HELP! COUNT HOW MANY GALAXIES!! USE PNG ATTACHED

UDF SkyWalker V1.0 (TYPE THAT INTO YOUR BROWSER)

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

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.