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 52
1. Science

asked by Anonymous on January 23, 2011
2. physics

need the formula to find jupiters orbital period in earth years

asked by deb on January 15, 2008
3. science

churvas mass is 66kg. find his weight on earth and on the moon.

asked by james harold on October 11, 2011
4. physics

find the moment of inertia of the earth. Radius is 6,000 km and mass is 6 x 10^24 kg

asked by chloe on May 6, 2014
5. Science

Find your mass if a scale on Earth reads 650N when you stand on it.

asked by Jennifer on March 24, 2008
6. science

churvas mass is 66kg. find his weight on earth and on the moon.

asked by james harold on October 11, 2011
7. U.S History

Which of these describes the location of the Gulf of Mexico? A. South of West Florida B. East of East Florida C. West of New Orleans D. South of Great Britain I think its A.

asked by Student on January 5, 2016

Examine the evidence of the Earth's shape. The sharp horizon at first suggests a flat Earth with an edge. But as you walk toward the horizon, the "edge" recedes ahead of you, implying that the Earth's surface is curved. Look also at a ship sailing out to

asked by jay on June 14, 2011
9. Physics

Taking the age of Earth to be about 4 ✕ 109 years and assuming its orbital radius of 1.5 ✕ 1011 m has not changed and is circular, calculate the approximate total distance Earth has traveled since its birth (in a frame of reference stationary with

asked by Heather on November 19, 2017
10. Physics

.) Beth launches a rocket out in the courtyard. It stays in the air for 7.25 seconds before coming back down. a.) How high did it get? b.) With what velocity did it hit the ground upon returning to Earth? c.) What is its rate of acceleration as it slows

asked by Heidi on November 12, 2010

What countries were members of the central powers in WW1? A. Austria-Hungary, Germany, Turkey*** B. France, , Germany, Russia C. France, Great-Britain, Russia D. Great-Britain, United States, Turkey 2. What caused the U.S to enter WW1 after 3years of

asked by UNKNOWN on April 5, 2016
12. physics

a)find the charge to mass ratio for an electron accelerated through 600v in a magnetic field of strength 45mT where the speed of the electrons is 1.4*10^7m/s b)what is the percentage difference b/n your result and the accepted ratio with the value

asked by ruth on March 10, 2016
13. Physics

A person walks 23.0° north of east for 2.60 km. How far due north and how far due east would she have to walk to arrive at the same location?

asked by Ashley on September 14, 2011
14. Physics

A person walks 15.0° north of east for 3.70 km. How far due north and how far due east would she have to walk to arrive at the same location?

asked by Imani on September 27, 2011
15. physics

A person walks 11.0° north of east for 3.30 km. How far due north and how far due east would she have to walk to arrive at the same location?

asked by Anonymous on September 26, 2011
16. physics

An object has a velocity of 5.00 m/s at an angle of 30.0˚ north of east. If we define east as the +x direction and north as the +y direction, what is the magnitude of vy?

asked by alexis on February 17, 2015
17. Science

A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

asked by Sherri on January 21, 2016
18. physics

How is the angle of inclination of the sun measured on the vernal or autumnal equinox at noon related to the latitude of our location here on earth. Use a picture that includes the earth and the sun in your explanation. I'm completly lost

asked by God Help Me on November 13, 2008
19. geology

What is the minimum age of Earth. We are given a hint of: If the age of Earth were equal to one calendar year, the 1492 arrival of Christopher Columbus in America would have occurred at five seconds to midnight Dec. 31. That confuses me even more.

asked by m on November 22, 2010
20. Physics

An object of mass 3.5x1023kg circles the earth and is attracted to it with a force whose magnitude is given be GMeM/r^2. If the period of rotation is 22 days, what is the distance from the earth to the object? Here G=6.67x10-11 Nm2/kg2, Me=6x1024 kg.

