# 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.

227,017 results

1. ### physics

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.
2. ### physics

Suppose that 7.40 g of hydrogen is separated into electrons and protons. Suppose also that the protons are placed at the Earth's north pole and the electrons are placed at the south pole. What is the resulting compressional force on the Earth?
3. ### science

Amanda is holding a compass and notices that the north pole of the compass points toward the north pole of the Earth. She is confused because she knows from her science classes that the north poles of two magnets will repel each other. How can she explain this phenomenon? The ...
4. ### physics..

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km. kindly help me to solve this question..
5. ### physics

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.
6. ### physics

Angular diameter of sun is 17" when measured from north pole and south pole of earth. Calculate distance of sun from earth if diameter of earth is 12800km.
7. ### Science

The lines of magnetic force generated by the fluid motions of the earth's core result in the formation of the_____. a) North Pole b) north magnetic pole c) magnetic north and south pole d) North and South Poles Just need to know if my answer or right or wrong. Thanks! :) d
8. ### science

Earth titled axis affects the strength of sunlight in different places of earth's surface. If you are in an area that receiving less direct sunlight,where are you located? a) near the equator b) near the north pole c) near the south pole d) near the north or south pole*** ...
9. ### science

Earth titled axis affects the strength of sunlight in different places of earth's surface. If you are in an area that receiving less direct sunlight,where are you located? a) near the equator b) near the north pole c) near the south pole d) near the north or south pole
10. ### Physics

Planet Earth as a Spring. Assume that the Earth is perfect sphere of mass M=5.98x10^24kg, radius 6,370km, and uniform density. Imagine a long, straight tunnel through the center of the Earth, connecting the North and South poles . A capsule of mass m is dropped into this ...
11. ### earth

A man stands at the north pole, his mass is 100 kg. Later he goes and stands at the equator. Compute what force he exerts on the earth when he stands at the: a) north pole, b) equator. Which force is greater and find the difference.
12. ### trig

Two people decide to estimate the height of a flagpole. One person positions himself due north of the pole and the other person stands due east of the pole. If the two people are the same distance from the pole and a = 30 feet from each other, find the height of the pole if ...
13. ### Physics

I'm not exactly sure how to do this problem The Earth has a radius of 6.37E6 meters. Draw a picture and calculate: - The circumference of the Earth - The time for one rotation of the earth in seconds - The velocity of someone standing on the equator - The centripetal ...
14. ### Physics

I'm not exactly sure how to do this problem The Earth has a radius of 6.37E6 meters. Draw a picture and calculate: - The circumference of the Earth - The time for one rotation of the earth in seconds - The velocity of someone standing on the equator - The centripetal ...
15. ### Earth Science

On the surface of the earth, it is approximately 6,200 miles from the equator to the north or south pole. How many miles is it between 2 parallels 1 degree apart?
16. ### Earth Science

Can you help me find how many hours are received by these degrees of latitude during the winter (see details)? North Pole = 0 hrs of daylight Equator = 12 hrs of daylight South Pole = 24 hrs of daylight 66.5 degrees north = ? 23.5 degrees north = ? 23.5 degrees south = ? 66.5 ...
17. ### science

magnetic lines flow from what to what? Magnetic lines of force, acutally, are imaginary lines and they are assumed to flow form north pole to south pole outside the magnet and from south pole to north pole inside the magnet.
18. ### physics

Do electrons go to the north pole or south pole?
19. ### physics

the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?
20. ### Physics

The north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles repel. Can you resolve this apparent dilemma?
21. ### Science

On the surface of the Earth, it is approximately 6,200 miles to the North or South pole. How many miles is it between two parallels 5 degrees apart?
22. ### Science

Here's my question--- Precession of earth's axis causes- a-axial tilt b-a change in the north pole star c-seasons d-day and night My answer was a- m i rite? Precession of earth's axis caused by the centrifugal force of the Earth's rotation... =) The cause of the precession is ...
23. ### Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...
24. ### Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...
25. ### HELP SCIENCE

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically through the center ...

5. A magnetic field map shows a. the direction of the magnetic field. b. a few representational field lines. c. relative strength of the magnetic field. d. All of these choices are correct. my answer: d 6. Magnetic field lines a. can cross each other when the field is strong. ...
27. ### PHYSICS 2

A horizontal wire that runs east-west carries a steady current to the east. A C-shaped magnet is placed so that the wire runs between the poles, with the north pole above the wire and the south pole below. What direction of the magnetic force on the wire between the poles?
28. ### physics

help me please. *TRUE or FALSE* 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a magnetic field is indicated by the ...
29. ### Physics

anybody help me to my homework please.!thanks TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a magnetic ...
30. ### science

Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole
31. ### Physics

Which way does the magnetic vector B point in the vicinity of the Earth's North Pole? A. Upward B Downward C. Horizontally D. THere is no magnetic field at the North Pole
32. ### PHYSICS

please.!PLEASe PLEASE. help me. TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a magnetic field is ...
33. ### Physics

help me to my homework please.!PLEASe PLEASE. TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a magnetic ...
34. ### Science

If you were to look down on Earth from above the North Pole, in which direction would Earth appear to rotate? If you were to look down on Earth from above the North Pole, then earth would appear to rotate in a counter-clockwise direction. More info would be appreciated, thanks.

Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole
36. ### Science

Luis wanted to create a clay model of earth and the sun. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick? A. Horizontally through Earth in the direction Earth is traveling B. Vertically ...
37. ### Science

Place the North Pole of a bar magnet to the North Pole of another bar magnet. Note the distance at which they repel each other. Then place the North Pole of a bar magnet to the South Pole of another bar magnet and take note of the distance at which they attract each other. Are...
38. ### social studies

Why is there no land in the North Pole??? I really don't know the answer and last week I had it for homework,and I got it wrong. Please answer my question soon because I can't move on in class until I understand why there's no land in the North Pole when there's lots of land ...
39. ### Physics

Find the centripetal accelerations at each of the following points due to the rotation of Earth about its axis. (a) a point on the Equator of Earth ? m/s2 (b) the North Pole ? m/s2
40. ### ss

what are latitude and longitude? lines of __________ and lines __________ cross one another. they form a ____________ around the earth. lines of latitude lines of latitude are also called___________ they circle the earth parallel to the_______ they measure north and south of ...
41. ### Physics

Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie on approximately ...
42. ### Physics

Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie on approximately ...
43. ### Physics - Faucault Pendulum

A Foucault pendulum can be used to demonstrate that earth is rotating. Explain how this is possible. What differences would you notice if you used the pendulum at the North Pole, at Earth's equator, and at altitudes between two points?
44. ### Physics

The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above 2. A magnetic ...
45. ### geography

Will you check my answers for me? 1. How many states are part of the contiguous United States? 48 states 2. Is the Tropic of Cancer north or south of the equator? North of the Equator 3. What are the names of the Earth's continents? North America, South America, Antarctica, ...
46. ### Math! Helppppp

Two poles are place 15 feet apart. One pole is 8 ft high and the other pole is 16 ft high. The top of each pole is attached to the base of the other by cable which run in a straight line. -Find the slopes of the lines defined by the two ropes. -How high above the ground is the...
47. ### physics

why one cannot find the north pole of the earth using only a simple compass
48. ### Physics

A 910kg object is released from rest at an altitude of 1200 km above the north pole of the earth. If we ignore atmospheric friction, with what speed does the object strike the surface of the earth? (the polar radius of the earth is 6357 km)

1. For a bar magnet, the magnetic field lines point a. towards the South pole. b. towards the North pole. c. always towards the magnet. d. always away from the magnet. my answer: a 2. Magnetic field lines a. are straight lines. b. are always circles. c. form continuous loops. ...

The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above Would it be d? ...

If you hold a bar magnet in each hand and bring your hands together, will the force be attractive or repulsive if the magnets arte held so that A) the tow north poles are brought close together? B) a north pole and a south pole are brought together?
52. ### physics

how does the gravitational force exerted by earth on the sun compare with the gravitational force exerted by sun on the earth? and would you expect tides to be higher at the equator or at the north pole? why?
53. ### physics

A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs, between the wall and the pole provides the only ...
54. ### physics

A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs,between the wall and the pole provides the only ...
55. ### physics

A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs,between the wall and the pole provides the only ...
56. ### Physics

A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs,between the wall and the pole provides the only ...
57. ### physics

suppose that all the people of the earth went to the north pole and on a signal all jump straight up. estimate the recoil speed of the earth. the mass of the earth is 6 x 10^24 kg and there are about 6 billion people(6 x 10^9).
58. ### math

a boat travel for 4hr from pole a to pole b.then it travel for 3hr from pole b back to pole a.the distance between the two poles was 40km a.find the total time taken for the whole journey b.find the average speed for the whole journey
59. ### Math

A light pole of height 15 meter has a lamp hanging at its top . from a distance 12 meter from the base of the pole , a ball is thrown vertically upwards with velocity 5m/sec . find the rate at which the shadow of the ball on the earth moves away from the base of the pole after...
60. ### College physics

In the image below, you will see a current balance setup where the current I is coming out of the page in between the two poles of the magnet N and S. What is the direction of the magnetic field B in the region where current I is? The Image shows the north pole on the left and...
61. ### Earth

Has the issue of global warming been solved already? I mean, the Kyoto accord will expire in 2012. And are the glaciers of the North & South Pole melting even more?
62. ### Math

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do not neglect ...
63. ### physics

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do not neglect ...
64. ### Physics

A long wire that carries a current is bent into a solenoid with upward current in the front looking. If the observer could "see" the magnetic field inside this arrangement of solenoid from the right side, how would it appear? a) The observer would "see" a north pole b) The ...
65. ### math

a flagpole is 25 feet tall. a truck runs into the pole and bends it at the very bottom of the pole but the rest of the pole remains straight. after the accident we measure the angle of elevation to the top of the pole from a point 30 feet from the base of the pole in the same ...
66. ### urgent help please i have an exam !!

