1. civics

    Which of the following correctly describes an example of how climate affected the settlement in North America ? A. most of the United states settled in the Midwest, where temperatures are less extreme. B.Most of Canada's population lives along the southern

    asked by sam on June 4, 2014
  2. physics

    The De-orbit Burn The Shuttle must reduce its velocity at a pre-calculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the de-orbit burn is performed. For this

    asked by de wae on January 11, 2018
  3. Bio

    1. An isotope is an atom of an element that varies in mass number due to variation in the number of: A. atoms. B. protons. C. neutrons. D. electrons. is it C 2, A covalent bond is: A. the attraction that one atom has for another atom. B. the attraction

    asked by Amy on July 10, 2013
  4. Physics

    For a I got 36666.67 seconds which I don't know if its right and then b I know my answer is wrong because I got 0.0375 for wavelength.And I don't understand how to do e or f.   The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion

    asked by Kimia on May 10, 2017
  5. physics

    1. What did Newton conclude about the force that pulls apples to the ground and the force that holds the moon in orbit? 2. What does the very small value of the gravitational constant G (in standard units) tell us about the strength of gravitational

    asked by confused on July 13, 2010
  6. Physics

    A plane travels 1000 km at an angle of 40 degrees East to North, then changes direction and travels 500 km at an angle of 20 degrees North to East. What is the magnitude and direction of the planes total displacement?

    asked by Anonymous on April 27, 2016
  7. math

    A train leaves a station and travels north at a speed of 105 mph. Two hours​ later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they​ meet? please help

    asked by Madison on October 4, 2016
  8. Physics

    A plane travels 1000 km at an angle of 40 degrees East to North, then changes direction and travels 500 km at an angle of 20 degrees North to East. What is the magnitude and direction of the planes total displacement?

    asked by Ben on April 27, 2016
  9. Social Studies

    Which ones are true? a) Some people in northern Chad are nomadic and raise camels and plant crops in oases due to lack of arable soil. True b) In parts of West Africa they are careful not to cut down trees to make arable land. False c) c. Tension exists in

    asked by Marija Dacosta on November 17, 2015
  10. science

    The gravitational pull on Jupiter is 2.5 times greater than Earth's gravitational pull. If an object weighs 10 pounds on Earth, what will it weigh on Jupiter?

    asked by denzel on January 28, 2011
  11. Science

    A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit?

    asked by Boberto on November 30, 2016
  12. Physics

    The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the Earth (9.8m/s). What is the weight of an astronaut standing on the moon whose weight on Earth is 180lbs?

    asked by Ashley on March 8, 2012
  13. Physics

    What astronomical event would be seen by observers on the Moon at the time the Earth experiences a lunar eclipse? At the time the Earth experiences a solar eclipse?

    asked by Nikki on February 23, 2008
  14. Science

    The speed of light is 3 x 10 to the 8th power meters per second. If the sun is 1.5 x 10 to the 11th power meters from earth, how many seconds does it take light to reach the earth?

    asked by MG on December 15, 2014
  15. Science

    A new geosynchronous satellite needs an orbit of 35.7 km . The mass of the Earth is 5.97x 10^24 Kg and the radius of Earth 6.4 x 10^3 km. The mass of the satellite is 200 Kg. What velocity will it need to achieve that orbit

    asked by Boberto on November 30, 2016
  16. Algebra

    Your weigh on the moon is about 1/6 of your weigh on earth. Write and solve an equation to show how much a person weighs on earth if he weighs 16 lbs. on the moon .

    asked by Ella on February 4, 2016
  17. Physics

    a 4 kg object is taken to a planet that has 3 times the mass of earth and 1/2 the radius of earth. On this planet the mass of the object will be most nearly.. A. 12kg B. 3kg C. 48kg D. 4kg E. 24 kg

    asked by NATHAN on January 5, 2015
  18. Physics repost

    I apologise for reposting this question but it is still not working out for me. I know that: speed of light c=3.0x10^8 Time interval delta t=0.19x10^-9s The relationship between actual time and roudtrip distance is d=ct Also if there is and uncertainty of

    asked by Mary on October 17, 2007
  19. Physics

    a boat leaves shore and travels 30km east and then 15km 50 degree South of east Find the resultant the boats resultant displacement?

