why is a blue star cuz of temperatuure or location

6,585 results

  1. science

    why is a blue star cuz of temperatuure or location
  2. SCIENCE HELP PLEEASE

    Given the following images, choose the one that most likely represents an O-class star. Star A is a yellow star. Star B is a blue star. Star C is a red star. Star D is a green star. A B C D is it b
  3. Science

    Which is hotter - a red star or a blue star? Why? I know it's the blue star, but I don't know why...
  4. science help PLS

    When nuclear fusion begins, what can be said about the internal processes within that star? Atoms in the star begin to split. Atoms in the star begin to combine. The star is turned into a nebula. The star is turned into a blue giant. is it b
  5. science help

    When nuclear fusion begins, what can be said about the internal processes within that star? Atoms in the star begin to split. Atoms in the star begin to combine. The star is turned into a nebula. The star is turned into a blue giant. is it b
  6. science

    Using various telescopes, astronomers discovered a giant star that is 100 times larger than the Sun, and is very hot. It is blue-white in color. Why does the Sun appear brighter than this larger star when viewed from Earth? - The Sun is older than the larger star -The Sun is ...
  7. science

    Using various telescopes, astronomers discovered a giant star that is 100 times larger than the Sun, and is very hot. It is blue-white in color. Why does the Sun appear brighter than this larger star when viewed from Earth? - The Sun is older than the larger star -The Sun is ...
  8. Science

    In general, the narrower the spectral line of a star A.the hotter the star is B.the bigger the star is C.the denser the star is D.the smaller that star is E.the cooler the star is E. the cooler the star is . Lower temperatures result less Doppler broadening of lines in the ...
  9. science help pls pls

    Look at the position of Location 1, Location 2, and Location 3 in this picture. Simple diagram of a lake represented by a wavy circle. The circle is labeled 'Lake,' and there are three points outside of the lake: 'Location 1' is to the northeast of the lake, 'Location 2' is to...
  10. English

    The star is much brighter than the sun. ----------------------- Is 'the star' in generic use in this sentence? Does 'the star' mean all the star or only one star which I am looking at now?
  11. Astrophysics

    Star Power and Temperature Star A and Star B Consider two stars that are the same size (they have the same diameter), but have different surface temperatures. Let’s say Star A’s temperature is 3000 K and Star B’s temperature is 4500 K. Let’s look at the ratio of Star B...
  12. Physics

    A blue supergiant star has a radius of 7.4 × 10^10 m. The spherical surface behaves as a blackbody radiator. If the surface temperature is 2.4 × 10^4 K, what is the rate at which energy is radiated from the star? 2 × 10^3 J/s 4 × 10^19 J/s 2 × 10^32 J/s 3 × 10^33 J/s
  13. science help

    An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is brighter than the second star. Which of the following is a valid conclusion about the first star? It is larger than the second star. It is smaller than the second star. It is ...
  14. Physics-Energy

    Loop Track Location 1 Location 2 Location 3 PE (J) 0.16 0.12 0.04 KE (J) 0.03 0.06 0.09 TME (J) 0.19 0.18 0.13 h (m) 0.4 0.3 0.1 v (m/s) 1.2 1.7 2.1 Roller Track Location 1 Location 2 Location 3 PE (J) 0.12 0.08 0.04 KE (J) 0.03 0.06 0.07 TME (J) 0.15 0.14 0.11 h (m) 0.3 0.2 0...
  15. science help PLS

    An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is brighter than the second star. Which of the following is a valid conclusion about the first star? It is larger than the second star. It is smaller than the second star. It is ...
  16. English

    The sun is much brighter than the star. ----------------------- What does the star mean here? Does "the star" refer to all stars or one star which the speaker want to mention?
  17. 5th Grade Math

    Question:Percy is coloring a flag he made for class. He can use the colors blue, green, yellow and red.He can paint the rectangle part (backround) of the flag one color, the triangle one color, and the star one color. For example, Percy could make the star yellow, the ...
  18. Science

    Which of the following is an indication that a planet may exist near a distant star A. the star varies in temperature B. The star has a very slight back and forth motion C. the star has very strong gravity D. Radio wave activity increases near the star I think the answer is A
  19. Science

