# 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.

117,802 results, page 9

1. ### College Physics

a 5.63kg ball hangs from a vertical pole by a 2.4 long string. Assume the ball is moving at 4.33m/s in a horizontal circle with the string remaining taut. Calculate the angle that the string makes with the pole.
2. ### math

A guy wire (a tensioned cable designed to add stability to a free-standing structure) is attached to a telephone pole whose height is 25 ft. If the wire is attached to the ground at a point 15 ft away from the base of the pole, what is the slope of the wire?
3. ### Physics

A projectile is fired vertically from Earth's surface with an initial speed v0. Neglecting air drag, how far above the surface of Earth will it go? (Use any variable or symbol stated above along with the following as necessary: ME for the mass of the Earth, rE for the radius ...
4. ### Earth Science

How to draw 40 degrees north and 70 degrees south with latitude and longitude
5. ### Physics

Two wires run from the top of a pole 2.6m tall that supports a volleyball net. The two wires are anchored to the ground 2.0m apart, and each is 2.0m from the pole. The tension in each wire is 100N. here are the dimensions. I do not understand how to setup work. if could show I...
6. ### science

The pull of gravity keeps the Moon in orbit around Earth. The distance between the Earth and Moon is about 380,000 kilometers. A crew of astronauts leaves Earth on a Monday and lands on the Moon on a Thursday. They land on the side of the Moon facing away from the Earth. On ...
7. ### Coriolis effect

Does anyone wish to discuss the Coriolis effect/force? Mike http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/fw/crls.rxml The thing I find teasing about the coriolis effect is that the faster the wind or an object is travelling the greater the deflection. Take the N Hemisphere, ...
8. ### Physics

Sally has a mass of 50.0kg and earth has a mass of 5.98X10^24kg. The radius of earth is 6.371x10^6m. A)What is the force of gravitational attraction between sally and earth? B)What is Sally's weight?
9. ### Physics

The Moon orbits the Earth at a distance of 3.85 x 108 m. Assume that this distance is between the centers of the Earth and the Moon and that the mass of the Earth is 5.98 x 1024 kg. Find the period for the Moon's motion around the Earth. Express the answer in days. The unit ...
10. ### physics

Two satellites are orbiting the Earth in stable circular orbits. Satellite A has a mass m and is located at a distance 2r from the center of the Earth. Satellite B has a mass 2m and is located at a distance r from the center of the Earth. Which one of the following statements ...
11. ### georaphy

Can you help? Is the Arctic Circle north or south of the Tropic of Capricorn? My Mom says it can be north or south of the Tropic of Capricorn because the earth is round. My answer is the Arctic Circle is north of the Tropic of Capricorn. WHO is RIGHT, Me or my Mom?
12. ### Physics

Earth has a mass of 5.97x10^24kg and a radius of 6.38x10^6m. Find the wight of a 65.0kg person on the surface of the earth and 1000km above the surface of earth?
13. ### physics

the rotation of earth is a period of 86164 seconds. the earth has a radius of 6380 km. how fast would you be moving due to earths rotation at the equator? also how fast would you be moving at a latitude of 27 degrees north of the equator? also calculate the centripetal ...
14. ### Astronomy help

I have already solve the problems in many time, but still cannot get the correct answer, can someone kindly help me to solve the problem, please? 1. Suppose the Moon is at a (center-to-center) distance D from Earth. Find an exact expression for the magnitude of the tidal force...
15. ### Physics

1)The Earth exerts an 710 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N 2)If a book is sitting on a table, the force of gravity pulls it down. Why doesn’t it fall? Is it because The table is pushing up on it with a force ...
16. ### physics

person weighs 526 N on Earth. Another planet has twice the mass of Earth and Twice the radius of Earth. Find the weight on the other planet. I need help with a formula too.
17. ### 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 less than C) is the ...
18. ### physics

Sally has a mass of 58.0 kg and Earth has a mass of 5.98 1024 kg. The radius of Earth is 6.371 106 m. What is the force of gravitational attraction between Sally and Earth? What is Sally's weight?
19. ### physics

The earth exerts a downward force of 850 N on a veteran astronaut as he works outside the space shuttle. What force (if any) does the astronaut exert on the earth?
20. ### physics

An artificial satellite circling the Earth completes each orbit in 139 minutes. (The radius of the Earth is 6.38 106 m. The mass of the Earth is 5.98 1024 kg.) (a) Find the altitude of the satellite.
21. ### physics

