Pls help! sponge

sandworm

crab

sea star

flatworm

Which characteristic do these animals have in common

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

This is the substance(s) formed in a chemical reaction.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.