Two electrons are placed; one at north pole and other at south pole of earth. Find the force between them. Given diameter of earth= 12800 km.

227,364 results, page 10

  1. Physics

    "If a small planet were located 8 times as far as the Earth's distance from the Sun, what would be its period in Earth years?" (22.5 earth years) As a note, we are given a table with all of the planets' masses and radii.
  2. principles of physics

    Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).
  3. physics

    how many excess electrons must be placed on each of two small metal spheres placed 3.00 cm apart in a vacuum if the force of repulsion betwen the spheres is to be 0.000000008 N? how do i solve this problem??=( help please.thx. Use Coulomb's Law: F = k Q^2/R^2 The force is F = ...
  4. physics

    1. Two similar cylindrical polished bars weighing 5.00 N each lie next to one another in contact. A third similar bar is placed on the other two in the groove between them. Neglecting friction what horizontal force on each other is necessary to keep them together? 2. Many ...
  5. Algebra ii

    A certain town is at a latitude of 35.2 degrees N. Find the distance in miles from the town to the north pole.
  6. science

    Couple of questions. Why does the earth keep moving? The engine of a rocket applies a continual force to push the rocket along. When the engine stops what will happen? I think the rocket will stop acceleration You need to be aware of the concept of inertia. Inertia is the ...
  7. Math

    The gravitational acceleration, g, on the Earth is proportional to the mass, M, of the Earth and inversely proportional to the square of the distance, r, from the Earth's center. If the gravitational acceleration on the center of the Earth is 9.8 m/s^2, what is the ...
  8. physics- please help me!

    Earth turns on its axis approximately once every 24 hours. The radius of Earth is 6.38 X 10^6 m. a.) If some astronomical catastrophe suddenly brought Earth to a screeching halt (a physical impossibility as far as we know), with what speed would Earth's inhabitants who live at...
  9. maths

    Two places on the same meridian have latitudes 10 degree south and 53 degree north. What is their distance apart measured along the meridian?(radius of the earth R=6400km,pi=22/7)
  10. Science

    Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?
  11. Algebra/Trig Check Answers please

    Please check these answers thanks. 1. The shadow of a vertical pole is 24.8 feet long when the angle of elevation of the sun is 42degrees 0.0'. Find the height of the pole. Answer: 22.3=height 2. From a point on a lighthouse 108 feet above water, the angle of depression of a ...
  12. Physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg ...
  13. physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg ...
  14. earth science

    how can the interactions between the earth systems affect the climate?? any one help me i don't knw where to start and i need to write 700 words on it Step one is to read your S103 course materials rather than try to get someone else to answer it for you.
  15. physics

    Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).
  16. trig

    earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
  17. Physics

    The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at the equator. My ...
  18. geography

    Can you check my answers please? 1. What Russian peninsula is located between the Bering Sea and the Sea of Okhotsk? Kamchatka Peninsula 2. How many degrees of longitude circle the Earth? 360 degrees of longitude 3. What continents are included in the "tropics"? Australia, ...
  19. social studies

    Which country arrived at the South Pole, the center of Antarctica?
  20. geography

    Which continents includes the South Pole? Just Antarctica right?
  21. physics

    A horizontal ,straight wire carying 12.0A current from west to east is in the earth's magnetic field B.At this place,B is parallel to the surface of the earth ,points to the north and its magnitude is 0.04mT.Determine the magnetic force on 1m length of the wire.If mass of this...
  22. physics

    The moon is receding from the Earth by approximately 3.8 cm per year. Earth's mass is 5.98 x 10^24 kg, and its radius is 6.38 x 10^6 m. The Moon's mass is 7.3 x 10^22 kg, its radius is 1.79 x 10^6 m, and its orbital period around Earth is 27.3 days. The current average ...
  23. Physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg ...
  24. physics

    Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg ...
  25. MATH

    There is a flag pole that is 12ft tall its shadow is 18 ft long there is a man that is 6 ft standing next to the pole how long is his shadow? How would i figure this out
  26. Pre Algebra

    a wire is stretched from the top of a 26-foot pole to a point on the ground that is 15 feet from the bottom of the pole. Approximately how long is the wire in feet? 16 21 30 37
  27. Math

