# Two electrons are placed; one at north pole and other at south pole of earth. Find the force between them. Given diameter of earth= 12800 km.

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1.how was the suit the catawba brought against south carolina and the federal government resolved? a. the catawba received their ancestral burial grounds b.the catawba received the land on which the city of rock hill stands c. the cataba received a large
2. ## physic

Three vectors are shown in the figure below, but they are not drawn to scale. The sum of the three vectors is R = F1 + F2 + F3. If Ry = 0 and F2 = 0.2F3, find Rx in terms of F1. the Answer Keyis 0.327.can somebody show me how to get to the answer key. I
3. ## Physics...Help!!!

given that Earth's surface gravitaitional field strength has a magnitude of 9.80N/kg, determine the distance(as a multiple of Earth's radius re) above the Earth's surface at which the magnitude of the field strength is 3.20N/kg.
4. ## Science

The sun's apparent motion across the sky from East to West daily is due to the A) rotation of the sun. B) rotation of the earth. C) orbit of the earth around the sun. D) orbit of the sun around the earth. I think the answer would be c.
5. ## Physics

The diameter of the Moon is 3480km. What is the volume of the Moon? How many Moons would be needed to create a volume equal to the Earth? How do you find the volume of the Moon from just the diameter? Also, does anybody know how to figure out the volume of
6. ## physics

An airplane is heading due south at a speed of 734 km/h . A wind begins blowing from the southwest at a speed of 110 km/h (average). In what direction should the pilot aim the plane so that it will fly due south?
7. ## science

1. If person weighs 176 lbs on earth what is his or her mass on mars where the force of gravity is 37% of that on earth. With Complete solution
8. ## earth

Deep within the earth, the process of mantle ___ drives plate tectonics. A) Condensation B) Subduction C) Currents D) Convection
9. ## physics

A bag of sugar weighs 6.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth?
10. ## Earth Science

2.   The Moon is made up of minerals similar to those on Earth, which are  A. rilles. B. lunar breccias. C. silicates. D. highlands. I am thinking either B or D?
11. ## Social Impact of Technology

Which of these planets is in the so-called “Goldilocks Zone”? A. Earth B. Mars C. Jupiter D. Venus Ans: Earth
12. ## Physics

How far from the center of the earth must a satellite be placed so that the acceleration due to gravity is half the value at the surface? (Hint: the diameter of the earth is 1.3x107 m.)
13. ## physics

If the radius of the Earth somehow bloated to twice its size, with no changes in mass, your weight at the Earth's new surface would be ___A) one-quarter.B) one eighth.C) the same.D) twice.E) half.
14. ## science

If an object weights 40 N on the Earth, it would weigh only 10 N when its distance from the center of the earth doubles, halves, triples or quadruples??? How do I figure this?
15. ## Earth Science to Ms.Sue

9.   Another name for unicellular organisms that dominated Earth up to the Precambrian time is  A. eukaryotes. B. cyanobacteria. C. stromatolites. D. prokaryotes. D?
16. ## physics

A loaf of bread weighs 3.9 N on earth. What should it weigh, in newtons, on the moon, where the acceleration due to gravity is one-sixth that on Earth?
17. ## Physical Science

The Earth moves in a nearly perfect circle around the Sun. Assume the speed stays constant. Is the Earth accelerating or not?
18. ## science

A meteorite weighs 300 Newtons on the moon. the moons force of gravity is 1/6 that of earth. what is the meeorites weight on earth?
19. ## earth science

what is the greatest danger from volcanoes?? a. watery lava b. mud flows c. oxygen d. bulging of the earth's crust
20. ## physics

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1000 kg. what equation would i use
21. ## Physics

The radius of the Earth is 6.38 x(10^6)m. How far (path length) does a point on the equator move if the Earth rotates... a. 20 degrees b. 20 radians c. 20 revolutions
22. ## Math, Physics

Calculate Earth's gravitational force on the ISS astronauts while orbiting at an altitude of 401.5 km above Earth’s surface.
23. ## physics

using 6400 km as the radius of earth, calculate how high above earth's surface you would have to be in order to weigh 1/16th of your current weight.
24. ## Physics

Calculate a space shuttle territory 250 km above Earth's surface. Earth's mass is 6.0 * 10^24kg and its radius is 6.38 * 10^6 m (6380km)
25. ## Physics

