what are the appropriate units for the sun's luminosity?

d) yellow c) the Moon is located within the Earths Roche tidal zone [3] [4] In SI units, luminosity is measured in joules per second, or watts. b) If the fusion rate initially increases, then the core expands. Explanation. Which of the following phenomena is not commonly associated with the star formation process? b) are impossible to determine Rank these layers based on their distance from the Suns center, from greatest to least. In 1913, American astronomer Henry Norris Russell plotted the luminosities of stars against their spectral classes (a way of denoting their surface temperatures). In a binary system with a black hole, the Schwarzschild radius depends on the. Luminosity of stars if often expressed in units of the Sun's luminosity (L = 3.9 x 10 26 Joules/s). a) is more perfectly spherical in shape a) gas from the early solar system What additional information, if any, would we need to decide whether these moons experience tidal heating? Which group represents stars that have no ongoing nuclear fusion? d) parts of Saturns upper atmosphere being vented into space, c) lots of individual particles of ice and rock. a) the time between eclipses and the average distance between the stars a) Io is much larger. The General Assembly shall make provision, by law, for the payment of the interest of said school fund, and may provide for the sale of the stock in the Bank of Kentucky; and in case of a sale of all or any part of said stock, the proceeds of sale shall be invested by the Sinking Fund Commissioners in other good interest-bearing stocks or . Which of the following statements about brown dwarfs is not true? Explanation: Luminosity of a star or a group of multitude of far distant stars ( galaxy ), appearing as a small light-emitting disc, is the total amount of energy emitted in a unit of time. a) Io is located very close to Jupiter c) All probably look much like they did when the solar system first formed. d) Gravitational contraction involves the generation of heat by chemical reactions, much like the burning of coal. d) Its apparent brightness will increase by a factor of 3. a) Its apparent brightness will decrease by a factor of 9. A) The hydrogen gas in the Sun is balanced so that it never rises B) The Sun maintains a steady temperature C) There is another way of stating that the Sun generates energy by nuclear fusion Vega is nearer than 10 parsecs from Earth. Which is closest to the temperature of the core of the Sun? by looking for the splitting of spectral lines in the sun's spectrum. Which cluster is most likely to be located in the halo of our galaxy? b) They are in the final stage of their lives. b) mass and radius The Sun's surface seethes and churns with a bubbling pattern. How does an accretion disk around a neutron star differ from an accretion disk around a white dwarf? When a star contracts in size, gravitational potential energy is converted to thermal energy. (Hint: 1 watt = 1 joule/s). b) Earths orbit around the Sun. The star Alpha Centauri A is the same type of star as the sun, but its luminosity is about 1.6 times that of the sun. Which process is required to allow a gravitationally-collapsing gas cloud to continue to collapse? According to modern science, approximately how old is the sun? Which is the strongest of the fundamental forces in the universe? Pulsars are easy to identify by their almost perfectly steady periods of pulsation. d) 3.3 light-years. d) the coma. c) Europa and Ganymede are unusually large moons We can see the Suns ______ most easily during total eclipses. the specific set of nuclear reactions through which the Sun fuses hydrogen into helium. the chromosphere is best observed with ultraviolet telescopes & the corona is best observed with X-ray telescopes. and the Bill of Rights . What is the common trait of all main sequence stars? d) any particle that would orbit in the Cassini division would be in the Roche tidal zone of Saturn Core b) the Sun always has the same amount of mass, creating the same gravitational force In the late 1800s, Kelvin and Helmholtz suggested that the Sun stayed hot due to. Which of the following statements comparing open and globular star clusters is not true? gravitational force and outward radiation pressure. (2) The General Assembly may by general law permit charitable lotteries and charitable gift enterprises and, if it does so, it shall: (a) Define what constitutes a charity or charitable organization; (b) Define the types of charitable lotteries and . PDF Solar Flux and Flux Density Solar Flux Density Reaching Earth What are the appropriate units for the Sun's luminosity? diagrams shows main sequence stars of every spectral type except O, along with a few giants & supergiants. Now we can take the 4th root of both sides, which is equivalent to taking both sides to the 1/4 = 0.25 power. a) 4 H becomes 1 He + energy b) 6H => 1He + energy e) there was not enough material in this part of the solar nebula to form a planet, d) gravitational tugs from Jupiter prevented material from collecting together to form a planet, a) attract each other The overall result of the proton-proton chain is that _____. Planetary nebula formation is more common. b) Gravitational contraction involves nuclear fusion, which generates a lot of heat. b) chromosphere c) the strong force and the weak force b) Particles in the inner rings orbit Saturn at a faster speed than particles in the outer rings. orbital period & average orbital distance. Diameter of the Sun From the distance and measured angular diameter of the Sun (about 0.5 degrees), we can calculate the Sun's diameter Its outer layers will be ejected as a planetary nebula and its core will become a. b) If the fusion rate initially increases, then the core expands. Core c) larger its