A light pole of height 15 meter has a lamp hanging at its top . from a distance 12 meter from the base of the pole , a ball is thrown vertically upwards with velocity 5m/sec . find the rate at which the shadow of the ball on the earth moves away from the base of the pole after...
67. ### physics

A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth?
68. ### Science

If you were flying directly south from the north pole and reached 70 degrees north latitude, how many more degrees of latitude would be left to pass over before you reached the south pole?
69. ### math

Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
70. ### math

Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
71. ### math

Describe the points on the earth’s surface that are visible to a viewer who is 100 miles above the North Pole. Would it be half of the surface area of Earth?
72. ### Physics

A 30-N non-uniform pole, 5m long, was used to carry a load of 400 N by two men. The load was hung at the middle of the pole. Find the center of gravity of the pole if the force exerted by each man on each end were 220 N and 210 N respectively.
73. ### Physics

The force on a wire is a maximum of 6.5E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on. If the pole faces have...
74. ### Physics

Three men 4, apart are carrying a heavy load on a pole. Two are one end of the pole and the third is at the other end. Where should the load be placed so that each man gives equal support?
75. ### Physics

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?
76. ### Physics

Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 700 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole?
77. ### physics

A 910kg object is released from rest at an altitude of 1200 km above the north pole of the earth. If we ignore atmospheric friction, with what speed does the object strike the surface of the earth?
78. ### physics

The force on a wire is a maximum of 7.33E-2 N when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is turned on. If the pole faces ...
79. ### Science

Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...
80. ### Science

Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...
81. ### Science- 3rd request plzzz

Which of the following is true about the magnetic field diagram below. Its shows 3 Arrows on top pointing to B A B 3 Arrows on bottom pointing to B A A is the south pole and B is the north pole B A is the north pole and B is the south pole C A and B are repelling each other...
82. ### GEOGRAPHY

How many degrees is the Arctic Circle displaced from the North Pole? I think it's 12 degrees south of the North Pole. I am not sure though. Arc·tic Cir·cle the line of latitude at 66°30'N that marks the boundary of the Arctic. So, what is 90-66°30 ?
83. ### physics

Starting from rest, a 93-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 710 N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole? What equation do you use to determine this.
84. ### Physics HELP!!!!!!!!

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. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated ...
85. ### Physics

a uniform pole 20ft long ang weighing 50lbs is used to carry a load of 180lbs.Two men,one supporting twice as much as the other support the pole to keep it in a horizontal position.How far from the center of the pole should the load be hung.?
86. ### Algebra

A wire is run between two tips of two poles. One pole is 23 ft. taller than the other pole. The poles are 37 ft. apart. How long does the wire need to be to reach between the two poles?
87. ### Angles of elevation and depression

The teet of two vertical poles of height 3m and 7m are in line with a point P on the ground. The smaller pole being between the taller pole and P and at distance of 20m from P the angle of elevation of the top T of the taller pole from the top R of the smaller pole is 30°....
88. ### Science

Describe Earth's rotation in terms of its axis and length of time to rotate. The earth's axis slowly changes in the way it points. It changes direction over time. One effect of this precession, is the changing position of the North Celestial Pole. It takes 26 000 years to ...
89. ### Physics

A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this satellite be placed? ...
90. ### SLCS

Paul and Juston are carrying a sack or rice weighing 6.02x10^2 N on a pole between them. If the pole is 2.0 m long and the load is .50m away from Juston,what force should each boy exert to make it equilibrium. Neclect the weight of the pole.
91. ### science

an ocena current moving from the equator toward the north pole or the south pole is ? Is the answer Warm in the Northern Hemisphere and Cold in the Southern Hemisphere?
92. ### maths

pole A is twice as long as pole B. pole C is 260 cm shorter than pole A. pole C is 1040 cm long, what is the total length of the three poles
93. ### To Mrs. Sue

an ocena current moving from the equator toward the north pole or the south pole is ? Is the answer Warm in the Northern Hemisphere and Cold in the Southern Hemisphere?
94. ### geography

Does the prime Meridian pass through the North or South Pole? I put it does not pass through either the North or South Pole. My teacher marked it wrong and said it passes through both. Can you please let me know if I am right and give me a web sight I can go to so I will have ...
95. ### Science

At what latitude (on Earth) is the elevation of the South Celestial Pole greatest?
96. ### physics

Two skaters, one with mass 62 kg and the other with mass 45 kg, stand on an ice rink holding a pole of length 10 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 45 kg skater move?
97. ### physics

A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth? I know how to do the work, but i can't get the...
98. ### science

a experiment to prove that a freely suspended or floating magnet always point in the north south direction plz help got my trails!??!?!?! how do i get the ans to this question?????? That doesn't look like a question. It looks like a suggested experiment to prove a hypothesis. ...
99. ### physics

At the top of a pole vault, an athlete actually can do work pushing on the pole before releasing it. Suppose the pushing force that the pole exerts back on the athlete is given by = (160 ) - (170 ) acting over a distance of 0.21 .
100. ### Physics

At the top of a pole vault, an athlete actually can do work pushing on the pole before releasing it. Suppose the pushing force that the pole exerts back on the athlete is given by F(x)= (150 N/m)x - (180N/m^2)x^2 acting over a distance of 0.20 .