A child learns in school that the earth is traveling faster than 100,000 kilometers per hour around the sun, and in a frightened tone asks why we arent swept off. What statement about the motion of the Earth is, on average,true? A. We are traveling slower than the Earth B. We ...
22. ### brain teaser

You are in a rectangular house with large picture windows on all 4 sides. All 4 sides of the house have a southern exposure. From one of the windows you see a bear. What kind of bear is it and why? You're at the North Pole and it is a polar bear. You face south from each of ...
23. ### geometry

Two vertical poles 20 meterd and 30 metrrd high, are 60 meters apart. A rope is to be attached from the top of one pole to a point on the ground half-way between the poles and then to the top of other pole. How long a rope is needed?
24. ### algebra

Two vertical poles 20m and 30m high are 60m apart.A rope is to be attached from the top of one pole to a point on the ground halfway between the poles and then to the top of the other pole.How long a rope is needed?
25. ### Trigo

A vertical pole is standing on a slope that is inclined at an angle 8 degrees to the horizontal and casts a shadow that is 82 ft. long down the slope. How tall is the pole if the angle of elevation of the sun is 28 degrees?
26. ### physics

4(a) What is the magnitude of the gravitational force of the Earth on a surveillance satellite of mass 1040 kg that is in a grazing circular orbit 100 km above the surface of the Earth. (b) Find the magnitude of the acceleration of a satellite in such a grazing orbit. (c) ...
27. ### earth

Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 11 Earth radii from Earth's center?
28. ### earth

A particle weighs 120 N on the surface of the earth. At what height above the earth's surface will its weight be 30 N? Radius of the earth = 6,400 km.
29. ### science

A distant spaceship carrying a red headlight, emitting light with wavelength 600nm, is heading towards the earth. Observers on the earth detect the light from the headlight as ultraviolet light with wavelength 200nm. What is the velocity of the spaceship? b) As the space ship ...
30. ### Science

If the earth exerts a 500 N gravitational force on an object in near space, how much force does this object exert on the earth, and by what law can this be asserted?
31. ### physics

The earth attracts a large ﬂying bug toward its center with a force of 0.10 Newtons. With what force does the bug attract the earth itself?
32. ### physics for physical science

(a)what is the magnitude of the gravitational force of the earth on a surveillance satellite of mass 1040kg that is in a grazing circular orbit 100 km above the surface of the earth. (b)find the magnitude of the acceleration of the satellite in such a grazing orbit. (c)...

How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The gravitation force is F=GMm/r^2, where M is the mass of the earth, m is the mass of the satellite, and r is the distance between them. The radius of the earth is 6....
34. ### Math

How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The gravitation force is F=GMm/r^2, where M is the mass of the earth, m is the mass of the satellite, and r is the distance between them. The radius of the earth is 6....
35. ### Physics

How would the sun's gravitational force on earth change if Earth had twice its present mass?
36. ### Science

What the force of attraction between earth and objects on earth surface pesanteur..I need it English
37. ### earth

if n the diameter of the earth is 19.7Mm , what is in cm
38. ### trig

This a problem I need help with. A vertical ple stands by a road that is inclined 10 degrees to the horizontal. When the angle of elevation of the sun is 23 degrees, the pole casts a shadow 38 ft long directly downhill along the road. How long is the pole?
39. ### Earth Science

What would be the strongest gravitational force if an astronaut is between Earth and the Moon?
40. ### algebra

The force of gravity is inversely proportional to the square of the center of the earth. if you weigh 120 lbs on the surface of the earth, how much would you weigh 250 miles above the surface? (Earth's radius = 4000 miles)
41. ### Physics 2

what magnetic force would an electron experience due to Earth’s magnetic field if it were moving at 3x10E6 m/s directly away from earth’s surface? (Earth’s B-field in the region is parallel to the surface and has a strength of 550 µT)
42. ### geography

Can you check my answers please? 1. Who has sunrise first, eastern or western Europe? Eastern Europe 2. What is the capital of the country that has a border with Hungary and a coastline on the Black Sea? Bucharest, Romania 3. Is the Arctic Circle closer to the equator or the ...
43. ### College Algebra

A 30-foot string of lights will be attached to the top of a 24-foot pole for a holiday display. How far away from the base of the pole should the end of the string of lights be anchored.
44. ### 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.)
45. ### Astronomy

1. How did the geocentric model explain the retrograde motion of planets? A. Earth moves faster in its orbit and passes the other planets. B. The planets move backward when they get too close to earth. C. The planets travel in circles as they move around earth in a circle. D. ...
46. ### force of gravity

