A radio galaxy whose lobes are swept back as if forming a tail probably indicates Group of answer choices the galaxy is about to evolve into a spiral. the galaxy is isolated, not part of a cluster. evidence for intergalactic matter. there must be another galaxy nearby. the galaxy is moving towards Earth.

Drag each item into the proper state of matter category.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.