# 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.

225,384 results, page 83

1. ### History

Why was South Carolina placed under military control? I think it is because it refused to ratify the 13th Amendment, but I am not sure.
2. ### Math, please check work

find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (0,0) midpoint: (4, -3) I would Double the midpoint and add on the endpoint The other endpoint would be (8, -6) is this correct?
3. ### Physics

The 3.0 cm-diameter water line splits into two 1.0cm-diameter pipes. All pipes are circular and at the same elevation. At point A, the water speed is 2.0m/s and the gauge pressure is 50kPa. What is the gauge pressure at point B?(pointing toward one of the split pipes)
4. ### Physics 3

A potential energy function for a two-dimensional force is of the form U = 3x3y – 7x. Find the force that acts at the point (x, y).
5. ### pysics

a force of 4N at 30 degree from another force 5Nwk is pointing east. find the resistance of the two forces using parallelogram
6. ### math

What is the ratio formed between two parallelograms one is 2 inches by 6 inches and the other is 6 inches by 18 inches?
7. ### Math

Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
8. ### Math

Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
9. ### science

how a pulley works and mention its mechanical advantage? a pully work using the frictional and gravitational force when using a pully you will see that your doing work and transfering ernergy from one state to an other that is the mechanical advantage. The mechanical advantage...
10. ### AP Physics C

as she pick up her riders a bus driver traverses four successive displacements represented by the expression (-6.30 b)i-(4.00 b cos 40)i-(4.00 sin 40)j+(3.00 b cos 50)i-(3.00 b sin 50)j-(5.00 b)j here b represents one city block,a convenient unit of distance of uniform size; i...
11. ### physics

A hiker begins a trip by first walking 25.0 km 45.0° south of east from her base camp.On the second day she walks 40.0 km in a direction 60.0° north of east, at which point she discovers a forest ranger’s tower.Find the magnitude of the displacement from base camp.
12. ### Science

A girl is pulling a sled up a hill with a force of 5N. The wind is blowing at her back (uphill) with a force of 15N. The force of gravitity is 20N and friction between her boots and the snow is 5N. What is the net force, including direction, of this situation?
13. ### physics

two positive points charges of 15c and 13c are placed 12cm apart . find the work done in bringing the two charges 4cm closer.
14. ### physics

Two point charges are placed at two of the corners of a triangle (Take q1 = -10.2 µC, and q2 = 16.3 µC.) Find the magnitude and the direction of the electric field at the third corner of the triangle.
15. ### intermolecular force

In a mixture of ethanol and water, the strongest intermolecular force present between the two chemicals is ? is it hydrogen bond? yes its hydrogen bonding
16. ### Physics

In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of the figure. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 226 N, and Charles pulls with ...
17. ### math

I need a definition for this constant rate of change when graphing in mathematics and for Positive and Negative correlation and also what the pattern is in this a) 1000, 100, 10, 1 I'll give you a definition for positive and negative correlation. Correlation is a linear ...
18. ### mechanics

Two skaters, each of mass 70 kg, skate at speeds of 4 m/s in opposite directions along parallel lines 1.5 m apart. As they are about to pass one another they join hands and go into circular paths about their common center of mass. A third skater is skating at 2 m/s along a ...
19. ### physics

Forces of F1=975 N,F2= 745 N, f3= 1175 N and are applied at the same point. The angle between f1 and f2 is 60.0 degree and the angle between f2 and f3 is 30.0 degree. F2 is between f1 and f3 find the resultant force.
20. ### World History (Ms. Sue)

Explain why the British were interested in East Africa. What other countries claimed parts of East Africa? A: The British were interest in East Africa for strategic reasons--East Africa lay between the two British-controlled areas of South Africa and Egypt. However, besides ...
21. ### Science

istance of a planet from sun is four times the distance of the planet frpm earth.How many years will the planet take to complete one revolution of sun?
22. ### Algebra