asked by Charlie on April 5, 2008
21. Maths

If a plane travels halfway round the world at an altitude of 11300m, what extra distance in km, will it fly compared with the distance measured at the surface of the Earth? The radius of the earth is approximately 6400km

asked by Anonymous on February 27, 2014
22. physics

A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height,

asked by Tina on January 25, 2011
23. Physics

You are on a treasure hunt and your map says "Walk due west for 52 paces, then walk 29.6° north of west for 40 paces, and finally walk due north for 25 paces." What is the magnitude of the component of your displacement in the following directions? (a)

asked by Taylor on October 5, 2011
24. physics

Evidence suggests that there are trillions of dollars' worth of minerals and metals buried in Near Earth Asteroids (the ones that come close to the Earth, not the ones in the asteroid belt between Mars and Jupiter). Many scientists think an asteroid mining

asked by Jeff on March 18, 2010
25. Physics

A duck has a mass of 2.3 kg. As the duck paddles, a force of 0.08 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.21 N in a direction of 55° south of east. When these forces begin to act, the velocity of the

asked by Niveen on October 12, 2010
26. math

Carrie and Krystal are taking a road trip from Greenville to North Valley . Each person has her own map,and the scales on the map are different. A.On Carrie's map, Greenville and North Valley are 4.5 inches apart.The scale on her map is 1 inch=20 miles.

asked by Anonymous on January 6, 2015
27. Physics

I know how to do displacement, I just get confused by the directions. I walk 6 blocks east and 5 blocks north-I come up with 7.8 because I squared 6 + squared 5 and took the square root of 61 but do I say the final displacement is 7.8 blocks east of north

asked by Tina on January 5, 2011
28. physics

Equivalent forces derivation problem. EXAMPLE: Derive the formula for F3 in terms of the experimentally measured quantities m1, m2, 1, and 2. [Answer: F3=m1gcos1+m2gcos2.] Make sure you understand how this formula was derived. QUESTION: If the mass of both

asked by Judy on February 1, 2010
29. Physics

Neglect the gravity of the Moon, neglect atmospheric friction, and neglect the rotational velocity of the Earth in the following problem. A long time ago, Jules Verne, in his book From Earth to the Moon (1865), suggested sending an expedition to the Moon

asked by Tarbela Damme on November 15, 2012
30. Geography

Where on Earth? You work for a company that specializes in environmental cleanup. Your company has been approached by representatives of several Eastern European governments. They want to clean up the Danube River and are asking companies in the United

asked by y912f on March 30, 2010

Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*

asked by Sarah on January 8, 2014
32. physics

Calculate the force of gravity on a 1 kg mass at Earth's surface. The mass of Earth is 6.0×10^24 kg , and its radius is 6.4×10^6 m.

asked by jim on March 6, 2012
33. science

As the moon revolves around the Earth, it also rotates on its axis. Why is it that the the same side of the moon is always visible from Earth?

asked by Lakshmi on November 22, 2015
34. SCIENCE

AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE

asked by DEEPAK on December 9, 2012
35. Physics

Why is more fuel required for spacecraft to travel from the earth to the moon than to return from the moon to the earth?

asked by Stuck on November 6, 2016
36. science

the radius of planet x is twice that of the earth and its mass is also twice that of the earth. The gravitational acceleration on planet x would be approximatley?

asked by thabo on February 14, 2016
37. physics

gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?

asked by Ayesha on February 19, 2008
38. Physics

At what altitude above the Earth's surface would your weight be three-fourths of what it is at the Earth's surface? Assume re = 6.371 10^3 km.

asked by Amanda on October 3, 2009
39. physics

A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s^2. a)What is its speed when it is very far away from the earth?

asked by kelly on December 1, 2009
40. science

if i weigh 100 lbs on earth and i went to another planet whose gravity is 15 times that of the earth, how much would i weigh

asked by lisa on May 7, 2010
41. Physics

Calculate the force of gravity on a 2 kg mass at Earth’s surface. The mass of Earth is 6 * 10 ^24 kg, and its raidus is 6.4 * 10 ^ 6.

