# 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.

99,728 results, page 11
1. ## Physics

A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
2. ## Physics

A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
3. ## Physics

A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N
4. ## trig

a vertical pole 3 meters tall casts a shadow 1.8 meters long. what is the angle of the elevation of rhe sun to the nearest minute?
5. ## Physics

A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
6. ## Physics

A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
7. ## Physics

A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
8. ## PHYSIC

A pole-vaulter just clears the bar at 4.07 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight?
9. ## Math Geometry

The sun rises at 6am; At noon the sun is directly overhead. The height of a pole is 8m tall. What is the length of the shadow at 11am?
10. ## Physics

A pole-vaulter just clears the bar at 4.42 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3800 J. What is his weight?
11. ## physcial science

What creates a magnetic field? A. charged particles that do not move B. moving electric charges C. gravity D. an isolated magnetic pole
12. ## ELA

How does Squeaky feel about taking care of Raymond? A.Raymond has climbed a fence. B.The May Pole gets in the way. C.The finish is very close. D.Mr. Pearson speaks too softly.
13. ## PHYSICS

The fishing pole below (F = 94 N , = 1.90 m) makes an angle of 20.0° with the horizontal. What is the torque exerted by the fish about an axis perpendicular to the page and passing through the fisher's hand? i TRIED doing fdsinthetha=(1.90*94*sin20) this
14. ## Science

which of these statements provides evidence to the fact that oceans influence climate by transporting water from one place to another? A)warm ocean water off the east coast of Florida affects the climate of Europe. B)warm ocean water off the east coast of
15. ## geography

most known mineral deposits in the region are located: A)along thepacific coast and south of the equator B)along the atlantic coast and south of equator C)along the pacific coast and north of the equator D)along the atlantic coast and north of the equator
16. ## Physics

On the map, let the +x-axis point east and the +y-axis north. A)An airplane flies at 990 km/h northwestward direction (i.e., midway between north and west). Find the components of its velocity. B)Repeat for the case when the plane flies due south at the
17. ## analytic geometry

1. The orbit of the earth is an ellipse with the sun at a focus, the semi-major axes 93 million miles and the eccentricity is 1/60. Find the greatest and least distance of the earth from the sun. 2. A battle shipping is sailing at a straight line towards
18. ## Social Studies

You are in europe and you want to travel to australia in which direction will you go? South east You are in the eastern australia and you want to travel to china in which direction will you go? North west You live in Europe and you want to visit South
19. ## Pre-Calc

The Greek mathematician Eratosthenes (ca. 276-195 B.C.) measured the circumference of the earth from the following observations. He noticed that on a certain day the sun shone directly down a deep well in Syene (modern Aswan). At the same time in
20. ## Geography

Where can I find a map of the North and South Poles when it is always night time for half a year?
21. ## physics

pls explain to me how you add 65km{North 85 degreesWest], 3500m[South 10 West}, 6000m{East 70 degrees South], 54km[North 60 degrees East]. pls explain to me how i should add these vectors. I really need help. pls help
22. ## Language Arts

why does squeaky not know at first who has won the race in raymond's run? A)Raymond has climbed the fence B)The May Pole gets in the way C)The finish is very close*** D)Mr. Pearson speaks too softly
23. ## Geometry

Guy wires 80 feet long support a 65 foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?
24. ## eastern michigan

A pole-vaulter just clears the bar at 4.24 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3500 J. What is his weight?
25. ## math

Guy wires 80 feet long support a 65-foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?
26. ## social studies(World Geogrophy)

Which sea is the largest: North,Mediterranean,caspian,OR South China???????:( I think it is South China..??:):(
27. ## Math

My Question is : A plane with an air pf 192 miles per hour is headed on a bearing of 121 degrees. A north wind is blowing ( from north to south ) at 15.9 miles per hour. Find the ground speed and the actual bearing of the plane.
28. ## physics

Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.
29. ## math

A building cast a shadow 42m long. At the same time, the shadow cast by a 34 cm tall pole is 86 cm long. Find the height of the building
30. ## Trigonometry

The shadow of an electric pole is 5 m. long when thr angle of elevation of the seen is 60 degrees. Find the length of the shadow when the angle of elevation of the seen is 45 degrees
31. ## math

The shadow of an electric pole is 5 m. long when thr angle of elevation of the seen is 60 degrees. Find the length of the shadow when the angle of elevation of the seen is 45 degrees
32. ## appliance repair

