Why must the centre of the satellite orbit coincide with the centre of the Earth?

25,650 results, page 82

  1. physics

    The planet mars has a mass of 6042e23 kg and a radius of 3038e6 m. how much would a 60 kg person weigh on Mars compared to their weight on Earth? How heavy he would feel he weighed in kg on Mars?
  2. geography

    Does a line of latitude or a line of longitude divide the Earth into Northern and Southern Hemispheres? This is an easy one but I just want to double check. The answer is a line of latitude. Right?
  3. Physics

    An horizontally flying airplane has a 20 m wing span. If the vertical component of the Earth's magnetic field is 2*10^-5 T, and the voltage measured from wing tip to wing tip is 4 mV, What is the ground speed of the plane? (A) 5 m/s (B) 20 m/s (C) 7 m/s (D) 10 m/s
  4. Physics

    An horizontally flying airplane has a 20 m wing span. If the vertical component of the Earth's magnetic field is 2*10^-5 T, and the voltage measured from wing tip to wing tip is 4 mV, What is the ground speed of the plane?
  5. English

    The Catholic Church condemned Galileo because in his teachings earth and humans were not the center of all things. Identify random nouns Identify subjects Identify adjectives Thanks. (is Catholic an adjective)?
  6. Earth Science

    1.Which statement made by a student after examining a rock specimen is an inference? (1)The rock is of igneous origin. (2)The rock has rounded edges. (3)The rock is light-colored. (4)The rock contains large crystals. Is it (1)?
  7. Earth Science

    can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please help
  8. Language Arts

    Be still, sad heart! and cease repining; Behind the clouds is the sun still shinning; thy fate is the common fate of all, into each life some rain must fall some days must be dark and dreary 1. from the context, what do you conclude is the probable meaning of repining in the ...
  9. English

    Slaughter House Five For whatever reason, Billy cannot tell his wife, Valencia, about his Dresden experiences but fluidly recounts minute derails to Montana Wild hack. Why is this? Is she form of earth mother? A fantasy for bored, middle-aged married men?
  10. english

    3. Which one of the following statements is an example of a complex sentence? A. Sparrows at the bird feeder compete for seeds. B. Neap tide is the best time for digging clams. [C. The earth was spinning when Lucas first saw Lucille.] D. The crescent moon is a symbol of Islam.
  11. Social studies

    Which of the following describes a canal? (1 A flat-bottomed boat that carries goods B prehistoric period when Earth was covered with ice C gated part of a river that raises or lowers the water level D waterway dug across land for ships to go through
  12. Science

    Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...
  13. Environmental Science

    The phosphorus, carbon, and nitrogen cycles are termed biogeochemical cycles- bio meaning "living"; geo for the earth (soil); and chemical referring to matter changing form. Explain why this term is appropriate. (I need a short answer)
  14. trigonometry

    Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km. Can you help me find the latitude of Spokane, WA if Spokane and Jordan Valley, OR, 43.15degreesN, are 486 miles apart. I think its either A. 47.50degN or B. 38.80degN thnks
  15. Graphic Design

    5. Which of the following statements regarding the Gestalt movement is true? A. Context has a great impact on reality. B. Expressive colors replaced traditional earth tones. C. Abstract art was born. D. Reality is given more precedence than perception. 6.
  16. Physics

    You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 562 km above the Earth's...
  17. earth/space science

    Walking along the sidewalk one day, you find a rock and want to know what kind it is. You look at it and se that it is an off white color, is greasy feeling when you rub it, and your fingernail scratches it and breaks it up. What kind of mineral do you think you have found?
  18. Science--2 questions! asap!

    During the processes of erosion and deposition, sediments that are the_____ in size will be carried the greatest distances before being deposited. Most___rocks form under conditions found a few kilometers under Earth's surface.
  19. science

    On Earth as a whole, what happens to most of the presipitation? 1 It recharges the soil moisture deflict. 2 it becomes runoff and moves o the oceans. 3 it is store in the soil as capillary oceans. 4 it is returned to the atmosphere through evaporation and transpiration.
  20. science

    my first is VAN but not in PAN,my second is EARTH and also in HEAVEN,my third is ONE and not in two,my fourh is in BUN and also in FUN,my last is in STAR but not in RADAR,i am a planet that moves round the sun.name the planet.
  21. science

    Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e
  22. science

    Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e
  23. science

    Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e
  24. PHYSICS ---HELP!

    A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
  25. Physics Help!!

