Using the Bohr Model of the hydrogen atom, calculate the wavelength, frequency, and energy of the Humphreys gamma (n = 9  n = 6) spectral line. Would this spectral line be visible from the ground (you will have to investigate the transmission of the atmosphere)?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Aballet student who learns with the of his instructor is demonstrating learning.