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66 Cards in this Set
- Front
- Back
- 3rd side (hint)
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If the distance to a star is 10 light-years, then
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a. the star is 10 million AU away.
b. the star must have formed 10 billion years ago. c. the light we see left the star 10 years ago. d. the star must be very young. e. the star must be very old. |
C |
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Which of the following is the largest |
a. the diameter of Earth b. diameter of moon c. diameter of sun d. diameter of jupiter e. distance from earth to the sun |
E |
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if the distance to a star is 4.2 light years away
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a. the star is 4.2 million au away b. the light left the star 4.2 years ago c. the star formed 4.2 billion years ago d. the star is young e. the star is old |
B |
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the diameter of a typical star is approximately ______ times larger than the typical planet |
10 100 1000 10,000 100,000 |
100 |
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the mily way galaxy |
a. contains about 100 billion stars.
b. is about 200 light-years in diameter. c. is the largest known object in the universe. d. all of the above. e. a and c. |
A |
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the average distance from the earth to the sun is |
1 ly.
1 million km. 1 million miles. 1 billion km. 150 million km. |
150 million km |
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In contrast to Ursa Major, the Big Dipper is not a(n) ___ but is instead a(n) ______
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a. star; constellation.
b. asterism; constellation. c. a constellation; asterism. d. Wrong! Both are asterisms. e. Wrong! Both are official constellations |
C |
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An observer on Earth's equator would find
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a. Polaris directly overhead.
b. Polaris 40° above the northern horizon. c. Polaris on the northern horizon. d. that the celestial equator passing directly overhead. e. that the ecliptic coincides with the horizon. |
C |
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the zenith is always on ______ |
a. Earth's equator.
b. Earth's north pole. c. Earth's south pole. d. Anywhere on Earth |
d |
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The moon’s angular diameter is half a degree ( 0.5° ). How much is this in arc minutes ( ‘)?Show your calculation:
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a. 120’
b. 60’ c. 30’ d. 3600’ e. 1800’ |
c |
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The sun’s angular diameter is half a degree ( 0.5° ). How much is this in arc seconds ( “)?Show your calculation:
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a. 120”
b. 60” c. 30” d. 3600” e. 1800” |
e |
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flux ratio equation : |
look it up |
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precession of the rotation axis of earth takes _____ to ccomplete a cycle |
a. 24 hours
b. one year c. 260 years d. 26,000 years e. 260,000 years |
d |
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Nothern hemisphere winters are colder than norther summers because |
a. Earth is closer to the sun during the summer than it is during the winter.
b. the snow that falls in the northern latitudes cools Earth during the winter. c. the light from the sun shines more directly on the Northern Hemisphere during the summer.d. the period of sunlight is longer during the summer than during the winter. e. c and d. |
e |
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At what two celestial locations do the celestial equator and ecliptic coincide?
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a. winter solstice and summer solstice
b. vernal equinox and autumnal equinox c. They coincide at all points because they are the same. d. north celestial pole and south celestial pole e. zenith and east point |
b |
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The vernal equinox is the point on the sky where the sun crosses the __________ going north and east.
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a. north celestial pole
b. south celestial pole c. celestial equator d. horizon e. zenith |
c |
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The summer solstice (at the start of summer) is the point on the ecliptic where the sun
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a. crosses the celestial equator moving north.
b. crosses the celestial equator moving south. c. is farthest north of the celestial equator halting its northward movement. d. is farthest south of the celestial equator halting its southward movement. e. is closest to Earth |
C |
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waxing / waning quiz 4 |
look it up |
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In which direction does the daily motion of the moon occur in the sky, against the background stars, whenviewed from the Earth?
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a. toward the west
b. toward the east c. toward the north celestial pole in the summer and the south celestial pole in the winter d. toward the south celestial pole in the summer and the north celestial pole in the winter |
b |
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The ____ of the moon is the period of time for the moon to complete a cycle of the lunar phases and isapproximately ____days long
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a. sidereal period, 27.32
b. sidereal period, 29.5 c. synodic period, 27.32 d. synodic period, 29.5 e. Saros cycle, 6585.3 |
d |
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The sidereal period of the moon is |
a. the period of time for the moon to complete a cycle of the lunar phases
b. the period of time for the moon to orbit Earth once with respect to the stars. c. the period of time between successive eclipses at a given location on Earth. d. the period of time from when the moon rises until the moon rises again the next night. e. None of the above. |
b |
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An eclipse of the moon (lunar eclipse) as seen from Earth, happens when
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a. the hot luminous moon suddenly cools and stops emitting light.
b. the moon passes between Earth and the sun. c. the earth is between the moon and the sun. d. the sun is between the moon and the earth. |
c |
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a lunar eclipse may occur |
a. when the moon is first quarter phase.