The rotor in a shaded-pole motor consists of a. coils energized by alternating current b. a short-circuited loop of copper wire c. a permanent magnet d. an iron cylinder
33. ## Social Studies

Why were Northern states in favor of Hamilton's protective traffic? The traffic protected the North from paying any additional fees when exporting their goods. The traffic allowed manufacturers in the North less expensive than imported goods. The traffic
34. ## English- Peer Edit

Can someone look over this essay and peer edit it for me? Just the basic grammar/spelling/structure of the essay would be great. It's on why I believe the the civil war broke out for history. Pay no attention to the formatting. Thank you. :-) The Civil War
35. ## U.S History - pls check my answer :)

Document E: HOUSE OF REPRESENTATIVES vote on whether to declare war against Britain STATE YEAS NAYS NORTH N.H. 3 2 MASS. 2 12 R.I. 0 2 VERMONT 3 1 CONN. 0 7 MIDDLE N.Y. 7 8 N.J. 2 4 PA. 9 11 DEL. 0 1 MD. 6 3 SOUTH VA. 14 5 N.C. 6 3 S.C. 8 0 GA 3 0 KY. 5 0
36. ## Physics

A hiker starts at his camp and moves the following distances while exploring his surroundings: 65.0 m north, 2.00 ✕ 102 m east, 1.10 ✕ 102 m at an angle 30.0° north of east, and 1.50 ✕ 102 m south. (a) Find his resultant displacement
37. ## Chemistry

What property of nonmetallic elements makes more likely to gain electrons than lose electrons? Non-metals already have outside shells that are more than half filled (escept for group 4 elements) and it is easier to fill the shell by adding 2 or 3 electrons
38. ## Geometry and using Pi

How big was the Flying Saucer? In the 1951 science fiction movie classic The Thing from Another World, a group of scientists and soldiers discover a recently crashed alien spaceship buried under a few feet of ice near the North Pole. The party spreads out
39. ## physics

Assume the Earth's magnetic field is 51.3 µT northward at 60.0° below the horizontal in a particular city. A tube in a neon sign stretches between two diagonally opposite corners of a shop window—which lies in a north–south vertical plane—and

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up
41. ## trigometry

vertical pole 20 feet high is sighted horizontally from a point 75 feet from its base up the sloping side site of a hill on which it rest.what is the inclination of the slope?
42. ## Language Arts

Which sentence contains a proper noun? A.We danced around the May Pole B.We went to a dance last weekend C.They ran in a special race every year D.Her mother came to watch the race Is the answer A?

At a certain time, a vertical pole 3 meters tall casts a 4 meter shadow. What is the angle of elevation of the sun? Round your answer to the nearest meter
44. ## physics

A tapering wooden telegraph pole is 15ft long and its center of gravity is 6ft from one end. It weighs 400lbs. What force is required to lift each end?
45. ## Physics

if an acrobat who weighs 800 N is clinging to a vertical pol using only his hands, neither moving up nor down can we determine the coefficient of static friction between his hands and the pole? Explain your answer.

A student throws a baseball from the ground to the top of the flag pole. If returns to the ground in 4.00s what it the height of the flagpole? Please show all work need help have a test comine up
47. ## Geography

if you traveled south from South America, What is the next continent you would reach? Do you have a globe you can look at? If not, do you know which continent is located at the very southern-most point of the earth? if you traveled south from south
48. ## physics

Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 17.0 m, B = 10.0 m, C = 11.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the
49. ## maths

A man walks 40m north then 30 m east and then 40 n south. Find the displacement from the starting point?
50. ## American History

I need to find good resources on the changing North-South relations between 1859 and 1863
51. ## Social Studies 8R - HW Qs. Help! (FAST!)

