# 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 50
1. ## Physics

The space shuttle releases a satellite into a circular orbit 440 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

asked by Tatiana on October 11, 2010
2. ## physics

The Hubble Space Telescope orbits Earth 621 km above Earth's surface. What is the period of the telescope's orbit? Give answer with 5 significant figures.

asked by Katie on October 3, 2012
3. ## PHYSICS ---HELP!

The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

asked by lauren on October 11, 2010
4. ## Physics

I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than

asked by Taylor on September 8, 2013
5. ## Physics

I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than

asked by Taylor on September 8, 2013
6. ## Physics

The height of the sun from point A is larger than from point B by 4.92 degree.If the distance between A and B is 500 Km, How long is the circumference of the earth? ( assume that earth is perfect sphere)

asked by anzar on October 3, 2014
7. ## Physics

The diameter of the Moon is 3.78x10^6m. It subtends an angle of .00982 radians at the surface of Earth. How far is the Moon from Earth? (Please explain I can't wrap my head around this question.)

asked by Harry on November 13, 2014
8. ## college physics

The space shuttle releases a satellite into a circular orbit 550 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

asked by Anonymous on February 22, 2010
9. ## space

Stars near the ______ should show the greatest Doppler shifts due to the earth's revolution. Why? Would it be stars near the ecliptic because it deals with the earth revolving and having motion.

asked by Anonymous on October 25, 2010
10. ## physics

The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs? V = m/s ??

asked by angela on October 11, 2010
11. ## Chemistry 2

What is the predominant intermolecular force responsible for the dissolution of the hydrophilic end of soap in water? Using dashed lines, illustrate where the intermolecular force occurs between atoms in adjacent molecules? Lone pair electrons have been

asked by Angela on June 30, 2013
12. ## Expected Value? Help

Kyd and North are playing a game. Kyd selects one card from a standard 52-card deck. If Kyd selects a face card (Jack, Queen, or King), North pays him \$4. If Kyd selects any other type of card, he pays North \$3. a) What is Kyd's expected value for this

asked by tatiana on September 25, 2016
13. ## Physics

Suppose you wish to visit a star which is 450 light years away, and that you want your 21000 kg rocket to move so fast that you only age 20 years during the round trip. a. How fast must the rocket travel relative to the Earth? Give your answer as the

asked by Darren on May 5, 2011
14. ## history

Drag the words to the boxes in the sentences. Burmese Khmer porcelain reservoirs Indonesia Mekong By the ninth century, the empire had emerged in eastern Indochina. It developed around agriculture and used to store water. To the south, the Srivijaya empire

asked by Austin on November 14, 2018
15. ## Physics

A -10 mC charge experiences a force of 75 N directed south. What is the electric field magnitude and direction at the location of the charge? If this charge is removed and not replaced, what is the electric field magnitude and direction at the location it

asked by Alaine' on May 5, 2012
16. ## Math

The approximate distance of the moon from Earth is 4 x 105 km and the average approximate distance from the Earth to Venus is 4 x 107 km. How much farther is Venus from Earth than the moon?

asked by Lucy on December 8, 2016
17. ## Math

an object’s weight on a planet is directly proportional to the mass of that planet and inversely proportional to the square of the radius of the planet. jupiter is 318 times as massive as Earth and has a radius 11 times as large as that of Earth. if

asked by DK on October 14, 2017
18. ## physics

The MASS OF A SATELLITE IS 2000Kg .DETERMINE THE WEIGHT OF OF THE THE SATELLITE WHEN IT IS (i)resting on the earth (ii) 1000km above earth surface

asked by fanuel on March 10, 2010
19. ## physics

a 70 kg block rests on the earth's surface. How much energy is required to move the block very far from the earth, ending up at rest again?

asked by paul on March 22, 2015

What makes the moon rise? a)Alignment of the stars 2) Earth's rotation 3) Moon orbits about the Earth Is the answer (2)?

asked by Chimingbell on November 13, 2016
21. ## physics

Calculate the force of gravity on a 16 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.

22. ## physics

with what velocity must a body be thrown from earth surface so that it may reach a height 4Re the earth surface. given Re=6400km g=9.8m/s

asked by kavya on February 2, 2017
23. ## physics

somewhere between earth and the moon gravity from these two bodies on a space pod would cancel. Is this location nearer to earth or the moon?

asked by elisia on April 5, 2010
24. ## physics

A satellite orbits Earth once per day. From the reference frame of the Moon, which orbits Earth once about every 27 days, what is its motion?

asked by karen on October 14, 2011
25. ## Chemistry

the distance from the sun to earth is 1.496 x10 ^8 km. how long does it take light to travel from the sun to earth How do you solve this?