b. when the moon is 3rd quarter phase. c. when the moon is full. d. when the moon is new. e. All of the above |
c |
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. A solar eclipse may occur
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a. when the moon is first quarter phase.
b. when the moon is 3rd quarter phase. c. when the moon is full. d. when the moon is new. e. All of the above. |
d |
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Relative to the stars in the sky, the sun moves
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a. about one degree westward each day.
b. about one degree eastward each day. c. about 360 degrees westward each day. d. about 360 degrees eastward each day. e. along the celestial equator. |
B |
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A solar or lunar eclipse will occur
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a. when the sun is near the line of nodes of the moon, and the moon is new or full.
b. any time the moon is new or full. c. when the sun is near the solstice, and the moon is new or full. d. half-way through an eclipse year. e. when the sun is near the equinox, and the moon is new or full. |
A |
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Which of the following is not visible during totality of a total solar eclipse?
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a. the corona of the sun.
b. the chromosphere of the sun. c. prominences. d. the photosphere of the sun. e. all of the above. |
D |
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A solar eclipse that occurs when the moon's umbra does not reach Earth's surface is called
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a. a total solar eclipse.
b. a partial solar eclipse. c. an annular solar eclipse. d. a penumbral solar eclipse. e. an umbral solar eclipse. |
C |
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An eclipse season
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a. is the interval when eclipses are possible.
b. is when the line of nodes points at the sun. c. occur about six months apart. d. last a few weeks. e. all of the above. |
E |
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Spring tides occur
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a. at new moon and first quarter moon.
b. at first quarter and third quarter moons. c. at new moon and full moon. d. at third quarter and full moons. e. at noon and midnight. |
C |
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. ____ occur when the moon is first or third quarter.
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a. Neap tides
b. Spring tides c. Total solar eclipses d. Annular eclipses e. A coppery red moon will |
a |
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Kepler's second law implies that
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a. a planet should move at its greatest speed when it is closest to the sun.
b. the most massive planets will have the greatest speed in their orbits. c. the speed of a planet in its orbit depends on the size of the epicycle. d. the mass of the planet determines how far the planet is from the sun. e. the deferent and the epicycle have to be attached to the sun and not Earth. |
a |
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Kepler's first law of planetary motion implies that
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a. the planets move at a constant speed at all points in their orbits.
b. the planets all move around Earth in elliptical orbits. c. uniform circular motion is adequate to describe the motion of all planets. d. planets move in elliptical orbits around the sun, with the sun at the center of ellipse. e. planets move in elliptical orbits around the sun, with the sun at one focus. |
e |
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Saturn is on average 10 AU from the sun. What is the approximate orbital period of Saturn?
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a. 10 years
b. 32 years c. 100 years d. 1000 years e. 1,000,000 years |
b |
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Newton's law of gravitational force is expressed as follows:
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a. An object with no force on it moves in a straight line with constant velocity.
b. An object with a force on it is accelerated in the direction of the force an amount inverselyproportional to its mass and directly proportional to the size of the force. c. For every action there is an equal and opposite reaction. d. The force between two objects is directly proportional to the product of their masses andinversely proportional to the distance between them squared. e. Gravitational force is proportional to the sum of two masses. |
d |
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Increasing the diameter of a telescope
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I. increases its light-gathering power.
II. increases its resolving power. III. increases it magnifying power. IV. increases its chromatic aberration. |
I & II |
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Chromatic aberration occurs in a ____ telescope when ____.
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a. reflecting; different colors of light do not focus at the same point
b. refracting; different colors of light do not focus at the same point c. reflecting; light of different wavelengths get absorbed by the mirror d. refracting; light of different wavelengths get absorbed by the lens |
B |
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The technique called ____ uses a high-speed computer to monitor atmospheric distortion and adjust theoptics of a telescope to partially compensate for the seeing.
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a. photometry
b. chromatic aberration c. active optics d. spherical aberration e. adaptive optics |
e |
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The resolving power of a telescope is
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a. a measure of the minimum angular separation that can be seen with the telescope.
b. a measure of the maximum angular separation that can be seen with the telescope. c. a measure of the amount of light that the telescope can gather in one second. d. the separation between the objective and the image. e. a measure of how blurry object appear in the telescope. |
a |
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The pupil of the human eye is approximately 0.8 cm in diameter when adapted to the dark. The ratio ofthe light-gathering power of a 1.6-m telescope to that of the human eye is ____.
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a. 2
b. 4 c. 20 d. 400 e. 40,000 |
e |
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One star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to thecooler star, how much more energy per second will the hotter star radiate from each square meter of itssurface?
