# 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. ## maths

From an observer 0, the angles of elevation to the bottom and top of the flag pole are 36 degree and 38 degree respectively. The base is 200m. Find the height of the flag pole.
2. ## Math

The Angle Of Depression Of the Top And The Foot Of A flag Pole As Seen From The Top Of A buildings 145 Meters Away Are 26Dgree And 34Dgree Respectively. Find The Heights Of The Pole And The Buildings.
3. ## Physics

A 59 kg pole-vaulter falls from rest from a height of 5.5 m onto a foam rubber pad. The pole-vaulter comes to rest 0.39 s after landing on the pad. a. Calculate the athlete's velocity just before reaching the pad. b. Calculate the constant force exerted on
4. ## Physics

A 57.8 kg pole-vaulter falls from rest from a height of 5.4 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.25 s after landing on the pad. (a) Calculate the athlete's velocity just before reaching the pad. ______ m/s downward (b) Calculate the
5. ## Trigonometry

10. A person notices that the angle of elevation from where he is standing to the top of a pole is 40°. Then he backs up 12 feet and notices that the angle of elevation to the top of the pole is now 32°. How tall is the pole?
6. ## Science

SO since North changes, the answer would be b, changes in the north pole star yup you're right...... thanks, bye i gtg 2 school
7. ## physics

Estimate the energy required from fuel to launch a 1465 kg satellite into orbit 1375 km above the Earth’s surface. Consider two cases: (a) the satellite is launched into an equatorial orbit from a point on the Earth’s equator, and (b) it is launched
8. ## Physics

Jenn Suhr recently won the gold medal in this summer’s Olympic games in pole vault. Her record is 16 ft, 2 in. (She did less than that to win gold this summer.) If all of her gravitational potential energy came only from her kinetic energy, calculate (in
9. ## Physics help PLZ!!

Estimate the energy required from fuel to launch a 1465 kg satellite into orbit 1375 km above the Earth’s surface. Consider two cases: (a) the satellite is launched into an equatorial orbit from a point on the Earth’s equator, and (b) it is launched
10. ## Geography

If you are stranded at the North Pole what direction would you go to North America?
11. ## math

The length of the shadow of a pole on the level ground increases by 60 meter when one angle of elevation of the sun changes 54° to 32°.calaulate the height of the pole,correct to three significants figures.
12. ## calculus

The moment of inertia about the pole(origin) of the plane region which is inside the cardiod: r = 1 + cosO and outside the circle r =1. It's mass density is equal to it's distance from the pole..... I need someone who is way smarter than me to help with
13. ## 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
14. ## 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
15. ## math

A square canopy is supported on 4 corners by poles. Each pole is supported by 3 cables, each cable is attached to the top of the 12 foot pole and 5 feet away from the base. Find he total length needed for all of the cables.
16. ## Algebra URGENT! Conic sections

A spacecraft is in a circular orbit 150 kilometers above Earth. Once it attains the velocity needed to escape the Earth's gravity, the spacecraft will follow a parabolic path with the center of Earth as focus. Suppose the spacecraft reaches escape velocity
17. ## Astronomy

Where do you have to be on Earth to see the south celestial pole at your zenith? What is the maximum possible elevation (angle) of the Sun above the horizon at that location? On what date is this maximum elevation achieved?
18. ## Astronomy

Where do you have to be on Earth to see the south celestial pole at your zenith? What is the maximum possible elevation (angle) of the Sun above the horizon at that location? On what date is this maximum elevation achieved?
19. ## PHYSICS

RESPONDING TO AN ALARM, A 102 KG FIREMAN GETS UP FROM DINNER AND SLIDES DOWN A POLE TO THE GROUND FLOOR OF THE BUILDING, 3.3 M BELOW. THE FIREMEN STARTS AT REST AND LANDS ON THE GROUND FLOOR WITH A SPEED OF 4.2 M/S. A.FIND THE FORCE EXERTED ON THE FIREMEN
20. ## physics