    A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
  26. Trigonometry

    The Chrysler Building casts a shadow approximately 130 feet long on the street when the Sun's rays form an 82.9 angle with the Earth. Approximately how tall is the building? Round you answer to four decimal places.
  27. physical science

    How many hours are required for a radio signal from a space probe near the dwarf planet Pluto, 6.00 x 10 (to the 9th) km away, to reach Earth? Assume that the radio signal travels at the speed of light, 3.00 10 (to the 8th) m/s.
  28. health physics

    Assuming that at the beginning of time (big bang; creation of the universe) there were equal numbers of U-235 and U-238 atoms produced, estimate the age of the Earth (using terrestrial U-235 and U-238 abundances).
  29. chemistry

    space probe Pioneer 11 was lanced April 5, 1973, and reached Jupiter in Dec.1974 traveling a distance of 998 km. How long did it take an electromagnetic signal to travel to earth from pioneer 11 when it was near jupiter?
  30. DUMANGEZE

    A 0.04KG BEAD SLIDES ON A CURVED STARTING FROM REST AT POINT A.THE EARTH FROM A AND B IS FRICTIONLESS ,WHILST THE PATH FROM B TO C IS ROUGH.IF THE BEAD ARRIVES AT POINT C WITH A SPEED OF 1M/S DERTIMINETHE AMOUNT OF WORKDONE BY THE FRICTIONAL FORCE IN PASSING FROM B TO C?
  31. world history

    With the adoption of Christianity by Constantine, the emperor A. stopped using images of pagan gods. B. ended pagan rituals and ceremonies. C. was no longer worshipped as a god. D. was called God's deputy on Earth. im not sure its it B or D
  32. Physics

    If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.35 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2? b) (b) Repeat for Mars, where the acceleration due to gravity is 0....
  33. physics

    (a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.43 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2? m (b) Repeat for Mars, where the acceleration due to gravity is...
  34. Math/Trig

    An airplane leaves an airport and flies due west 150 miles and then 170 miles in the direction 210°50'. Assuming the Earth is flat, how far is the plane from the airport at this time (to the nearest mile)
  35. earth science

    what would be the chart to use for carbon 14 whcih has a half life of 5730 years and a piece of wood which originally has 12 grams pf radioactive isotope; If the half lives occurred and now has 0.75 grams left?
  36. English

    What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?
  37. Physics

    A400 N child is swing that is attached tow ropes 2m long , find the gravitational potential energy of the child-earth system relative to the red line level when ropes make an angle with the vertical .
  38. trig

    city a is 300 miles directly north of city b assuming the earth to be a sphere of radius 4000 miles determine the difference in latitude of the two cities make answers accurate to the nearest second
  39. Physics

    rotating space station has radius 1380 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh one-half their Earth weight?
  40. Science

    How can volcanic eruptions change the surface of the earth? by creating large deposits of coal by creating new islands and land by lowering land levels several feet by decreasing the level of the ocean I think its C
  41. Science

    1. Which of the following about the suns structure is true? A.The sun has a solid surface. B. The sun has an interior and an atmosphere. * C.The sun's is similar to Earth's; it has a core, mantle, and crust. D. The sun's outermost layer is called the radiation zone.
  42. Sociology

    Soot plays an important role in climate change, but ______ is still the leading cause of Earth's changing climate. A. acid rain B. nitrous oxide C. carbon monoxide D. carbon dioxide I can't decide between B and D
  43. science

    How can volcanic eruptions change the surface of the earth? A. by lowering land levels several feet B. by creating new islands and land C. by creating large deposits of coal D. by decreasing the level of the ocean i think its B
  44. LA

    Which excerpt from the play provides additional support for the correct answer to the previous question? A. Mrs. Frank. [To Anne] You're here, safe. You see? Nothing has happened. B. Anne. I'm a terrible coward. I'm so disappointed in myself. I think I've conquered my fear... ...
  45. Language Art's

    2.)Which excerpt from the play provides additional support for the correct answer to the previous question? A.)Mrs. Frank. [To Anne] You're here, safe. You see? Nothing has happened. B.)Anne. I'm a terrible coward. I'm so disappointed in myself. I think I've conquered my fear...
  46. Physics

    A 3.79 kg ball is dropped from the roof of a building 163.8 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 11.5 N on the ball. How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of s.
  47. Chemistry/stoichiometry

    For the reaction shown, calculate how many moles of NO2 form when each amount of reactant completely reacts. 2N2O5g = 4NO2g+O2g I am assuming that the first question must be converted to grams and the second question must be converted to kilograms I just need to know how to ...
  48. math

    at 7:00am joe starts jogging at 6 mi/h. at 7:10 am ken starts after him. how fast must ken run to overtake joe at 7:30am? If Joe runs at 6 mi/hr for 30 minutes (7:00 to 7:30), his distance traveled is 6 mi/hr x 0.5 hr = 3 miles. Ken starts at 7:10 and runs until 7:30 for a ...
  49. Physics

    Two hikers, Alisha and Caleb, are resting on a hillside; the hill has a slope of 30 degrees, and Caleb is sitting above Alisha, eight meters away. They’ve brought fruit to eat on the trail, but they want to trade. a) Caleb throws an orange down to Alisha, with its initial ...
  50. Geography

