1. Physics

    Assume that Earth’s magnetic field is every- where perpendicular to the path of a proton and that Earth’s magnetic field has an inten- sity of 4.10 × 10−8 T. What speed would a proton need to achieve in order to circle Earth 1170.0 km above the
  2. social studies

    while in sandiego the pittsgurgh could travel just a little south to visit the famous peninsula of what in the country of mexico? Anonymous... check your local Atlas... what peninsula is directly south of San Diego, California.
  3. Social Studies

    Why was the migration of the Aryans to India significant? What do many of the political conflicts in South Asia have in common? Why is the population of South Asia a concern for the region? Please just give me websites beside Wikipedia because I don't
  4. Astronomy

    Imagine that Earth did not turn on its axis. (a) What would be true about the ecliptic? It would now define the day rather than the year. It would still be defined and could be seen from all points on Earth, but only when they faced the sun. It would still
  5. physical science,

    the planet jupiter is more than 300 times more massive than earth. However,an object scarcley weighs 3 times as much on the surface of jupiter as it does on the surface of the earth. how can that be? Determine the radius of jupiter in terms of earth radii
  6. physics

    You spot a plane that is 1.63 km north, 2.3 km east, and at an altitude 5.2 km above your position. 1) At what angle from due north (in the horizontal plane) are you looking? ( ) °E of N 2) Determine the plane's position vector (from your location) in
  7. Physics

    A motorist drives north for 40.0 minutes at 61.5 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.70 h. (a) What is his total displacement? (b) What is his average velocity?
  8. physics

    an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?
  9. physical

    an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?
  10. Physics

    A motorist drives north for 33.0 minutes at 77.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.80 h. a) What is his total displacement in km? b) What is his average velocity km/h?
  11. biomechanics

    an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?
  12. Physics

    A motorist drives north for 30.0 minutes at 62.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.90 h. (a) What is his total displacement? (b) What is his average velocity?
  13. physics

    A motorist drives north for 40.0 min at 90.0 km/h and then stops for 15.0 min. He then continues north, traveling 130 km in 2.00 h. (a) What is his total displacement?(b) What is his average velocity?
  14. biomechanics

    an orienteer runs 300m north and then 400m to the southeast (at a 45 degree angle to north). if he runs at a constant speed, how far away is he from the starting position?
  15. Physics

    Suppose that a steel hoop could be constructed to fit just around the earth's equator at a temperature of 20.0 Celsius. What would be the thickness of space between the hoop and the earth if the temperature of the hoop were increased by 0.200 C? Use
  16. Physics repost please clarify

    The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what
  17. OCEANOGRAPHY HELP

    What ridge is located at 10 degrees South and 90 degrees East? I thought it was the Cocos Ridge but am wrong. Thanks. It is called the Ninetyeast Ridge, and it is in the Indian Ocean. There is a Cocos Ridge off the coast of Panama in the North pacific,
  18. physics

    A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Next, it flies for 150 km 20.0° west of north to city B. Finally, the plane
  19. Physics

    An airplane whose air speed is 620km/h is supposed to fly in a straight path 35 degrees north of east. A steady 95km/h wind is blowing from the north. In what direction (angle) should the plane head?
  20. Physics

    You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^-19 C, m=
  21. physics

    a ferry is crossing a river. If the ferry is headed due north with a speed of 2.5 meters per second relative to the water and the river's velocity is 3 meters per second to the east, what will the boat's velocity be relative to earth?
  22. geography

    I am confused. I am to list my full address and say what continent, hemispheres and planet is my address in!! New Orleans, La. Continent - North America. Hemisphere - Northern Hemisphere. Is this correct? Planet - Earth. Is this correct????
  23. caculus (pipeline)

    A common problem encountered by the oil industry is to determine the most cost-effective route to connect various wells in an oil fertile area. The attached map is a copy of a section of a U.S. Geographical Survey contour map with a wetland area outlined.
  24. Navigation

    A fisherman leaves his home port and heads in the direction N 70 degree W. He travels 30 mi and reaches Egg Island. The next day he sails N 10 degree E for 50 mi, reaching Forrest Island. a) Find the distance between the fisherman's home port and Forrest
  25. Physics

    an automobile travels 3 miles due north then 5 miles north of east. what is your resultant displacement?
  26. History

