What’s the answer to this?

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.

The number at the end of an isotope’s name is the number.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?