parallax angle c) Its apparent brightness will decrease by a factor of 3. a) radioactive decay Ch. 10 Flashcards | Quizlet b) accretion b) A massive planet exerts a tidal force on a moon that causes the moon to obtain the same rotational period as its parent planet. Which star spends the longest time in the protostellar phase of life? c) repel each other. d) the amount of energy the Sun radiates into space and the amount of energy that reaches Earth, c) the rate at which fusion generates energy in the Suns core and the rate at which the Suns surface radiates energy into space. Which is more common: a star blows up as a supernova, or a star forms a planetary nebula/white dwarf system? What can we learn about a star from a life track on an H-R diagram? Astronomy Test #5 Flashcards | Quizlet c) no other information is needed: with two moons, there is no possibility of any tidal heating As stated earlier, Kentucky K-12 school districts are required to establish Acceptable Use Policies (AUP's) for appropriate technology use which conforms to the provisions of the 1998 Senate Bill 230 and the accompanying Kentucky Administrative Regulation 5:120 (701 KAR 5:120) as well as federal CIPA requirements . the specific set of nuclear reactions through which tha sun fuses hydrogen into helium. b) a few kilometers Models indicate that the gravitational-wave signal came from the merger of two black holes with masses of 29 Msun and 38 Msun, a merger that resulted in a single black hole with a mass of 63 Msun - The HR Diagram - Highline College A computer accessory salesman attempts to convince you to purchase a "solar neutrino" shield for your new computer. According to the inverse square law of light, how will the apparent brightness of an object change if its distance to us triples? a) gravitational force a) All have gaps and ringlets, probably due to gap moons, shepherd moons, and orbital resonances. e) surrounding Jupiter, d) along Jupiters orbit, 60 ahead of and behind Jupiter, We know that there are large gaps in the average distances of asteroids from the Sun (within the asteroid belt) because we. On an H-R diagram, stellar radii _________. a) light from the Sun reflects off the material in the rings Sec 1 Quiz 3 Flashcards | Chegg.com d) Hold up your hand in front of your face, and alternately close your left and right eyes. a) can be estimated for main sequence stars but not for other types of stars Rank the following layers of the Sun based on their temperature, from highest to lowest. Strong evidence both from surface features and magnetic field data support the existence of a subsurface ocean on ________. e) tidal heating, The four Galilean moons around Jupiter are. Its apparent brightness will decrease by a factor of 9. b) mathematical models of the Sun. c) 4.5 billion years d) It is larger than Pluto and Mercury. Suppose a star has the same apparent brightness as Alpha Centauri A (2.710^8 watt/m^2) but is located at a distance of 200 lightyears . a) strong magnetic fields slow convection and prevent hot plasma from entering the region. HR Diagram Lab - Name: Adele Harris HR Diagram - Studocu d) the strong force and the electromagnetic force, b) gravitational force and outward pressure. How does Charle's law relate to breathing? a) the mass that the Sun loses each second and the amount of mass converted into energy each second b) Its apparent brightness will increase by a factor of 9. Astronomers can measure a stars mass in only certain cases. d) between Mercury and Earths orbit can be determined for main sequence stars but not for other types of stars. Chromosphere How can we best observe the Sun's chromosphere and corona? c) light from Saturn reflects off the material in the rings, a) light from the Sun reflects off the material in the rings. a) 1 light-year c) We need to know whether the planet also has a third moon. e) join together to form a nucleus. How does the largest asteroid, Ceres, compare in size to other solar system worlds? Photosphere The Sun will exhaust its nuclear fuel in about ______. Approximately what is the parallax angle of a star that is 20 light-years away? d) Nothing: mass is conserved. The Sun's surface, as we see it with our eyes, is called the _________. Before we can use parallax to measure the distance to a nearby star, we first need to know __________. b) 10 km Angular momentum plays an important role in star formation. c) All probably look much like they did when the solar system first formed. Nearly all the visible light we see from the Sun is emitted from the ________. a) attract each other. c) sound waves. To estimate the central temperature of the sun, scientists ___________. Which of the following characteristics of a protostellar system is probably not strongly affected by the star's angular momentum? Using Newtons version of Keplers third law, find orbital period of Prometheus. b) Europa and Ganymede always pull on Io from the same direction as Jupiter pulls on Io b) calculate the stars luminosity if we know its distance, or calculate its distance if we know its luminosity The light radiated from the Suns surface reaches Earth in about 8 minutes, but the energy of that light was released by fusion in the solar core about. d) calculate the stars surface temperature if we know either its luminosity or its distance, b) calculate the stars luminosity if we know its distance, or calculate its distance if we know its luminosity. c) by taking a photograph of it On an H-R diagram, stellar masses _________. Chapter 14 and 15 section 1 Astronomy Flashcards | Quizlet a) The rate of nuclear fusion in the Sun peaks about every 11 years. c) more than that of all the planets combined d) the dust tail a) 600 tons Which of these groups of particles has the greatest mass? 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