asked by Amanda on January 14, 2012
42. science

If your weight is 60 N on earths surface how far should you go from the centre of earth so that your weight will be 300 N ?(radius of earth is 4.4*10^6 m)

asked by monika on March 18, 2013
43. Algebra 1

There is three times as much water as land on Earth's surface. What percent of earth is covered by water?

asked by Isabella on June 26, 2011
44. Science

Suppose the moon rotated on its axis just as quickly as earth. Would you still see the same side of the moon from earth? Please help!

asked by Amanda on November 30, 2015
45. Science

occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth.

asked by Muffee on October 27, 2014
46. physics

an object weighs 3 lb. at 10 earth radii from its center. What is the object's weight on the earth's surface?

asked by Leo on June 17, 2012
47. earth

At what height above the earth surface will an austranouts experience only half the gravitation that he experience on earth

asked by nonkululeko solomons on February 7, 2012
48. physics

could you estimate the mass of the entire earth? How? If we cannot direct measure the earth's mass, how was it determined?

asked by sue on September 7, 2011
49. PHYSICS

does the sun exert a gravitational force on the earth? if so, why doesn't the earth fall into the sun?

asked by Katie on December 22, 2010
50. English

Do you capitalize north as in "The North?"

asked by Jia on October 26, 2009
51. Science

If a ball A moves at X speed eastwards collideds with a stationary ball B. Ball A now moves at Y speed north east (40 degrees upwards from eastward direction) and ball B moves at W speed south east (50 degrees downwards from eastward direction). To

asked by Loli on May 2, 2016
52. Science

If a ball A moves at X speed eastwards collideds with a stationary ball B. Ball A now moves at Y speed north east (40 degrees upwards from eastward direction) and ball B moves at W speed south east (50 degrees downwards from eastward direction). To

asked by Loli on May 3, 2016
53. science

Discuss how comets might have a role to play in life evolving on an earth-like extrasolar planet in a distant solar system. can some one please help me out here. If life came to Earth via a comet, wouldn't it make sense to predict that some comet could

asked by kat on May 18, 2007
54. History

Select two groups of Native American people from two different areas within the United States. The area you can select from include the North, West, Southwest, Plains, and East/Southeast. Explain how environmental factors influence their homes and food. I

asked by Victoria on October 21, 2015
55. Physics-ASAP

A plane has an airspeed of 200 {mph}. The pilot wishes to reach a destination 600 {mi} due east, but a wind is blowing at 50 {mph} in the direction 30 degrees north of east. a)In what direction must the pilot head the plane in order to reach her

asked by Fizza on September 28, 2011
56. history

Winston churchill described soviet control of eastern europe as an "iron curtain" dividing the continent. what did the iron curtain come to symbolize? 1. the division of europe into north and south blocs 2. a growing fear of economic collapse that was

asked by Ciara's Sister on December 16, 2011
57. 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
58. 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? Is A the correct answer? a) That there is no reaction force-the net force on the

asked by ronnie on November 23, 2009
59. 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
60. Physics

An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 43 steps at an angle 45north of east, then 80 steps at an angle 60 north of west, then 51 steps due south. Assume his steps all have equal length. Save him from becoming

asked by Allison on April 7, 2011
61. trig

Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)(If someone had helped

asked by Parker on October 17, 2011
62. science help pls pls

The table below shows the average distances of Jupiter and Earth from the sun. Name of Planet Average distance from the sun (in AU) Jupiter 5.2 Earth 1.0 What is the difference between the orbital periods of Jupiter and Earth? 4.20 years 6.20 years 8.86

asked by Oscar on September 1, 2016
63. science

Please help me out! 8. Which of the following motions causes day and night? The sun's movements in the sky Earth's revolution around the sun Earth's movements in space Earth's rotation on its axis**** 10. Why can you never see the far side of the moon from

asked by Three Days Grace on November 15, 2018
64. chemistry (doubt)