(2n+1)(2n-1)(n+5) I'm a little confused on how to do this one. Any help would be greatly appreciated!!! Thanks. see the other post. see the other post. Hi Chelsea: You are given three binomials which are to be multiplied. Were you asked to multiply three numbers, e.g., (3)(4)(...
23. ### Physics/Math

Calculate the ratio of the drag force on a passenger jet flying with a speed of 750 km/h at an altitude of 10 km to the drag force on a prop-driven transport flying at one-fifth the speed and half the altitude of the jet. At 10 km the density of air is 0.38 kg/m3 and at 5.0 km...
24. ### Chemistry

How many electrons does the bromine of BrF3 have in its outermost valence shell? Is it still seven like it would be when Br is by itself? Is it four because the three F would "take" one each to fill their octets? Or is it some other number?
25. ### chemistry

Give the symbol of the element of lowest atomic number whose ground state has: a) Four f electrons b) a completed d subshell c) six s electrons I don't understand ground state electrons at all? Could you explain them in addition to explaining the questions
26. ### math

Consider a die with eight sides, marked one, two, three, and so on. Assuming equally likely outcomes, find the probability that the sum of two dice is the given number. (Enter the answer either as a fraction or as a decimal rounded to three places.) (a) P(2) = 1 (b) P(5) = 2 (...
27. ### physics

A triple beam balance, like the scales we use every week in lab, works using rotational equilibrium. If a 253 g mass is placed on the pan, 1 cm from the pivot, and there are three masses, 1 g, 10 g, and 50 g masses on the other side can be slid back and forth between 0 cm and ...
28. ### Physics

A spring is 16.2 cm long when it is lying on a table. One end is then attached to a hook and the other end is pulled by a force that increases to 28.0 N , causing the spring to stretch to a length of 19.0 cm . Part A What is the force constant of this spring? Part B-How much ...
29. ### Science

On an inclined plane, how much force will move a resistance of 30 kg? I know that 5 kg of force will move a resistance of 15 kg, but cannot see the connection between the two numbers to finish the rest of the examples.
30. ### Physics

Trace by drawing the path of a ray of light shown in 90 degrees. This ray is incident in a perpendicular direction on the figure through a glass triangular prism on one side of the right angle. Given that the two sides of the right angle are equals and that the critical angle ...
31. ### Life orientation

One environment or human factor that causes ill health or accidents in my community or any other community within South Africa.
32. ### math

2 trains leave metropolos at same, one going south 50 mph the other east 40 mph. How far apart will they be at 3 hours
33. ### physics

three equal charges each of 2.0×10^-6 are fixed at three corner of an equilateral triangle of side 5cm .find the coulomb force experience due to other two charges
34. ### physics

A 3.00 kg ball is dropped from the roof of a building 176.4 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.0 N on it. a.)How far from the building does the ball hit the ground? b.)How long does it take to hit the ground? c.)What is ...
35. ### Physics/Math

Two cars, 127 miles apart, start moving towards each other at the same time. One is moving 3 times as fast as the other. If they meet 1.5 hrs later, find the average speed of the slower car in miles per hour?
36. ### physics

A golfer takes three putts to get her ball into the hole once she is on the green. Her first putt displaces the ball 71.0 ft north; the second, 6.0 ft, 45 degrees south of east; and the third, 3.0 ft, 45 degrees south of west. What is the magnitude of the displacement (in feet...
37. ### Algebra 2

How do you set up this?I am lost Find an equation for the linear model of the situation below and use it to make a prediction. A train is traveling north at a constant rate. At 3:00 P.M. it is 55 miles north of a city. At 4:15 P.M. it is 80 miles north of the city. If d ...
38. ### math

2.Two cars leave Kansas City at the same time. One car is moving east and the other west. After 5 hours, the cars are 575 miles apart. One car is traveling 15 miles per hour faster than the other. Let S = the speed of the slower car and F = the speed of the faster car. If one ...
39. ### physics (newton's laws)

A 5.00 kg object placed on a frictionless, horizontal table is connected to a string that passes over a pulley and then is fasted to a hanging 9.00 kg object. Find the acceleration of the two objects and the tension in the string. First, there is just one force acting on the ...
40. ### physics

