A car drives at a constant speed of 3 m/s around a circle with radius 20 m. What is the centripetal acceleration of the car? A. 9.2 m/s2 B. 0.45 m/s2 C.0.15 m/s2 D. 6.7 m/s2​

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Select the correct answer. what does the process of natural selection involve?