    In general, the narrower the spectral line of a star A.the hotter the star is B.the bigger the star is C.the denser the star is D.the smaller that star is E.the cooler the star is http://en.wikipedia.org/wiki/Stellar_classification
  20. physics

    In a double-slit experiment, it is found that blue light of wavelength 460 nm gives a second-order maximum at a certain location on the screen. What wavelength of visible light would have a minimum at the same location?
  21. Physics

    Hunting a black hole. Observations of the light from a certain star indicate that it is part of a binary (two-star) system. This visible star has orbital speed v = 270 km/s, orbital period T = 1.6 days, and approximate mass m1 = 6.0Ms, where Ms is the Sun's mass, 1.99 x 1030 ...
  22. science

    the apparent magnitude of star is how bright they look to us we are on the earth looking up into space which would look brighter Small star Big star I think that is the big star thank you in advance
  23. earth science

    Stellar evolution is the life cycle of a star. A cycle suggests that upon death of a star, another star is born. How is this possible? Stars never really die. The death is a black dwarf star. This type of death triggers the birth of a new star. The death is a red giant. This ...
  24. Physics Classical Mechanics

    Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 2.32 × 10^31 kg and Star 2 has mass m2 = 1.76 × 10^31 kg. Assume that each star undergoes uniform circular motion about the center of mass of the system (cm...
  25. English

    1. The sun is much brighter than the star. ------------------------------------- Is the star in generic use? Or does the star refer to the specific star? In my opinion, some stars are brighter than the sun, aren't they?
  26. science

    if the spectrum of a star indicates that the star shines with a red light, approximately what is the surface temperature of the star?
  27. physics

    Consider a star with a mass of 8.7 x 1031 kg. Determine the radius of the star if a typical star has a density of 1400 kg/m3.
  28. Astronomy

    Star A has 3 times the surface temperature and 0.6 times the radius of Star B. What is the ratio of the luminosity of Star A to the luminosity of Star B? (Indicate your answer to an accuracy of 0.1).
  29. science help PLS

    An astronomer see a star that is very far away but still very bright. What can she conclude about the star? The star must be very large. The star must be very small. The star must be moving away from Earth. The star must be moving closer to Earth.
  30. English

    Which sentence contains repetitious words that should be left out? A. The bright star is visible to the eye. B. The star was visible centuries ago. C. The bright star is visible. D. The star will soon disappear.
  31. science

    Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 1.72 × 1031 kg and Star 2 has mass m2 = 1.60 × 1031 kg. Assume that each star undergoes uniform circular motion about the center of mass of the system (cm). ...
  32. science

    Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 1.72 × 1031 kg and Star 2 has mass m2 = 1.60 × 1031 kg. Assume that each star undergoes uniform circular motion about the center of mass of the system (cm). ...
  33. animals

    What is the location of the Little Blue Penguin?
  34. Astronomy

    Star 'A' has twice the radius of star 'B'. The ratio of the surface area of star 'A' to the surface area of star 'B' is equal to 8 4pi 2 1/8 4
  35. Astronomy

    1. What color are stars that are very hot and very bright? A. Red B. Blue C. White D. Yellow 2. During the contraction of a protostar, density increases and ______ rises. A. Nuclear energy B. Dust C. Temperature D. Outflow 3. What is the apparent brightness of a star? A. How ...
  36. english

    WRITE FOR E XAMPLE "THE NIGHT IS STARRY AND THE STAR ARE BLUE AND SHIVERIN THE DISTANCE WHAT ANS
  37. Astronomy

    Hi, can you please check my work? I really need to do well on this. 1. What properties of a star are needed to calculate the stars luminosity? a. size and apparent brightness b.mass and distance to the star**** c. temperature and diameter of the star d. apparent brightness and...
  38. Physics-Astronomy

    A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...
  39. Astronomy

    Another possible energy source would be gravity. Imagine that the strange object contains a black hole of mass mbh. You drop a star of mass m into it. If the star of mass m starts at rest at infinity, what will the kinetic energy of the star be when it crosses the event ...
  40. Astronomy

    How can I tell a north circumpolar star from a south circumpolar one based on its declination and my location?
  41. physics

    a 9.9*10^23 kg planet orbits a star in a circular orbit. The planet is 5.6 AU away from the star and has an orbital velocity of 32 km/s. What is the mass of the star. (1AU = 1.496*10^11m)
  42. science