The north lost more soldiers in the Civil War than the South did. Why was it easier for the north to recover from the war?
52. ## physics

A person standing on Earth at 44 degrees 9 minutes North, how fast is he rotating around the Earth in mph?
53. ## English - Native speakers

Do you write North South East West with a capital letter? Why do you write then: He lives in north London?
54. ## physics

A truck is traveling at 19 m/s to the north. The driver of a car, 460 m to the north and traveling south at 26 m/s, puts on the brakes and slows at 3.5 m/s2. Where do they meet?
55. ## geometry

A flagpole has a height of 10 yards. It will be supported by three cables, each of which is attached to the flagpole at a point 4 yards below the top and attached to the ground at a point that is 8 yards from the base of the pole. Find the total number of
56. ## Science

1. The south pole of a magnet is held 2 inches from the north pole of a second magnet, and the force between them is measured. If the magnets are moved to 4 inches apart, the force will __________. A. not change B. be doubled C. be halved D. be quartered
57. ## Earth science

The following questions are based on the “Mt. Dome, California,” quadrangle (Figure 33-2 found on page 228 of the Laboratory Manual; enlarged to scale 1:48,000; contour interval 40 feet) and the stereogram of the same region (Figure 33-3 found on page
58. ## Maths

Two wires support an electricity pole. if the wires make angles of 58°and 67° with the ground and |AB|=21m, calculate the lengths of the wires
59. ## chs

Two wires support an electricity pole. if the wires make angles of 58°and 67° with the ground and |AB|=21m, calculate the lengths of the wires
60. ## Physics

65 kg pole vaulter running at 10.2 m/s vaults over the bar. if height of bar was set at 4.96 m how fast was he moving as he cleared the bar
61. ## physics..help PLZ!!

An object undergoes a displacement while being acted on by a constant force directed to the north. The work done on this object by the force is positive during the displacement. Which statement is necessarily true about the average velocity of the object
62. ## chem

In 1897 the Swedish explorer Andree tried to reach the North Pole in a balloon. The balloon was filled with hydrogen gas. The hydrogen gas was prepared from iron splints and diluted sulfuric acid. The reaction is given below. Fe(s) + H2SO4(aq) FeSO4(aq) +
63. ## Geology/Earth Science

1. In what climate and on what rock type would you expect a)Karst formation b)Crystal growth; to occur? 2. Explain the process by which potholes in a road get bigger. 3. Why in central Ontario, does the south and southwest side of a building weather faster
64. ## Geogrophy

In which state is Kennedy a city? I looked on google and found a Kennedy, MN. This site shows 11 states with towns named Kennedy. http://www.astro.com/atlas/horoscope?country_list=US;expr=Kennedy&first_hit=1 help i need some info teacher said i could ask u
65. ## HISTORY

The North won the Civil War because A. they had superior numbers of military forces B. the South’s principle of States’ Rights sometimes prevented them for working together successfully C. the North’s naval blockade prevented the South from selling
66. ## Right Hand Rule

Consider an electron near the Earth's equator. In which direction does it tend to deflect if its velocity is directed in each of the following directions? (a) downward: WEST (b) northward . (c) westward d) southeastward I go the first one right using the
67. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (è = 60.0°) Suppose the total mass of a chair and its occupant is 222 kg
68. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (è = 60.0°) Suppose the total mass of a chair and its occupant is 222 kg.
69. ## U.S.History

A major failure or Reconstruction was that a. the South's cotton production never recovered b. war debts remained unpaid c. racist attitudes continued in the North and South d. no African Americans were voted into Congress any idea on this
70. ## science

a region of magnetic force is known as a _______________ magnetic field. You could also be thinking of magnetic pole.
71. ## science

the alkaline-earth metals react similarly because they all have the same number of electrons in their outer energy level. Which group contains the alkaline-earth meatals?
72. ## Calculus

A square piece of canvas measuring 10 ft. by 10 ft. is to be used to make a pup tent with open ends as shown. How long should the center pole be if the volume covered by the tent is to be maximum?
73. ## Physics, newtons laws

A 20.0 gram mass is attached to a 120 com long string. It moves in a horizontal circle with a constant speed of 1.50 m/s. What is the degree is angle between the pole and the string?
74. ## Biology

9. The restriction endonuclease AluI leaves blunt ends on DNA fragments after digestion. These blunt ends a) form hydrogen bonds with the blunt ends of other fragments produced by AluI b) are fully base paired c) have only one unpaired base d) always
75. ## physics

A girl drives 3.9 km north, then 13.1 km to the northwest, and finally 4.58 km south-southwest. What is her displacement in terms of the unit vectors with pointing east and pointing north?
76. ## Physics

A biker rides700m north 300m east 400m north, 100m west, 1200m south 300m east and finally 100m north .Draw the path of motion of the biker. What distance did he cover?What was his displacement?
77. ## maths