If I halve the distance between 2 gravitating bodies,Newtons universal law of gravity states that the force between them will____ to _____ of the force begore the change. Thank you for the help
41. ### physics

Two strong magnets on opposite sides of a small table are shown. The long-range attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 26.7 N, the weight of each magnet is 6.55 N, and the magnetic force on the lower magnet is 2...
42. ### physics

A 86 kg clock initially at rest on a horizontal floor requires a 649 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 517 N keeps it moving with a constant velocity. (a) Find μs between the clock and the floor. (b) Find μk ...
43. ### Physics

A 93 kg clock initially at rest on a horizontal floor requires a 614 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 510 N keeps it moving with a constant velocity. Find μs between the clock and the floor. Find μk between ...
44. ### criminal justice

Which of the following statements is true about police officer loyalty? A. Many police officers in various departments are slowly losing loyalty to each other because of race and gender diversification in the force. B. The code of silence is mostly a myth. C. Loyalty isn’t ...
45. ### PHYSICS

The magnetic field of the Earth at a certain location is directed vertically downward and has a magnitude of 54.0 µT. A proton is moving horizontally towards the west in this field with a speed of 6.00 ✕ 106 m/s. (a) What is the direction and magnitude of the magnetic ...
46. ### Physics

Consider the 50.0-kg mountain climber in the figure to the right. Find (a) the tension in the rope and (b) the force that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, ...
47. ### Physics

forces of 185N and 245N act east and south respectively on an 80 kg mass.If the force of friction is ZERO , find the accleration of the mass.
48. ### Physics

Two automobiles, each of mass 800kg , are moving at the same speed, 18m/s , when they collide and stick together. At what speed does the wreckage move if one car was driving north and one east.
49. ### Physics

Two automobiles, each of mass 1000kg , are moving at the same speed, 17m/s , when they collide and stick together. At what speed does the wreckage move if one car was driving north and one east?
50. ### Math

Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know ...
51. ### Repost repost physics

Posted by Meredith Mcneeds Help! on Monday, November 19, 2007 at 8:08pm. Hey, ok so I am supposed to be helping my cousin this with this physics problem, and this is the only one that has ever stumped me! Neutral metal spheres A and B each of mass 0.2 kg hang from insulating ...

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...
53. ### Physics

3 identical point charges Q are placed at the vertices of equilateral triangle (length of each side is equal to 2m) if Q=60uC, what is the magnitude of Electrostatic force on any one of the charges.
54. ### Physics

A satellite orbits the Earth with a radius of 7000km. The acceleration of gravity at this distance=8.17m/s/s. How do I find the velocity of the satellite? I'm really struggling with finding the correct formula. I know the answer but can't figure out how to get there. Thanks if...
55. ### physics is annoying

In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the overhead view of the figure. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 227 N, and Charles pulls with ...
56. ### Maths

a ship A is 5 nautical miles due north of ship B. Ship A is steaming due west of at 15 knots and B is steaming due north west at 10 knots. Find the distance and the time of their nearest approach to each other
57. ### Algebra 1

1. A bag contains 3 red marbles, 2 blue marbles, and 5 green marbles. What is the probability of randomly selecting a red marble then, without replacing it, randomly selecting a green marble? 2. A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are...
58. ### Math, Ms. Sue Help asap plss

Can the numbers 24, 32, and 40 be the lengths of three sides of a triangle? Why or why not My answer: Yes it can. Because the 3 lengths satisfy the triangle inequality theorem. The triangle inequality theorem states that the third side of a triangle must be greater than the ...
59. ### physics

A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below the surface. Calculate the force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.
60. ### Physics

Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is caused by air ...
61. ### Physics

Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek sports car, has a motor that delivers only 35 kW of power at this speed. The other car needs its motor to produce 65 kW to move the car this fast. The difference is caused by air ...
62. ### English A1 Poem

All afternoon my brothers and I have worked in the orchard, Digging this hole, laying you into it, carefully packing the soil. Rain blackened the horizon, but cold winds kept it over the Pacific, And the sky above us stayed the dull gray Of an old year coming to an end. In ...
63. ### HISTORY