    In a circus a tightrope is stretched from the top of a 10 ft. pole to the top of a 25 ft pole. The poles are 36 feet apart and vertical. How long is the tightrope? Show your work.
  28. Trigonometry

    how long is the cable that supports a 10m. high antenna if the cable is connected at the middle of the pole of the antenna and at the ground 6m. away from the base of the pole?
  29. physics

    I have these problems that I keep doing and keep missing. If someone could please help me with what I am doing wrong! Two charges, -25 µC and +15 µC, are fixed in place and separated by 3.4 m. (a) At what spot along a line through the charges is the net electric field zero? ...
  30. georaphy

    Can you help? Is the Arctic Circle north or south of the Tropic of Capricorn? My Mom says it can be north or south of the Tropic of Capricorn because the earth is round. My answer is the Arctic Circle is north of the Tropic of Capricorn. WHO is RIGHT, Me or my Mom?
  31. Physics

    Two fire alarms are placed in a building, one 2.3 m north of the other. A person sitting at a desk which is 67.2 m east and 8.4 m north of the point mid-way between the alarms does not hear them when they sound. What is the lowest frequency that the alarms can be sounding at ...
  32. math

    A 26 meter guy wire is attached to an upright pole 24 meters from the ground. How far from the pole must the wire be anchored in the ground?
  33. physics

    Two pellets, each with a charge of 1.0 microcoulomb (1.0×10−6 ), are located 4.0 (4.0×10−2 ) apart.A)find the electric force between them B)What would be the mass of an object that would experience this same force in Earth's gravitational field?
  34. Physics

    A rocket has put your spacecraft in a circular orbit around Earth at an altitude of 350 km. Calculate the force due to gravitational between the Earth and the spacecraft in N if the mass of the spacecraft is 2450 kg.
  35. science

    uniform magnetic field is from west to east,electrons enter from north to south,so what is the direction of force acting on electron?
  36. MATH (7th Grade)

    Laura is standing 9ft away from a light pole. her shadow is 6ft long. If Laura is 5ft tall, which is closest to the height of the light pole 14.8???
  37. Astronomy

    1.If you mande a model of the solar system with the Earth. The size of a tennis ball [about 6.5c.m in diameter] How big would your model of the sun be? 2.How far away from the tennis ball Earth would your model Sum be.If you kept the size and distance to scale? Since the Sun's...
  38. math

    A ladder rests against a vertical pole. The foot of the ladder is sliding away from the pole along horizontal ground. Find the inclination of the ladder to the horizontal at the instant when the top of the ladder is moving 3 times as fast as the foot of the ladder.
  39. math

    A ladder rests against a vertical pole. The foot of the ladder is sliding away from the pole along horizontal ground. Find the inclination of the ladder to the horizontal at the instant when the top of the ladder is moving 3 times as fast as the foot of the ladder.
  40. Physics

    A monkey is chained to a stake in the ground. The stake is 2.81 m from a vertical pole, and the chain is 3.61 m long. How high can the monkey climb up the pole?
  41. Physics Help!

    A monkey is chained to a stake in the ground. The stake is 2.78 m from a vertical pole, and the chain is 3.48 m long. How high can the monkey climb up the pole?
  42. math

    Laura is standing 9 ft away from a light pole, Her shadow is 6 ft long. If Laura is 5 ft tall, which is closest to the height of the light pole?
  43. physics

    Using Newton's Law of Universal Gravitation, compare the weight of a 68.1 kg astronaut on the surface of the earth to the gravitational pull of the Earth on the same astronaut when she is on the International Space Station. Constants: Average altitude of the ISS above the ...
  44. physics

    Using Newton's Law of Universal Gravitation, compare the weight of a 68.1 kg astronaut on the surface of the earth to the gravitational pull of the Earth on the same astronaut when she is on the International Space Station. Constants: Average altitude of the ISS above the ...
  45. precalculus

    can you please explain how to find the distance between the pole and directrix?
  46. physics

    A treasure map you uncovered while vacationing on the Spanish Coast reads as follows: "If me treasure ye wants, me hoard ye'll have, just follow thee directions these. Step to the south from Brisbain's Mouth, 6 paces through the trees. Then to the west, 10 paces ye'll quest, ...
  47. Physics

    How to find the centripetal acceleration of an object that is at a latitude of 52 degree to the equator given the radius of earth=6400km and angular vel of Earth about its axis=7.3 x 10^-5 rad/s ?
  48. Physics (please help!!)

