1. Science

    what the definition of age range in earth science?
  2. physics

    realation between earth gravity and moon gravity
  3. earth

    What is an elipse of the sun and what is lunor elipse of the moon
  4. Science

    Is the near side (facing earth)always the dark side?
  5. earth science

    What does -morph stand for in science terms?
  6. Tides

    What astronomical bodies are most responsible for the tides on earth?
  7. Science

    If a man has a mass of 90 kg on earth, what is his mass on the moon?
  8. physics

    How does your mass on Earth compare to your mass on Mars?
  9. Physics

    The Moon's period of revolution around the Earth is 27.3 d. How far away is the moon?
  10. social study

    what five themes do geographers use to study the earth?
  11. Earth science

    what are the causes of groundwater contamination? How can you stop the contamination?
  12. Geography

    which layers of the earth move? Why do ther move?
  13. science

    these are all very confusing for me 1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this
  14. physics 133

    1 Which of the following is the correct unit of k in the equation of a damped harmonic oscillator given as , where b is the damping factor and all the symbols have their usual meaning? 2 If s is distance and t is time, what must be the dimensions of a and
  15. Social Studies

    1.Which of the following was NOT a reason why early Europeans came to America? A.to determine if the earth was round B.to bring glory to their respective nations C. to find silver and gold D.to explore new lands My answer D?
  16. science

    scientists believe that the waters covering the surface of the earth. a)are a recent addition to our planet b) first appeared during the age of dinosaurs c) have been here since the crust solidified d) are slowly drying up e) are not visible from space c
  17. physics

    the gravitational field strength at the earth's surface is 10n/kg. calculate the wight of the following: A. a person of mass 80kg B. a 2kg bag of sugar C. a 125kg pack of tea
  18. biology - natural selection

    Which of these is the foundation for relative dating? A. Earth is very old. B. Deeper rock strata are older. C. Radioisotopes decay at a constant rate. D. Organisms can be closely related to each other.
  19. science

    Scientists believe that the waters covering the surface of the earth? a) are not visible from space b) are slowly drying up c) first appeared during the age of dinosaurs d) are a recent addition to our planet e) have been here since the crust solidified
  20. Astronomy

    The gravity lock of the Moon to Earth is silimar to the action of a A) giant pendulum B) spinning top C) master key D) tidal wave E) magnetic compass I'm torn between A and E.
  21. Science

    What does Asimov predict will happen to earth in billions of years? a. it will be burned up by the sun b. its population will increase*** c. it will shrink slightly in size d. it will change position in the galaxy Am I correct?
  22. Science

    Why is the human population of the Earth still growing rapidly even though birth rates have begun to fall slightly? Due to better health and medical advancements, people are living longer.
  23. earth

    Why does western North America have volcanoes, earthquakes, mountain ranges, and small valley glaceiers and why are these same features not present on the eastern part of the continent? How could this situation be reversed?
  24. Trig

    mercury rotates around the sun in approx. 89 earth days (or 7,689,600 s. use a calculator to approximate its angular speed. choices: 4.09x10^-7 0.035 0.071 8.17x10^-7
  25. PHYSICS

    The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below?
  26. physics

    Use the period of the earth (2.34 y), its mean orbital radius (1.496 × 1011 m), and the universal gravitational constant (6.673 × 10−11 N · m2/kg2) to calculate the mass of sun. Answer in units of kg.
  27. geography..please check my answers!!!

    which pair of basic questions guides geographers in their work? where are things located? and Why are they there? **** What is the climate? and Why was it changed? When did Earth form? and What is it made of? Who lived where? and When did they move?
  28. Earth Science

    Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response.
  29. science

    tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had sunlight 24 hours a day. Include such things as how this would affect your sleep, work, school and crime.
  30. Geography and Society

    What is the primary function of Earth's atmosphere? a. to trap heat from the sun b. to shield the planet from harmful radiation*** c. to disintegrate space debris before it reaches the surface d. all of the above
  31. Earth Science

    Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response. THANKS
  32. physics repost

    If Earth shrinks in size such that its shape and mass remain the same, but the radius decreases to 0.21 times its original value, find the acceleration due to gravity on its surface. (6378.1/0.21)(9.80) = 2.97 m/s^2
  33. Biology

    Some questions on a review that I have no idea! Describe what the earth looked like when it first formed? Why was the presence of oxygen so important keep in mind aerobic,anaerobic respiration and the amount of ATP produced?
  34. Science

