For which of the following does the Bohr model give good results?
1.the energy of the photons in the Balmer series
2.the filling of the electron shells
3.the splitting of the spectral lines for a source in a magnetic field
4.the fine structure of spectral lines
1
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The Hubble Law does not work for nearby galaxies because
A. nearby galaxies are contracting rather than expanding. B. it is difficult to take the spectrum of nearby galaxies as compared to distant galaxies. C. the Hubble law works for all galaxies; distance doesn't matter. D. the speed of nearby galaxies is affected by their gravitational interaction with one another.
A 35.0 kg girl swings on a swingset. At the bottom of the swing’s path, she feels as though she weighs 435 N. What is the value of the tension in the swing’s ropes at the bottom of the swing’s path?
A. 92 N B. 435 N C. 343 N D. 778 N
How does the energy of a water wave differ from the energy of a photon?
What will be an ideal response?
When two bodies of different masses collide, the impulses they exert on each other are
a. equal for all collisions. b. equal but opposite for all collisions. c. equal but opposite only for elastic collisions. d. equal but opposite only for inelastic collisions. e. equal but opposite only when the bodies have equal but opposite accelerations.