If conducting research for a paper on restricting cell phone usage in automobiles, which source would be most effective to use in your argument?

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Particles vibrate in a rigid structure and do not move relative to their neighbors.