If you pick a rock up off the ground, what is the reaction force? a. the normal force b. your hand pushing up on the rock c. the rock pressing down on your hand d. friction between the rock and your hand

Wich is not standing in the way of astronomers getting a good view of different star

Which does not describe a physical change happening to water? water evaporating in the sun water reacting with nitrogen gas water freezing and being broken apart with a knife water heating up on a stove

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? the object is an asteroid, not a dwarf planet. the object is a moon, not a dwarf planet. the object is not a dwarf planet because it travels with other objects. the object is not a dwarf planet because it is round.