    Struggle for north america - what was thr climax of british- frenvh rivalry in north america?
  27. physics

    Two spherical objects are separated by a distance of 1.41 × 10^-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons.
  28. physics

    Two spherical objects are separated by a distance of 1.53 × 10-3 m. The objects are initially electrically neutral and are very small compared to the distance between them. Each object acquires the same negative charge due to the addition of electrons. As
  29. English

    Do you capitalize north as in "The North?"
  30. Trigonometry

    The Earth rotates on it's axis once every 24 hours. a)How long does it take Earth to rotate through an angle of 4pi/3? b)How long does it take Earth to rotate through an angle of 210 degrees?
  31. third side (picture attached)

    I have already asked this in another thread. Here is more explanation: The radius of earth's orbit is 1.5 * 10^8km & the radius of venus's orbit is 1.1 * 10^8 km. We need to find out the distance from earth to venus for both positions of venus. A picture
  32. physics

    A Coast Guard cutter detects an unidentified ship at a distance of 16.7 km in the direction 13.8° east of north. The ship is traveling at 24.9 km/h on a course at 39.2° east of north. The Coast Guard wishes to send a speedboat to intercept the vessel and
  33. physics

    A Coast Guard cutter detects an unidentified ship at a distance of 16.7 km in the direction 13.8° east of north. The ship is traveling at 24.9 km/h on a course at 39.2° east of north. The Coast Guard wishes to send a speedboat to intercept the vessel and
  34. Physics

    Calculate the distance, in m, of the centre of mass of the Earth-Moon system from the centre of the Earth. Note: the mass of the Moon is 7.35x10 22kg, the mass of the Earth is 5.98x10 24kg, and their separation is 3.85x10 8m.
  35. Physics

    Consider the earth following its nearly circular orbit about the sun. The earth has mass 5.98*10^24 and the sun has mass 1.99*10^30. They are separated, center to center, by r=150 million k. What is the size of the gravitational force acting on the earth
  36. Physics

    Suppose a new extrasolar planet is discovered. Its mass is double the mass of the Earth, but it has the same density and spherical shape as the Earth. How would the weight of an object at the new planet's surface differ from its weight on Earth? (Let Wnew
  37. PHYSICS HELP PLEASE!

    The maximum wavelength of light emitted from a blackbody that will emit electrons from a given piece of metal is 255nm. What is the fraction of total energy emitted from the black body that emits electrons? I set up the integral:
  38. physics problem ???

    A projectile is ejected from a 25-m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth?? (Assume gravity of mars=
  39. science science science science science science

    The moon orbits around the earth.Which of the following keeps the moon traveling in the same path each time it orbits the earth? A.energ from the surroundings B.Pull of gravity between the moon and the earth C.orbits in space are pushing the moon towards
  40. inscribed angles

    A satellite, B is 17,000 miles from the horizon of Earth, Earth's radius is about 4,000 miles. Find the approximate distance the satellite is from the Earths surface. possilbe answers 13,464 17,464 20,957 21,000 I do not understand how to do these problems
  41. science

    the question says assume the valencies of hydrogen, nitrogen and carbon in the compounds are 1, 3 and 4 from this i must draw a structural formulae for hydrogen cyanide and cyanogen that are consistant with these valencies. please help H : C::: N: Does
  42. Physics

    A flight controller determines that an airplane is 34.0mi south of him. Half an hour later, the same plane is 42.0mi northwest of him. The general direction of the airplane’s velocity is? If the plane is flying with constant velocity, what is the
  43. HIS/115

    Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?
  44. History

    Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?
  45. HIS/115

    Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?
  46. Physics

    Dina walked North and East and has a resultant displacement of 125, 35^0 East of North. She has a velocity of 2.5 m/s. Compute her walking time and average speed.
  47. Vectors

    A boat heads 15 degrees west of north with a water speed of 3 m/s. Determine its velocity relative to the ground when there is a 2 m/s current from 40 degrees east of north.
  48. physics

    Can someone help me out with this question: A motorist drives north for 41.0 minutes at 80.5 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.70 h (a) What is his total displacement? (b) What is his average velocity?
  49. North America Climate

    Which of the following does not influence the distribution of climates in North America? a. tropical latitude location b. ocean currents c. high mountain ranges C.??
  50. College Physics

    Find the magnitude of the magnetic flux through the floor of a house that measures 21m by 13m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10−5 T pointing north, and a downward vertical
  51. physics