    asked by Earl on June 19, 2014
  20. physics

    A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s.

    asked by shug on October 1, 2010
  21. physics

    A rocket cruising past earth at 0.800c shoots a bullet out the back door,opposite the rocket's motion,at 0.900c relative to the rocket. What is the bullet's speed relative to the earth?

    asked by Ted on April 11, 2013
  22. English

    1. We will lead your children to the joys of reading. 2. We will lead your children to the joy of reading. 3. We will lead your children to joy of reading. (Which expressions are grammatical? Are both acceptable?) 4. I learn many things in class from her

    asked by rfvv on December 12, 2009
  23. Geography--Need this ASAP Please

    What countries could these be? I reallyy need help with this; it has to be done by tonight! 1. Country A= 'Shaped like an S, tropical rain forest, very populous, facing the South China Sea.' 2. Country B= 'A wet land bordered by mountains on west, north,

    asked by mysterychicken on November 21, 2009
  24. English

    Here's the homework assignment, which I don't understand how I'm suppose to do this. Check out the current National Health bill online and compose an outline. I can only find a republic of south Africa health hill and that one is 50 pages long.

    asked by John on September 8, 2009
  25. Physics

    An earth satellite moves in a circular orbit with an orbital speed of 5800 m/s. Find the time (expressed in seconds) of one revolution of the satellite. Find the radial acceleration of the satellite in its orbit. I think we need to know the radius of the

    asked by Josh on September 22, 2006
  26. math question

    Problem Find an approximate value for the rate at which the moon orbits the earth. Assume that the moon’s orbit is circular.

    asked by sherri on October 6, 2008
  27. Social sciences

    Find a straight line border in africa south of the equater name the equater name the countries that border separates

    asked by Nomphumelelo on February 3, 2013
  28. science-physics

    You walk 15 m south and 35 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically. What's the ° (counterclockwise from east)?? Well I tried using tan=15/35 the degrees ended up being 23 degrees which was

    asked by ashley on October 18, 2007
  29. PHYSICS

    How do I solve this? Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.6 kg and an initial velocity of nu Overscript

    asked by KS on April 26, 2015
  30. Earth physics I think

    Keplerian motion/Analemma Does the earth actually alter speed or is it a result of the earth being closer to the sun at some points in its eliptical orbit or BOTH? Additionally does anyone know where the value of the earth/sun analemma can be found. I read

    asked by MIKE on October 19, 2006
  31. physics

    A mass is suspended on a spring scale. The scale shows a reading of 5N and stretches a distance of 0.2 meters from its relaxed length. 1)What is the spring constant of the scale? )If this scale was taken to a planet that has a mass 4 times larger than the

    asked by matt on June 16, 2011
  32. Sci Plzz See This Post

    Does my poem below have these things "explain why it is where it is on the periodic table, what element(s) it might combine with to make a compound/molecule, and finally, WHY it would interact with that other element" Here is the Poem Below: “What’s

    asked by Anonymous on December 30, 2010
  33. Sci

    Does my poem below have these things "explain why it is where it is on the periodic table, what element(s) it might combine with to make a compound/molecule, and finally, WHY it would interact with that other element" Here is the Poem Below: “What’s

    asked by Anonymous on December 30, 2010
  34. Geography

    Where is the Gold Coast of NJ? Why? What was it? Where: Jersey City, New Jersey What: Urban area of North eastern NJ Why (Why was it called Golden Coast?): Hello again xD This was a GeoBee question that we had to look online for, I could find the "Where"

    asked by Hatsune Miku on February 6, 2017
  35. chemistry

    Select all true statements from the following: a. ) Metals are good conductors of heat and electricity. b. ) Nonmetals generally react by forming covalent bonds (i.e. sharing electrons) or by gaining electrons to form anions. c. ) Halogen atoms have the

