A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is 2.1. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it