We know that all matter are made up of atoms and all atoms consists of electrons ,protons, neutrons ,etc.Then why do we find such a variety of matter?Why is wood not gold?

asked by ... on August 5, 2011
65. chemistry

We know that all matter are made up of atoms and all atoms consists of electrons,protons,neutrons,etc.Then why do we find such a variety of matter?Why is wood not gold?

asked by ........................... on July 29, 2011
66. earth

The weight (V) of an object on Venus varies directly as its weight (E) on Earth. A person weighing 120 lb on Earth would weigh 106 lb on Venus. How much would a person weighing 180 lb on Earth weigh on Venus?

asked by Anonymous on September 5, 2012
67. chem--electrochemistry

So in this reaction: Ag(s) + Fe(+3) --> Ag(+) + Fe(+2) we are given 20 grams of Ag(s) to start off with. How do we find how many electrons are transfered in the reaction. And how many grams of Fe(+2) is formed. *for the latter, i think that we can

asked by Rav on March 28, 2010
68. chemistry

Hi, Is the molecular formula different when it is in a gaseous state? Cheers ;) Sometimes yes, sometimes no. H2O, for example, is thought to be in a group of 6 as a liquid at room temprature, a group of 4 at higher temperatures, and single H2O molecules as

asked by bertie on February 6, 2007
69. Physics

Oasis B is a distance d = 7.0 km east of oasis A, along the x axis shown in the figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 22 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 34

asked by Robin on February 9, 2014
70. physical

Oasis B is a distance d = 8.0 km east of oasis A, along the x axis shown in the figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 21 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 30

asked by Anonymous on October 13, 2012
71. Physics

A 1500-kg blue car is travelling south, and a 2000-kg red sports car is travelling west. If the momentum of the system consisting of the two cars is 8000kg.m/s directed at 60 degrees west of south, what is the speed of each car?

asked by Reynaldo on March 3, 2015
72. Physics

A bee flies to a flower 549 m due south of its hive. The bee’s speed in still air is 0.58 m/s, and there is a wind blowing toward the south at 0.18 m/s. How long will it take the bee to travel to the flower and back to the hive? Answer in units of s

asked by dallas on February 6, 2013
73. physics

A bee flies to a flower 583 m due south of its hive. The bee’s speed in still air is 0.68 m/s, and there is a wind blowing toward the south at 0.16 m/s. How long will it take the bee to travel to the flower and back to the hive? Answer in units of s

asked by bill on November 18, 2014
74. physics

In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.80 m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.6 m/s and is moving in a direction of 32.5 degrees east of north, relative

asked by bobjahng on November 2, 2010
75. 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 e

asked by ant on August 17, 2010
76. Earth Science

1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology

asked by Emma on January 13, 2013
77. Math/calculus

Earth orbits the sun at an average distance of about 150 million kilometres every 365.2564 mean solar days, or one sidereal year. What is the linear velocity of th3 Earth in kilometres per hour?

asked by Jessica on November 13, 2017
78. Earth Science

1. What are one internal and one external source of energy in the Earth system? 2. Earth scientists assume that the causes of natural events of phenomena can be discovered through... 3. Science constantly creates new technology. Does this new technology

asked by Emma on January 12, 2013
79. Electromagnetic spectrum

Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?

