1. physics

    How might you determine the age of a star from an Earth-based telescope? What measurements might you make?
  2. 4th Grade Science

    How much time will it take for Earth to reach the opposite side of the Sun?
  3. space

    in whgich group are the spheres of earth listed in order of increasing density?
  4. Earth and Environmental Science

    The solar wind can be thought of as evidence for which theory of light?
  5. physics

    A person can jump to a height of 1.5m on surface of earth. Find the velocity with which he jumps.
  6. earth space science

    how are each of the air masses related and/or different from each other? Are you talking about the various layers of the atmosphere?
  7. science

    how do hydrogen bonds relate to the transfer off heat from the equator towards the poles of earth
  8. Earth Science

    Develop a presentation on two ways technology has built on scientific knowledge?
  9. Physical Science

    Explain the importance of the water cycle to survival of the earth's organisms?
  10. Earth Science

    1Organizing information in a meaningful way is an example of (1)prediction (2)measurement (3)observation (4)classification (4), right?
  11. Earth Science

    Two meanings for the horizontal lines on the geologic History NYS chart.
  12. science

    what is the phsical layer of earth that is dividedunto tetonic plates is called the _____________
  13. Chemistry

    5. The elements are related by properties in groups.- F? 7. In Earth's environment, hydrogen is a metal.- T? Thanks -MC
  14. Geography.

    How does the tilt of the earth's axis explain changes in temperature from one season to another in the temperate zone?
  15. Earth Science

    What are the minimum and maximum durations of daylight at a latitude of 39 degrees north? Thanks.
  16. science

    If you Weighed 360 pounds on Earth with your space suit on, what would you weigh on the moon? Why?
  17. english 9th grade

    What are some symbols in 'a journey to the center of the earth' by jules verne
  18. 5th grade science

    What is the continous movement of water between Earth's surface and the air?
  19. earth space

    What man made or natural features can interfere with the weather radar?
  20. science

    what type of eclipse would you expect to see if the moon passes directly between earth and the sun
  21. physics

    A stone is dropped from a ledge 45m high. What will its speed on reaching the Earth be?
  22. science

    What is the magnitude of g at a height above Earth's surface where free fall acceleration equals 6.5m/s^2?
  23. earth science

    state the mostly reason for the differences in the weathering rate of the three rock materials
  24. earth Geology

    This is just a question that I was curious about, why do mountain belts run parallel to coastlines? Thanks
  25. English

    Do I need parentheses or dashes in this sentence? Copernicus as you might know. decided that the earth travels around the sun.
  26. Selamola secondary

    What is micro-organism that is regarded as non-living thing and its found only on Earth
  27. Science

    Explain- how would the gravitational force between Earth and the Moon change if the distance between them increased?
  28. earth science

    another name for the deep trenches long the edge of south america are called
  29. Earth Science

    Why is a minimum of three seismic stations needed to find the epicenter of an earthquake?
  30. english-what would you wish for

    This was the question of the day What would be one wish that you would wish for if you had a chance. I would wish for Earth to stay as our home forever. Can I have your outlook on this?
  31. earth

    please give me some important tips about a topic 'tiger in trouble'. I have to prepare a chart on this.
  32. biology

    would it be easier if someone who doesn't have proprioception to go to space and return back to earth to walk normally or would it be the same?
  33. science

    A falling star is really a ______burning up in the atmosphere of the earth. Just need to know if my answer or right or wrong. Thanks! :) meteor
  34. physics

    Calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5100 km above the earth's surface.
  35. Earth Science

    Why is a minimum of three seismic stations needed to find the epicenter of an earthquake?
  36. science

    1. Earth's capital includes all of the following except a. wildlife. b. nutrients. c. water. d. soil. e. sunlight.
  37. Living environment

    in what period of earth time did the great increase in animal diveristy
  38. Physics

    A projectile is shot straight up from the earth's surface at a speed of 1.20×104 km/hr. How high does it go?
  39. science

    The deepest layers of the earth is called the inner______. Just need to know if my answer or right or wrong. Thanks! :) Inner core.
  40. earth science

    What is the most abundant fossil fuel? A:Coal B:Gas C:Wood D:Oil
  41. science

    A falling star is really a ______burning up in the atmosphere of the earth. Just need to know if my answer or right or wrong. Thanks! :) meteor
  42. Physics

    What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?
  43. biology

    briefly describe the basic characteristics that all living things on earth have in common
  44. earth

    How do Plate tectonics affect the Atmosphere, Hydrosphere, Geosphere, and Biosphere? Thanks SO much in advance!:D
  45. science

    why is it important that the tumble dryer's plug has properly connected earth wire?
  46. surface processes on earth

    What is the most significant factor that ontros yhe development of soil.
  47. physics

    State how the centripetal force is provided in the case of a satelite orbiting the earth
  48. earth

    When combining atoms, how do i use the balloons and letter notations to show the product formed?
  49. physics

    How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?
  50. physics

    At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.60%?
  51. sience

    Which of the following can be expected to occur as climate change continues on Earth? HELPPPPPPPPPPP ASAP!!!
  52. PHYSICS

    At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.40%?
  53. science

    At the beginning of the____Era, the earth had no crust. Just need to know if my answer or right or wrong. Thanks! :) modern era
  54. Science

    green house effect influences the temperature on Earth because try not to give a link
  55. earth

    i have an acrostic poem i have to do for school on describing warm and cold fronts, but i can't think of some of the words
  56. science

    if Earth's axis were not tilted,could any area have both a hot summer and a cold winter?
  57. science

    Name some ways the wind and rain change the Earth's top layer(soil).tell why?
  58. physics

