# 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.

101,482 results, page 64
1. ## Travel and tourism/geography

I need to write a report on the garden route, in South Africa but I can't find the information I need. What is the garden route? Which towns form part of the garden route? Where can I find all the information I need?

asked by Zara on August 1, 2009
2. ## Physics D

A 1500-kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 13.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision? 1. what is the degree north of east? 2. how was do they

3. ## Precalculus

An airplane is flying due west at a velocity of 100 m/s. The wind is blowing south at 5 m/s. a. Draw a labeled diagram of the situation. b. Find the resulting ground speed and bearing of the airplane?

asked by Marie on February 14, 2010

Which choice does not contain a run-on sentence? A- Using the Big Dipper, you can find the North Star just follow an imaginary line through the Dipper’s two end stars. B- Using the Big Dipper, you can find the North Star. Just follow an imaginary line

asked by Skye on October 1, 2014
5. ## college essay

Please tell me if I answered the prompt and check it Choose apiece of literature you have read and describe how it has affected you. For many people, the image that comes to mind when they hear, the word slavery is the Transatlantic Slave Trade. We think

asked by Danny on November 24, 2007
6. ## physic

Lai was driving north on Hwy 75 with a speed of 56.9 m/s when she heard on a CB that a patrolman was hiding 127.3 m north of where she is. Knowing that the patrolman can start clocking the car in 2.7 seconds, Lai decided to slow to 34.2 m/s. and

asked by Shannon on August 24, 2011

A bus travel 250km south along a straight path with the average velocity of 84km/h to the the bus stop for 26 min. Then in it travel 240km with avrage 70km/h to the south.How long long did the hold trip take? What is the average velocity of the trip?

asked by taylor on September 20, 2010
8. ## science

Will we ever run out of air? Air is stuck to the planet by gravity, it won't leave. Two things are adding to the air all the time too, the planet is always releasing gasses from volcanoes and volcanic vents, and there are some meteors that are mostly ice

asked by Eva on December 9, 2006

Okay I am really stuck on this question Tip: ^ = exponent Example: 6x10^7 7 is exponent Question: Venus is the second planet from the sun. Earth is the third planet from the sun. The distance from Venus to the sun is 6.72x10^7 and the distance from Earth

asked by Angelina on November 6, 2013
10. ## math

A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?

asked by Jan on September 16, 2007
11. ## Physics (help plz)

A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?

asked by Jan on September 16, 2007
12. ## Physics

A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?

asked by Jan on September 16, 2007
13. ## Physics (help plz)

A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?

asked by Jan on September 16, 2007
14. ## Physics

A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?

asked by Jan on September 16, 2007
15. ## Physics

The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of

asked by Kristyn on March 29, 2015
16. ## Physical Science

What is the hiker's total displacement? part a of the hike: distance:4km east start time: 9:00 am end time: 9:45 am part b: distance:6 km south start time: 9:45 am end time: 10:45 am part c: distance:4 km west start time:10:45 am end time: 11:15 part d:

asked by dark1 on February 20, 2014
17. ## precal

The Census Bureau reported that the population of the United States in 1995 was 262.9 million. Referring to the statistics on the second page of the Background Information for Project 4, how many crimes committed in 1995 occurred in the South? The

asked by Anonymous on September 2, 2010
18. ## math

2.If a sledgehammer that weighs 18 newtons on Earth will weigh about 4 newtons on the planet Namar, then your weight on Namar would be about ___ times your weight on Earth. A. 0.25 B. 4 C. 0.5 D. Not enough information

asked by Julia on May 14, 2015
19. ## physical science

the diameter of the planet saturn is 10 times that of the earth but the mass of the planet is only 90 times greater than that of the earth.what is the gravitational acceleration or number gs you will feel on saturn?(8.8m.s-2)

asked by celiwe on February 16, 2014
20. ## Math

A year on Mars is 1.88 Earth years. If you are 13 years old on Earth, how old would you be on Mars? I don't know if I am supposed to multiply or divide. I also don't understand what the question is trying to state. Thanks

asked by Anonymous on October 25, 2016
21. ## physics

How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.

asked by D on February 3, 2014
22. ## maths

If the speed of light is 3x10^8m/s and the distance around the earth is 4.5x10^4 km and a plane could travel at half a speed of light, how long would it take for the plane to fly around the earth twice?

asked by Anonymous on January 6, 2016
23. ## chemistry

Radio waves travel at the speed of light which is 3.00 x 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 x 108 km from Earth?