    asked by Vishnu on October 5, 2008
  36. Data Mangement- Math

    Nancy lives in a subdivision where the streets are laid out in a grid pattern. Her school is six blocks south and four blocks east of her home. How many different direct routes could she take when she bicycles to school if she always stops by her

    asked by Maame on February 21, 2013
  37. physics

    A sailor in a small sailboat encounters shifting winds. She sails 2.00 km east, then 3.50 km southeast, and then an additional distance in an unknown direction. Her final position is 5.80 km directly east of the starting point. a) Find the magnitude of the

    asked by Star on September 24, 2008
  38. Math

    A train leaves a station and travels north at a speed of 45mph. Four hours later, a second train leaves on a parallel track and travels north at 105 mph. How far from the station will they meet? The trains will meet ________ miles away from the station

    asked by Pam on March 6, 2014
  39. Chem

    For germanium atom write: the set of four quantum numbers for the two highest energy electrons in an atom of Ge. If you go to www.webelements.com and click on Ge, then click on the electron configuration (on the left side of the site but you may need to

    asked by Ali on October 30, 2006
  40. calc

    15. Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. • • • • The intake facility is in the water 2 miles vertically north of the shoreline The water filtration plant is on land 1 mile vertically

    asked by Ryan on May 8, 2013
  41. calculus

    Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. -The intake facility is in the water 2 miles vertically north of the shoreline -The water filtration plant is on land 1 mile vertically south of the

    asked by James on May 8, 2013
  42. Math - Physics

    A typhoon moving 165 km/h 300 south of west is caused by two other forces acting in different directions. Find the components of the typhoon’s velocity that is due to the two forces.

    asked by Axel on July 16, 2017
  43. chemistry

    CH3CCH IN LEWIS DOT DIAGRAMS OK. Move the two top electrons on carbon 2 to carbon 3 and do the same for the two lower electrons on carbon 2. Move them to carbon 3. I'll see if I can do that but you see how difficult it really is.

    asked by zeina on December 4, 2006
  44. Science Physics

    An air plane flies 20 km in a direction 60 degree west of north then 40 km straight east and then 10 km in a direction 30 degree north of east . How far and at what direction is the plane from the starting point?

    asked by Kundan Subedi on November 23, 2016
  45. Force, Gravity, Resultant Force, Vectors

    Can someone just have a quick look over this question and my current answers and tell me if there are any massive mistakes im making. I feel confident with what ive done but just need a little boost. Question: An asteroid of mass m =7 .5×10^12 kg has two

    asked by Anon on October 29, 2017
  46. Phsyics

    The center of a 1.10km diameter spherical pocket of oil is 1.10km beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is . Express

    asked by Mikhail on April 15, 2010
  47. Science

    Why are the days typically hotter in June than in December here in the US? D. Because the United States faces the sun in the summer and faces away from the sun in the winter E.Because the tilt of the Earth causes the sun's rays to be more concentrated in

    asked by M on February 12, 2015
  48. Physics

    The center of a 1.10km diameter spherical pocket of oil is 1.10km beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is . Express

    asked by Adam on April 6, 2010
  49. science

    Hi...I am having trouble on one last science question. Which statement supports the fact that Earth rotates about its axis from West to East? a. only one face of the moon is visible from earth b. the moon's phases change every day over the course of 29

    asked by Brandi on February 8, 2013
  50. Science

    Have I matched the right Scientists with these famous sayings: Scientists: Ptolemy, Kepler, Copernicus, Newton, Galileo, Brahe & Hubble. 1)"I've finally worked out an explanation as to why planets orbit the sun and moons orbit planets. It is gravity that

    asked by Tyler on September 4, 2008
  51. 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?

