# 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.

100,421 results, page 54
1. ## physics

An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.

asked by tabby on May 13, 2014
2. ## math

South America’s population was 515,000,000 people in 2000 and 38,000,000 in 1900. To find the rate of increase, we should begin with subtracting to find the actual increase –

asked by Sara on August 2, 2010
3. ## Social Studies

1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

asked by YunoGasai on April 23, 2017
4. ## Social

1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

asked by Arianne on April 21, 2017
5. ## Social Studies

1.What was North Korea’s response to President George W. Bush’s 2001 threat to stop negotiations? A. North Korea immediately gave in to his list of conditions. B. North Korea resumed its nuclear program. C. North Korea sought the help of the United

asked by Arianne on April 22, 2017
6. ## math

A motorcycle leaves colorado springs, colorado, traveling north on I25 at an average speed of 47 mph. one hour later, a car leaves colorado springs, traveling south on I-25 at an average speed of 54 mph. How long after the motorcycle leaves will it take

asked by kelly on March 5, 2013
7. ## Social Studies

1.What was North Korea's response to president George W. Bush's 2001 threat to stop negotiations? A.North Korea immediately gave into his list of conditions B.North Korea resumed to nuclear program C.North Korea sought the help of the United National

asked by Joseph on May 1, 2017
8. ## Physics

Hi, I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an antique grandfather clock so that it would still keep accurate time on Mars. If the length of the pendulum on Earth is l, what

asked by Grace on February 14, 2017
9. ## Physics

This is my homework problem: "The pilot of a plane is flying at 450 mi/hr W 20.0 degrees S relative to the earth. She sees another plane flying at 350 mi/hr N 40.0 degrees W relative to her plane. What was the magnitude and direction of the plane she saw

asked by Tii on October 7, 2010
10. ## Physics 20

Astronauts in orbit appear to be 'weightless'.Suppose an astronaut with a mass of 154 KG including gear is in orbit in the space shuttle, a distance of 222 km above the Earth;s surface.Taking the Earth's radius to be 6371km, and its mass to be 5.97 X

asked by Abdurhman on January 21, 2017
11. ## physics

Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps

asked by jack on January 31, 2016
12. ## Physics

A person walks 25.0 degrees north of east for 3.10 km. How far would another person walk due north and due east to arrive at the same location? I don't understand how I could calculate the needed distance accuratly. I used 3.1*sin(25) + 3.1*cos(25). But I

asked by fred on August 25, 2009
13. ## engineering

a ship is 100km north west of cape town harbour and it sails directly north at a velocity of 30km/h in ei ght hours.calculate its resultant speed with reference to the cape town harbour in magnitude and direction

asked by Anonymous on February 20, 2013
14. ## Chemistry

The problem How many electrons does the netural atom gain or lose to form each of the following ions? 1)Ca2+ 2)I- The answer is contained in the question. If there is a "+", elecrons are lost. If there is a "-", electrons are gained. The number gained or

asked by Bryan on January 2, 2007
15. ## Physics

A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?

asked by Louis on October 8, 2011
16. ## physics

An Earth satellite moves in a circular orbit 775 km above the Earth's surface. The period of the motion is 100.1 min. (a) What is the speed of the satellite? m/s (b) What is the magnitude of the centripetal acceleration of the satellite? m/s2

asked by john on December 14, 2008

About how many people lying head-to-toe are needed to strech around the earth? Is it closest to : a) 1 million; b) 25 million; c) 100 million? (Hint: The distance around the earth is approximately 25,000 miles).

asked by Nina on April 6, 2010
18. ## Physics I

An Earth satellite moves in a circular orbit 770 km above the Earth's surface. The period of the motion is 100.0 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?

asked by Amber on September 13, 2011
19. ## chemistry

The total surface area of earth is about 1.97*10^8 square miles. the surface area of land on earth is about 5.73*10^7 square miles. find the ratio of the surface area of land to the entire planet.?

asked by ashley on September 14, 2009
20. ## math/science

The total surface area of Earth is about 1.97 × 10^8 square miles. The surface area of land on Earth is about 5.73 × 10^7 square miles. Find the ratio of surface area of land to that of the entire planet.

asked by . on September 13, 2015
21. ## science

Why did the following change occur ? The snow that covered the ground all winter began to melt,temperature rose, and flowers started to bloom. a) days became shorter b) earth's tilt on its axis shifted. c) the sun's rays became more concentrated d) Earth

asked by victoria on November 13, 2013
22. ## physics

John and Mary are skating at an ice rink. John skates at a constant speed of 6.7 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 11.5 m/s in a direction of 34° west of south, with respect to the ice. What are the

asked by Anonymous on January 25, 2015
23. ## finance

hey i cant figure this out can someone please help me Gatorade/Tropicana North America, a subsidiary of PepsiCo, produces fruit juices and other flavored beverages. Based on data from 1999 to 2001, the net sales (revenue) of Gatorade/Tropicana North

asked by tina on October 9, 2013
24. ## physics

In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

25. ## physics

In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?