asked by ashley on September 12, 2010
24. ## Physics

A 5.00 x 102 kg hot air balloon takes off from rest at the surface of the earth. The buoyant force lifts the balloon straight up, performing 9.70 x 104 J of work on the balloon. At the instant the balloon's upward speed is 4.08 m/s, the balloon will be

asked by Help on November 18, 2014
25. ## Physics/Barycentre

I read the Earth/Moon Barycentre is located 74/100ths from the centre of the earth towards the earths surface. As the moons orbit varies from Perigee to Apogee by more than 30,000 miles I would have thought the Barycentre would move around according to the

asked by Mike on October 15, 2007
26. ## Science

Which of the following describes the slowest change on earth's surface? A) Gravity pulls an area of wet soil and rock downward in a landslide B) An earthquake releases energy that built up below Earth's surface C) Lava explodes from a volcano on an island

asked by Bob on October 22, 2011
27. ## maths

An aircraft travels at 250km/h in still air. If a wind of 50km/h blows steadily from the southwest and the pilot wishes to fly due north, find the course he must set and the ground speed of the aircraft. On the return journey the wind speed and direction

asked by Alhassan A. fuseini on June 22, 2017
28. ## Inorganic chemistry

E naught cell for the following galvanic cell is +0.254V Hg2^2(aq)+2I^-(aq) ==> 2 Hg(l) + I2(s) What is delta G naught for this reaction? Delat G naught = -nFEnaught n = the number of moles of electrons transferred between oxidizing and reducing agents as

asked by Steve on April 14, 2009
29. ## math

joe walked 4 miles north, 9 miles east then 8 miles north and 7 miles east if Al decides to walk straight back to where he started how far must he walk?

asked by blake on November 11, 2012
30. ## Algembra

a train leaves a station and travels north at 85 km/hr. Four hours later, a second train leaves on a parrallel track and travels north at 125km/hr. How far from the station will they meet?

asked by Ann on July 14, 2011
31. ## Physics

A rock (m = 1.5 kg) moving at 4.2 m/s north collides with a ball (m = 0.061 kg) that is initially at rest. What is the velocity of the rock after the collision if the velocity of the ball after the collision was 8.4 m/s north?

asked by Zach on January 15, 2012
32. ## physics

A plane passes over point A with a velocity of 8000 m/s north. Forty seconds later it passes over point B at a velocity of 10000m/s north. What is the plane's acceleration from A to B?

asked by ....... on October 27, 2011
33. ## physics

a truck is moving 15m/s North. after 7.9 has elapsed it is moving 55m/s North. determine the truck's acceleration and determine its displacement during the elapsed time.

asked by Anonymous on December 13, 2011
34. ## chemistry

Criticize the following statements. 1. In an ionic compound, the number of cations is always equal to the number of anions. [Is it ok to say 'not always'?] 2. The molecular formula for strontium bromide is SrBr(sub 2) [what's wrong wih this?] 3. The mass

asked by Chris on September 25, 2006
35. ## physics

Two racing boats set out from the same dock and speed away at the same constant speed of 94.0 km/h for half an hour (0.500 h), the blue boat headed 26.0° south of west, and the green boat headed 38.2° south of west. During this half-hour (a) how much

asked by ... on January 24, 2013
36. ## PhysicsIn what direction relative to north must ca

Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5

asked by Alyssa on February 9, 2012
37. ## physics

Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 15.5 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick

asked by Anonymous on March 1, 2011
38. ## Physics

A Car moving North at 9 m/s strikes a stationary car of equal mass. The first car moves off after the collision at an angle of 30 degrees West of North, with a speed of 6 m/s. What is the speed of the second car after the collision? My resources have poor

asked by BB on September 18, 2014
39. ## Science

I can't find this answer in my book but can someone tell me if its right please? When you remove electrons from a metal cup, the cup becomes: negatively charged - positively charged or ionized? I think it is negatively charged. Thanks

asked by Sue on October 9, 2012
40. ## Physics

The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force Fsm that the sun exerts on the moon is perpendicular to the force Fem that the earth exerts on the moon. The masses are: mass of sun = 1.99 × 10^30 kg,

asked by Rash on September 28, 2018
41. ## Astronomy

Consider an asteroid of radius 2 km and density 2,500 kgm3 impacting the Earth. When it collides with the surface its kinetic energy is, to a large extent, dumped into the environment, some as heat vaporizing rock and some as mechanical energy throwing

asked by sam on December 23, 2012
42. ## More Physics

The diagram below indicates three positions to which a woman travels. She starts at position A, travels 3.0 km to the west to point B, then 6.0 km to the north to point C. She then backtracks, and travels 2.0 km to the south to point D. a) What is the

asked by Ellie on October 29, 2006
43. ## Earth space science

I need help with this. the map doesnt show anything and idk how to post the map on here... Match the cities A,B,C, and D with the weather description of the surface model (To the right of each letter) a. city A b. City B c. City C d. City D A. Pressure of

asked by Selena on November 14, 2013
44. ## Science

where are electrons located on an atom?