    asked by SOMEBODY on September 13, 2018
  52. Science- Astronomy

    Suppose we find a planet in another solar system that has an earth like atmosphere with plentiful oxygen but no life of any kind. Question= Is this discovery considered reasonable or surprising can you please explain? Thank you

    asked by Junior on October 22, 2014
  53. Social Studies

    1. Which areas of South Asia are sparsely populated? A. coastal areas B. areas with an arid climate C. areas with heavy rainfall D. areas in the humid temperate climate region 2. Which religion has the most followers in South Asia? A. Sikhism B. Islam C.

    asked by Lexi on September 24, 2018
  54. physics

    Solar luminosity is estimated to have been 30% lower than today at the time when the solar system formed, 4.6 billion years ago. (a) If Earth's albedo was the same as it is now (A=0.3), what would have been its effective radiating temperature Te at that

    asked by Set6 on October 22, 2011
  55. physics

    The Sun and Earth each exert a gravitational force on the Moon. What is the ratio FSun/FEarth of these two forces? (The average Sun-Moon distance is equal to the Sun-Earth distance.)

    asked by johnny on December 6, 2008
  56. earth science

    The global ocean covers about 70% of the Earth’s surface. If all the ocean water was uniformly distributed over the whole surface, what would be its depth? Assume that the Earth is a perfect sphere, and the average ocean depth is 4 km.

    asked by Marisa on February 1, 2016
  57. physics

    A satellite is in orbit about Earth. Its orbital radius is 7.51×107 m. The mass of the satellite is 5415 kg and the mass of Earth is 5.974×1024 kg. Determine the orbital speed of the satellite in mi/s. 1 mi/s = 1609 m/s.

    asked by mac on February 26, 2011
  58. Physics

    What is the speed of the rocket when it is 350 above the surface of the earth? A rocket starts from rest and moves upward from the surface of the earth. For the first 10 of its motion, the vertical acceleration of the rocket is given by a(y)=2.9, where the

    asked by Andrew on September 9, 2012
  59. Social Studies (Please read this)

    Please just make sure that my information is right and it is grammatically correct. Thank you! In 1965, Congress adopted the Voting Rights Act. Describe this act. In our description, explain what led Congress to pass the act, and describe at least two of

    asked by Mame on June 4, 2016
  60. Physics

    An oil spill on the ocean is sometimes modeled as having a velocity that has two components: a wind induced velocity that is 3% of the true wind velocity and an independent tidal velocity Vtidal. The tidal velocity is 3.0 km/hr due north and V wind = 40

    asked by zaya on January 18, 2015
  61. history

    here's what i got for that question: question:compare the colonial empires of Spain, France and England in terms of their settlements, economic structure and political control. answer: The Spanish Empire was one of the largest empires in world history.

    asked by history on March 28, 2009
  62. chem

    why do more electrons increase dispersion forces?

    asked by Robin on November 28, 2008
  63. Science

    13.5g aluminium changes to Al^3+ in solution by loosing ..... electrons.

    asked by Chemistry question on January 4, 2016
  64. science

    how many electrons are trasfered if a liquid has a on 7,5×10-19C

    asked by Anonymous on May 9, 2016
  65. Chemistry

    If an element has 12 protons and 17 neutrons, how many electrons must it have?

    asked by Ciaria on March 4, 2015
  66. science

    are valence electrons affected by isotopes

    asked by lizzy on September 5, 2018
  67. chemistry

    how many protons and electrons are in 7.4 grams of hydrogen?

    asked by joe on April 13, 2016
  68. CHEM

    What is the number of "UNBOUND" electrons in H2O...its not 0 or 2....is it 1??

    asked by CHEMISTRY on May 1, 2011
  69. physics

    flow of electrons in a conductor is called what?

    asked by sue on September 2, 2011
  70. science/chem

    Why do the d and f block elements have only 2 valence electrons?

    asked by missy on February 22, 2011
  71. chem(redox)

    Why are nonmetal reduced when they gain electrons?

    asked by Lou on April 22, 2009
  72. Chemistry

    How many electrons and orbitals are represented by 2s2

    asked by Joey on March 14, 2012
  73. General chem

    How many electrons can have the quantum numbers n=4; l=2; ml=2 in an atom?

