The smooth 2-kg collar is released at a and moves to the right by 0. 8 m (reaching position c). The spring has an unstrected length of 0. 3 m. What is the work done by the spring on the collar from a to c?.

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.