asked by JACKSON on December 11, 2012
45. ## Chemistry

How many protons, nuetrons, and electrons are in 18 2- O 8

asked by Meg on March 31, 2010
46. ## Chemistry

How many valance electrons are there in [(C2H5)4N]+ ?

asked by Brian on March 14, 2013
47. ## chemistry

How many unpaired electrons for cr3+

asked by donald on January 30, 2017
48. ## chemistry

what ion has 12 protons and 10 electrons?

49. ## chem.

how many valance electrons does nitrogen have?

asked by me. on June 5, 2008
50. ## Science

How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two

asked by Plz Help! on March 3, 2016
51. ## Chemistry

How many valence electrons are in Na then in the 1+ion of Na?

asked by Camilla on November 12, 2011
52. ## science

how many electrons at most can occupy a given orbital?

asked by mic on October 18, 2010
53. ## Chemistry

how many electrons are in 3.70 x 10^23 atoms of carbon 13?

asked by Emily on September 16, 2010
54. ## SCIENCE/CHEM

how many electrons can be contained in all orbitals with n=4??????

asked by Andy on May 12, 2010
55. ## Biology

What is the path that electrons take in C3 photosynthesis?

asked by Anon on February 20, 2017
56. ## chemistry

the # of electrons in an atom of Iron-56 is

asked by hermosa on September 14, 2010
57. ## chemistry

ho electrons are there in a silicon atoms?

asked by merieka on February 18, 2015
58. ## Physics

How many electrons make up a charge of -30.0 ìC?

asked by Laila on May 12, 2010
59. ## Chem

I'm not sure about this: Rank from most to least valence electrons- Xe, In, I, Sb, Rb Thanks -MC

asked by mysterychicken on February 20, 2014
60. ## Chem

Why are electrons paired in orbits?

asked by Lena on September 21, 2009
61. ## Chemistry

How many electrons are in oxide and in oxygen

asked by Tony on March 14, 2012
62. ## Physical Science

If element X has 81 protons, how many electrons does it have?

asked by Emma on January 11, 2017
63. ## chemistry

asked by lydia on August 31, 2017
64. ## chemistry

which element would have 2 electrons and +1 charge which element would have 18 electrons and +3 charge.

65. ## Chemistry

How many d electrons are there in MnO4-? please explain.

asked by Bob on May 18, 2011

How do we know which plate has an excess of electrons?

asked by angy on April 12, 2016
67. ## science

can you give me a websight on electrons.

68. ## chemistry

How many valence electrons are there in BrF3?

asked by Jenny on October 1, 2009
69. ## chemistry

How many electrons are actually in the composite band for Fe ?

asked by Anonymous on October 11, 2008
70. ## chemistry

which element is more likely to gain electrons Na, F, or Ne?

asked by Anonymous on January 18, 2011
71. ## science

how many valance electrons do Bromine have

asked by Frike on September 27, 2008
72. ## Chemistry

How many valence electrons does phosphourous have

asked by Lauren on November 18, 2007
73. ## science

how many electrons does a carbon atom have?

asked by emily on October 10, 2007
74. ## science

how many electrons are in the sodium sulphate?

asked by jailos on January 31, 2016
75. ## chemistry

what does the spectrum of hydrogen tell us about its electrons?

asked by Mia on February 16, 2016
76. ## jinah coloege

how many electrons does a charge of 1.63 μc represent

asked by ali amir on March 3, 2015
77. ## geography

where are all the mountain ranges in the USA here are the ones I can think of right now: rockies sierra nevada cascades appalachians http://en.wikipedia.org/wiki/List_of_mountain_ranges#North_America Here is a list of mountain ranges in North America.

asked by Jazmyn on May 3, 2007
78. ## History

In what region of the US were most of the nation's cities located in the 1850s? North** South East West  Which of the following is a reason Southern states seceded from the Union? They wanted to support the Union. They wanted to abolish slavery. They

asked by Anonymous on March 23, 2018
79. ## chemistry

Why is there a decrease in electron affinity going from lithium to sodium? A. There is a stronger nuclear charge, with no additional shielding electrons or number of shells. B. There are fewer spaces in the valence shell in which to place the added

asked by Morgan on February 18, 2015
80. ## physics repost

If Earth shrinks in size such that its shape and mass remain the same, but the radius decreases to 0.21 times its original value, find the acceleration due to gravity on its surface. (6378.1/0.21)(9.80) = 2.97 m/s^2

asked by Jon on April 3, 2008
81. ## physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and ùE = 1.157 x 10-5 rev/sec.