Two pole of heights 6m and 11m stand on a plane ground. If the distance between their feet is 12m, determine the distance the distance between their poles. Please help me its urgent
78. ## Language Arts (CHECK ANSWERS)

1. You already know that Anansi is a trickster. What does this tell you about the outcome of the folktale? (1 point) A: Everything will turn out the best possible way for all the characters. B: Everything will turn out the best possible way for Anansi. C:
79. ## science

A ship sailed 15 km north, then 20km east followed by 10km south. Find its displacement from its starting point
80. ## Vibration and Wave Fundamentals

Vibration and Wave Fundamentals 1. A machine gun fires 10 rounds per second. The speed of the bullets is 300 m/s. (A.) What is the distance in the air between the flying bullets? ____ ANSWER=30 (B.)What happens to the distance between the bullets if the
81. ## Math

Michele wanted to measure the height of her school’s flagpole. She placed a mirror on the ground 48 feet from the flagpole, then walked backwards until she was able to see the top of the pole in the mirror. Her eyes were 5 feet above the ground and she
82. ## Mechanics & hydromechanics

Three forces pulling on a body are in equilibrium.The direction of one is due south, the direction of another is 80 degrees east of north, and the third force acts in the direction of 35 degrees west of north.If the magnitude of the southerly force is 38
83. ## Science- Electric and Magnetic Potential Energy

1. At which position will the bar magnets most likely experience the least magnetic potential energy between them? D - position 4 2. A positively charged test object is moving toward the positive source charge in an electric field. B - It's potential
84. ## Physics

The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.09 m/s. He starts from the south bank of the river and wants to reach the north bank by travelling straight across the river. The boat has a speed of 6.44
85. ## Need Help Physics

The captain of a boat wants to travel directly across a river that flows due east with a speed of 1.09 m/s. He starts from the south bank of the river and wants to reach the north bank by travelling straight across the river. The boat has a speed of 6.44
86. ## chemistry

Why do induced dipole-induced dipole forces increase as the number of electrons in a molecule increases? a. More electrons make the electron cloud more polarizable. b. More electrons means that there are more protons in the nuclei which hold the electrons
87. ## geometry

a person is standing 40ft from a flagpole and can see the top of the pole at a 35 degree angle of elevation. the persons eye level is 4ft from the grond. what is the height of the flagpole to the nearest foot
88. ## socialstdies

Which of the following was an advantage of the South at the beginning of the Civil War? (1 point) The South had agricultural products to provide food for the army. The South had many factories that created superior machinery. The South had a more advanced
89. ## 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
90. ## English

1. Read the following lines from "Thoughts of Hanoi." Brother, How is all that now? Or is it obsolete? Are you like me, Reliving the past, Imagining the future? Do you count me as a friend or am I the enemy in your eyes? Brother, I am afraid That one day
91. ## Math

Two trucks leave the truck stop at the same time, one heading north and one heading south. The truck driving south is driving 15 miles per hour slower than the truck driving north. How fast is the slower truck traveling is they are 1,250 miles apart after
92. ## Physics

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force
93. ## Help with physics!

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force
94. ## Physics 2

A 60 cm long wire is oriented from east to west directly above the equator and carries a current of 5 A (toward the east). What is the magnitude and direction of the magnetic force on this wire due to the earth’s magnetic field (30 µT oriented south and
95. ## pre cal

assuming that Earth is a sphere of a radius 6378 kilometers, what is the difference in the latitudes of Lynchbug, Virginia, and Myrtle Beach, South Carolina, where Lynchbug is 400 kilometers due north of Myrtle Beach?
96. ## Hyde memorial secondry school

A pole 6m long leans against a vertical wall so that it makes an angle of 60 with the wall calculate the distance of the foot of the ladder from the wall.
97. ## trig

if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3
98. ## social studies help!

How did the Fugitive Slave Act and the Kansas-Nebraska Act further divide the North and South? What role did the concept of popular sovereignty play in these conflicts? Do you think there was any way to avoid the violence that came out of this era? what I
99. ## science

displacement vectors of 5km north, 3km east, 2km south, and 3km west combine to a total displacement of? 3km north 13km west 0km 2km south I think 13km west
100. ## History

Robert E Lee's major reason for invading north territory in 1863 was to A.Win foreign recognition for South B.Obtain military supplies C.Break the union blockade D.Destroy the north's industrial capacity A?