    The color of a star could be an indication of the a) rate of fusion reaction b) age of the star c) size of a star d) all the above e) b and c only f0 none of the above d
  43. Math

    Mary has cloth in 4 colors (red, blue, green, yellow)and 2 styles (large, small) for the school logo (star). The flag she is making will have 2 different stripes with white in the middle and the logo. What is the probability that her design will have red and blue stripes and ...
  44. English

    1. If I met my favorite movie star, I would try shake hands with him. 2. If I met my favorite movie star, I would take his autograph. 3. If I met my favorite movie star, I would just smile at him. 4. If I met my favorite movie star, I would show my pocket notebook for ...
  45. Math

    A variable star is one whose brightness alternately increases and decreases. For one such star, the time between periods of maximum brightness is 5.6 days, the average brightness (or magnitude) of the star is 5.5, and its brightness varies by ±0.30 magnitude. Find a function ...
  46. Calculus 1

    A variable star is one whose brightness alternately increases and decreases. For one such star, the time between periods of maximum brightness is 4.7 days, the average brightness (or magnitude) of the star is 5.3, and its brightness varies by ±0.35 magnitude. Find a function ...
  47. Science

    The path a star take in its life time is determined by Its location in the universe**** Its temperature Its luminosity Its mass I think its A, but I'm not quite sure. Could someone help me understand this better?
  48. Physics

    The peak wavelength and observed color of a 50,000 K star is 58nm and too blue to see with the human eye. True or False.
  49. math check probability

    5. A bag contains 7 green marbles and 4 white marbles. You select a marble at random. What are the odds in favor of picking a green marble? A. 7:11**? B. 7:4 C. 4:7 D. 3:7 ------------------------------------ 6. Food Express is running a special promotion in which customers ...
  50. Physics

    A liquid of density 1.23 × 103 kg/m3 flows steadily through a pipe of varying diameter and height. At location 1 along the pipe the flow speed is 9.23 m/s and the pipe diameter is 1.07 × 101 cm. At location 2 the pipe diameter is 1.71 × 101 cm. At location 1 the pipe is 9....
  51. Physics

    Sadly you have become trapped inside the gravity well of a star of mass M = 6.435×10^30kg. At a distance of r0 = 7.543×10^10m from the center of the star you find yourself moving directly towards it at 5.876×10^4m/s (relative to the star). How fast are you moving relative ...
  52. Astronomy

    1. When comparing the sizes of stars, our Sun is: a.) the largest star discovered to date b.)one of the larger stars discovered to date c.)medium size as compared to other stars d.)one of the smallest stars discovered to date My answer: c or d 2. What information can ...
  53. Ap physics 1

    The mass of a star in a galaxy far, far away, is 3.12 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 2.46 × 108 km. Treating this planet and star as particles,with each mass concentrated at ...
  54. Physics

    The mass of a star in a galaxy far, far away, is 2.13 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 7.87 × 108 km. Treating this planet and star as particles, with each mass concentrated at...
  55. Psychology

    Star and her brother, Mike, produce roughly the same levels of male hormones and female hormones. Given this information, it is likely that: Answer Star and Mike have not yet reached puberty. Star has reached puberty but Mike has not. Mike has reached puberty but Star has not...
  56. Astro-Physics(Binary Star System)

    In a binary star system in which 2 stars orbit each other about their centre of mass, the mass of one star is 20m while the other star is m. In another binary star system, the masses of the star are 14m and m. The fixed distance between the stars in the both cases are the same...
  57. astronomy

    I just wanted to check to make sure I put these in the right order steps of a low mass star a clump forms in a giant molecular cloud. then a prostar forms hydrogen fusion begins the star moves onto the red giant branch, then a helium flash occurs the star moves onto the ...
  58. modern physics

    A star emits light with wavelength 120 nm. An observer on earth measures the wavelength of the light received from the star to be 600 nm. Calculate the speed with which the star is moving.
  59. math

    Tammy had 900 red and blue buttons in a big box. 30% of them were blue buttons . She sold some of the blue buttons in the afternoon and the percentage of blue buttons dropped to 25% . How many blue buttons were left
  60. Science please help :)?

