A 700 kg race car makes one lap around a track. It has a velocity of 20 m/s with a centripetal force of 5,600 n. What is the radius of the track?.

The different forms of a gene for a given trait are called .

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct