1. Science

    I have a what looks to be a silver or platinum ring, it has a diamond chip, but not a full diamond to my knowledge. Inside it is marked with a star then 10k. The star might have something in it but its hard to tell.
  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. physics

    a ring made of diamond and gold ( sp. gravity respectively 3.5 and 17.5) weight 7.35*10^-3 kg. when immersed in water , the ring weighs 6.85*10^-3 kg. find the weights of the diamond and the gold of the ring
  4. chemistry

    The density of diamond is 3.51g/cm^3,and the density of platinum is 21.43g/cm^3.If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders,which graduated cylinder would have the greatest volume
  5. chemistry

    The density of diamond is 3.51 g/cm^3 and the density of platinum is 21.43g/cm^3. If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders, which graduated cylinder would have the greatest volume
  6. Chemistry

    The density of diamond is 3.51g/cm^3,and the density of platinum is 21.43g/cm^3.If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders,which graduated cylinder would have the greatest volume
  7. Physics

    In Larry Niven's science-fiction novel Ringworld, a rigid ring of material rotates about a star. The inhabitants of this ring world live on the starlit inner surface of the ring (where it is always noon). The tangential speed of the ring is 1.25x10^6 m/s,
  8. Jewelry markings

    I have to find out what certain markings on jewelry mean. 925-I think it means silver, but I have to be more in depth. han-hand made? S O- no idea F-no idea 925 is indeed sterling silver. I have no idea on the others. The 925 specifically means 92.5%
  9. 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
  10. 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
  11. Physics

    In Larry Niven’s science fiction novel Ringworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a ro- tational speed of 1.38 × 106 m/s. The inhab- itants of this ring world experience a normal contact force ~n. Acting alone, this
  12. Math

    A new car manufacturer is designing a logo. It is in the shape of a diamond inside a rectangle. The diamond is to have a horizontal width of 3 cm and an area equal to one sixth of the area of the rectangle. Find the required height of the diamond.
  13. 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
  14. 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
  15. 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
  16. Chem

    This question is also confusing me… The density of diamond is 3.51 g/cm^3 and the density of platinum is 21.43g/cm^3. If equal masses of diamond and platinum are transferred to equal volumes of water in separate graduated cylinders, which graduated
  17. math

    the density of a diamond is 3.52 grams per cubic centimeter. Sally has a diamond that has a volume of 20 mm^3. What is the weight of the diamond?.
  18. math

    A baseball diamond has 90 ft between each base A sofball diamond has 60 ft between each base How many yards longer is the space between bases an a baseball diamond than a softball diamond?
  19. 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
  20. physics

    Question Part Points Submissions Used 1 2 3 4 0/0.37 0/0.37 –/0.37 –/0.37 4/15 1/15 0/15 0/15 Total 0/1.48 ...A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside the diamond, red light
  21. science

    I have a gold and diamond ring, probably fake. It is only stamped with the number 35 on the inside.That is why i think it is only junk..
  22. 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
  23. visual logics

    I am trying to write a program to generate a diamond shape each line has odd number of circles. have created the left side of diamond but cant figure how to nest info to make it a complete diamond
  24. 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?
  25. 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.
  26. Chem

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one
  27. Chemistry please help!

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one
  28. Chemistry please help

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one
  29. Stephen

    A company called Acme, has hired you to design their new computer network. They have told you fault tolerance is essential;they cannot afford to have their entire network go down. Which topology would you utilize for them? A Ring, Node, Star, or Bus. I say
  30. 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?
  31. Chemistry

    Consider diamond and graphite. Which of the following is true? (A) Graphite should have a higher melting point than diamond. (B) Differences in composition account for the different properties of gaphite and diamond. (C) Amorphous soilds are likely to have
  32. 6th grade

    Kara has a diamond ring. Her ring has a volume of 6cm(to the third power) and a mass of 2g. What is the density of her ring? INCLUDE UNITS!
  33. Math

    Amy bought a diamond ring for $6,000. If the value of the ring increases at a constant rate of 5.8% per year, how much will the ring be worth in twenty-one years?
  34. math

    A baseball diamond has 90 ft. between each base. A softball diamond has 60 ft between each base. How many yards longer is the space between bases on a baseball diamond than a softball diamond?
  35. 8th grade Algebra

    In a drawing for a dvd player, there are 100 tickets in a box.Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the probability
  36. 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
  37. 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
  38. math

    In a drawing for a DVD player, there are 100 tickets in a box. Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the
  39. 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
  40. 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
  41. 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
  42. MATH

    In a drawing for a DVD player, there are 100 tickets in a box. Five of the cards are marked with a star and the rest are marked with an X. To win, Carmen must draw two cards, without replacement, both of which are marked with a star. What is the
  43. Physics

    In Larry Niven’s science fiction novel Ringworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a rotational speed of 1.5 × 106 m/s. The inhabitants of this ring world experience a normal contact force ~n. Acting alone,
  44. 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
  45. Chemistry

    The reaction through which carbon changes from graphite to diamond form is represented by the equation C(graphite) ---> C(diamond) delta H: ? Using the reactions below, determine the amount of heat absorbed in the change of one mole of graphite to one
  46. Physics

    A LADY IS GETTING MARRIED IN 2DAYS TIME.HER HUSBAND BUYS HER A DIAMOND RING.ON THE DAY OF HER WEDDING HER HUSBAND PLACES THE RING ON HER FINGER.THE RING REFRACTS AT AN ANGLE OF 23.24 DEGREES.CALCULATE THE ANGLE OF INCIDENCE IF THE REFRACTIVE INDEX OF A
  47. 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
  48. 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
  49. 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
  50. Physics- check answer please

    Would the answer be b)? diamond into air? A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into
  51. math 2nd grade

    Makoto and Otis each decorate diamond patterns that are the same size and shape. Makoto deoorates 1/8 of a diamond. Otis decorate 1/4 of a diamond. Who decorates more
  52. physics

    How would I figure out the answer to this question? A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from
  53. Math (trigonometry)

    A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal
  54. 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
  55. Diamond?

    I recently received agorgous "diamond" ring as a gift. He said it was real but I'm not sure. It looks real, the four Cs and everything. But to know for sure without it being apraised I need to know what the stamps inside mean. GF"A" Does anyone have an
  56. physics

    A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 46.05°. Inside the diamond, red light (ë = 660.00 nm in vacuum) is refracted at 17.38° with respect to the normal; blue light (ë = 470.00 nm in vacuum)
  57. 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
  58. geometry

    There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game
  59. 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?
  60. 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
  61. 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.
  62. Algebra 2

    4.)A diamond is purchased for $3500. Its value increases 5% each year. Find the value of the diamond after six years.
  63. algebra 2

    a diamond was purchased for $2500. If is its value increases 6% each year, give the value of the diamond after 10 years?
  64. algebra 2

    A diamond is purchased for $3500. Its value increases 5% each year. Find the value of the diamond after six years.
  65. Chemistry

    The density of pure diamond is 3.5 g/cm^3. The mass of a diamond is 0.25 g.Calculate its volume.
  66. 11th grade

    A diamond contains 0.090 moles of carbon what is the mass of the diamond
  67. Math

    Three Bases and home plate make a diamond that is 90 feet on each side. What is the perimeter of the diamond?
  68. Chemistry

    As a purity check for industrial diamonds, a 22 - carat diamond (1 carat = 0.2g) is heated to 63 degrees C and immersed in 26g of water in a constant pressure calorimeter. The initial temperature of the water is 23 degrees C. Calculate the ΔT of the
  69. Jewelry markings

    I have a diamond ring with the marks "KOBI 14K" inside. I know what the 14K stands for; but, what does the "KOBI" mean?
  70. 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).
  71. 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?
  72. physics

    Calculate the index of refraction of a diamond if the speed of light in a diamond is 1.24x10 to the power of 8 m/s. Please break it down and show all the steps. :) thank you
  73. 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
  74. 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
  75. 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.
  76. Calculus

    Inclusive of a 6.4% tax, a diamond ring sold for $2128.00. Find the price of the ring before the tax was added.
  77. 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
  78. Physics- check answer please

    A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond b) light travelling from diamond into air c) light travelling from water into diamond d) light travelling from diamond into water Would the answer be a)?
  79. science

    how is diamond connected to science? how is diamond connected to math? how is diamond connected to you? why is diamond important?
  80. 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
  81. 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
  82. 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
  83. social studies

    What kind of industry is diamond ring?
  84. CHEM

    SAPPHIRE AND DIAMOND RING ,STAMPED 14K S&S WHAT DOES THIS MEAN?
  85. 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
  86. 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)
  87. 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
  88. 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
  89. 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
  90. science

    i need some help on this question a diamond cutter has a raw diamond that weighs 19.5 carats and from which two 5-carat diamonds will be cut. i need to find out how much the raw diamond weigh in milligrams and plus how much will each of the two cut
  91. Algebra 1 (Ms. Sue)

    1). Solve each equation. 17 = w - 4 2/3s = -6 1/3y + 1/4 = 5/12 x/8 - 1/2 = 6 5/6x - 1/3 = 5/2 2). In 1668, the Hope diamond was reduced from its original weight by about 45 carats, resulting in a diamond weighing about 67 carats. Write and solve an
  92. iNRODUCTION TO COMPUTERS

    THE MOST POPULAR TYPE OF TOPOLOGY USED IN LANs TODAY IS THE: a. bus b. star c.ring d. hybrid ring
  93. physics

    1.A beam of light passes through the air and enters a diamond at an angle of incidence of 40 degrees. Use Snell’s Law to find the angle of refraction of the diamond. (Index of refraction for air is 1.00 and the index of refraction of a diamond is 2.42.)
  94. physical sciences

    Diamond is the hardest substance known while graphite is one of the softest. Both are made only of carbon atoms. What is the most likely reason why this is true? A. Both are bonded ionically. B. Both are bonded covalently. C. The carbon atoms are arranged
  95. math

    I'm working on a school math project, and i need to make my own 2 plans, i know that you can split all 17.5 ct diamonds so that each pirate would get 4.375 ct diamonds but i want to know how i would split them up, like into to 1/2 s or 1/4 and i need
  96. Math

    Professor Smith has invented a time machine and is going to travel back in time 15 years to buy his wife a diamond ring. The ring cost $5000, 15 years ago . The average rate of inflation is 3.09% per year. Round answers to nearest whole $. How much money
  97. really need some help with this

    i need some help on this question a diamond cutter has a raw diamond that weighs 19.5 carats and from which two 5-carat diamonds will be cut. i need to find out how much the raw diamond weigh in milligrams and plus how much will each of the two cut
  98. Algebra 2

    A diamond is purchased for $3500. Its value increases 5% each year. Find the value of the diamond at the end of the sixth year of ownership. Please explain
  99. Chemistry

    The density of carbon in the form of diamonds is 3.51 g/cm^3. If you have a 40- carat spherical diamond, what is the diameter of the diamond in millimeters? (1 carat=0.200 g)
  100. statistics

    When a card is selected from a deck, find the probability of getting a diamond, a face card or a diamond, or a club and a king?