asked by Mark on October 25, 2015
26. ## Math

The speed of light is 3x10^8 m/s. If the sun is 1.5 x10^11 meters from the earth, how many seconds does it take light to reach the earth?

asked by Emma on March 22, 2017
27. ## physics

An object is projected from the surface of the earth with a speed of 2.73x10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance).

asked by Kristen on March 24, 2015
28. ## phy

A 2000 kg satellite orbits the earth at a height of 300 km. What is the speed of the satellite and its period? Take , Mass of the earth is kg

asked by squ on September 14, 2014
29. ## physics

asked by Beth on October 8, 2016
30. ## physics

Imagine a planet that orbited the sun at a distance three times that of Earth. What would the period of that planet be in Earth years?

asked by becky on March 1, 2012
31. ## science

how do the fluxes of radiation help explain why air temperature near the earth's surface is higher than it is 2km above the earth's surface

asked by cary on October 12, 2010
32. ## physical science

when an astronaut orbits the earth, and is falling in a circle around the Earth, is he/it creating a CENTRIFUGAL force or a CENTRIPETAL force?

asked by anonymous on December 31, 2010
33. ## physics

prove that the moon complete its one revolution around the earth in (27.3) days.distance of moon from the surface of the earth is (380000km).

asked by TUBA GULL on December 13, 2014
34. ## PHYSICS

An object weighs 480 N on earth. what would its weight be on a planet whose mass is twice the mass and half the ratio of the earth?

asked by Princess Blabla on September 12, 2015
35. ## physis

Search: 2. Explain how radioactive decay has always warmed the Earth from the inside, and nuclear fusion has always warmed Earth from the outside.

asked by barbara on January 26, 2014
36. ## Physics

The force of gravity on the moon is said to be 1/6th of that on the earth .what would be the mass of 12kg weighed on the surface of the earth and moon

asked by Bhumika Gireesh on July 18, 2012
37. ## Physics

A man has a mass of 80kg on the Earth's surface. Part A How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?

asked by Joe on September 26, 2013
38. ## science

how many times the earth travels around the earth?

asked by queeneka on March 22, 2009
39. ## earth science

compared to earth, earth jupiter

asked by Anonymous on February 20, 2011
40. ## Social Studies

4. Which of the following would describe a reason the British government planned to take the South in the Revolutionary War? A. The British people were tired of the war's expenses. B. They believed the Indians would join forces with them against the

asked by Amber on October 27, 2015
41. ## cpcc

a small plane is traveling due south a t a velocity of 90 m/s. It suddenly encounters a tailwind of 27 m/s heading due south. what is The "air velocity" of the plan stays the same....but what is the resultant velocity (aka..."ground velocity") of the

asked by sylvia on June 5, 2017
42. ## physAH!

A car that is initially at rest moves along a circular path with a constant tangential acceleration component of 2.07 m/s2. The circular path has a radius of 42.4 m. The initial position of the car is at the far west location on the circle and the initial

asked by opp on February 20, 2012
43. ## Social Studies

Which is the most likely way in which anti-poverty nongovernmental organizations (NGOs) like Oxfam could help South America to address political challenges? A. Poor people helped by Oxfam might fight corruption. B. Poor people helped by Oxfam might support

asked by dori on December 29, 2018
44. ## Humanities

Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and

asked by Justin on December 6, 2015
45. ## Math

From a part Z 60m north of X a man walk eastward to another point Y, 120m from X find the bearing of Y and X.

asked by Biola on May 28, 2018
46. ## Science

Why are the days typically hotter in June than in December here in the US? A.Beacuse the sun gives off more light and heat in the summer B.Because the Earth is closer to the sun in the summer and farther from the sun in the winter C.because the Earth's

asked by M on February 11, 2015
47. ## History

Which best describes the languages spoken by American Indians in South Carolina? All tribes in South Carolina spoke the same language Most American Indians spoke Algonquian or Siouan. American Indians spoke more than fifty languages Most tribes spoke of

asked by Loomin on September 12, 2018
48. ## physics

A wind is blowing directly from east to west. The pilot of a small plane finds that if he points the nose of the plane 30.0 ° north of east, his velocity with respect to the ground is in the direction 55.1 ° north of east. The speed of the plane with

asked by Anonymous on October 21, 2012
49. ## physics

two ropes are attached to a 200. kg sled. A 490. newton dog attached to on eo the ropes applies a force of 300. N b north of the rope. A 35.0 kg dog attached to the second rope applies a force of 125 N b 36.9 degrees south of west to the rope. Calculate

asked by Alex on September 17, 2010
50. ## physics

the 900 kg car was traveling south and collided with the 2000kg car traveling west. they both got tangled and moved away from the impact point as one mass at 16.0m/s in the direction 24degrees west of south. what was the initial speed of each prior to the

asked by kristen on August 11, 2014
51. ## Geology

The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

asked by Pete on December 16, 2014
52. ## Physics

Calculate the force on an electron (qe = -1.6 x 10^-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10^-6 m from a proton c.) in Earth's gravitational field at the

asked by Bill on May 31, 2012
53. ## physics

A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.

asked by D on October 3, 2012
54. ## Earth's Heat Resources

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

asked by Sydney on December 7, 2010
55. ## Earth's Heat Resources

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

asked by Sydney on December 8, 2010
56. ## Geography.../what does this mean?