    Need help with this: The following ten countries are choices: Senegal Ghana Nigeria Congo the Central African Republic Zambia Zaire Botswana Mozambique Zimbabwe Use the hints to find out which country they are talking about: 'One, the country must have a major river that does ...
  51. Calculus

    A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the least amount of ...
  52. science

    list 5 things plants must do to survive on land
  53. Algebra

    What values for x, if any, must be excluded in each of the following algebraic fractions? 1.17/x 2.3/(x-2)= 3.3x/((x+1)(x-2))= 4.(2x-1)/(3x^2+x-2)
  54. LANGUAGE

    A PEEL OF A BANANA (TWO WORDS,MUST RHYME)
  55. LANGUAGE

    A SAD FRUIT (TWO WORDS, MUST RHYME)
  56. science

    why most living things must have air?
  57. physics

    Why must the spectrometer be aligned each time a grating is replaced?
  58. law ethics in medicine

    when must employee be trained in a hipaa
  59. ecology

    Why must a producer be at the base of every food chain?
  60. History

    What does Jefferson mean by we must resort to manufacturing out
  61. physics

    the oxidation numbers of the elements in a compound must add up to
  62. physics

    the oxidation numbers of the elements in a compound must add up to what
  63. Math

    If qrs / r = s and the value of q is 0, which of the following must be true? Explain why. a) r = 0 b) s = 0 c) s / r = 1 d) qr / r = 1 e) s = 2r
  64. math

    using 1,2,3,4 only one time and must equal 29
  65. chem

    What must be the molarity of an aqueous solution of NH3 if it is 4.2% ionized?
  66. chemistry

    if 23 g of Fe2O3 formed, how many grams of Fe must have reacted?
  67. chemistry

    How many grams of NaCl must react to produce 1.00 g Cl2?
  68. chemistry

    the solubility of MG(OH)2 is 0.61 g/L What must be the PH of this solution. and thx dr. bob for last question
  69. Chemistry

    What must be the pH of a solution that is 0.049 M Fe3+ to just cause Fe(OH)3(s) to precipitate?
  70. chemistry

    What volume of 12 M HCL must be diluted to make 2L of solution with pH of 4?
  71. chemistry

    What must be the pH of a solution that is 0.067 M Fe3+ to just cause Fe(OH)3(s) to precipitate?
  72. statistics

    What type of data must you collect to conduct a t-test? Why?
  73. science

    In order for conduction to occur particles must make what?
  74. chemistry

    what difficulty must be overcome when mixing water and margarine? why?
  75. Statistics

    What type of data must you collect to conduct a t-test? Why?
  76. math116

    -8x-27=-32 1/5 the solution must be in the form as an integer or simplified fraction. Thank you.
  77. chemistry

    how many grams of CaCl2 must be dissolved to make 2.15 L of 0.05020 M Cl
  78. chemistry

    how many grams of CaCl2 must be dissolved to make 2.15 L of 0.05020 M Cl
  79. Geometry

    In Triangle SUM, if SU = 10 cm and UM = 15 cm then MS must be less than how many centimeters? 10 15 20 25...... Am I right?
  80. math

    how many times must the number 5 be subtracted to find the quotient of 5/5?
  81. Calculus

    Let If f(x) is a function which is continuous everywhere, then we must have m=________________
  82. Statistics

    What type of data must you collect to conduct a t-test, why?
  83. statistics

    What type of data must you collect to conduct a t-test, why?
  84. CHEMISTRY

    HOW MANY MG OF C2H4 MUST BE USED TO PRODUCED 875J OF HEAT
  85. Chemistry

    What acid and base must react to form Na3PO4?
  86. Chemistry

    At what speed must a neutron travel to have a wavelength of 9.2 pm?
  87. math

    to subtract 4 5/6 from 10 1/2, you must renamed the mixed number 10 1/3. How do you rename the 10 1/3?
  88. Chemistry

    What must be the molarity of an aqueous solution of trimethylamine, (CH3)3 N, if it has a PH=11.20?
  89. physics

    How much work must be done on a 8.0 kg ball to give it a velocity of 36 m/s?
  90. HVAC

    Why must all valves be open when an evacuation is performed?
  91. gov.

    An economic system must provide the answer(s) to what question(s)?
  92. science

    What cellular structures must an angiosperm have to survive?
  93. calculus

    If f and g are two functions for which f' = g and g' = f for all x, then prove that f^2 - g^2 must be a constant.
  94. Chemistry

    How many milliliters of 2.50 M KI must be diluted to make 365 mL of 0.432 M KI?
  95. proble solving

    what must be added to 346 to make 775
  96. Biology

    What three things must be known to perform radiometric dating?
  97. English

    what is the noun fuction of He must like studying calculus.
  98. science

    According to the HIPAA Security Rule, organizations must:
  99. mathematics

    how many terms in the series 18-16-13-....must be added to give a sum of 44?
  100. statistics

    a resturant must choose 5 employees from 12 applicants. in how many ways can they do that?
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