    3. which if the following factors determines how long a star will live ? ( 1point ) A . star’s color b. the star’s mass**** c. the star’s diameter d. the star’s distance from the sun 4 . which of the following causes constellations to appear to move throughout the ...
  61. PHYSICS

    A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on the spacecraft by the star is 500 N. What will the force become when the craft has approached to a position 2 billion km from the star?
  62. Physics

    A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on the spacecraft by the star is 500 N. What will the force become when the craft has approached to a position 2 billion km from the star?
  63. Earth Science

    What color will a star be with a surface temperature of 5000–6000 K? A. blue B. yellow C. white my choice is B yellow
  64. Physics

    A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.2 x 1020 m, and the angular speed of the star is 4.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
  65. physics

    A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
  66. Math

    How do I do these? 1.A number cube is rolled 120 times. The number 4 comes up 47 times. What is the experimental probability of rolling a 4? What is the theoretical probability of rolling a 4? A)47/120;1/30 B)47/120;1/6 C)4/47;1/6 D)1/6;47/120 2.Food Express is running a ...
  67. Math

    How do I do these? 1.A number cube is rolled 120 times. The number 4 comes up 47 times. What is the experimental probability of rolling a 4? What is the theoretical probability of rolling a 4? A)47/120;1/30 B)47/120;1/6 C)4/47;1/6 D)1/6;47/120 2.Food Express is running a ...
  68. Physics

    planet orbits a star once every 2.84 10^7 s in a nearly circular orbit of radius 1.42 10^11 m. (a) With respect to the star, determine the angular speed of the planet. (b) With respect to the star, determine the tangential speed of the planet. (c) With respect to the star, ...
  69. physics

    A star with an initial radius of 1.0 x 10^8 m and period of 30.0 days collapses suddenly to a radius of 1.0 x 10^4 m. (a) Find the period of rotation after collapse. (b) Find the work done by gravity during the collapse if the mass of the star is 2.0 x 10^30 kg. (c) What is ...
  70. physics

    A star with an initial radius of 1.0 x 10^8 m and period of 30.0 days collapses suddenly to a radius of 1.0 x 10^4 m. (a) Find the period of rotation after collapse. (b) Find the work done by gravity during the collapse if the mass of the star is 2.0 x 10^30 kg. (c) What is ...
  71. Physics

    Black Holes are suspected when a visible star is being noticeably pulled by an invisible partner that is more than 3 times as massive as the Sun. A red giant star is accelerated in a linear direction by gravity at 0.075 m/s2 towards an object that is 9.4 x1010 m away. a) What ...
  72. Biochemistry

    Hey guys! I think for 13 the answer is Amonium Sulfate cuz its cheap and the third one is cysteien cuz u get the S-S bonds? 13. To concentrate an enzyme without denaturing it, you would likely use... urea ammonium sulfate a detergent HCl NaOH PITC 14. The tertiary strucure of ...
  73. biology

    You find a male tribble with plaid fur. When you cross this male with a purebred solid blue female, all the offspring are solid blue. A cross between two of these F1 tribbles produces an F2 generation that is 3/4 solid blue and 1/4 plaid. All of the blue F2 tribbles are male. ...
  74. physics

    Assume that the mass of a neutron star is 1.5 times that of the Sun and the radius of the neutron star is 10 km. Ignore effects of Special Relativity. What is the approximate speed at which an object released from far away (at zero speed) reaches the surface of a neutron star...
  75. Physics

    In a binary star system in which 2 stars orbit each other about their centre of mass, the mass of one star is 20m while the other star is m. In another binary star system, the masses of the star are 14m and m. The fixed distance between the stars in the both cases are the same...
  76. Science

    What is a supernova? supernova is the explosion of a star, possibly caused by gravitational collapse, during which the star's luminosity increases by as much as 20 magnitudes and most of the star's mass is blown away at very high velocity, sometimes leaving behind an extremely...
  77. physics(please help)

    a planet orbits a star with period T. As seen from that planet the star's diameter subtends an angle of theta radians. Show the density of the star is given by rou=24pi/G(T^2)theta^3 please help!!!
  78. history

    Which best defines settlement as it pertains to the history of civilization? a location where two parties resolved disputes or conflict over land ownership a location where groups ceased roaming and built permanent dwellings location where natural substances were broken down ...
  79. AP CHEMISTRY

