# 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.

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1. ## Physics

An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45∘ north of east, then 81 steps at an angle 60∘ north of west, then 49 steps due south. Assume his steps all have equal length. Save him from
2. ## math

A train is going directly South at 60 mph. An action-movie star is atop the train, running North at 6 mph. Relative to someone standing on the ground, how fast is the action-movie star moving, and in what direction? North is positive and South is negative.
3. ## Physics

A pole-vaulter of mass 60.2 kg vaults to a height of 6.1 m before dropping to thick padding placed below to cushion her fall. (a) Find the speed with which she lands. (b) If the padding brings her to a stop in a time of 0.52 s, what is the average force on
4. ## math

Oregon is about 400 miles from west to east, and 300 miles from north to south. If the image of Oregon on a map is 15 inches tall (form north to south), about how wide is the image of Oregon on the map?
5. ## economics

Can anyone get me started on this? A country has 2 regions, the North and South, which are identical in all respects except for the hourly wage and number of workers. The demand for labor in the region is Wn=\$20 - .5En and Ws=\$20 - .5Es where En and Es are

Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function 𝑑(𝑡) = 𝑡 3 − 9𝑡 2 + 6𝑡, where North is positive and South is negative. Time
7. ## physics

In a church choir loft, two parallel walls are 5.70 m apart. The singers stand against the north wall. The organist faces the south wall, sitting 0.900 m away from it. So that she can see the choir, a flat mirror 0.600 m wide is mounted on the south wall,
8. ## Math 7th

Ms.Anderson took a walk down her street. She noticed on her walk that her house is 2 blocks south of the post office, the grocery store is 1 block north of her house and her house is the midpoint between the post office and the video store. Which best
9. ## World Geography

REVIEW 1.Which of the following was one cause of the Civil War in the United States? A. The South wanted new states to allow slavery and the North did not. B. The North wanted new states to allow slavery and the South did not. C. The North opposed signing
10. ## trigonomitry

A pole 7 meters long is placed against a wall at an angle of 45 degrees, what is the height of the wall
11. ## science

if the distance between crest were 1.5 meters apart, and 2 crest pass the pole each second, what would be the speed of the wave ?
12. ## Math

John painted 1/2 of a pole white and 3/8 of it green. What is the fraction he painted?
13. ## science 10

is it possilbe to make a magnet with one pole (monopole magnet) explain
14. ## History

What was "king" and the main topic oof conversation in the south? A. politics B. sugarcane C. cotton D. Slavery Because many southerners were unwilling to sell slaves to raise funds to build factories, they had no money to invest in business. Another name
15. ## Social Studies Ms. Sue

1. What was "king" and the main topic of conversation in the South? a. politics b. sugarcane c. cotton* d. slavery 2. Because many Southerners were unwilling to sell slaves to raise funds to build factories, they had no money to invest in businesses.
16. ## Physics

Trabuchet- A payload starts its motion from rest and travels connected to the rope for 2sec. Just before it starts flying, the payload is moving at an linear acceleration of 30 m/s^2 at a distance of 5m from the pole. Find how far the payload will land
17. ## math

A 20 feet vertical pole cast a shadow of 32 feet. What is the angle of elevation of the sun?
18. ## math

a 200 metres long train passes a pole in 15 seconds what is the speed of the train
19. ## math

a rectangular box measures 4 by 5 by 2 meters. what is the length of the longest pole that can fit into the box?
20. ## math

A signal is made by placing 3 flags, one above the other, on a flag pole. If there are 8 different flags available, how many possible signals can be flown?
21. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 245 m east, 210 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
22. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances. She goes 75.0 m north, 250 m east, 116 m at an angle 30.0° north of east, and 200 m south. Find the resultant displacement from the cave entrance.
23. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 275 m east, 215 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
24. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 290 m east, 180 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
25. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 260 m east, 195 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
26. ## tsu

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 275 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
27. ## physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 225 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
28. ## chemistry