    The moon causes tides because the gravitational force it exerts differs between the side of the Earth nearest the Moon and that farthest from the Moon. Find the difference in the accelerations toward the Moon of objects on the nearest and farthest sides of the Earth.
  49. English check

    1.)Supported the ideas of plainness, divine mission, and grace =a.)The North--Puritanism b.)The South---Gentlemen Planters c.)Both 2.Came to America to find freedom to worship and the Promised Land =a.)The North--Puritanism b.)The South---Gentlemen Planters c.)Both 3.Believed ...
  50. Science

    Esplain how the north pole of the bar magnet got its name?
  51. Geography

    Is this correct? Madison Wisconsin is closer to the equator than the North Pole?
  52. ochem

    A 74 kg man weighs himself at the north pole and at the equator.By how much?
  53. math

    The mean radius of the Earth is 6.37 x 106 meters (m). Assuming the earth can be modeled as a perfect sphere a. In cubic meters (m3 ) what is the volume of the Earth? b. In meters (m) what is Earth’s circumference? c. If the mean density is 5.515g/cm3, what is the Earth’s ...
  54. Physical Science

    My homework is to do some exercises on the Foucault Pendulum. I'm stuck on several of the problems. One is to find the approximate angle of rotation of the earth in one day at our latititue, which is 39.9. I found the equation n = 360 sin of latitude, but I have no idea how to...
  55. physics

    Calculate the acceleration due to gravity on the moon. The moon\'s radius is about 1.74 E 6 m and its mass is 7.35 E 22 kg ok aparently there\'s an easier way to do this I applied Newtons second law in the radial direction net force radial = m (radial acceleration) = Fg were ...
  56. Physics

    Two spherical objects with a mass of 7.60 kg each are placed at a distance of 2.93 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
  57. Physics

    Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
  58. physics

    show that the weight of an object on moon is one-sixth of its weight on the earth given mass of earth=5.98*10power24kg, radius of earth=6.37*10power6m. given mass of moon=7.36*10power22kg, radius of moon=1.74*10power6m.
  59. Physics

    The Earth is about 81 times more massive than the moon. During the gravitational interation of the Earth and the Moon, the magnitude of the gravitational force acting on the Earth _______ the gravitational force acting on the Moon. A) is greater than B) is less than C) is the ...
  60. problem solving

    Given that • The distance from the earth to the sun is 1.5*10^11m, and • The mass of the sun is 1.9 *10^30 kg , 1. use Kepler’s Law of Periods to find the period of the earth’s orbit, recorded in seconds:; 2. show how to express your answer in years; and 3. if your ...
  61. physics

    NASA launches a satellite into orbit at a height above the surface of the Earth equal to the Earth's mean radius. The mass of the satellite is 550 kg. (Assume the Earth's mass is 5.97 1024 kg and its radius is 6.38 106 m.) (a) How long does it take the satellite to go around ...
  62. physics

    if the rolling ball represents the running vaulter and the ruler represents the pole in the model, how does the amount of bend in the pole depend on the vaulters running speed? record your data and response in your log.
  63. math

    A flag pole sits on the front lawn of a school, 6.6 m from the front door. The angle of elevation from the base of the school to the top of the pole is 38°. Determine the height of the flagpole, to the nearest tenth of a metre.
  64. history/science

    hi. i would like to know if someone can send me websites other than wikipedia that might be able to help me find out stories of how the earth and the things on earth were made...
  65. algebra

    dan has 6 worms on each pole and gary has 11 worms on each pole there are total of 13 poles and 103 how many poles does each guy have
  66. algebra 2

    Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.
  67. algebra 2

    Guy wire. How long is a guy wire reaching from the top of a 24ft pole to a point on the ground 16 ft from the pole? Thank you.
  68. algebra 2

    Guy wire. How long is a guy wire reaching from the top of a 21ft pole to a point on the ground 14 ft from the pole? Thank you.
  69. physics

    A distance of 1 m separates two objects, one with a mass of 2 kg and the other with a mass of 4 kg. A 0.5 kg mass is placed between them at the point where the net gravitational force generated by the other two masses is zero. How far is the 0.5 kg object from the 2 kg object?
  70. science

    Somewhere between Earth and the Moon, gravity from these two bodies on a space pod would canel. Is it closer to the Earth or the Moon? why?
  71. Math