A bag of sugar weighs 6.70 lb on Earth. a) What would it weigh in newtons on the Moon, where the free-fall acceleration is one sixth that on Earth?
26. ## MATH

Earth, Jupiter, and Uranus all revolve around the sun. Earth takes 1 yr, Jupiter 12 yr, Saturn 30 yr, and Uranus 84 yr to make a complete revolution. One night, you look at those three distant planets and wonder how many years it will take before they have
27. ## Chemistry

A covalent bond forms when (1)two nuclei share electrons in order to achieve a complete octet of electrons (2) atoms form ions and then electrostatic forces of attraction bond the ions together. (3)repulsive forces between atoms are greater than the

29. ## Physics

When an item has been launched into orbit, what happens? 1: It continues to fall but its path never reaches the ground. 2: Centripetal force from Earth's gravity keeps it from being accelerated toward Earth. 3: It no longer falls because the weakness of
30. ## Astronomy

How can Google Earth be used to access the size of the Earth?
31. ## earth

How many minutes does it take for light from the sun to reach the earth?
32. ## earth

how Earth would be different today, if it contained no radioactive material
33. ## space

why cant petrol driven cars we use on earth be used on the earth?
34. ## Earth Science

Can someone five me an example of how carbon cycles through the Earth's system?
35. ## earth

what is the scientific explanation of the formation of earth's layers?
36. ## Earth Science

How energy flows through the Earth's system?
37. ## earth

If you had a mole of M&M's, how many times could you cover the surface of the earth ?
38. ## Science

On what sides does a "bulge" in the earth's oceans appear on the earth?
39. ## Earth Science

Explain the Earth's Cabon Cycle
40. ## Earth Science

How energy flows through the Earth's system.
41. ## SS

Earth’s oceans cover nearly ____ of Earth’s surface.
42. ## Math

4. Columbus had a hard time convincing anyone to undertake the expense of financing a voyage to an unknown place. Based on the information available from other sailors and partly on his own ideas, Columbus underestimated the circumference of the Earth by
43. ## social studies

Hi i need help with the following 4 questions please 1. Jacksonian democrats favored the following except one a. rotation in office b. manhood suffrage c. the caucus system of nomination d. rewarding the politically faithful 2. The foreign policy of John Q
44. ## Physics

a powerboat heads due northwest at 15 m/s relative to the water across a river that flows due north at 4.8m/s what is the velocity of the motorboat and angle due west of north
45. ## Physics

Assume that the earth is a uniform sphere and that its path around the sun is circular. a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is
46. ## physics

Assume that the earth is a uniform sphere and that its path around the sun is circular. (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year
47. ## physics

The earth is moving around the sun,now a satalite with its escape velocity thrown out from the earth,if the earth will stop then escape velocity of the satalite will same or not??
48. ## 6th grade - EARTH SCIENCE

What are three interesting facts about the upper mantle of the earth? and 3 interesting facts about the lower mantle of the earth?
49. ## EARTH SCIENCE

If the ages of Earth and the Moon are nearly identical, as believed, why are most of the rocks found on the Moon so much older than most of the rocks found on Earth?
50. ## Physics

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97×1024 kg, the Moon's mass is 7.4×1022 kg, and the distance between their centers is 3.8×108 m.
51. ## Physics

How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97e24 Kg, the Moon's mass is 7.4e22 Kg, and the distance between their centers is 3.8e8m.
52. ## physics

The mass of the Earth is 5.98x10^24 kg, and the mass of the Moon is 7.36x 10^22 kg. The distance of separation, measured between their centers, is 3.84x10^8 m. Locate the center of mass of the Earth-Moon system as measured from the center of the Earth. I
53. ## Math

The distance, "d", to the horizon (= farthest point on the earth still visible) for an object that is "h" miles above the surface of the earth is given the formula d = the square root of 8000h +h^2. Determine how many miles above the surface of the earth
54. ## Physics

A rocket starts from rest and moves upward from the surface of the earth. For the first 10s of its motion, the vertical acceleration of the rocket is given by a_y =( 2.70m/s^3)t, where the +y-direction is upward. 1) What is the height of the rocket above
55. ## History