Lithium-6 has an atomic number of 3. How many electrons are in this isotope? A. 0 electrons B. 3 electrons C. 6 electrons D. 9 electrons I think C. 6
29. ## chemistry

boron-10 has an atomic number of 5. how many electrons are in this isotope? 0 electrons, 2 electrons, 5 electrons, 10 electrons. I think 10
30. ## biology

Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­­_____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore
31. ## biology

Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­­_____________________________. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore
32. ## Math

Farmer Mansfield wants to find whether the straight pipes are parallel. The distance from barn B to the north end of pipe 1 is 143 ft, and from there to the north end of pipe 2 is 42 ft. The distance from the barn to the south end of pipe 1 is 121 ft, and
33. ## math

an electric pole is 24 meter high casts a shadow of 20 meter long.find the height of the tree if it castes a shadow of 15 meter long under similar conditions
34. ## physics

a uniform pole 7m long and weighing 10kg suppoted by a boy 2m from one end man3 from other end
35. ## Math

A pole vaulter cleared the bar at 490 cm. Convert 490 cm to meters using a unit multiplier
36. ## math URGENT!!

a rectangular box measures 4 by 5 by 2 meters. what is the length of the longest pole that can fit into the box?
37. ## Math

A small ant trying to cross a pole of12 cm . It climbs 3 cm in one minute and slips 2cm in second minute
38. ## Poetry

2. Which of the following lines from the poem includes an example of alliteration? (1 point) Waiting, huddled close together Our food was gone. Our fuel was low. Amundsen had reached the Pole. We had come pursuing glory
39. ## Physics

On June 9, 1988, Sergei Bubka broke the world pole-vaulting record for the 8th time in four years by attaining a height of 6.14 m. How long did it take him to fall?
40. ## Physics

A pole-vaulter of mass 59.9 kg vaults to a height of 5.9 m before dropping to thick padding placed below to cushion her fall. (a) Find the speed with which she lands. m/s (b) If the padding brings her to a stop in a time of 0.48 s, what is the average
41. ## Physics

The Nautical Mile is internationally recognised as 1852m which is an approximation of 1' of latitude subtended to the earths surface. However it is an average and the geographical length on the earths surface of 1' of lat subtended will vary according to
42. ## science(2 QUESTIONS)

PLEASE ANSWER MY 2 QUESTIONS IN SCIENCE THANKS 3.when a negatively charged object moves in the opposite direction of an electric force field,the potential energy of the object. A.becomes zero(I PICK THIS) B.increases C.decreases D.stays the same 4.the two
43. ## physics

where must a 1200n weight be hung on a uniform, 200N pole so that a boy at one end supports one-third as much as a man at the other end?
44. ## physics

where must a 1200n weight be hung on a uniform, 200N pole so that a boy at one end supports one-third as much as a man at the other end?
45. ## Physics

A firefighter with a mass of 52 kg slides down a vertical pole with an acceleration of 3 m/s/s . The acceleration of gravity is 10 m/s/s. What is the friction force that is acting on him
46. ## Science

A man with a mass of 100 kg slides down a vertical pole with an acceleration of 8 m/s2. What is the frictional force acting on the man?
47. ## Physics

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
48. ## Physics

PLEASE ANSWER ASAP!!!!!!!!!! step by step a) find the acceleration experienced by the driver of a car traveling at 50km/h if the car hits a pole and crumples 50cm. b) repeat part a) for a car traveling 100km/h
49. ## Physics

A revolving door consists of four rectangular glass slabs,with the long end of each attached to a pole that acts as the rotation axis. Each slab is 2.60m tall by 1.50m wide and has mass 39.5 . Find the rotational inertia of the entire door. If it's
50. ## physics

Find the total displacement of a mouse that travels 1.0m north and then 0.8m south.
51. ## PHYSICS

while exploring a cave, a spelunker starts at the entrance and moves the following distances in a horizontal plane. she goes 75.o m north, 250 m east, 125 m at angle theta =30.0 north of east, and 150 m south. find her resultant displacement from the cave
52. ## MATHEMATICS

