwarf planet because it travels with other objects. d) the object is not a dwarf planet because it is round.

B) The object is a moon, not a dwarf planet.

Explanation:

The object does not orbit the sun, so it eliminates the possibility that it is a planet or a dwarf planet. (The difference between a planet and a dwarf planet is that the dwarf planet has not yet cleared its orbit.)

It is also mentioned that the object is round, so the object cannot be an asteroid.

Because of the fact that the body it is round and orbits a planet, it is concluded that the object is a moon (also known as satellite) of the planet.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.