    A flag pole and a building stand on the same horizontal level from a point P at the bottom of the building the angle of elevation of the top T of the flag pole is 68 degree.From the top Q of the building the angle of elevation of the point T is 28 degree.If the building is 20m...
  72. physics

    calculate the force of gravity between earth (mass = 6.0 x 1024kg) and the moon (mass = 7.4 x 1022 kg). the average Earth-moon distance is 3.8 x 108 m.
  73. physics

    Calculate the force of gravity between Earth (mass = 6.0 * 1024 kg ) and the moon (mass = 7.4 * 1022 kg) the average earth-moon distance is 3.8 * x10^8 m
  74. logic

    Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
  75. math

    Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
  76. Algebra

    Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
  77. Algebra

    Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
  78. Algebra

    Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...
  79. physics

    A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.
  80. Physics

    The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass...
  81. Physics

    1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.
  82. physics

    the earth and moon has same type of and equal magnitude of charges to balance the gravitational force between earth and moon the required magnitude of charge will be
  83. PHYSICS

    Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s curvature “drops” 5 m for each 8-km tangent. Discuss how these two facts relate to the 8-km/s speed necessary to orbit Earth.
  84. Agarwal Siksha samithi

    A Vertical pole of 5.6m height carts a shadow 3.2m long at same time find the height of pole which carts a shadow 5m long.
  85. PSY 102

    Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s curvature “drops” 5 m for each 8-km tangent. Discuss how these two facts relate to the 8-km/s speed necessary to orbit Earth.
  86. physics

    somewhere between earth and the moon gravity from these two bodies on a space pod would cancel. Is this location nearer to earth or the moon?
  87. Physics

    Consider a space pod somewhere between earth and the moon, at just the right distance so that the gravitational attractions to Earth and Moon are equal. Is this location nearer Earth or Moon?
  88. Physics

    Find the net force of gravity on the moon (Mm = 7.35 x 10^22 kg) from the earth and the sun (Ms = 1.99 x 10^30). Assume that the two forces are perpendicular to each other. Give the angle in relationship to the sun.
  89. physics

    A 581 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. the orbital speed is 5590.98 m/s. Find the period of its revolution.
  90. Trigonometry

    Two planes are flying at the height of 10-km. They are going at the same speed, and both traveling due north. If the planes are 3,000 km apart as measured along the surface of the earth, what angle do the lines from the planes make to the center of the Earth make?
  91. physics

    Newton assumed that a gravitational force acts directly between Earth and the Moon. How does Einstein's view of the attractive force between the two bodies differ from Newton's view?
  92. Thinking Mathematically - Geometry

    A flagpole has a height of 16 yards. It will be supported by three cables, each of which is attached to the flagpole at a point 4 yards below the top of the pole and attached to the ground at a point that is 9 yards from the base of the pole. Find the total number of feet of ...
  93. Physics

    The Earth has an angular speed of 7.272·10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 3.45·1022 kg) hits the Earth while traveling at a speed of 4.41·103 m/s (assume the asteroid is a point mass compared to the radius of the Earth) in each of ...
  94. Physics

    An electron is placed near a neutron. Which statement best describes the electrostatic force between them? a) there's no force between them since one is neutral b)there's a force of repulsion between them c)there's a force of attraction between them Isn't it a) because ...
  95. PHYSICS

    What major obstacle did Henry Cavendish face when measuring the gravitational force between two objects on Earth? A) The masses required had to be very small. B) The gravitational force between the two masses was very small. C) The distance between the two masses had to be ...
  96. Climate Change

    State two reasons why you would expect the climate in Nigeria(near the equator)to be warmer than the climate in Greenland(closer to the North Pole)
  97. physics

    A coin is placed on a vinyl stereo record that is making 78 revolutions per minute on a turntable. Find the magnitude of the acceleration when the coin is placed 5.0, 10, and 17 cm from the center of the record. The radius of Earth is about 6.38x10^3 km. A 7.40x10^3 N ...
  98. Physics

    (a) Calculate the magnitude of the gravitational force exerted on a 488-kg satellite that is a distance of 1.95 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
  99. Physics

    (a) Calculate the magnitude of the gravitational force exerted on a 430-kg satellite that is a distance of 2.81 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
  100. heeeeeeeeeeeelp physics

    Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis to be in the orbital ...
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