    The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR <-> Acid form <-> Base Form <-> pH Transition Interval...
  80. AP CHEMISTRY

    The following acid-base indicators are available to follow the titration. Which of them would be most appropriate for signaling the endpoint of the titration? EXPLAIN ------- COLOR CHANGE ------ INDICATOR <-> Acid form <-> Base Form <-> pH Transition Interval...
  81. Geography

    16. Why was the Sahel's location important to the early empire of Ghana? a. its location in the Sahara made it difficult to attack. b. its coastal location gave it vast fishing resources c. the Sahel was the trade link between the Mediterranean coast and the rest of Africa d. ...
  82. science help pls pls

    The table below shows the average annual precipitation over a period of five years in three locations of Florida. Locations | Amount of precipitation 1 between 45- 65 inches 2 more than 96 inches 3 less than 8 inches Which of these statements is correct for the three locations...
  83. physics

    A pendulum clock was moved from a location where g=9.8152 m/s^2 to another location where g=9.7959 m/s^2. During the move, the length of the clock's pendulum did not change; nevertheless, the clock lost accuracy. Assuming the clock was perfectly accurate at its previous ...
  84. physics

    Planets A and B orbit the same star. Planet B is four times further from the star than planet A and has twice the mass of planet A. The gravitational force of the star on planet B is ____ the force on planet A.
  85. reading

    there is a comparison in line? 10-eyes that love you,arms that hold 12-holy thoughts that star the night. 16-count many a year of strife well lost. 3-blue waves whitened on a cliff. 6-holding water like a cup
  86. Science: Astronomy

    How many times longer does a 0.50 -M star fuse hydrogen at it's core than does a 1.5 -M star?
  87. Biology

    does the distance of the star of our planet impact the brightness of the star in sky?
  88. science

    a star has a size of 0.1 solar radius. How many times larger is the sun than this star
  89. Science

    What are the steps of evolution of star and sun like star? What's difference
  90. Physical Science

    What is the relationship between the temperature of a star and the spectrum of the star?
  91. physics

    A neutron star has a mass of 1.27 × 1030 kg (about the mass of our sun) and a radius of 6.47 × 103 m. Suppose an object falls from rest near the surface of such a star. How fast would it be moving after it had fallen a distance of 0.0086 m? (Assume that the gravitational ...
  92. maths

    the diagram part of holly's design for a game. In her game a player pays x pence to spin a star. when the star stops spinning the payer wins the amount shown on the arrow. holly wants to gain an average of 5p each time the game is played show how this can be done by adding six...
  93. Physics

    Two telescopes A and B spot a star. Telescope A reports the position of the star to be in the East 60 degrees above the horizontal line joining A and B. Telescope B, which is 500 km West of telescope A spots the star at 30 degrees above the horizontal line joining A and B. ...
  94. astronomy

    Suppose that the gravitational time dilation on the surface of a star is 1.1. What would be the escape velocity from the star?
  95. Physics

    A star radiates at the rate of 1.5 X 10^24 W. It's radius is 10.0 X 10^8 m. Assuming that the star is a blackbody radiator, (e=1), what is the surface temperature?
  96. Physics

    a star radiates at the rate of 1.5 X 10^24 W. It's radius is 8.0 X 10^8 m. Assuming that the star is a blackbody radiator, (e=1), what is the surface temperature?
  97. Physics

    A star with the same mass and diameter as the sun rotates about a central axis with a period of about 29.2 days. Suppose that the sun runs out of nuclear fuel and collapses to form a white dwarf star with a diameter equal to that of the earth. Assume the star acts like a solid...
  98. Astronomy

    Another star cluster ("star cluster 2") lies 7.4 Mega-parsecs from the starship, and has an apparent radius of 6.3 arc seconds. You would like to know how big it is. Is it the same size as galaxies in our universe (i.e. tens of kilo-parsecs) or only as big as a star cluster in...
  99. science

    What is different about a massive star's lifetime during the hydrogen fusing phase? Where is this star on the H-R diagram?
  100. math

    A spinner is divided into 8 equal parts. They are numbered 1-7 and the 8th has a star. What is the probability of it landing on the star?
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