Some particle accelerators accelerate particlesaround in circular paths up to speeds veryclose to the speed of light. Which radius will be advantageous and why? 1. large radius; larger centripetal acceleration
2. small radius; smaller centripetal acceleration
3. large radius; smaller centripetal acceleration
4. small radius; larger centripetal acceleration

Regarding the history of the universe, which of the following is true? all the chemical elements were created during the big bang, but some have been modified since that time as a result of radioactive decay. the earth formed quickly after the big bang. all the current stars in our galaxy formed about the same time billions of years ago. key elements of which earth and life are made, including carbon, oxygen, and iron, did not exist when the universe was born and were created later in stars.