" The earth's physical landscape is the result of conflict between forces..." Explain what this means. Thanks. Is it possible that forces move Earth around, sometimes the movement is opposing another landforce, they collide, and one slide under?

asked by Liza on April 3, 2007
57. ## math

On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second?

asked by kay on August 20, 2017
58. ## overland high school

the gravitional force exerted on objects on the moon is about 1/6 that of earth. if an object weighs 240 newtons on the moon, on earth it would weigh _________.show work

asked by danial on March 2, 2011
59. ## physics

An Earth satellite moves in a circular orbit 824 km above Earth's surface with a period of 101.2 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?

asked by Pat Rick on September 2, 2011
60. ## Physics

Calculate the force on an electron (qe = -1.6 x 10-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10-6 m from a proton c.) in Earth's gravitational field at the surface

asked by Bill on May 31, 2012

A boat heads 15 degrees west of north with a water speed of 3m/s. Determine its velocity relative to the ground when there is a 2m/s current from 40 degrees east of north. How long does it take to cross the river which is 800 m wide? Where does the boat

asked by Ariza on May 11, 2010
62. ## physics

While flying due east at 130 km/h, an airplane is also carried northward at 41 km/h by the wind blowing due north. What is the plane's resultant velocity? (Draw vector diagram to solve problem.) Magnitude km/hDirection (north of east) 72° 18° 18° 72°

asked by Eddie on October 4, 2011
63. ## Atmospheric Science

Estimate the rate of freshwater mass production (kg s-1) b the melting of the North American ice sheet, assuming its melting took 500 years. How does this compare with the rate of deep-water formation in the North Atlantic, which is estimated to be about 2

asked by Donna on November 20, 2009
64. ## modern physics

The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

asked by gourav on March 19, 2017
65. ## modern physics

The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

asked by gourav on March 21, 2017
66. ## Physics

The Earth is about 81 times more massive than the moon. During the gravitational interation of the Earth and the Moon, the magnitude of the gravitational force acting on the Earth _______ the gravitational force acting on the Moon. A) is greater than B) is

asked by Anonymous on September 18, 2016
67. ## Conceptual Physics

If an airplane travels 250 km due north in 1/2 hour, what is its velocity? 500 km / hr 500 km / hr north 250 km / hr I think the answer is b?

asked by Angie on September 18, 2018
68. ## precal

chie left home and ran north for 20 minutes at 10 km/h and then turned north east for 35 minutes at 5 km/h. how far (km) was she away from home after the run?

asked by vanessa on October 29, 2015
69. ## math

chie left home and ran north for 20 minutes at 10 km/h and then turned north east for 35 minutes at 5 km/h. how far (km) was she away from home after the run?

asked by vanessa on October 29, 2015
70. ## socials 9

So far as we know, the Vikings stopped visiting North America in the eleventh century. Imagine you belong to a small viking community which was left behind by the last ships. Write part of a Sega describing your experiences in North America. Give your saga

71. ## Physics

According to Anna, on Earth, Bob is on a spaceship moving at 0.8c towards Earth, and Carl, a little farther out, is on a spaceship moving a 0.9c towards Earth. According to Bob, how fast is Carl moving relative to Earth? (a) According to Bob, how fast and

asked by Katie on February 4, 2013
72. ## social studies

1. Place the events in early South American history in correct chronological. Place the earliest event at the top and the last event at the bottom. South Americans began to domesticate plants. The Tiahuanaco empire expanded. The Norte Chico civilization

asked by jazzy on December 18, 2018
73. ## science

which is an example of covalent bond? a.chlorine accepts an electron from calcium b. lons in a bar of pure iron are surrounded by a large number of valence electrons c.sodium gives an electron to chlorine to form a stable bond d.there are less than 16

asked by bri;) on May 3, 2017
74. ## trig

A hiker walks 900m east and 500m south .Find the bearing of the finishing position from the staring point?

asked by x on May 25, 2013
75. ## geography

how have farmers in the poor part of south italy been helped with their living conditions. ive looked but cant find anything. thankyou

asked by Vioklia on March 21, 2010
76. ## maths help!