    Which of these would cause a rapid change in the appearance of the Earth's surface? A. Erosion and deposition by a river B. Earthquake C. Summer waves on Galveston's beach D. Weathering of rocks by acid rain
  35. Physics

    please check: 1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall. STRAIGHT DOWN 2. Which is the force of an acceleration? FORCE 3. A free-body diagram of a ball falling in
  36. Physics

    On the moon's surface, the force of gravity exerted by the moon on a camera is 2.4 N. What is the force of gravity exerted by the moon on the camera when it is in orbit with a radius = to twice the moon's radius?
  37. Earth Science REPOST

    A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
  38. earth comm fluid and spheres science

    can someone explain the relationship between ocean circulation patterns during an el nino event and atmospheric circulation?
  39. physics

    A football on the moon (1/6 earth's gravity) is kicked straight up with an initial velocity of +14.5 m/s. If it starts 2.7 m above the surface, how much time has passed until it is 16.8 m above the surface and on its way down?
  40. science

    A total solar eclipse means that no sunlight reaches a certain area on earth. true false Just need to know if my answer or right or wrong. Thanks! :) true
  41. Phsics

    A man weighs 772 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N
  42. Science Earth

    Guard cells are closed during the night. This means that no gases can come in or out of the stomata. Why would the plant not need to take in gas during the night? How can I answer in this question?
  43. SCIENCE ASAP HELP PLEASE

    which of the following features make earth and venus similar to each other ? A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****
  44. Science

    If an astronaut could hop 40 cm high on Jupiter, how high could he or she jump on earth? On the moon? Please help me fast I have a bunch of questions over this and I have no idea what this even means
  45. physics

    You fire a cannon ball from ground level at a speed of 20.0 m/s ∠30.0 Find the time taken for the ball to hit the earth. How far will it land?
  46. Earth

    So how long will global warming last for in the future? Remember the movie, "The Day After Tomorrow"? The whole world might experience all those disasters depicted in the movie.
  47. Physical Geology

    The Earth is a sysytem that is comprised of four subsystems. How do these four subsystems interact with one another? And identify one type of resource from each subsystem on which people depend.
  48. Science

    which of the following features make earth and venus similar to each other ? (1point ) A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****
  49. Science

    Need help on the question below...I know it is not C or D The formation of metamorphic rocks depends on all of the following except a. the composition of parent rocks b. Earth's magnetic field c. temperature d. pressure Thanks
  50. Earth's Dynamic Atmosphere

    The only substance that exists in the atmosphere as a solid, liquid, and gas is A. glucose. B. water. C. oxygen. D. nitrogen. My answer is b.
  51. science

    A total solar eclipse means that no sunlight reaches a certain area on earth. true false Just need to know if my answer or right or wrong. Thanks! :) false
  52. earth science

    what class of minerals contains the element oxygen bonded to a metallic element http://en.wikipedia.org/wiki/Iron_oxide
  53. physics

    A boy has mass 80kg when resting on the ground at equator. what will be the centripetal acceleration on boy if radius of earth is 6.4×10 power 6 meter
  54. Physics

    If you throw a 36 kilogram rock off a cliff , how fast does it accelerate to the ground? The earth excerts a force of 200 Newtons on the rock.
  55. science

    For any mass m located anywhere in the universe, F=mg is the formula that tells the gravitational attraction between m and the earth, true false Just need to know if my answer or right or wrong. Thanks! :) False
  56. Earth Science

    As a star ages, its internal composition changes as nuclear reactions in the star's core convert one element into another. True or false?
  57. Science

    which of the following features make earth and venus similar to each other ? (1point ) A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****
  58. Physics

    An 8.0-kg history textbook is placed on a 1.25-m high desk. How large is the gravitational potential energy of the textbook-earth system relative to the desktop?
  59. physics

    Estimate the average speed of the apollo spacecaft in m/s, given that the craft took five days to reach the moon from eaeth .the moon is 3.8*10 to the power 8m from earth.
  60. science

    according to wegeners hypothesis of continental drift ? A. Earths surface B. The continents C. Earth is slowly cooling and shrinking D. The continents joined
  61. science

    Heat and pressure change rock inside the earth crust into gneiss. What type of rock result. Is the answer igneous
  62. Science

    For any mass m located anywhere in the universe, F=mg is the formula that tells the gravitational attraction between m and the earth, true false Just need to know if my answer or right or wrong. Thanks! :) False
  63. math