A satellite orbits around the earth. The mass of the satellite is 1170 kg, and its altitude is 220 km. The mass of the earth is 5.98×1024 kg. The radius of the earth is 6.38×106 m. 1)What is the gravitational force on the satellite? 2)What is the orbital velocity of the ...
47. ### physics

A bag of sugar weighs 3.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? N Repeat for Jupiter, where g is 2.64 times that on Earth. N Find the mass of the bag of sugar in kilograms at each of the three ...
48. ### physics

A bag of sugar weighs 3.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? N Repeat for Jupiter, where g is 2.64 times that on Earth. N Find the mass of the bag of sugar in kilograms at each of the three ...
49. ### Physics

A bag of sugar weighs 4.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? 1 N Repeat for Jupiter, where g is 2.64 times that on Earth. 2 N Find the mass of the bag of sugar in kilograms at each of the three...
50. ### physics

A bag of sugar weighs 3.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? N Repeat for Jupiter, where g is 2.64 times that on Earth. N Find the mass of the bag of sugar in kilograms at each of the three ...
51. ### math

An object's weight on the Moon is less than its weight on Earth. This is because the Moon exerts less gravitational force on an object than Earth does. The equation m = can be used to find an object¿s weight on the moon, where m is the object¿s weight on the Moon, and e is ...

A long,straight current-carrying wire runs from north to south. A) A compass needle placed above the wire points with its N-pole toward the east. In what direction is the current flowing? B) If a compass is put underneath the wire, which direction will the compass neddle point?
53. ### Physics

I'm not sure how to go about solving this problem the algebra gets very messy... At what distance formt he EArth will a spacecraft on the way to the Moon experiance zero net force due to there two bodies because the Earth and Moon pull with equal and opposite force? THANKS
54. ### astronomy

If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters.
55. ### Physics

Assume that you havea mass of 65 kg. I you are standing on the surface of Earth, What is the force of gravitational attraction between you and the earth?
56. ### physical

calculate the force of gravity on a 1.2 x 10^5 kg space station at a distance of 3.5 x 10^5 m from earth's surface earth equal to 5.98 x 10^24 kg
57. ### Physics

Calculate the force of earths Gravity on a 2.00 earth radii above the earth surface if it's mass is 1850kg.
58. ### science

The Earth exerts an 850 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N
59. ### physics

The Earth exerts an 680 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N
60. ### Physics

The Earth exerts an 640 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N.
61. ### math

a fish with a mass of 4kg causes a fishing pole to bend 10cm. if the amount of bending (b) varies directly as the mass (m), how much will the pole bend for a 7 kg of fish

A yardstick casts a shadow of 24 in. at the same time a telephone pole casts a shadow of 20 ft 8 in. What is the height of the telephone pole, to the nearest inch? (1 yd = 36 in., and 1 ft = 12 in.)
63. ### trigonometry

From the roof of the building 25 meters high, the angle of elevation of the top of the pole is 21°11’ , from the bottom of the building, the angle of elevation is 43°2’, determine the height of the pole .
64. ### trigonometry

From the roof of the building 25 meters high, the angle of elevation of the top of the pole is 21°11’ , from the bottom of the building, the angle of elevation is 43°2’, determine the height of the pole .
65. ### physics

A geosynchronous Earth satellite is one that has an orbital period equal to the rotational period of the Earth. Such orbits are useful for communication and weather observation because the satellite remains above the same point on Earth, provided it orbits in the equatorial ...
66. ### AP Biology

How many joules of sunlight hit Earth per day? I have looked everywhere and can't find an answer!! The sun emits about 4*10^26 Watt. The flux of solar energy at the Earth is thus about: F = 4*10^26 Watt/(4 pi R^2) where R = 149.6*10^9 meters is the Sun-Earth distance: F = 1422...
67. ### physics

radius R of the orbit of a geosynchronous satellite that circles the earth. (Note that R is measured from the center of the earth, not the surface.) You may use the following constants: The universal gravitational constant G is 6.67×10−11N⋅m2/kg2. The mass of the ...
68. ### physics

If the earth acceleration due to gravity on a mass of 2000kg on the earth surface is 10ms.What will be the acceleration due to gravity when it is at a point twice the radius of the earth.What is the gravitational force on it.
69. ### physical science

the attraction or pull of a person"s body toward the earth by the earth is called weight.the reaction to this force is the:
70. ### Physics

A 5.0-kg rock and a 3.8 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.
71. ### P

Calculate the magnitude of the gravitational force exerted on a 1,405-kg satellite that is a distance of two earth radii from the center of the earth.
72. ### Physics: Astronauts and space