find the mass of the earth assuming the radius is 6400km

asked by newton on April 3, 2016
77. ## Physics

Find the gravitational force between the sun and the earth in newtons?

asked by Charles on February 11, 2008
78. ## algebra 2

You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.1. the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from

asked by linda on November 12, 2009
79. ## Physics-Totally lost

I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located at its center. How would the gravatational force and electrical force

asked by Rafaela on April 7, 2011
80. ## scocial studies

1. Why is it incorrect to say that the Ozarks are mountains? A.They are too small to be mountains. They are hills B.They are generally covered with trees. They are forests. C.They are flat on the top with valleys eroded away. They are plateaus D.They are

asked by nobody on January 25, 2017
81. ## Physics

7. An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that people would be thrown into space. Show the error in this logic by calculating the centripetal force needed to hold a 100. kg

asked by Brian on February 2, 2015
82. ## Third Side, Reply to Jen

Hi Jen, I've seen the drawing. My site is down at the moment. Draw a line from Venus (either of the two positions) to the line Earth-Sun at right angles. Let's call the distance Earth Venus d. Then you have a right angle triangle with a hypotenuse d, the

asked by Count Iblis on November 11, 2006
83. ## Geography

My question is Why is Milan cooler than Palermo although Milan is in the North and Palermo is in the south of Italy Does rain fall got to do with it cause Milan has the most rain fall Milan:

asked by QER on May 15, 2007
84. ## physics force

A positively charged rod is held near, but not touching, a neutral metal sphere. does the sphere experience a net force? if so, what direction/ I think the sphere has a net force to the left because since the sphere is neutral, it will have same number of

asked by Anonymous on August 17, 2009
85. ## maths

a hiker walk due east at 4km per hour and a second hiker starting from the same point walks 55 degree north-east at the rate of 6km per hour. H ow far apart will they be after 2 hours. this is my ques but .i am having problem that if the hiker walks 55

asked by annny on February 17, 2013

At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east. a. Write a function for the distance between the two ships. b. At what time are the two ships closest?

asked by Maria on November 21, 2011
87. ## Calculuss--Optimization

At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east. a. Write a function for the distance between the two ships. b. At what time are the two ships closest?

asked by Maria on November 21, 2011
88. ## SCIENCE HELP PLS

The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of

asked by Oscar on January 15, 2016
89. ## AP Physics (circular motion)

The moon revolves about the Earth in a trajectory that is very nearly a circle of radius r = 384,401 km, and requires 27.3 days (23.4 x 10^5 seconds) to make a complete revolution. What is the acceleration of the moon toward the Earth?

asked by perry on September 24, 2009
90. ## science

the phenomena of parallelism of axis? a- results in the production of day and night b- causes different hemispheres of the earth to tilt toward the sun c- determines the angle at which the sun's rays will strike the earth d- all of the above

asked by latasha on March 2, 2011
91. ## earth

a satellite orbits the earth in circular orbit 620 km above the suface. if the radius of the earth is 6380 km, calculate, to 3 significanf figures, the distance travelled in a single orbit?

asked by mike on October 20, 2011
92. ## Physics

An asteroid with mass m = 1.85*10^9 kg comes from deep space, effectively from infinity, and falls toward Earth. How much work would have to be done on the asteroid by friction to slow it to 550 m/s by the time it reached a distance of 1.50*10^8 m from

asked by Kaitlyn on October 16, 2012
93. ## Physics

The international space center is 1500km above the earth surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6.0*10^-24kg and the radius is 6.4*10^6 m.

asked by Bill on May 27, 2018
94. ## geology

When astronauts brought back rock samples from the Moon, the minerals present were mostly the same as those found on Earth. Can you think of reasons why this might be so? Would you expect minerals on Mars or Venus to be the same, or at least very similar,

asked by nikki on May 25, 2011
95. ## Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

asked by Alex on October 1, 2010
96. ## College Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

asked by Nicole on September 28, 2010
97. ## calculus

Write the standard form of the equation for the path of a communications satellite in a circular orbit 22,000 miles above Earth. (Assume that the radius of Earth is 4000 miles.)

asked by Anh on February 2, 2011
98. ## Physics

the acceleration due to gravity on the moon is 1/6 that on earth. For a projectile with an initial velocity of 15m/s upward what would be the maximum height and total time of flight on the moon and on the earth?

asked by Angie on September 18, 2014
99. ## Science

On the main sequence, what type will have life spans of about ten billion years? I took Earth Science last year so although I do not have them in front of me, I believe the are in the Earth Science Reference Tables (ESRT).

asked by Liz on January 2, 2007
100. ## Physics

How would the speed of Earth’s orbit around the sun change if Earth’s distance from the sun increased by 4 times?

asked by Faith on January 13, 2011