asked by Anonymous on February 26, 2013
80. Chemistry

Can you help me with solving this? I don't just want the answer,but how to do it. The average distance between Mars and Earth is about 1.3 108 miles. How long would it take TV pictures transmitted from the Viking space vehicle on Mars' surface to reach

asked by Alex on April 11, 2011
81. SCIENCE

1. An environmental engineer might (1 point) Create mathematical models of what may happen to global temperatures in the future. Build and maintain a marine exhibit for an aquarium. Help an oil finery reduce its toxic gas emissions.*** Stock a lake with

asked by SkatingDJ on January 19, 2015
82. Physics

Electrons in a narrow beam travelling at a steady speed of 5 x 10^7 ms^-1 are directed into the space between two oppositely charged parallel plates 50mm apart. The potential difference between the plates is 2500V. The initial direction of the beam is

asked by Ben on February 17, 2016
83. homework

Which of the following would cause the greatest decrease in gravitational force between the earth and the moon? an increase in the earth's mass an increase in the moon's mass an increase in the distance between the earth and the moon a decrease in the

asked by Anonymous on November 3, 2013
84. science

Which of the following would cause the greatest decrease in gravitational force between the earth and the moon? an increase in the earth's mass an increase in the moon's mass an increase in the distance between the earth and the moon a decrease in the

asked by savana on April 11, 2017
85. Social Studies

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

asked by Jasmin on January 8, 2017
86. History :)

Can someone help with this one please? Select one reform movement from the Progressive Era. Describe the movement and its impact on South Carolina. Provide details and examples that support how this movement changed South Carolina. Websites and examples

asked by Martin on April 3, 2015
87. history

n President James Monroe's annual address to Congress in 1823, he outlined his foreign policy. This policy has become known as the Monroe Doctrine. What was the main point of the Monroe Doctrine? A. The United States would prevent future European

asked by Anonymous on February 11, 2016
88. Physics

A pedestrian moves 5.7 kmeast and then 8 km north. Find the magnitude of the resultant dis- placement vector. Answer in units of km

asked by Crystal on September 30, 2012
89. physics

from point A, a boy walks 4 m to the east,2 m to the sout, 4 m to the west , and finally, 2 m to the north , find the distance he travelled and his displacement

asked by same on August 21, 2014
90. science

Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth

asked by ally on September 23, 2017
91. science

Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth

asked by ally on September 22, 2017
92. physics hey damon one more please! =]

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 Jon on January 14, 2008
93. 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 Courtney hey damon can i get the quadratic on this on January 9, 2008
94. Astronomy

In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral line is found to have a wavelength of 410 nanometers. What can be said about the star? a. It is hotter than the Sun. b. It is

asked by Xenon on February 15, 2018

A rocket ship is moving away from the earth after having been fired from a launch pad in Florida. At what point above the earth's surface will the force of gravity be reduced to ½ of its original value? ------------------ Prior to this question I was

asked by Ian on January 13, 2015
96. Social Studies

1) The South is an excellent place to grow such crops as cotton, rice, tobacco, and sugar cane. Which of the following is NOT part of the South's excellent farming conditions? a. The warm climate is suitable for agriculture. b. There are no bugs. c. The

asked by Dianna on March 11, 2013
97. Physics

When land ice on Antarctica melts and flows into the sea, eventually it circulates and therefore distributes uniformly over the earth's oceans. As a result, does the earth's rotational speed increase, decrease or remain unaffected? (If it does have an

asked by Bill on October 26, 2009
98. physics!!!!

A spaceship passes Earth at a speed such that γ = 112. A creature aboard the vessel does the Mongoian greeting dance that takes it 21 s (on its clock -- bought on a previous visit -- which is why it reads in seconds) to perform. How long will the

asked by Jordan on November 30, 2009
99. physics

The radius of the Earth is approximately 6000 km. The acceleration of an astronaut in a perfectly circular orbit 300 km above the Earth would be most nearly. For this question I simply guessed. I knew "a" was 9.8 on the surface, and my answers were 0,

asked by Hannah on January 20, 2008
100. i really need help with science pls help

The Hawaiian Islands are examples of islands that formed over a hotspot. Based on this information, which of the following processes formed the Hawaiian Islands? Melted rock called magma rose through holes in Earth's crust and gradually solidified as it

asked by Oscar on April 15, 2016