asked by Vlera on January 12, 2013
26. ## Chemistry

What is the octet rule? How does the rule explain the common ion of fluorine and of calcium? The octet rule is when an element contains 8 valence electrons. The rule explains the common ions of fluorine and calcium to show how much is needed to gain/lose

asked by Sam on July 9, 2015
27. ## chemistry

what are some examples of covalent bonds and what are some examples of ionic bonds? Electrons are shared in covalent bonds. Electrons are exchanged in ionic bonds. Typical ionic compounds are NaCl, MgCl2, LiI, etc. Typical covalent compounds are CH4,

asked by Leeann on January 29, 2007
28. ## Geography

Just letting you guys know-- for one of my exams I asked this question: 'This nation is in South Asia. One of South Asia's three major rivers are in this country. The country has two climate regions, arid and semi-arid and the dominant religion in this

asked by mysterychicken on November 5, 2009
29. ## physics

The mass of the Earth is 5.972kg, and the radius of Earth is 6, 371 km. A 750 kg satellite orbits 35, 800 km above Earth in a perfectly circular orbit. 1. If the gravitational force is the centripetal force keeping the satellite in a stable cicular orbit,

asked by LESTER on November 14, 2016
30. ## physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

asked by Maggie on November 22, 2009
31. ## physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

asked by maggie on November 21, 2009
32. ## physics

An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

asked by julia on November 23, 2009
33. ## Physical Science 2

The attraction or pull of a person's body toward the earth, by the earth is called weight. The reaction to this force is the: My answer is B A. earth's surface pushing against the person's body B. person's body pulling on the earth C. person's body pushing

asked by Toni on December 31, 2010
34. ## physics

A 300 kg sailboat accelerates at 0.5 m/s^2 at an angle of 25degrees North of East. Find the magnitude and direction of the force responsible for this accelereation.

asked by Apple on September 25, 2011
35. ## maths

from a point R,300M north of P, a man walks eastwards to a place Q which is 600m from P. find the bearing of P from Q correct to the nearest degree

asked by favs on February 11, 2013
36. ## Physics

A train moving with constant speed of 54kmph moves eastwards for 30min then north for 40min find avg velocity

Does anyone know where I can find the relative location of Aruba. Does 12 degrees North latitude of the equator and 18 miles off the coast of Venezuela sound correct.

asked by Brooke on April 4, 2009
38. ## math

Earth's mass, in kilograms, is 5.97x10^24. the moon's mass is 7.34x10^22. How many times greater is Earth's mass (in scientific notation)?

asked by Michelle on March 14, 2013
39. ## Physics

Gravity on the surface of the moon is only 1 as strong as gravity on the Earth. 6 What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s2 . Answer in units of N.

asked by Dede on November 4, 2010
40. ## Physics

The radius of the planet venus is nearly the same of that of the eart but it's mass is only 80% that of the earth. If an object weighs We on the earth (a) what does it weigh on venus (b) calculate the value of g in venus

asked by Nwajei goodness on June 19, 2017
41. ## Physics

Displacement vector A with arrow points due east and has a magnitude of 2.62 km. Displacement vector B with arrow points due north and has a magnitude of 2.26 km. Displacement vector C with arrow points due west and has a magnitude of 1.4 km. Displacement

asked by Rob on September 12, 2014
42. ## chemistry

The "Chemistry in Focus" segment A Magnetic Moment discusses the ability to levitate a frog in a magnetic field because electrons, when sensing a strong magnetic field, respond by opposing it. This is called diamagnetism. Atoms that are diamagnetic have

asked by RILEY on October 12, 2010
43. ## Science

ing to Wegener's hypothesis of continental drift,? A.Earth's surface is made up of seven major landmasses. B.the continents do not move. C.Earth is slowly cooling and shrinking. D.the continents were once joined together in a single landmass.•• Correct

asked by Tanner fox on March 17, 2016
44. ## Physics

Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 3.5 1011 kg (and a radius of only 1.0 10-14 m) reached Earth, at what distance from your head would its gravitational

asked by William on February 19, 2011
45. ## physics

Help me solve this physics homework: in sense we all have kinetic energy,even when we are standing still.the earth with a radius of 6.37*10power6 m,rotates about its axis once a day.ignoring the earths rotation about the sun,what is the K.E of a 50Kg man

asked by ruru mq on March 1, 2013
46. ## science

Explain why earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this period not considered a part of Earth's