To my knowledge the Arctic and Anarctic are the only places they haven't had major battles. What two continents have never been the site of a major military conflict? http://en.wikipedia.org/wiki/Continent Probably Antarctica and Australia. I'm just
56. ## physics

An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?
57. ## physics

An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?
58. ## physics

Two forces are applied to a tree stump to pull it out of the ground. Force A has a magnitude of 2880 newtons (N) and points 42.0 ° south of east, while force B has a magnitude of 4360 N and points due south. Using the component method, find the (a)
59. ## History

6. Which of the following Civil War era presidential orders directly impacted 13th Amendment A.homestead Act B.Wilmot Proviso C.Lecompton Constitution D.Emancipation Proclamation D? 7.Why did lincoln exclude west virginia from the effects of Emancipation
60. ## Mathematics

1. Which of the following is the correct definition of minerals? (1 point) a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition a naturally occurring, inorganic solid that forms through crystallization of
61. ## Physics

A 7450kg satellite has an elliptical orbit. The point on the orbit that is farthest from the earth is called the apogee. The point on the orbit that is closest to the earth is called perigee. Suppose that the speed of the satellite is 2940m/s at the apogee
62. ## HS Science

I have 4 questions 1 What is the equation for the acid ionization constant of HI? 2 Give the oxidation numbers of all atoms in NaMnO4 3 An atom changes its oxidation number from -2 to -5. Is it oxidized or reduced? How many electrons did it take to do
63. ## two dimensional kinematics

A jetliner with an airspeed of 1000 kmlhr sets out on a 1500 km flight due south. To maintain a southward direction, however, the plane must be pointed fifteen degrees west of south. Ifthe flight takes 1 00 min, what is the wind velocity?
64. ## Pre-Calc (Please my class starts in an hour!! :)

Can someone please help me with the following question. 1) The weight of an object above Earth can be modeled by a function of the form w(h)=(r/r+h)^2*"w , where r is the radius of Earth 0" (approximately 3950 miles)," h" is the distance above Earth's
65. ## Math

A plane flys 230 km due north. The wind is blowing west at 85 km. what direction is the plane flying. Calculate the actual speed of the plane. What is the hearing from North?
66. ## Math

A plane flys 230 km due north. The wind is blowing west at 85 km. what direction is the plane flying. Calculate the actual speed of the plane. What is the hearing from North?

Do these look right? What shape does an ammonia (NH3) molecule have?trigonal pyramidal In a tetrahedral molecule, how many unshared pairs of valence electrons does the central atom have? none In a polar bond, electrons are? completely transferred What

Assume the earth is a uniform sphere and that its path around the sun is curcular. Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the US in one year is about 9.33 x 10^9
69. ## physics

A 2,000-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 39.0° north of east and at a speed of 5.15 m/s. Find the speed of the 3,000-kg car before the
70. ## English

Which of the following italicized words is correctly capitalized? I think it is D. is that correct? Thanks or your help.. A. Mount mckinley is the tallest mountain in North America. B. The most beautiful State is Hawaii. C. Marsha speaks excellent german.
71. ## South America

What is the longitude and latitude of every piece of south America?
72. ## Math

It takes 5 1/3 minutes for light from the sun to reach earth. The Moon is closer to earth, so it,s light reaches earth faster about 5 19/60 minutes faster than from the sun. How long does light from the moon take to reach earth.
73. ## English

1. The second seed came out of the earth. 2. The second seed came out of the Earth. (Which one is correct? Do I have to use 'earth' or 'Earth'?) 3. I felt to get up early. 3-1. I felt getting up early. 3-2. I felt like getting up early. 3-3. I felt that I
74. ## physics

An electronic tracking device is placed on a police dog to monitor its whereabouts relative to the police station. At time t1 = 23 minutes, the dogs placement from the station is 1.2km, 33 degrees north of east. At time t2=57 minutes, the dog's
75. ## History

Can someone please help me? Thanks Select one way World War II changed the roles of women or blacks in the United States and South Carolina. Explain the change you selected. Provide examples of how these events changed South Carolina’s society.
76. ## Math

a small plane flies due south with a speed of 112 m/s while a tailwind blows due south at 31 m/s. Draw and label a vector diagram and calculate the magnitude and direction of the plane's resultant velocity
77. ## Life orientation

