How is Galilean relativity comparable to special relativity?

Are aliens real? justify you’re answer.

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.