1. Geography

    During the formation earth , from where does the water came ?

    asked by Tamaq on October 6, 2016
  2. physical science

    can volcanoes form anywhere on earth why or why not

    asked by devon on May 12, 2009
  3. 3rd grade

    how faraway is Pluto from Earth?

    asked by ma18 on September 25, 2010
  4. science

    how did the miners of chile get into the earth

    asked by theresa on December 5, 2010
  5. science

    how does the miners jobs help the earth

    asked by theresa on December 5, 2010
  6. science

    what planet has almost the same density as earth?

    asked by Aaron a.k.a A7X on January 4, 2010
  7. science

    When is the Earth farthest from the sun?

    asked by Joe on January 5, 2010
  8. science

    explain why earth has a moon

    asked by polly on December 4, 2008
  9. science

    What is the force of gravity on earth?

    asked by Taylor on September 27, 2008
  10. Astronomy

    The precession of the Earth its causes, and its ramifications

    asked by b on March 27, 2010
  11. physical geography

    what are the five most important paralells of the earth?

    asked by Anonymous on September 2, 2008
  12. science

    Most of Earth's rain and snow comes from where?

    asked by Tiffany on May 1, 2008
  13. physics

    How far from Earth will Venus be today?

    asked by Ann on February 16, 2014
  14. science

    What do earth`s plates float on?

    asked by Sarah on January 26, 2010
  15. Physics

    What's earth's rotation period?

    asked by Thi on January 12, 2011
  16. earth science

    how do the four subsystems of earth interact with one another

    asked by shaquetta on January 8, 2010
  17. science

    What are some causes for the changing of Earth's surface?

    asked by Anonymous on January 11, 2008
  18. physics

    in the model ,how far away from the earth would the sun be?

    asked by jasmine on June 18, 2011
  19. social studies

    What are the names of the four hemisphere on Earth?

    asked by Elenny on September 14, 2008
  20. science

    ok earth science what is a solstice and why do we have them?

    asked by sammy on February 10, 2009
  21. science

    how are earth and venus similar

    asked by Star on October 25, 2018
  22. Science

    If we can't dig to the center of the earth, how do we know that is down there?

    asked by Anonymous on March 16, 2011
  23. science

    which of earth's spheres extends into all others

    asked by ben on November 11, 2009
  24. science

    What causes daylight and night on Earth?

    asked by Detria on November 17, 2008
  25. science

    where does the earth loose energy to ??

    asked by destiny on October 18, 2012
  26. science

    why does the moon have more craters than the earth?

    asked by nicole on April 11, 2011
  27. science

    Is there any stars between the Earth and the Moon?

    asked by sanjay on January 9, 2015
  28. Science

    What do the importance of water on earth?

    asked by Jamie on November 29, 2018
  29. science

    at what altitude the value of g becomes 3/4 of its value on the surface of earth ?

    asked by aimen on February 25, 2014
  30. Science

    What is the lowest atmosphere on earth?

    asked by Chuang on October 27, 2015
  31. science

    The Earth is a satellite of the sun? If not can you tell me what it is?

    asked by ilikezackalot on January 31, 2014
  32. Please help me think of a thesis statement

    on how humans are destroying the earth.

    asked by Jan on June 3, 2009
  33. Science

    what is the distance above Earth's surface?

    asked by Judah on March 19, 2015
  34. Science

    Why are there so many different species on earth today?

    asked by Sue on February 23, 2016
  35. physics

    at what attitude the value of g would become one forth than on the surface of the earth?

    asked by zoya on May 15, 2016
  36. physics

    what is gravitational field of the earth?

    asked by kavya on February 2, 2017
  37. Science

    What are some bad things on Earth ?

    asked by amoura on September 24, 2010
  38. 4th grade Science

    How is the composition of Uranus different from Earth?

    asked by Hayley on November 30, 2009
  39. project

    save the earth with picture

    asked by nilavra nandy on May 20, 2008
  40. Science

    When did our Earth form to a planet? =]

    asked by Katie on March 20, 2008
  41. social studies

    How much of the earth's surface is water?

    asked by Erin :) on October 4, 2012
  42. 3rd grade

    how many miles is Jupitor from Earth?

    asked by ma18 on September 24, 2010
  43. science

    How Do the Earth's Four Subsystems Work Together?

    asked by LESTER on June 29, 2016
  44. Earth Science

    Why does the Earth have a magnetic field?

    asked by Alexgc on February 24, 2015
  45. Science

    Which of Earth sprees contain most of the mass?

    asked by Mark on October 22, 2015
  46. astronomy

    on which planets would you weih more than on the earth?

    asked by joe on April 11, 2009
  47. Science

    Why is the earth's temperature different in different places?

    asked by Beth on March 13, 2008
  48. space

    how many planets are smaller than earth

    asked by michael on March 4, 2008
  49. Academy of Hospitality and Tourism at Erasmus