asked by Qay on December 4, 2010
82. ## physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and We = 1.157 x 10-5 rev/sec.

asked by qay on December 4, 2010
83. ## physics

If Earth shrinks in size such that its shape and mass remain the same, but the radius decreases to 0.21 times its original value, find the acceleration due to gravity on its surface. (6378.1/0.21)(9.80) = 2.97 m/s^2

asked by Jon on April 2, 2008
84. ## Physics

Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated.

asked by James on March 29, 2009
85. ## Physics

Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated.

asked by James on March 30, 2009
86. ## physic

Can somebody shows me how to calculate for part c. the answer key is 1.365h. A jetliner travels with a constant speed of 573.7 km/h relative to the air to a city 780.1 km due south. (a) What is the time interval required to complete the trip if the

asked by joy on February 5, 2018
87. ## Math

Orienteering is a sport that involves navigating your way to a series of checkpoints with the aid of a map and compass. The goal is to find each point on the map as quickly as possible. A typical compass used for orienteering is divided into 360 degree

asked by Cameron on June 6, 2016
88. ## Social Studies

Because General Thomas J.Jackson stood his ground at the First Battle of Bull Run,his troops nicknamed him what? Thomas "Stonewall" Jackson? The Civil War began when the south fired on Fort Sumter.What city/state is Fort Sumter in? Charleston,South

asked by Neon on April 24, 2012
89. ## History

how did the end of World war 1 affect farmers in south carolina? A.the price of crops fell,so farmers no longer enjoyed the prosperity they knew during the war B.most rural farmers gained electricity and running water. C.the boll weevil appeared in

asked by Help me,plz on March 30, 2015
90. ## Physics

A crow flies in two successive displacements to a point that is 80 m to the west. Its first displacement is 80 m in a direction θ = 50° west of north. What is the magnitude of its second displacement? What is its direction as measured by the angle θ

asked by Z32 on September 2, 2010
91. ## Physics

Problem: As you walk to class with a constant speed of 1.60m/s , you are moving in a direction that is 20.8∘ north of east. Part A How much time does it take to change your displacement by 22.0m east? Part B How much time does it take to change your

asked by Big boss1 on December 23, 2014
92. ## Physics

(a)Assuming that only gravity is acting on it, how far does an electron have to be from a proton so that its acceleration is the same as that of a freely falling object at the Earth’s surface? (b)Suppose the Earth were made up only of protons but had the

asked by Brian on July 29, 2010
93. ## Chem

so I have a set of fill in the blanks for symbol, atomic number, mass number, protons, neutrons electrons and charge. Protons: 6 Neutrons: 8 Electrons: 2 I said the atomic number was 6, the mass number was 12, and the charge was +4. The only thing I was

asked by Em on May 28, 2009
94. ## social studies

What are some resources that countries in the North have. Please LIST the resources. DON'T give me any sites. I tried to find some resources but I couldn't. Please help me. THANKS!:):):):):):):):):):):):):):)

asked by rakhi on May 22, 2010
95. ## Science

According to science, the fastest speed posssible for anything is the speed of light. The speed of light is about 186,000 mies per second. That means that in one minute, lighttravels 11,160,000 miles. The star nearest Earth is the Sun. It's about

asked by Rafi on July 8, 2012
96. ## Math

A geosynchronous equatorial orbiting satellite orbits 22,300 miles above the equator of Earth. It completes one full revolution each 24 hours. Assume Earth's radius is 3960 miles. a. How far will the GEO satellite travel in one day? b. What is the

asked by Mike on November 18, 2007
97. ## Life Orientation

Hi I am a matric learner and I am having trouble with an lo portfolio assignment. it is about environmental issues and im stuck. I need to identify and describe 3 environmental health hazards that cause ill health, accidents, crisis and disasters within my

asked by Ashley on May 1, 2013
98. ## Geography

24. The South African government changed its policy of apartheid in 1990 and 1991 because of a. the policy's failure to eliminate racial discrimination b. promises of economic aid from major industrial nations c. international sanctions and an increase in

asked by mysterychicken on October 28, 2009
99. ## physics

A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell

asked by Mandaleigh on February 10, 2012
100. ## Chemistry

A gas in a discharge tube consists entirely of ions of the same element, of the same charge. Each ion has only one remaining electron. The voltage between the electrodes of the gas discharge tube is increased from zero. Electrons are accelerated across the

asked by Chemq on March 25, 2013