asked by FluttershyK22 on March 24, 2016
47. ## science

The earth's magnetic shield has? a) appeared only recently b)disappeared for short periods of time c)caused the earth's land masses to drift apart d)little effect on life this planet e)existed since the planet cooled Just need to know if my answer or right

asked by ant on August 18, 2010
48. ## Science

1> What 2 types of electromagnetic energy have wavelengths of 0.76 cm? 2> What is the pressure at a depth of 3000 km inside the Earth? 3> How many inches of mercury are equivalent to 974.5 millibars of air pressure? 4> Jupiter's period of revolution is how

asked by Lisa on September 14, 2008
49. ## PHYSICS

Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar

asked by Sunshin3 on January 24, 2010

Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar

asked by RANI on January 24, 2010
51. ## Physics

A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.31 that on Earth?

asked by Jacob on January 9, 2012
52. ## physics

A pendulum has a period of 0.57 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

asked by Anonymous on April 26, 2010
53. ## Science

How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.

asked by Justin on March 16, 2017
54. ## physics

A pendulum has a period of 0.90 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.29 that on Earth?

asked by ce on March 24, 2016
55. ## English

a living thing which grows in earth: plant (What does "in earth" mean? Does it mean under the ground or on the ground?)

asked by rfvv on December 7, 2010
56. ## Math

An ant weighs about 2 x 10^-5 lb. There are about10^15 ants on earth. How many pounds of an ants are on earth?

asked by Anonymous on April 4, 2011
57. ## physics

A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.51 that on Earth?

asked by Sam on March 7, 2012
58. ## Science HELP PLS

how are earth and venus similar? how is venus different from earth? provide two similarities and two differences

asked by Zach on February 26, 2016
59. ## physics

the moon is 4*8 m away from the earth Aradar signal transmitted from the earth .How much will it take to reach the moon?

asked by anand on August 30, 2011
60. ## Physics

A pendulum has a period of 4.28 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

asked by Andrew on March 10, 2013
61. ## scince

Mars=750N the value of g is 38% of that of earth what is the mass of the men on the earth and his weight of mars

asked by Rahul gupta on September 18, 2016
62. ## Physics 11

How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!

asked by Cole on November 1, 2010
63. ## phy

A pendulum has a period of 0.75 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.41 that on Earth?

asked by ami on November 10, 2010
64. ## Science

Suppose the moon were closer to Earth. How would the force of gravity between Earth and the moon be different?

asked by Cassie on February 26, 2012
65. ## math

Mr. Wong left his house and drove north for 5 blocks, then turned right and drove 6 blocks, then turned south and drove 2 more blocks. Finally, he turned right again and drove one more block to end up at the library. How many blocks east of Mr. Wong’s

asked by Destiny J on September 12, 2013
66. ## Physics

A plane intends to north with a speed of 250 m/s relative to the ground through a high altitude cross wind of 50 m/s coming from the east. Determine the bearing that the plane should take( relative to due north), A) the planes speed with respect to the air

asked by Janice on June 19, 2017
67. ## AP style

my question from last night was moved to the second page. But I asked if north central would be hyphenated in AP style.. A tutor replied in what context.. This context: He was born in Zhengzhou, China, which is the capital and largest city of Henan

asked by Blaze on February 24, 2014
68. ## Science-Damon

Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and

asked by Sara on February 6, 2010
69. ## Physics

Stan takes a trip, driving with a constant velocity of 81.5 km/h to the north except for a 22 min rest stop. If Stan's avg velocity is 66.80 km/h to the north, how long does the trip take?

asked by JP on September 22, 2011
70. ## physics

Two airplanes taxi as they approach the terminal. Plane 1 taxies with a speed of 12 m/s due north. Plane 2 taxies with a speed of 8.5 m/s in a direction 20 degrees north of west.

asked by Anonymous on January 12, 2012
71. ## physics

A person walks 25.0 degrees north of east for 3.80 km. How far would the person walk due north and due east to arrive at the same location? I did the Sin of 25 but the answer was wrong

asked by sheila on September 24, 2009
72. ## Physics

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

asked by Jonoathan on September 22, 2011
73. ## math

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

asked by Anonymous on September 25, 2011
74. ## Physics

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

asked by alex on September 26, 2011
75. ## Science/math

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

asked by Jonathan on September 24, 2011
76. ## Physics

Emily takes a trip, driving with a constant velocity of 79.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 68.8 km/h to the north, how long does the trip take?

asked by Jonathan on September 24, 2011
77. ## physics

Emily takes a trip, driving with a constant velocity of 89.5 km/h to the north except for a 22 min rest stop. If Emily's average velocity is 70.8 km/h to the north, how long does the trip take?