Where would you most likely find South America's largest cities? mountains ****** rain forests coastlines deserts 2. How did human migration most contribute to ethnic diversity in South America today? People came to South America from different parts of the world over time. ...
64. ### physics

1) A jogger runs directly east for 5 km, then turns and goes northwest for 7 km. He then travels directly south for 5 km. How far is he from the starting point? (km) 2) In what direction is he from the starting point(measured as an angle counterwise from the east axis, units ...
65. ### Math

the length of the hypotenuse of a right angled triangle is one unit more than twice the length of shortest side and the other side is one unit less than twice the length of the shortest side. find the lengths of other two sides.
66. ### Physics

In the figure, a 52 kg rock climber is climbing a “chimney” between two rock slabs. The coefficient of static friction between her shoes and the rock is 1.20; between her back and the rock it is 0.707. She has reduced her push against the rock until her back and her shoes ...
67. ### geometry

A plane is heading west at 200 mph. The wind is blowing S30°W at 25 mph. 1. What is the ground speed of the plane? 2. When you solve the triangle, what is the smallest angle? 3. What is the largest angle of the triangle? 4. What is the remaining angle? 5. What is the bearing ...
68. ### rela

you will develop a project that communicates to people something about your world. i don't mean planet earth i mean the circumstances in which you find yourself on a daily basis your project should include information about many different parts of your life. you might choose ...
69. ### Physics

Please help! I've tried several times on my calculator and I can't get it right! Find the force of attraction on a 3 kg mass at the surface of a planet given the following information about the planet: mass = 5.98 x 1024 kg, radius = 6.38 x 106 m. Find the force if the radius ...
70. ### Chemistry

A 35.00 mL sample of water at 30.0°C is placed in an open container with an external pressure of 1.00 atm. 30.0 kJ of heat is added to the water sample. The density of water is 1 g/mL. (a) How many grams of liquid water remain at the end of the process? Like, the equation I ...
71. ### pysics

a .15 kg ball is placed in a shallow wedge with an opening angle of 120 degrees. for each contatct point between the wedge and the ball, determine the force exerted on the ball. assume the system is frictionless.
72. ### mathematics

two springs and two masses are attached in a straight line on a horizontal frictionless surface. the system is set in motion by given external force f(t) acting on the right hand mass m2. we denoted by x(t)the displacement(to the right) of mass m1 from static equilibrium ...
73. ### Physics

Two 125 N forces pull on a 50 kg mass. One of the forces pulls to the right and the other pulls 90 degrees from the first force. What is the net acceleration of the mass?
74. ### Social Studies

How did various inventions impact the economic development of differing areas of the country (North, South, and West)? Please help :)
75. ### Us History

please help me! what was the percentage of african slaves in the north, south,east, and west in the years of 1820,1835,1845, and 1860??
76. ### Social Studies

Eli Whitney revolutionized industry in the north and south and impacted the Civil War. What 2 key innovations is he attributed with?
77. ### SOCIAL STUDIEs

Eli Whitney revolutionized indusrty in the north and south and impacted the Civil War. What 2 key innovations is he attributed with?
78. ### History

How was the West drawn closer to the North and the South further isolated? Why did an increase in productivity lead to an improvement in transportation technology ?
79. ### Physics

Forces of 10.3N north, 19.5N east, and 15.2N south are simultaneously applied to a 4.06kg mass as it rests on an air table. What is the magnitude of its acceleration?
80. ### Social Studies

3 which U.S. region was most impacted by the completion of transportation of the transcontinental railroad in 1869 A South B west ** C east D North
81. ### physics

two charge 5NC and -2NC are placed at a point (5cm,0,0)and (23cm,0,0)in a region of a space where there is no other electric field.calculate the electrostatic potential energy of this charged system
82. ### Physics

In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) must be placed at the empty corner? (the rectangle has +3 uC charges in ...
83. ### HISTORY HELP plsssssssss

