lect 7 part 1

lect 7 part 1 - Question31 If you apply a high voltage...

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2/15/2010 1 If you apply a high voltage across electrodes in a chamber of hydrogen, the type of spectrum you will see in a spectroscope looking at the gas is: Question 3 1 A an emission spectrum B an absorption spectrum C a continuous spectrum D all of the above spectra E none of the above spectra Question 3 2 Rutherford shot alpha particles at a thin foil and was able to show that AG o l d foil has no neutrons BG o l d foil has no electrons CT h e atom is generally very empty except for a dense area where protons and neutrons are concentrated. DT h e atom is generally very uniform and when you shoot an alpha particle at it, it is very likely to hit a proton an be reflected back. Question 3 3 The electron permitted orbits and their energies are shown for a fictitious atom. If the electron is in the ground state (lowest possible energy), which of the following photon energies could be absorbed? A. 1 B. 2 C. 4 D6 D. 6 E. 7
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2/15/2010 2 Two objects are moving closer together. Each will see the other's light A red-shifted B better than if moving apar Question 3 4 B better than if moving apart C richer in heavier elements D blue-shifted E shifted into the microwave region of the spectrum A police car siren has a frequency of 500 Hz. As the police car recedes from your house, you would hear a frequency. Question 3 5 A higher than 500 Hz. B exactly 500 Hz. C lower than 500 Hz. The fraction of the Sun that is comprised of hydrogen and helium is roughly A 98% Question 3 6 B 90% C 50% D 10% E2 %
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2/15/2010 3 Energy generation in the Sun results from A fission of uranium B fission of hydrogen Question 3 7 Cg r a v i t a t i o n a l contraction Dt h e Sun isn't generating energy; it's just cooling Ef u s i o n of hydrogen What is nuclear fusion? A a heavy nucleus splitting apart to form two lighter nuclei Question 3 8 B the attachment of electrons to nuclei to form atoms Ct w o nuclei sticking together to form a new, heavier nucleus Da nucleus changing to become the nucleus of a different element by emitting an electron and a neutrino Energy is transported from the center of the Sun to the surface Aby radiation in the central thermonuclear core and convection through the rest of the interior.
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lect 7 part 1 - Question31 If you apply a high voltage...

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