A pole of height 2m cast a shadow 1.5m long. Find the height of a tree whose shadow is 2.5m long.
53. ## social studies

2.) Why were Northern States in favor of Hamilton's protective tariff? *The tariff protected North from paying any additional fees when exporting their goods. *The tariff allowed manufactures in the North to charge higher prices for their products. *The
54. ## algerbra

sasha researched the size of zoos in her state. she found that the zoo in the north part of the state is almost twice as large as the zoo in the south. she also found that the zoo in the south part of the state has 200 fewer than twice the number of
55. ## Geography

53. Compare and contrast the societies, governments and economies of both North and South Korea. The Korean Peninsula is divided into two nations: North Korea, or the Democratic People’s Republic of Korea, and South Korea, or The Republic of Korea. North
56. ## Algebra

The ratio of North American butterflies to South American butterflies is 5:3. The ratio to South American butterflies to European butterflies is 3:2. There are 30 North American butterflies at the butterfly park. Question A. How many South American
57. ## geography

Will you check my answers please? 1. Is central America on the North or South American continent? North American 2. What are the three countries in the world with the largest land areas? Russia, Denmark, and Canada 3.What is the capital of the state that
58. ## physics

A pole-vaulter runs toward the launch point with horizontal momentum. Where does the vertical momentum come from as the athlete vaults over the crossbar?
59. ## Physics

A pole vaulter has 3500J of energy when he crosses a bar 7 metres high. How much kinetic energy will he have before he reaches the ground?
60. ## Mechanics & hydromechanics

Where a 1208 N weight must be hung on a uniform 214 m pole so that a boy at one end supports one-third as much as a man at the other end.
61. ## trig

the 40ft. pole is braced by , a wire from its top in a point 60ft. from its base up, snd 18° slope. how long is the wire?
62. ## sdvfsd

The earth has a specific tilt to it. No the sun appears to move towards the north and the south but through all the time the rays of the sun fall directly at the equator but fall at an inclined level at the other places and hence the seasons change and
63. ## PHYSICS

while exploring a cave, a spelunker starts at the entrance and moves the following distances in a horizontal plane. she goes 75.0 m north, 250 m east, 125 m at an angle theta equal to 30.0 north of east, and 150 m south. find her resultant displacement
64. ## English

Hello everybody! I have posted a question yesterday on creative classroom.Thank you for the answers.I have checkqued those web sites and picku out the activity with shoe box diorama.So my learners could make a shoe box dioramas (the topic would be
65. ## chemistry

I'm drawing a Lewis structure for hydrogen cyanide using nitrogen with a valency of 3. Would I still need 2 dots after the N or would this represent nitrogen valency 5? You need the two extra electrons for N at the end. Only the electrons involved BETWEEN
66. ## social studies... help!!

my answers are the ones with the stars.. please help. 8.The 54th Massachusetts Regiment is famous because: a. It helped win the Mexican-American War ***b. It was a famous Confederate army unit noted for its heroism in battle c. It was an African American
67. ## math

an electric pole is 24 meter high casts a shadow of 20 meter long.find the height of the tree if it castes a shadow of 15 meter long under similar conditions. [explain and make the table if direct or inverse variation]
68. ## Science physics

What is the magnitude of average force a pole vaulters exterts on a landing bag if it's 1.5 meters high and deforms by 0.5 M=60kg Height of the bar=4.5m His centre of mass is 1m
69. ## Physics

Peggy drives from Cornwall to Atkins Glen in 52 min. Cornwall is 75 km from Illium in a direction 26° west of south. Atkins Glen is 27.1 km from Illium in a direction 16° south of west. Use Illium as your origin. (a) Draw the initial and final position
70. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 19.8 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 144 kg. (a) Determine the tension in the cable
71. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.9 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 193 kg. (a) Determine the tension in the cable
72. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 11.5 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 204 kg. (a) Determine the tension in the cable
73. ## physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 16.6 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 239 kg. (a) Determine the tension in the cable
74. ## Physics

A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.4 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 291 kg. (a) Determine the tension in the cable
75. ## k

