Karteikarten
Astron Final
Karten in diesem Stapel (30)
- 1Which of the following refers to the balance between the weights of various layers, as in a star or Earth's atmosphere, and the pressures that support them?Hydrostatic Equilibrium
- 2...She only stops clapping her hands when she realizes that her palms are getting hotter. In the context of conservation of energy, Laura experiences a transformation ofmotion energy to heat energy
- 3Which of the following uses radiation to transfer heat?A toy oven powered by a very bright bulb that heats up and cooks brownie mixes
- 4Which of the following statements is true of elementary particles?The antiparticle of a particle carries the opposite charge as the particle
- 5Which of the following statements is true of the process of nuclear fission?It is used in atomic bombs and in nuclear reactors to generate electrical power.
- 6...He observes that as the milk gets hot, hot air rises from the vessel. In this scenario, Paul is most likely to classify the action of the hot air rising from the vessel asConvection
- 7Energy is a challenging concept to grasp becauseit exists in many different forms
- 8Which of the following is true about the views of British physicist Lord Kelvin and German scientist Hermann von Helmoholtz on the Sun's source of energy?They believed that the production of energy in the Sun involved the conversion of gravitational energy into heat energy
- 9The studies of solar oscillations are referred to as helioseismology becauseit is analogous to the use of seismic waves generated by earthquakes to infer the properties of Earth's interior
- 10Convection differs from conduction in that convection involvesHeat transfer by the motion of matter that rises because it is hot and less dense
- 11The the context of Einstein's equation E=mc^2, the conversion of even a small amount of mass results in a very large amount of energy becausethe speed of light squared is a very large quantity
- 12True or False: Astronomers call all the elements heavier than helium "gases"False. The call them metals
- 13True or False: A star is defined as an object that, during some part of its lifetime, derives 100% of its energy from the same process that makes the Sun shine- the fusion of hydrogen nuclei (protons) into heliumTrue
- 14Distinguishing a low-mass brown dwarf from a high-mass planet is difficult becauseLow-mass brown dwarfs are all about the same radius as Jupiter
- 15Ultra-cool brown dwarfs differed from T dwarfs in that ultra-cool brown dwarfssometimes had temperatures that were comparable to that of the human body
- 16Due to_____, the lines in the light that come from the side of a star rotating toward an observer are shifted to shorter wavelengths and the lines in the light from the opposite edge of the star are shifted tothe Doppler effect
- 17If all stars were the same luminosity, then the difference in their apparent brightness would lead one to ascertain thedistance of the stars from Earth
- 18The spectral type of a given dwarf changes with time over a billion years or more from late M through L, T, and Y spectral types becauseBrown dwarfs cool steadily throughout their lifetimes
- 19Spectral classes are a measure of a star's surface temperature becauseA star's temperature determines which absorption lines are present in its spectrum
- 20Which of the following is the best method to measure the Doppler effect of Sirius which will help him determine how fast Sirius rotates?Analyzing the light from Sirius as a whole at once
- 21True or False: Astronomical photometry began with HipparchusTrue
- 22In a discussion in astronomy class, Carrie states that the most massive stars can compress their centers to the greatest degree. Which of the following best supports this statement made by Carrie?Massive stars are the hottest inside and the best at generating energy from nuclear reactions deep within
- 23The reason the lowest-mass dwarfs are so hard to find is thatThey put out very little light when compared to the sun
- 24Some stars appear much brighter than others becausethey emit a very large amount of energy
- 25In the context of diameters of eclipsing binary stars, which of the following occurs during first contact?The smaller star just starts to pass behind the larger star
- 26In the context of stellar luminosities, diameters, and densities, which of the following statements is true of the Hertzsprung-Russel diagramThe upper left of the H-R diagram consists of super-luminous stars that are extremely hot and blue in color
- 27Which of the following stars is an example of a visual binary?Mizar
- 28True or False: An observer of the sky would be fooling himself or herself if he or she assumed the stars visible to the unaided eye are characteristic of general stellar populationTrue
- 29Which of the following statements is true of an eclipsing binary?it involves a star blocking the light of the other, preventing it from reaching Earth
- 30—
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- Karteikarten am Astron Final, erstellt von Daniel Cardenas am 15/05/2018.
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- Daniel Cardenas
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