A 0.700-kg ball is on the end of a rope that is 2.20 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical
21. ## physics

A 0.700-kg ball is on the end of a rope that is 2.20 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical
22. ## Physics

A floodlight with a mass of 20.0 kg is used to illuminate the parking lot in front of a library. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole. A cable that makes an angle of 30 degrees with the beam is
23. ## geography

Can you check my answers? 1. Locate the Gulf of Aden off the eastern coast of Africa. Now, write a definition of a gulf? A gulf is a part of an ocean or sea that extends into land. 2. What lines measure distances east and west of the Prime Meridian?
24. ## Math

An aero plane leaves a point on latitude 54 degree south at 10am in the morning. It flies due south at a steady speed of 800km/hr .(A)calculate it's latitude at midday. (B) at what time does it pass over the south-pole
25. ## calculus

A pole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points up the slope. The angle of elevation from the tip of the shadow to the sun is 20 degrees.
26. ## Physics

A traffic light hangs from a pole as shown. The uniform aluminum pole AB is 7.70m long and has a mass of 11.0kg. The mass of the traffic light is 27.5m. 1. Determine the tension in the horizontal massless cable CD. 2. Determine the vertical and horizontal
27. ## chapter 14, lesson 5

max cut a pole into 4 equal pieces. then he cut 2 inches off one piece of the pole. then piece left was 4 inches long. how long was the pole to before Max started cutting?
28. ## 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
29. ## Math

It was observed that the shadow of a vertical pole of 6 meters longer when the angle of elevation of the sun was 30° than when it was 60°.By means of a sketched diagram,calculate,correct to two decimal places,the height of the pole.
30. ## physics

A 0.700-kg ball is on the end of a rope that is 2.20 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 70.0° with respect to the vertical
31. ## physics

a 82.7 kg ice skater is moving at 5.88 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. she then moves in a circle of radius 0.627 m around the pole. the acceleration of gravity is 9.8 m/s^2. Find the force exerted
32. ## 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?
33. ## Physics

A mas of 100 Kg hangs from a cable secured to a steel pole and supported by another cable as shown below. Find the tension (T) in the support cable and the force (F) on the steel pole.
34. ## maths

a horse is tied to a pole by a rope if the horse moves along a circular path keeping the rope tight and describe 176 m when it has traced out 72degree at the pole find the length of the rope
35. ## geometry

Dru is challenged by her geometry teacher to estimate the height of the school flag pole without measuring. She decided to walk off the length of the shadow cast by the pole by successively walking the noted length of her shadow. If dry is 5ft 6 in.tall
36. ## 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
37. ## geometry

Dru is challanged by her geomtry teacher to estimate the height of the school flag pole without measuring. She decided to walk off the length of the shadow cast by the pole by successively walking the noted length of her own shadow. If Dru is 5ft 6inches
38. ## physics

please help i cannot figure this out A 0.27 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s. Find the momentum of the ball of dough halfway to its maximum height on the way up. and A 61 kg pole-vaulter falls from rest
39. ## physics

The cg of the 50.0 N pole held by the pole vaulter is 2.00 m from the left hand, and the hands are 0.700 m apart. Calculate the force exerted by each hand.
40. ## Geometry

a flag pole is 25 ft high. your line of sight is 5 ft from the ground. the angle of elevation is 23 degrees, how far away from the base of the flag pole are you?
41. ## Math

A circular garden has a pole in the middle. If the area of the garden is 380ft^ (^=squared) about how far is it from the pole to a point on the circle? Do I take 190 x 3.14 for my answer?
42. ## math

2poles are placed vertically in a pool.one third of the longer pole and two fifths of the shorter pole is under water.if the difference in leng 42 cm,how deep is the pool?th
43. ## geometry

A power pole broke To the nearest tenth of a meter, what was the original height of the pole opp=7 meters adj=11 meters
44. ## physcis

a flag pole is 1ooft from an observer who sights the top of the flag pole to be at an angle of 50 degrees from the horizontal. How high is the flagpole
45. ## Science

the inflexion is where the slope is constant. if the slope is positive (inccreasing as you pass a pole, what is the polarity (sign) of the pole?
46. ## math

a 20ft flag pole casts a shadow 30ft long. the pole is 25ft from the wall. how high is the wall in the nearest tenth?
47. ## Physics