    What is the earth science tables?

    asked by Sharina Summers on November 20, 2009
  50. math

    If I am 11 years old on Earth,how old will I be in Mercury?

    asked by aglay on December 6, 2010
  51. science

    where on earth is silver found? Thanks!

    asked by Taavon 10 on November 7, 2010
  52. science

    will earth get smaller in the future?if does why?

    asked by yin on September 17, 2009
  53. Earth Science

    Why are there so many different species on Earth today?

    asked by Mike on February 22, 2016
  54. Science

    Which of earth's layers contains the most mass?

    asked by The Official Pancake Queen on December 16, 2010
  55. physics

    At what altitude the value of g becomes 3/4 of its value on the surface of earth?

    asked by aimen on February 25, 2014
  56. Geography

    The study of the earth and its features

    asked by Alexis on August 15, 2017
  57. astronomy

    on which planets would you weigh nearly the same as on earth?

    asked by joe on April 11, 2009
  58. Sciences

    Will al earth’s resources last forever?

    asked by Prarthana on November 23, 2017
  59. Kumar

    What is the life of earth ? explain and why?

    asked by Raj on December 10, 2016
  60. Chemistry

    In a certain experiment, when light of wavelength 570 nm is directed on to the photocell, electrons are emitted at the rate of 6.6 10-13 Coulombs/sec. Assume that each photon that impinges on the photocell emits one electron. How many photons per second

    asked by Brandon on October 24, 2011
  61. Physics. Free electron density, please help!

    A length of wire has a radius of 3.00 × 10-3 m and a resistance of 0.200 Ω. When the potential difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 × 10-4 m/s. On the basis of these data, calculate the density of free

    asked by samantha on November 22, 2012
  62. Chemistry

    When light of a wavelength of 125 nm strikes a certain metal, electrons having a velocity of 8.2 x 10^5 m/s are emitted from the surface of the metal. What is the threshold frequency of the metal? The answer is 1.9 x 10^15 s^-1 I'm not sure how to do this.

    asked by Shaniquaa on December 7, 2008
  63. Chemistry

    In a certain experiment, when light of wavelength 570 nm is directed on to the photocell, electrons are emitted at the rate of 6.6 10-13 Coulombs/sec. Assume that each photon that impinges on the photocell emits one electron. How many photons per second

    asked by Brandon on October 24, 2011
  64. Math

    Is your weight on different planets affected by gravity an object that weighs 150 pounds on Earth weighs only 56.55 pounds on Mars the same object weighs only 24.9 pounds on the moon what percent of an object Earth weight is its weight on Mars and the Moon

    asked by Anais on October 10, 2016
  65. social studies

    1. How did agriculture change the lives of early South American people? A. People competed over crops. B. People no longer needed to hunt. C. People became nomadic. D. People began to settle in one place.********* 2. Which of the following is an example of

    asked by bananamouse on December 5, 2018
  66. Chemistry

    Draw a bohr diagram of the protons and electrons in each of the following: The ionic compounds lithium fluoride, LIF, and beryllium chloride, Becl2. Do I draw these 2 compounds separately, and I'm unsure of how.

    asked by Derrick on July 8, 2010
  67. Physical Science

    Diamond is a covalently bonded substance made of pure carbon. Each carbon atom has six total electrons so this means carbon shares ________ electron(s) with other carbon atoms. A) one B) two C) four D) six Help Please!

    asked by Ben Dover on June 1, 2016
  68. Physical Science

    Hello, Can some one please tell me if I have the correct answer? Thank You my answer: D In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the? A.anode B.cathode C.deflecting plate D.grid

    asked by Mandi on March 24, 2008
  69. chemistry

    Light with a wavelength of 405 nm fell on a strontium surface, and electrons were ejected. If the speed of an ejected electron is 3.39 105 m/s, what energy was expended in removing the electron from the metal?

    asked by Anonymous on November 13, 2010
  70. chemistry

    I have to answer this question for chemistry. It deals with ionic compounds, like how when an atom loses or gains electrons, energy is involved. So the question is Would the same amount of energy that's taken, be given off? (lost/gained)

    asked by lola on October 21, 2009
  71. SCIENCE

    How do you figure out the following ..?::::: Mass Number Number of Protons Number of Electrons (OF A ELEMENT) Number of Neutrons Thanks ~ Courtneeeey (:

    asked by Courtney on September 6, 2011
  72. earth science

    If an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons.

    asked by johnathan on September 24, 2010
  73. Science

    When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A. +2 B. -1 C. -2 D. +1

    asked by Jamal on May 24, 2015
  74. Physics

    the charge on a pith ball was measured as +40 nC. if the charge on an electron is -1.6 x 10^-19, how many electrons have been added or removed from the ball?

