For an electron in a hydrogen atom (a) when the electron is in the ground state, calculate (r) and (r2) in terms of the bohr radius (b) when the electron is in the ground state, calculate (x) and (y2) in terms of the bohr radius. do not try to integrate to calculate the expectation values! you can do it in smarter way! a (c) when the electron is in the state n = 2,1 = 1, m = -1, calculate (r2).

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 best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.