Paul and henry carry a sack weighing 600nt on a pole between them. If the pole is 2m long and the load is .dm from Paul, what forrce does each boy exert?
48. ## math

if a 50ft flag pole cast a 10ft shadow how far is it from the end of the shadow to the top of the pole
49. ## calculus

A 6 foot tall man walks at a rate of 5 feet per second along one edge of a road that is 30 feet wide. On the other edge of the road is a light atop a pole 18 feet high. How fast is the length of the man's shadow increasing when he is 40 feet beyond the
50. ## Physics 20

DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
51. ## physics20

DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
52. ## physics 20

DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
53. ## physics

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
54. ## physics

DYNAMICS: A 54kg fireman slides down a pole of a distance of 3m. if the man hits the groung at 4.4m/s than what will the force of friction acting on the man due to the pole?
55. ## Biology

Suppose that during meiosis I, the paternal chromosomes always went to one pole and the maternal chromosomes always went to the other pole. How would this affect the genetic variability of the offspring? Would children tend to look more like the parents?
56. ## Maths

An aeroplane leaves a point on latitude 54degree south at 10 a.m. It flies due south at a steady speed of 800km/h. (a) what is its latitude at mid-point? (b) at what time does it pass over the south pole?
57. ## PRE ALGEBRA

solution to electrical poles that carry electrical wire seem to get smaller the further away you are. Find the apparent height of each pole if the tallest pole is 50 feet tall and there is 100 feet between poles.
58. ## Precalculus

A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.
59. ## Precalculus

A woman standing on a hill sees a flagpole that she knows to be 60 ft tall. the angle of depression to the bottom of the pole is 14 degrees and the angle of elevation to the top of the pole is 18 degrees. find her horizontal distance to the flagpole.
60. ## physics 231

A 84-kg fireman slides down a 4-m pole by applying a frictional force of 416 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
61. ## Calculus

Two poles are connected by a wire that is also connected to the ground. The first pole is 60 ft tall and the second pole is 30 ft tall. There is a distance of 90 ft between the two poles. Where should the wire be anchored to the ground (in ft, from the
62. ## Help- Math

Newtons law of gravity states that the gravitational attraction F between two bodies is proportional to 1 over the square of the distance d between their centers. (a) Using k as the constant of proportionality, express F as a function of d. (b) What
63. ## Physics Circular Motion

A swing ride at a carnival consists of chairs that are swung in a circle by 13.5-m cables attached to a vertical rotating pole. Suppose the total mass of a chair and its occupant is 170 kg, the angle θ = 53° with the vertical pole. Find the speed of
64. ## physics

A traffic light hangs from a pole as shown in the figure(Figure 1) . The uniform aluminum pole AB is 7.50 long and has a mass of 15.0 . The mass of the traffic light is 23.5 . Determine the tension in the horizontal massless cable CD. Determine the
65. ## physics

Two men are carrying a 9.00-m telephone pole that has a mass of 115 kg. If the center of gravity of the pole is 3.00 m from the right end, and the men lift the poles at the ends, how much weight must each man support?
66. ## Geometry

Jenny is 5ft 2in tall to find the height of The light pole she measured her shadow And the poles shadow what is The height of the light pole
67. ## physics (Newton's Laws)

If an acrobat who weighs 800 N is clinging to a vertical pole 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. Please, help. Thank you
68. ## geometry

To estimate the height of a flagpole, Marci, who is 5 feet tall stands so that her lines of sight to the top and bottom of the pole form a angle. What is the height of the pole to the nearest foot?
69. ## Physics

A 25.0 m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder of aluminum 3.50 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole
70. ## 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
71. ## Pre-Calculus-Trig