asked by ashley on September 12, 2012
78. ## Structure of the Earth

Explain Earth's layers by comparing Earth to a familiar object such as an avocado. How are the layers similar? How are they different? I don't really get this question...All I know is that they both have different layers consisting of different mix of

asked by Anonymous on January 4, 2011
79. ## Physics

An Earth satellite moves in a circular orbit 765 km above the Earth's surface. The period of the motion is 99.9 min. (a) What is the speed of the satellite? ______ m/s (b) What is the magnitude of the centripetal acceleration of the satellite? ______m/s^2

asked by Corey on October 11, 2015
80. ## physics

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

asked by peter on October 25, 2014
81. ## Astronomy

A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its aphelion. The craft would be launched out of low-Earth orbit by a quick burst of rockets into solar orbit, and would then "coast''

asked by keitanako on December 9, 2013
82. ## astronomy

A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its aphelion. The craft would be launched out of low-Earth orbit by a quick burst of rockets into solar orbit, and would then "coast''

asked by johan on December 3, 2015
83. ## History

Who developed the doctrine of nullification John C Calhoun? 14. I am a law that was applauded in the North but despised in the South Manufcaturesl iked me. Farmers wished I would go away My passage led to the Nullification Crisis What law am i A.Wilmot

asked by M on January 27, 2015
84. ## Physics

Find the orbital speed of a satellite in a circular orbit 3.70×107 m above the surface of the Earth. v = 3030 m/s So I've been trying to solve this problem for some time now and haven't figured it out. What I did is find orbital radius, use that to find

asked by Alvin on December 1, 2016
85. ## English

1. Plants grow in earth. 2. Plants grow on earth. 3. Plants grow in the earth. 4. Plants grow on the earth. (Which ones are correct? What does #1 mean? Does #i mean that plants grows under the earth?)

asked by rfvv on November 14, 2012
86. ## Physics

An airplane needs to fly due south. The plane can fly at a speed of 720.0 km/hr in still air. If there is a wind blowing to the northeast at 70.0 km/hr, in what direction should the plane fly to maintain its heading of due south? How long will it take to

asked by Tyler on April 21, 2014
87. ## social studies

How is Paraguay different from the other countries in the Southern Cone? 1.Almost all of its people speak a South American Indian language. 2.It has a higher percentage of people with only European ancestry. 3.Most of its people are of purely of South

asked by elizabeth on November 28, 2018
88. ## History

The Underground Railroad used escape routes that went throughout the South. Based on that fact, which of the following conclusion could be made? A) The Southern states were leaning toward emancipation of the slaves. B) Slaves were hopeful to acquire jobs

asked by Gerard Way on March 7, 2017

In South Africa, the President is elected by members of the National Assembly who are elected by the citizens. This means that South Africa has WHICH type of government? A) unitary system Eliminate B) direct democracy C) confederal system D) parliamentary

asked by School on September 1, 2015
90. ## Quantitative Reasoning (math)

Your weight on the moon is relative to your weight on Earth. Neil Armstrong weighed 360 lbs. in his moon gear while on Earth, but on the moon he only weighed 60 lbs. What is the ratio of the Earth weight to the moon weight? How much would you weigh

asked by Heather on September 11, 2014
91. ## Physics

What is the difference in shape on a graph 70 degrees south of east and 70 degrees east of south?

asked by jake on March 2, 2010

Given 257 sec, 15,000 feet per second Find the acceleration due to earth's gravity.

93. ## Regents

Where is the site of the Regents countdown for Earth Science? It has the days, hours, minutes, etc. and I can't find it. Please help. Thank you.

asked by Anonymous on May 10, 2008
94. ## science

find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.

asked by princess on February 26, 2013
95. ## Physics

Assuming the earth to be a uniform sphere of radius 6400 km and density 5.5g/c.c. find the value of g on the surface where G=6.67×10

asked by Muskaan on March 15, 2018
96. ## History

Which of these describes the location of the Gulf of Mexico? South of West Florida East of East Florida West of New Orleans South of Great Britain I believe the answer is B And please give a correct answer cause I don't want to get it wrong.

asked by Marc-Anthony on January 5, 2016
97. ## Geography

23. Most of the people in South Asia make their living from a. mining b. herding c. farming d. weaving C 25. The two religions with the most followers in South Asia are a. Hinduism and Christianity b. Christianity and Sikhism c. Hinduism and Islam d.

asked by mysterychicken on October 20, 2009
98. ## Math

faizel wants to travel from his house to the hardware store that is six blocks east and five blocks south of his home. If he walks east and south, how many different different routes can he follow from his house to the store? Can somebody help me setup

asked by Jay on April 27, 2011
99. ## physics

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

asked by fatin on June 28, 2015
100. ## Physics

Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from each celestial body exactly cancel, leaving the craft literally weightless. Take

asked by Lindsay on December 16, 2007