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a. 16 times
b. 2 times c. 1x10^16 times d. 625 times e. 25 times |
a |
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Which of the following can be determined by using the Doppler effect? |
I. the speed at which a star is moving away from an observer
II. the transverse velocity of a star III. the radial velocity of a star IV. the speed at which a car is traveling toward an observer |
I , III , IV |
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The temperature of an object from which no heat energy can be extracted is
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a. 0 F.
b. 0 C C. 0 K. d. 100 K. e. 100 C |
C |
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The sun has a surface temperature of approximately 5800 K. At what wavelength does the maximumenergy radiated by the sun occur?
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a. 5800 nm
b. 300 nm c. 174 nm d. 500 nm e. 3000 nm |
d |
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Astronomers can use ____ to measure magnetic fields on the sun.
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a. helioseismology
b. perchloroethylene c. neutrino detectors d. a magnetic carpet e. the Zeeman effect |
e |
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The chromosphere of the sun
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a. is hotter than the photosphere.
b. appears yellow-white in color during total solar eclipse. c. is the visible surface of the sun. d. produces an absorption spectrum. e. all of the above. |
a |
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A recent sunspot maximum occurred in 2001. What is the year of the sunspot maximum thatimmediately follows the 2001 maximum if the solar cycle continues?
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a. 2006 or 2007
b. 2012 c. 2018 d. 2023 e. The last cycle started a Maunder minimum and the next maximum cannot be predicted. |
b |
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Most of the visible light we see coming from the sun originates from the
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a. chromosphere.
b. photosphere. c. corona. d. sunspots. e. magnetic field. |
b |
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The _ ofa star is a measure of the total enerry radiated by the star in one second
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a. color
b. apparent visual magnitude c. luminosity class d. spectral type e. luminosity |
e |
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A star's luminosity depends only on the star's
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a. distance and diameter.
b. temperature and distance c. distance. d temperature and diameter. e. apparent magnitude. |
d |
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In the H-R diagram, 90 percent of all stars are
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a. in the giant region.
b. in the supergiant region. c. among the B stars. d. among the G stars. E. on the main sequence. |
e |
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ln an H-R diaganl stars with the smallest radius are found in the ____ of the diagram
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a. center
b. upper left corner c upper right corner d lower left corner e lower right comer |
d |
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The most common stars are
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a. supergiants
b.giants. c. upper (more luminous) main-sequence stars. d. white dwarfs. e. lower less Iuminous main-sequence stars |
e |
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The star named Scheat (Beta Pegasi) is of M2 spectral type and luminosity class. Based on thisinformation, which of the following are true?
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l Scheat has a surface temperature less than the sun.
ll Scheat has a diameter that is greater than that of the sun. lll Scheat is more luminous than the sun. IV Scheat is located near the upper left-hand comer in the H-R diagram. |
I , II , III |
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if a star has a parralax of .02 seconds of arc, then it's distance is
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a 20 pc b 50 pc c 2 pc d 5 pc e 500 pc |
b d = 1/p = 1/.02 = 50 |
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If a star with an absolute magnitude of-5 has an apparent magnitude of+5, then its distance is
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a 1 pc b 10 pc c 100 pc d 1000 pc e 10,000 pc |
d |
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Emission nebulae are also called ____ because they are composed of ionized hydrogen.
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a. HI regions
b. HII regions c. Bok globules d. HeI regions e. reflection nebulae |
b |
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4. The proton-proton chain
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a. combines two hydrogen nuclei to produce a single helium nucleus and energy.
b. splits a helium nucleus to produce 4 hydrogen nuclei and energy. c. is the mechanism that increases the temperature between the photosphere and corona ofthe sun. d. is the interactions between protons in Earth's atmosphere that produces auroras. e. produces energy in the core of the sun in the form of gamma-rays, positrons, andneutrinos. |
e |
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The creation of ____ require(s) that a young hot star (T = 25,000 K) be relatively nearby.
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a. emission nebulae
b. HI regions c. molecular clouds d. the cool gas of the interstellar medium e. 21-cm radiation |
a |
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While on the main sequence a star's primary energy source comes from
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a. nuclear fusion.
b. nuclear fission. c. gravitational potential energy. d. magnetic fields. e. chemical reactions |
a |
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How do main sequence stars become giant stars ? |
a They use the hydogen b They use the nitrogen c They absorb the gasses around them d They use nuclear fission |
a |
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whats the triple alpha process ? |
a. fusion of three helium nuclei into one carbon nucleus b. fusion of three hydrogen nuclei into one carbon nucleus c. iron turning into hydrogen with 3 nuclei |
a |
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how can a helium flash be produced ? not mc |
if a star's mass lies between .4 and 3 solar masses |
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How are planetary nebulae produced ? not mc |
ultraviolet radiations from white dwarfs |
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READ CHAPTER 10 REVIEW |
NOW, BUT DRINK A BEER |
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READ CHAPTER 11 REVIEW |
NOW, BUT DRINK A BEER |
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