    A 66.0 kg man is ice-skating due north with a velocity of 5.70 m/s when he collides with a 36.0 kg child. The man and child stay together hand have a velocity of 2.20 m/s at an angle of 33.0° north of east immediately after the collision. What was the
  52. physics

    An airplane has a velocity of 400 km/h relative to the wind. At the same time, a wind blows northward with a speed of 75 km/h relative to earth. Find the direction that the airplane must head in order to move in an easterly direction relative to earth.
  53. PHYSICS

    JOHN WANTS TO PADDLE HIS CANOE ACROSS A RIVER THAT IS 200M WIDE, HE STARTS FROM THE EAST SIDE. THE WATER CURRENT FLOWS NORTH-SOUTH AT 0.5MS^-1. IT TAKES JOHN 252S TO CROSS THE RIVER. 1. DRAW A DIAGRAM TO GRAPHICALLY REPRESENT THE VELOCTY VECTORS OF THE
  54. PHYSICS

    A person walks 11.2 ◦ north of east for 4.06 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? Answer in units of km
  55. Physics

    2. A person is walking in downtown Chicago. He starts 7 blocks north and 3 blocks west of the city’s center. He then walks to a position of 12 blocks north and 1 block east of the city’s center. What was his displacement magnitude and direction?
  56. physics--please help

    Only need help with part c--answer for part a is 2.94 radians and for b it is 777 days Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days.
  57. Physics

    When astronomers find a redshifted celestial object, they say that the object is moving away from Earth. Can the redshift be interpreted as the Earth moving away from the celestial object?
  58. Physics

    A rock is falling towards the Earth. Suppose the action force is the pull of the Earth on the rock. What is the reaction force? I do not know how to find the reaction force.
  59. 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
  60. Physics

    A 90 kg person stands on the ground before jumping vertically upward. If momentum is truly conserved in all closed isolated systems, then the Earth-person system should conserve momentum. If the person jumps with a speed of 3.5 m/s, what is resulting speed
  61. Physics

    "You can jump 2 feet vertically on Earth. Figure out how high you would be able to jump on the Moon, where acceleration due to gravity is ⅙ that of Earth. Assume you launch upwards with the same speed on the Moon as you do on the Earth." I've already
  62. Physics

    Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm. What is
  63. Science

    You can jump 2 feet vertically on Earth. Figure out how high you would be able to jump on the Moon, where acceleration due to gravity is ⅙ that of Earth. Assume you launch upwards with the same speed on the Moon as you do on the Earth." I've already
  64. Physics

    A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth.The traces of the rain on the windows of the car make an angle of 60 degrees with the vertical. Find the velocity of the rain
  65. MATH (CALCULUS) PLZ HELP

    A common problem encountered by the oil industry is to determine the most cost-effective route to connect various wells in an oil fertile area. The attached map is a copy of a section of a U.S. Geographical Survey contour map with a wetland area outlined.
  66. physics

    A 2,200-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 35.0° north of east and at a speed of 5.16 m/s. Find the speed of the 3,000-kg car before the
  67. Physics 1

    Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon. WEarth/WEarth's Moon=
  68. Physics 1

    Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon. WEarth/WEarth's Moon=
  69. Physics

    A car with a mass of 1700 kg is traveling directly northeast (45 degrees between north and east) at a speed of 14m/s (31mph), and collides with a smaller car with a mass of 1300kg that is traveling directly south at a speed of 18m/s (40mph). The two cars
  70. physics

    A plane leaves Seattle, flies 85 mi at 22 degrees north of east, and then changes direction to 48 degrees south of east. After flying 115 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches
  71. Physics

    a car travels 59.78 miles east in 89.67 minutes, then 89.67 miles north in 59.78 minutes, and then 29.89 miles at 59.78 degrees west of south in 149.45 minutes. whats the magnitude of the car's average velocity in miles per hour??? Please help!!!!!! P.S.
  72. world issues

    A woman goes out running. She first travels 5.2km north. She then turns and travels 3.6km west. Finally, she turns If a bird were to start out from the origin (where the woman starts) and fly directly (in a straight line) to her final location, what
  73. Psychology-JetLag