    One estimate for the distance from earth to the andromeda galaxy is 2,400,000 light years. What is this distance expressed in scientigic notation?
  64. phyics-universal gravity

    A hypothetical planet has a radius 3.3 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? (downward)
  65. Astronomy help

    If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation
  66. AP physics

    The sun is below us at a magnitude of nearly a line with the earth center. Are we then Heavier at midnight due to the sun's gravitational force on us, than we are at noon? Explain
  67. science

    The thin, outer layer of the earth's surface is its_____. a) skin b)crust c) core d) soil e) surface Just need to know if my answer or right or wrong. Thanks! :) b
  68. Earth's Dynamic Atmosphere

    Which of the following is the most common gas in the atmosphere? A. Oxygen End of exam B. Methane C. Carbon dioxide D. Nitrogen my answer s d.
  69. physics

    If a person pushes on a block and it travels a distance of 6.0m before stopping. How far would the block travel if it were pushed with the same force, but on the moon(which has 1/6 of the earth's gravity).
  70. Physics

    A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
  71. phys

    While spinning in a centrifuge, a 70.0 kg astronaut experiences an acceleration of 5.00 g, or five times the acceleration due to gravity on the earth. What is the centripetal force acting on her?
  72. PHYSICS

    Suppose you are in a spaceship in freefall between Earth and the moon. How could you distinguish between a lead brick and an ordinary brick if you were blindfolded and wore gloves?
  73. Astronomy

    If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation
  74. Physics

    A man weighs 1220 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N.
  75. Overdue Science Lesson, Very Urgent.

    1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. 2,
  76. Science--Help.

    Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon calcium iron 3. The central
  77. physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 9.8%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  78. physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 9.8%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  79. Physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 28.2 %. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  80. Physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 47.9%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  81. Microeconomics Assignment

    Ok i have this assignment to do and i just can't seem to do it, the question is I have to find a news article that would be a good example of some kind of competition among firms in any goods or service industry. Can't someone please help me find a
  82. Earth/Environmental Science

    _______ currents are currents that involve warm water flowing in different directions at different speeds close to the top of oceans.
  83. Optics

    Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm ( Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the earth).
  84. Physics

    Calculate the weight of an astronaut whose mass (including spacesuit)is 72kg on the surface of the moon? What is the astronauts weight on Earth? Comment on the difference
  85. earth science

    surface ocean currents located at 40 degrees south latitude 90 degrees west longitude generally flow toward the northeast?
  86. 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
  87. pre calculus

    Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x^2+y^2-12x-4x+36=0 How on earth do I do this?
  88. astronomy

    If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters.
  89. Physics

    suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem?
  90. Biology

    Explain the structure of a water molecule and how hydrogen bonding leads to some of its very special properties. Be sure to include how these properties are important to life on Earth
  91. physics

    ( If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 1.33 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?
  92. Physics

    The acceleration due to gravity on the Moon is 1/6 of that of the Earth. Given the same initial velocity: How much higher will an object displace on the Moon? How much more time will it spend in the air?
  93. Geography

    The most accurate way to show Earth's continents and bodies of water is with a(an)? 1) Mercator projection 2) globe 3) Robinson projection 4) equal-area map I think #3
  94. science

    A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
  95. physics...

    T^2=((4pi^2)/(GM_E))r^3 Substitute the period in seconds, T = 86,400 s, the gravity constant G = 6.67 multiplied by 10-11 kg-1 m3/s2, and the mass of the Earth, ME = 5.98 multiplied by 1024 kg. Solve for r.
  96. Science

    The geologic time scale originally ordered earth's rocks by? a) Absolute age. b) Relative age. c) Composition. d) Decades and centuries.
  97. Forces Within and Deciphering Earth's History

    Which of the following time spans represent the greatest length of time? A. Era B. Eon C. Period D. Epoch my answer is b.
  98. Algebtra

    from 630 feet at the top of the horizon. Due to the curvature of the earth how far away is the city. using d=sqrt[3h/2] where d is the distance in nautical miles and h is the height in feet.
  99. science

    Using this concept, what role do we each play in sustaining life on Earth? How do our food choices affect our own consumption of the nonrenewable energy available to sustain life?
  100. Earth Science

    an evidence is a material or data that can be measured and tested to verify their prediction so wat is the difference between evidence and scientific inquiry\ plz help and thank you