    asked by Monika on April 17, 2013
  74. maruco

    The electrons in the d–orbitals – are they from the metal or the ligands.why?

    asked by emmanuel on December 26, 2016
  75. physics

    Describe the operation of electrons in a conductor

    asked by Esther on April 29, 2012
  76. Chemistry

    How many electrons are present in 0.002 moles of O--?

    asked by Abhinav on June 3, 2016
  77. Science Help

    which element belongs to this group, although it has only two electrons?

    asked by John Doswell on December 9, 2015
  78. chemistry

    I need to identify two terms that can be applied to electrons

    asked by Victoria on February 12, 2015
  79. Chemistry

    Among the following electrons, which has highest energy? a. n = 3, l = 2, m = 0, s = + 1/2 b. n = 4, l = 0. m= 0 , s = - 1/2 Ans is A... but how A? Why nOt B?

    asked by Nabsha on October 9, 2016
  80. Science

    How many electrons in the first free levels of silicon

    asked by Dakota on December 7, 2011
  81. 12th grade chemistry

    The number of electrons in an atom of Iron-56 is

    asked by san col on September 15, 2010
  82. Chemistry

    How many valence electrons are in ClO2. I think its 17...is it correct? Thanks.

    asked by Anonymous on November 15, 2007
  83. Ions and octet rule

    Element Z3+ contains 31 protons. What is the identity, and how many electrons does Z3+ have.

    asked by Anonymous on October 17, 2014
  84. physical sciences

    Why do He and Ne then have different numbers of electrons in their outer shells? . . Help Please..

    asked by lalt on May 25, 2012
  85. ATOM ANDELECTRONS

    HOW MANY ELECTRONS SHELL DOES A LITHIUM ATOM HAVE

    asked by YASY on February 19, 2009
  86. Science

    How many valence electrons does an atom of rubidium have?

    asked by Anonymous on February 25, 2016
  87. science

    if cerium has 1.12 electrons than how many neutron and protons does it have

    asked by Anonymous on October 28, 2010
  88. Chemistry

    Which of the following is most likely to LOSE electrons when forming an ion? a. F b. P c. S d. Rh e. Se

    asked by Jenny on November 2, 2009
  89. Science Help!

    How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two Is the answer D?

    asked by Callie on November 12, 2014
  90. chemistry

    when Zn0 becames Zn++, where do the 2 electrons that are lost come from?

    asked by jack on November 9, 2012
  91. science

    If oxygen have 8 protons and 5 electrons is it stable

    asked by Anonymous on May 4, 2016
  92. Chemistry

    How many electrons and how many protons are in the ion Cr6+?

    asked by Jenna on February 19, 2010
  93. Chemistry

    What happens to the valence electrons in metallic bonds?

    asked by Anonymous on January 24, 2012
  94. Chemistry

    How many valence electrons are in carbon tetrachloride?

    asked by Sydney on July 15, 2009
  95. chemestry

    what is the charge on an ion with 25 protons and 29 electrons?

    asked by Anonymous on November 29, 2012
  96. Science

    How do you determine protons, neutrons, electrons?

    asked by Adrian on March 12, 2008
  97. physiscs

    what is emitted by the vibrating electrons of attoms

    asked by lizeth calderon on March 26, 2014
  98. Pysics

    Planet X has the same mass as earth, but its radius is only half as big. How does the gravity on this planet compare with the gravity on our planet earth?

    asked by Stephanie on March 18, 2012
  99. physics

    Planet X has the same mass as earth, but its radius is only half as big. How does the gravity on this planet compare with the gravity on our planet earth?

    asked by Stephanie on March 18, 2012
  100. math

    THE DISTANCE FROM EARTH TO MOON IS ABOUT 22^4 MILES . THE DISTANCE FROM EARTH TO NEPTUNE IS ABOUT 22^7 MILES . WHICH DISTANCE IS GREATER ? ABOUT HOW MANY TIMES GREAT ?

    asked by mota on March 1, 2008