    After staying awake late many nights, Glorida has become accustomed to going to sleep late and awakening late. Now she tries to shift going to bed earlier and waking up earlier. This shift is similar to difficulties people face when they travel a. north b.
  74. Maths

    a ship A is 5 nautical miles due north of ship B. Ship A is steaming due west of at 15 knots and B is steaming due north west at 10 knots. Find the distance and the time of their nearest approach to each other
  75. Biology

    Carbon is a an element with an atomic number of 6. Based on this information, which of the following statements is true? A. Carbon can be broken down into simpler component substances. B. Each carbon atom will always have 6 protons. C. Each carbon atom
  76. English

    1. The south exit is close to the bus stop. 2. The south exit is close by the bus stop. 3. The south exit is near by the bus stop. 4. The south exit is nearby the bus stop. 5. The south exit is next to the bus stop. ========================= Which ones are
  77. Astronomy

    The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for
  78. physics

    The weight of an object on earth is 20 newton if the object put 6400km above from the earth so what was the weight of the object if the radius of earth is 6400 km
  79. math

    Greg is at his house.He gets in his car and drives north 9.6 miles and stops at the store.Then he turns around and drives south 8.4 miles to go to his friend's house.How far is the friend's house from Greg's house?
  80. physics

    Somewhere between the Earth and the Moon, the gravitational pull exerted by these two bodies on a space pod would cancel. Is this location nearer the Earth or nearer the Moon? A) Nearer the Earth. B) Nearer the Moon. C) At the half-way point.
  81. 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.
  82. South Park

    What websit can i go to to watch full episodes of south park?
  83. South America

    How has geoghrgphy shaped the way people live in south america
  84. Astronomy

    "If the Sun were magically replaced with a giant rock that had precisely the same mass, Earth’s orbit would not change. Explain why not." I'm a little confused as to how to answer this. Is it because Earth doesn't orbit the exact center of the sun.
  85. math

    35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected. Find the probability that: a. Exactly 3 people will agree with that position (taken by the 35% of
  86. ap physics

    A golfer sees the green (where the hole is) at a distance of 120.0 m at heading 75.0° north of west. She also sees her teammate at a distance of 60.0 m and heading 15.0° north of east. What distance and direction would her teammate have to land the ball
  87. math

    35% of North Americans do not think that college education is a contributory factor to economic success. A random sample of seven North Americans is selected. Find the probability that: a. Exactly 3 people will agree with that position (taken by the 35% of
  88. Physics

    At New York City, the earth's magnetic field has a vertical component of that points downward (perpendicular to the ground) and a horizontal component of that points toward geographic north (parallel to the ground). What are the magnitude and direction of
  89. physics

    Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume
  90. physics

    Two stars are 3.80 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.19 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that
  91. physics

    Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that
  92. Physics Using hydrostatic equilbrium)

    3. A model of Earth’s interior: Look up the radius and mass of the Earth. Radius is 6,371 km Mass is 5.974 x 10^24 kg Calculate its average density. p_e = (5.974 x 10^24 kg)/ (4/3)pi r^3 = (5.974 x 10^24 kg)/ (4/3)pi (6371)^3 = 5.54 g/cm^3 Using this
  93. Physics, fluid mechanics

    The temperature of earth atmosphere drops 5°C for every 1km elevation above the earth surface. If the air temperature at ground level is 15°C and 760 mmHg, determine the elevation in m when the pressure is 380 mmHg. Assume the air is an ideal gas with
  94. 8th grade science

    Q: A person living in North America will be able to see 15 lunar eclipses in the 2010-2020 decade. In the same time period, only two solar eclipses can be observed in North America. why will more lunar eclipses than solar eclipses be visible from North
  95. chemistry

    Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a
  96. Chemistry

    Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a
  97. Physics-PLEASE HELP ASAP

    A tungsten target is struck by electrons that have been accelerated from rest through a 38.9-kV potential difference. Find the shortest wavelength of the radiation emitted.
  98. Physics

    A jogger travels a route that has two parts. The first is a displacement of 2.90 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.25 km. (a) What is the magnitude of , and what is
  99. Physics

    A jogger travels a route that has two parts. The first is a displacement of 2.20 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 4.10 km. (a) What is the magnitude of , and what is
  100. physics

    A jogger travels a route that has two parts. The first is a displacement of 2.15 km due south, and the second involves a displacement that points due east. The resultant displacement + has a magnitude of 3.95 km. (a) What is the magnitude of , and what is