    asked by Elena on January 31, 2015
  75. Astronomy

    What percentage of the energy budget do electrons occupy? Take the energy budget occupied by matter to be 4.4%. (a) 3.9% (b) 0.1% (c) 0.03% (d) 0.002%

    asked by qwerty on October 1, 2013
  76. Physics

    Work Function 1 > Work Function 2 In which case will the Kinetic energy of the emitted electrons be greater ?

    asked by Minhye on February 2, 2016
  77. chemistry

    A scientist discovers that an atom with a mass number of 14 contains eight electrons. According to the scenario, what is the atom's atomic number? 22 6 8 14 please help

    asked by Anonymous on August 24, 2017
  78. physics

    Two separate seismograph stations receive indication of an earthquake in the form of a wave traveling to them in a straight line from the epicenter and shaking the ground at their locations. Station B is 60 due east of station A. The epicenter is located

    asked by sammy on September 30, 2012
  79. Geography

    Where on Earth? Postcards form Europe Your neighbors, the Wiltons, have gone away on vacation to Europe. Before they left, Mrs. Wilton told all fo the neighbors, "We'll be sending lots of postcards. Try to figure out where each card came form. If you do,

    asked by y912f on February 15, 2010
  80. Classification

    what's the full classification for humans, and dandelions? thanks http://www.sidwell.edu/us/science/vlb5/Labs/Classification_Lab/Eukarya/Animalia/Chordata/Vertebrata/Mammalia/Primates/Hominidae/Homo/Sapiens/

    asked by Flo on July 4, 2005
  81. Motion Problems

    A satellite which travels around the earth has a power supply that provides power according to the formula: P =(17200)/(t + 100) where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in

    asked by Brownie on January 29, 2013
  82. Physics Homework

    Could you please check my answers? Thanks! 1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No,

    asked by Soly on September 12, 2007
  83. coulomb law and gauss law Physics

    Two negative particles of charge=-Q and mass=rn orbits a stationary, positive particle of charge=+2Q at a radius= R' They are always at diametrically opposite points on the orbit. a. Find the total inward Coulomb force on one negative particle. b. Write

    asked by Pascual on October 20, 2008
  84. Geography

    These are my already asked questions that I didn't find an answer to [I'm not sure why] Can someone please help with them, because my exam's due monday. 2. How has human settlement affected the natural vegetation of Western Europe? a. People have carefully

    asked by mysterychicken on October 3, 2009
  85. Chemistry

    Atoms of ionized lithium gas (Li2+) are struck by neutrons moving at a velocity of 1.46e5 m/s. Calculate the shortest wavelength in the emission spectrum of Li2+ under these circumstances. You can assume that all electrons start in the ground state.

    asked by Sam Chem on March 22, 2013
  86. Science( please help)

      In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the  A. cathode. B. deflecting plate. C. anode. D. grid. ? The part of the atom that accounts for electricity is the  A. nucleus. B. electron.

    asked by Brooklyn on February 26, 2016
  87. Chemistry

    What properties differ between the elements in the akali metals and the elements in the akaline earth metals? The akali metals have a charge of 1+, and the akaline earth metals have a charge of 2+.

    asked by Anonymous on September 14, 2010
  88. history

    thank you so much... what countries in asia have communist goverments? China, North Korea, Vietnam, Laos.

    asked by ashley on May 18, 2007
  89. History to 1877

    What British Legislation regulated the import of world wide goods into North America

    asked by Adelina on January 22, 2009
  90. science(please help)

    which way does the colorado river flow, from the north canyon to the nankoweap or vice versa? how do u know?? i need this by tomorrow

    asked by kelly on October 1, 2007
  91. History

    Who would support the decision of changing slavery, North, some Southerners, or both? REMEMBER, THINK LIKE A PERSON FROM 1815..

    asked by Nicole on April 27, 2013
  92. physics

    Resultant displacement from 12m east to5m north to9m vertically upward

    asked by gallium on August 14, 2011
  93. 8th grade, history ?#5

    What type of relationship exsited between the spanish and native americans living in north america?

    asked by Debra on October 11, 2008
  94. math

    If facing north east then turn anti clockwise 135 degrees what position would i be

    asked by angela on September 12, 2016
  95. trigonometry

    a motor boat moves in the direction of N 38° E for 3 hrs at 20 mph. How far north and how far east does it travel?

    asked by rica on January 3, 2015
  96. History

    in the 1500s, Europeans began exploring large areas of North America. What were some of the causes for their exploration?

    asked by Anonymous on December 3, 2013
  97. world history

    how do you compare north american and latin/carribean racial ideologies from 1500-1830?

    asked by alexis on October 4, 2009
  98. history

    what were the two major religions represented in north america this time.?how did these relogions influence the war

    asked by nanii on September 29, 2015
  99. World History

    in the 1500s, Europeans began exploring large areas of North America. what were some of the causes for their exploration?

    asked by Anonymous on December 3, 2013
  100. grade 9 physics

    A runner jogs 12km North then turns and runs 16km East three hours

    asked by mesfin on November 3, 2017