    If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s
  59. physics

    calculate angular momentum and rotational kinetic energy of earth about its own axis
  60. life science

    What is the highest point on earth, which is topped by Ordovician marine limestone
  61. wireless communications

    what is the period of the space shuttle traveling at 250km above the earth and what is its velocity
  62. algebra can somecheck my answers

    please check my answer thank you Write the phrase “the quotient of 3 more than a number, and 3 less than that same number. “ (x+3/(x-3) . It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number
  63. physics

    Which of the following are in equilibrium? A disc that is speeding up and is spinning up. A baseball that is at rest and has a constant angular velocity. A turntable that is at rest and is spinning down. A tire that has a constant velocity and is spinning
  64. physics

    Which of the following are in equilibrium? A disc that is speeding up and is spinning up. A baseball that is at rest and has a constant angular velocity. A turntable that is at rest and is spinning down. A tire that has a constant velocity and is spinning
  65. Anatomy and Physiology

    Hello! Thanks in advance for checking my question! ____ 3. Lacrimal bones form the walls of the (1 point) a) eyes. b) nose. c) mouth. d) ears. My Answer: A I'm not sure on this one, and the book doesn't have much information about it. The book says,
  66. geology

    1. What fraction of the Earth is made up of each of the major compositional layers: core, mantle, and crust? 2. What cities lie the same distance from our town as the boundaries of the following layers in the Earth lie from the solid surface? a. Base of
  67. science

    what is a earthquake look it up in a dictionary science is hard but hang in there If you want to read about earthquakes, an encyclopedia can give much information. Look on plate tectonics. The core of the earth is very hot and consists of molten magma.
  68. reading

    what this the answer for this question We can conclude from paragraph a)theories are often revised. b)theories are never modified. c)theories are always changed. d)theories are mostly illogical. The concept that the Earth is a sphere can be traced back
  69. Physics

    Suppose that a comet that was seen in 545 A.D. by Chinese astronomers was spotted again in year 1937. Assume the time between observations is the period of the comet and take its eccentricity as 0.11. What are (a) the semimajor axis of the comet's orbit
  70. Physics

    NASA lost contact with Pioneer 10 on January 22, 2003. How far in meters was it from the sun on that date? Pioneer 10 was traveling at 12.24 km/s relative to the sun. Calculate the position of Pioneer 10 as of January 2009 relative to the sun. Pioneer is
  71. 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
  72. physics

    As Newton showed, gravity is a force that acts along the line separating two bodies and causes the two bodies to be attracted to each other (i.e. it is a central force). In this problem, assume that the planetary orbits about the Sun are circular. a. Does
  73. ELA (English)

    And yet, Linenger recovered quickly. in fact, almost two dozen astronauts have lived in space for more than six months, and four have stayed in orbit for more than a year. These men and women faced the discomfort of weightlessness and overcame them and
  74. Science

    The geologic time scale originally ordered Earth's rocks by: A. absolute age B. relative age*** C. composition D. decades and centuries Where did scientists originally get their information to develop the geologic time scale? A. They collected and studied
  75. Astronomy

    Given that the mass of the Milky Way galaxy is 10^11 times that of the Sun and that the sun is 2.6x10^20 meters from its center, what is the Sun's orbital speed around the center of the galaxy? How long does it take the Sun to orbit the Milky Way? (In this
  76. Physics

    Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.80 x 10^11 m apart. The larger of the two stars has a mass of 3.50 x 10^30 kg, and its center is 3.00 x 10^11 m from the system's center of mass. What is the
  77. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?
  78. science

    on a planet whose mass is twice that of earth and whose radius is the same, with what acceleration will a body fall at sea level
  79. Science

    Describe the apparent motion of the stars and planets that is caused by the revolution and rotation of the earth.
  80. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?
  81. Chemistry help

    Write a descriptive text and a word equation on how silicon is extracted from earth's crust' .
  82. Earth Science

    18.   Which of the following is a factor that determines the composition of magma?  A. Texture B. Elasticity C. Color D. Viscosity  D or B?
  83. physics

    on a planet whose mass is twice that of earth and whose radius is same, with what acceleration will a body fall at sea level?
  84. science

    Both a globe and flat world map can model features of Earth. Give an example of when you would use each of these models.
  85. chemistry

    The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)
  86. science

    Why are the coldest temperatures at the 50 km height from the surface of the Earth, occur generally at tropical tropopause?
  87. physics

    The force produced by Earth's gravity on a 70 kg man standing on the moon is more than 0.5 N True or False?
  88. earth science

    how do we calculate or determine the distance to stars? what units do we use and what are the limitations (if any) of the method used for such calculations?
  89. Science

    A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?
  90. Physics

    how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth
  91. earth

    #15 The primary cause of crustal movement is_________ a.) conduction b.) convection c.) magnetism d.) radiation please help have no idea
  92. science

    find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.
  93. science245

    In genology (the earth) what are the two historical figures and the process of mantle convention and plate movement.?
  94. college physical science

    how much would a 80.0kg person weigh on earth where the acceleration of gravity is 1.63m/s2
  95. earth space science

    A substance that cannot be broken down into simpler substances by physical or chemical needs is called an
  96. Earth Science

       What element has 81 protons in the nuclei of its atoms?  A. Thallium B. Uranium C. Platinum D. Lead A?
  97. 7 Science

    If earth was larger what would happen to it's atmosphere? It would expand It would evaporate It would be sucked into space It would become more dense
  98. 4th grade science

    What kind of heat transfer cause Earth's najor wind pattern?
  99. science

    what is the largest layer of earth's surface , composed mostly of silicon,oxygen,magnesium,and iron
  100. physics

    Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help