When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth.The distance separating the center of the earth from the center of the ISS is then approximately ...
73. ### Algebra

A wire is run between two tips of two poles. One pole is 23 ft. taller than the other pole. The poles are 37 ft. apart. How long does the wire need to be to reach between the two poles?
74. ### Science

Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the ...
75. ### Math

A person is standing next to a flag pole.The person is 6ft tall.She casts a shadow 10 ft long.The flag pole casts a shadow of 45 ft long.How tall is the flag pole.
76. ### physics

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

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

Would you expect to find more dissolved oxygen in ocean water around the North Pole or in ocean water nearer the equator?Why?
79. ### Science

A Space Traveller determine the radius of a Planet to be half that of the earth after landing on its surface he find the acceleration due to gravity to be twice of the surface of the earth find the ratio of the mass of a planet to the earth
80. ### Spanish

Im reading spanish-english childrens books to help me w the language bc i like the pictures A sentence says: "I can go down the pole/ Yo puedo deslizarme por el poste" I can go down the pole belonging to me? She's in the park lol. And the pg right next to it has a boy going ...
81. ### physics

the gravitational force on an object on the surface of the earth is F , what's the gravitational force on the satelite when at height R/20, where R is the radius of the Earth ?
82. ### Physical Science

The only force acting on a satellite in its orbit around Earth is the force of gravity from Earth. Why does a satellite not fall down?
83. ### maths

A satellite travels around the earth in a circulsr orbit 700 kilometres above the earth's surface. Find the radius of the satellite's orbit if the radius of the earth is 6400 kilometres. Also find the distance traveled by the satellite in one orbit of da earth. Express answer ...
84. ### 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?
85. ### Math, Physics

Calculate Earth's gravitational force on the ISS astronauts while orbiting at an altitude of 401.5 km above Earth’s surface.
86. ### 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
87. ### 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
88. ### science(2 Qs)

PLEASE ANSWER MY 2 QUESTIONS IN SCIENCE THANKS 3.when a negatively charged object moves in the opposite direction of an electric force field,the potential energy of the object. A.becomes zero(I PICK THIS) B.increases C.decreases D.stays the same 4.the two south pole ends of ...
89. ### GLOBE ACTIVITY

How many degrees is the Arctic Circle displaced from the North Pole? http://geography.about.com/od/physicalgeography/a/idl.htm
90. ### earth

The Earth orbits the Sun once every 365 days. The distance between the Earth and the Sun is 1.5 x 1011 m. What is the average orbital velocity of the Earth as it travels around the Sun?

1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on*** c. disconnected d. off 2. The focus of gravity on an object on the surface of Mars is ...
92. ### 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 earth=5.98 × 1024 kg, mass...
93. ### Physics

An electron is moving paralel to the Earth's surface at the equator in a direction 12 degrees south of east. Its velocity is 9.2 x 10^4 m/s and a magnetic force of 9.4 x 10^-18 N is exerted on the electron. If the magnetic field points south at this location, what is the ...
94. ### Physics

A river flows due south with a speed of 2.00 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.20 m/s due east. The river is 800 m wide. What is the magnitude of his velocity relative to the earth? got it....4.65 m/s What is the direction ...
95. ### Physics

In order to handle a hot pizza of mass 1.0 kg, a cook slides a light (i.e., of negligible mass) but stiff spatula of length 2.0 m from the right hand to the center of the pizza, which he then carries horizontally with both hands. His right hand is at one end of the pole (point...
96. ### Trig

A straight road slopes upward 14 degrees from the horizontal. A vertical telephone pole beside the road casts a shadow of 60 feet down the road. if the angle of elevation of the sun is 55 degrees, what is the height of the telephone pole?
97. ### Physics

A satellite used in a cellular telephone network has a mass of 2160 kg and is in a circular orbit at a height of 670 km above the surface of the earth. What is the gravitational force Fgrav on the satellite? Take the gravitational constant to be = 6.67×10−11 N*m^2/kg^2...
98. ### Science 7

1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on*** c. disconnected d. off 2. The focus of gravity on an object on the surface of Mars is ...
99. ### AP Physics

A light string that is attached to a large block of mass 4m passes over a pulley with negligible rotational inertia and is wrapped around a vertical pole of radius r. The system is released from rest, and as the block descends the string unwinds and the vertical pole with its ...
100. ### English

What makes our earth sick? - Steel cans make the earth sick. - Shampoo makes the earth sick. - Empty bottles make the earth sick. - Plastic bags make the earth sick. - ___________ make/makes the earth sick. (Are the answers all grammatical? What other expressions can we use in...