Identify one evironmental or human factor that causes ill health, accidents and disasters in south africa? *in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts in south africa.
78. ## Physics

I have two questions: How many hours of light and darkness are there in June at regions south of the Antartic Circle (dotted line in Southern Hemisphere)? Six months later, when the earth is at the December position, is the situation in the Antartic the
79. ## Physics

2. Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. Show your work. Answer: g= GM/r² G= 6.67 * 10^-11 Nm²/kg² ME= 5.98 * 10^24
80. ## repost chem

or the compound: carbon in the middle with 3 bonds -double bond to oxygen -bond to Mn(CO)5 -bond to CH3 group is the oxidation state of the metal +1? d count 6? total electron count 20? coordination number 7? D COUNT is electrons in the d orbital, and i
81. ## physics

A ship leaves the island of Guam and sails a distance 280 at an angle 39.0 north of west. 1.In which direction must it now head so that its resultant displacement will be 125 directly east of Guam? (Express your answer as an angle measured south of east)
82. ## Civic

Expalin how the relationship between the north American colonists and great britiain affected the development of the undderiyin priciples and idead in the decelaration of independence and new state constitutation in North american inn the eighteenth
83. ## gEoMeTrY iNsCrIbEd AnGlEs MuLtIpLe ChOiCe QuEsTiOn

A satellite, B, is 17,000 miles from the horizon of Earth. Earth’s radius is about 4,000 miles. Find the approximate distance the satellite is from the Earth’s surface. {The picture is a circle with point O in the center, point C is on the top center

Why does the octet rule not hold for many compounds containing elements in the third row of the periodic table and beyond? (Select all that apply.) 1. Atoms of elements in the third period are less subject to destabilization from additional
85. ## Math

A ship sailing west toward shore, and there are tow ports on the horizon. The ports are 17 miles apart, and from the ship's vantage point, point A is 30 deg North of straight ahead and port B is 80 deg South of straight ahead. Approximately how much
86. ## Physics

ohn and Jack are planning to do a physics lab related to vectors. Starting at the door of their physics classroom, they walk 2.0 meters, south. They make a right hand turn and walk 16.0 meters, west. They turn right again and walk 24.0 meters, north. They
87. ## math

The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and
88. ## Science

According to the continental drift theory, which of the following land regions should show the greatest similarities in fossil types? (1 point) A) east coast of South America and west coast of Africa B) east coast of South and west coast of South America
89. ## Maths

Find the length of the parallel of latitude 42 degree north.
90. ## algebra

A man goes 3 km north and 4 km east.Find how far away is he from his initial position?
91. ## Physics

An athlete swims from the North end to the South end of a 50.0 Meter pool in 20.0 seconds, and makes the return trip to the starting point in 20.0s A. What is the average velocity for the first half of the swim B.What is the average velocity for the
92. ## physics- i need help ASAP

A ship leaves the island of Guam and sails a distance 265 km at an angle 41.0 north of west. ***In which direction must it now head so that its resultant displacement will be 130 km directly east of Guam? (Express your answer as an angle measured south of
93. ## plz help me in physics

A ship leaves the island of Guam and sails a distance 295km at an angle 35.0 north of west. a:In which direction must it now head so that its resultant displacement will be 100km directly east of Guam? (Express your answer as an angle measured south of
94. ## Science-Repost

Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars
95. ## Is this right Ms Sue ???

through their study on earth, geographers learn how earth and its people affect ? human health the solar system each other political systems***
96. ## physics

What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 208 km above Earth's surface? (b) What is the period of revolution? I got a to be 7786 m/s^2 but im not sure how to get b.
97. ## physics

if the radius of the earth is 6.37 times 10 to the third power in km, what is the speed in km/h resulting from the rotation of earth of a person standing on the equater. then, convert the answer to m/s.
98. ## earth

How long would it take a brown dwarf star, five times the size of the Earth, to travel 450 light years, at 3500 mph?
99. ## PHYSICS

At the Earth's surface, a projectile is launched straight up at a speed of 8.4 km/s. To what height will it rise? Ignore air resistance and the rotation of the Earth.
100. ## Physics

The radius of the Earth is about 6.37 × 106 m. a) What is the centripetal acceleration of a point on the equator due to the rotation of earth about its axis? Answer in units of m/s 2