Definition: This is the medical use of ionizing radiation as part of cancer treatment to control malignant cells.

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

Which of these metals are magnetic?

What is the relationship between wavelength of light and the quantity of energy per photon?