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?
76. ## geometry

a surveyor on level ground finds the angle of elevation of a 138-foot flagpole to be 47 degrees how far from the base of the pole is the surveyor?
77. ## Physics

A firefighter of mass 39 kg slides down a vertical pole with an acceleration of 3 m/s^2. The acceleration of gravity is 10 m/s^2. What is the friction force that acts on him? Answer in units of N.
78. ## math

a vertical flagpole casts a shadow of 12ft long at the same time that a nearby vertical past 8ft casts a shadow 3ft long. Find the height of the pole
79. ## physics please someone help

Peggy drives from Cornwall to Atkins Glen in 52 min. Cornwall is 75 km from Illium in a direction 26° west of south. Atkins Glen is 27.1 km from Illium in a direction 16° south of west. Use Illium as your origin. (a) Draw the initial and final position
80. ## Physics

Peggy drives from Cornwall to Atkins Glen in 52 min. Cornwall is 75 km from Illium in a direction 26° west of south. Atkins Glen is 27.1 km from Illium in a direction 16° south of west. Use Illium as your origin. (a) Draw the initial and final position
81. ## 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 southerly force is 38 N,
82. ## Physics

A roller coaster cart travelling due north at 20m/s that turns left during an interval of 4.0s without changing speed. Find the average acceleration. I understand the mathematics behind it (using pythagoras's theorem to find velocity and the formula
83. ## ALGEBRA

Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 South:
84. ## physics 111

A bicycle travels 3.2 km due east in 0.10 h, then 5.6 km at 15.0° east of north in 0.11 h, and finally another 3.2 km due east in 0.10 h to reach its destination. The time lost in turning is negligible. What is the average velocity for the entire trip? i
85. ## math

Oregon is about 400 miles from west to east, and 300 miles from north to south. If a map of Oregon is 15 inches tall (from north to south), about how wide is the map? PLEASE HELP AND EXPLAIN IT Set up a proportion: 15/300 (the ratio of inches to miles,
86. ## Physics

A bomb free of outside forces is traveling north when it explodes into exactly three pieces. (Ignore any gas molecules from the explosion that go off in miscellaneous directions.) One piece continues to travel north, while another moves straight up
87. ## an automobile is traveling north. can it have a ve

an automobile is traveling north. can it have a velocity toward the north and at the same time have an acceleration toward the south? under what circumstances?
88. ## Science

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
89. ## Trig

Charo is 50 feet from the tallest totem pole, located in Alberta Bay, Canada, which has a height of 173 feet. If Charo’s eyes are 5 feet from the ground, find the angle to the nearest degree of elevation for her line of sight to the top of the totem.
90. ## Astronomy

1. How did the geocentric model explain the retrograde motion of planets? A. Earth moves faster in its orbit and passes the other planets. B. The planets move backward when they get too close to earth. C. The planets travel in circles as they move around

5. A 1,600 kg car is moving south at 24 m/s. What is its momentum? (Points : 1) 66 kgm/s south 66 kgm/s north 38,000 kgm/s north 38,000 kgm/s south Question 6. 6. The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the
92. ## Physics

Question: Calculate the direction of Earth's magnetic field. 3 components of the magnetic field: Geographic South to North: 0.01670 mT Geographic West to East: 0.002147 mT Up to down (up is the sky, down is the ground): 0.03722 mT Calculating angle East of
93. ## Labor Econ

Can anyone get me started on this? A country has 2 regions, the North and South, which are identical in all respects except for the hourly wage and number of workers. The demand for labor in the region is Wn=\$20 - .5En and Ws=\$20 - .5Es where En and Es are
94. ## Physics

An airplane has a velocity of 580 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 92 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to
95. ## 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. (θ = 56.0°) Suppose the total mass of a chair and its occupant is 190 kg. (a) Determine the
96. ## Math

ok if the boy is 5ft tall and the flag pole is 15ft tall and 8ft long what proportion can be determaind to the lenght the boys shadow
97. ## 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.
98. ## 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?
99. ## physics

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?
100. ## 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?