Use this map to answer the following question: This image shows a map of South America. The western coast is shaded blue. There are four numbers marking different areas on the coast. The first number marks an area at the very top of the shaded area. The number 4 marks the area...
84. ### History8

The North’s blockade of the Southern sea ports was challenged in an early battle at sea between which two iron-clad vessels?
85. ### physics

Three deer, A, B, and C, are grazing in a field. Deer B is located 61.1 m from deer A at an angle of 50.9° north of west. Deer C is located 78.4° north of east relative to deer A. The distance between deer B and C is 92.2 m. What is the distance between deer A and C?
86. ### physics

Three deer, A, B, and C, are grazing in a field. Deer B is located 63.4 m from deer A at an angle of 50.8 ° north of west. Deer C is located 76.7 ° north of east relative to deer A. The distance between deer B and C is 96.7 m. What is the distance between deer A and C?
87. ### physics

Three deer, A, B, and C, are grazing in a field. Deer B is located 61.0 m from deer A at an angle of 54.1 ° north of west. Deer C is located 79.8 ° north of east relative to deer A. The distance between deer B and C is 98.1 m. What is the distance between deer A and C?
88. ### English

The Forsaken i think personification be this one: All the lake-surface Streamed with the hissing Of millions of iceflakes Hurled by the wind; Behind her the round Of a lonely island Roared like a fire With the voice of the storm In the deeps of the cedars. i think this be ...
89. ### Math

Two ships are moving toward a rendezvous point. Ship A is 5km east and 4km north of the point Ship B is 1km west and 2km north pf the point. How many km part are the two ships? Please . I really need your help
90. ### electrical engineering

A 3-ph., 4-pole, 60Hz induction motor is supplied by a 660-V source. At a particular loading, the total power consumed is 65KW and the current drawn from supply is 70A (assume star connection). The rotor speed is 1760rpm. The stator iron losses are 1.2KW, the windage and ...
91. ### Earth and Space Science

Clouds form primarily at the boundary between a)the stratosphere and mesosphere b)the mesosphere and ionosphere c)the troposphere and mesosphere d)the troposphere and stratosphere e)the hydrosphere and troposphere
92. ### Physics

A transport plane takes off from a level landing field with two gliders in tow, one behind the other. The mass of each glider is 700 {kg}, and the total resistance (air drag plus friction with the runway) on each may be assumed constant and equal to 2100N . The tension in the ...
93. ### physics

Block M = 7.50 kg is initially moving up the incline and is increasing speed with a = 3.82 m/s2 . The applied force F is horizontal. The coecients of friction between the block and incline are s = 0.443 and k = 0.312. The angle of the incline is 25.0 degrees. (a) What is ...
94. ### Physics

A 100kg trolley is being pushed up a rough 30° incline by a constant force. The friction force between the incline and the trolley is 110N. (a) Determine thd value of the constant force that will move the trolley up the incline at a constant velocity of 5m/s. (b) Find the ...
95. ### dynamics

(a) A rocket is travelling out of the earth’s atmosphere. During flight it burns fuel at a rate of 80kg/s producing a constant thrust of 500kN which drives the rocket in a vertical trajectory. It has a mass of 3500Kg when it reaches a speed of 1220m/s. At this point in the ...
96. ### physics

A semi circular rail of horizontal diameter AB=2R is placed in a vertical plane. Two particles S1 and S2 of respective masses m1 and m2 (m1 <m2) slide without friction on the inner surface of this rail. A) Particle S1 is released at point B without initial velocity ....
97. ### math

the problem is to use the information given to figure our who will win the third round of tugofwar. round 1 on one side are four acrobats, each of equal strength. on the other side are five neighborhood grandmas, each of equal strength. the result is dead even. round2 on one ...
98. ### social studies HELP PLSS

1. Which of the following was the provision in the treaty of paris 1763? A.All french land in north america was being given to england B.All french land in north america was being given to spain C.All french land west of mississippi & louisiana were to be given to england D. ...
99. ### Maths and Physics

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 (10 marks). Kind Regards
100. ### Physics

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one?