Two surveyors, Joe and Alice, are 240 meters apart on a riverbank. Each sights a flagpole on the opposite bank. The angle from the pole to Joe (vertex) to Alice is 63 degrees. The angle from the pole to Alice(vertex)to Joe is 54 degrees. How far are Joe
72. ## trigonometry

from a point A on the side of straight road, the angle of elevation of the top of the electric pole is 15°20'. from a point B on the same side of the road, the angle of elevation of the top of the pole is 10°52'. If the distance of A and B is 50 meters,
73. ## Pre-Calculus-Trig

A 40 foot high flagpole sits on the side of a hill. The hillside makes a 17 degree angle with horizontal. How long is a wire that runs from the top of the pole to a point 72 feet downhill from the base of the pole?
74. ## us history

Which of these statements best compares the economic development of the North and South during the first half of the 19th century? More factories and railroad lines were built in the North than in the South. The North developed more trade connections with

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
76. ## college physics

A fisherman poles a boat as he searches for his next catch. He pushes parallel to the length of the light pole, exerting a force of 245 on the bottom of a shallow lake. The pole lies in the vertical plane containing the boat's keel. At one moment, the pole
77. ## Geo

How does latitude and Longitude affect the climate in St.Jonh. I don't get it??? St.John New Brunswick I mean. The longitude doesn't affect St. John's climate since it measures distance from east and west from the Prime Meridian. However, its latitude,
78. ## geography

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

A 1.2 kg tether ball is hit so that it circles the pole with an angular speed of 3 radians/s. The length of the tether is 2m. What is the angle measured from the tether to the vertical pole?
80. ## 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
81. ## 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
82. ## AP Physics

A flagpole is to be installed on the front of an office building as shown below. The pole itself weighs 150 N and is 2 meters long. The support wire is attached at a 60º angle at a point 0.5 meters from the building. A. Find the value of the tension in
83. ## physics

what is azimuthal symmetry Consider yourself faceing North on a plane. Going East, full circle, imagine a pole each 20 degrees. As you turn, you see the poles each 20 degrees of turn. The poles have azimuthal symettry. Now imagine each third pole is twice
84. ## physics

A 52-kg pole vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
85. ## physics

A 42-kg pole vaulter running at 14 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
86. ## Physics

A 51.8 kg pole vaulter running at 11.5 m/s vaults over the bar. Her speed when she is over the bar is 1.26 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar
87. ## 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
88. ## Science

Esplain how the north pole of the bar magnet got its name?
89. ## ochem

A 74 kg man weighs himself at the north pole and at the equator.By how much?
90. ## social studies

which state in the U.S. is closest to the North Pole?
91. ## 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
92. ## Maths

An aeroplane leaves a point on latitude 54°S at 10 a.m.it flies due south at a steady speed at 800km/h. (a)what is the latitude at mid-day(b) At what time does it pass over the south pole
93. ## 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.
94. ## 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
95. ## physics

A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole flex?
96. ## Maths

If you are 21.5 South (Degrees), 150 East (Degrees) how far (in kms) are you from the South Pole?
97. ## Physics

In the figure below, the CG of the pole held by the pole vaulter is 1.54 m from the left hand, and the hands are 0.653 m apart. (Assume the vaulting pole has a mass of 3.72 kg.) -Calculate the force (in N) exerted by his right hand. (Enter the magnitude.)
98. ## trigonometry

two pieces of wire stretched from the top, M of a vertical pole to the points L and N on the horizontal ground. the angle of depression of L from N =65 degrees. N is on the opposite side of the pole(from left)at an angle of depression of 72 degrees from M.
99. ## MATH need help

Two wooden poles measured 1.35m and 0.83m in length. to make a new pole thay were attached by overlapping the ends and tying them together. the length of the overlap was 12cm. what was the total length of the new pole in metres? How do you do this?
100. ## maths trig

A flag in the form of an equilateral triangle is connected to the tops of 2 vertical poles. One of the pole has a length of 4 and the other pole has a length of 3. You also know that the third vertex touches the ground perfectly. Calculate the length of a