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 81

physics
In Figure 1268, two identical, uniform, and frictionless spheres, each of mass 4.1 kg, rest in a rigid rectangular container. A line connecting their centers is at 45° to the horizontal. Find the magnitudes of the forces on the spheres from (a) the bottom of the container, (... 
math
find the missing length in this diagram showing a Tsquare. (reduce the radical to simplist form. 6 cm (one side of triangle) 3 cm ( other side of triangle) the third side (diagonal line conecting other two sides)= x cm. 
English
In my class we're doing abbreviations, and I'm entirely stuck on this one. The abbreviation is NAmlnd. I'm guessing the first two words is North America, and I'm not sure what the last four letters stand for. Since this came from a crossword puzzle, in all, the total number of... 
physics
Island A is 500km east and 320km south of Island B. Island C is 75km east and 1015km north of island A. find the components of the (delta)r vector value pointing from island B to island C 
7th grade science help the solar system Ms. Sue
1. Most likely, ____ were formed when lava from the moon's interior flooded bowllike regions on the moon's surface. (1 point) maria highlands craters basins 2. Depressions on the moon formed by large meteorites are called ____. (1 point) maria mountains craters highlands 3. ... 
Math
In a group of 9 coins, one is fake and weighs slightly less. What is the fewest number of times you need to use a pan balance to find the counterfeit coins? (A pan balance is a scale used to measure weights, where weights are placed in two pans. The heaviest pan will go down ... 
Physics 141
A 45.0kg skater is traveling due east at a speed of 2.85 m/s. A 72.5kg skater is moving due south at a speed of 7.35 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find the following... 
math
Two people start at the same point One walks east at 2mph and the other walks southwest at 3mph. How fast is the distance between them changing after 30 minutes? 
stats
Particles are a major component of air pollution in many areas. It is of interest to study the sizes of contaminating particles. Let X represent the diameter, in micrometers, of a randomly chosen particle. Assume that in a certain area, the probability density function of X is... 
Physics
The two blocks (m = 13 kg and M = 89 kg) are not attached to each other. The coefficient of static friction between the blocks is μs = 0.50, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal force (F) required to ... 
physics
Two point charges of 86.5 mC and 36.3 mC are held fixed on an x axis at the origin and x = 24.4 cm, respectively. What are the magnitude and direction of the total electrostatic force on a third charge of 18.8 mC placed at (a) x = 48.8 cm (b) x = 97.6 cm I've tried everything... 
Physics
The electrostatic force of attraction between two small spheres that are 1.0 meter apart is F. If the distance between the spheres is decreased to 0.5 meter, the electrostatic force will be a) F/2 b) 2f c) F/4 d) 4F I know when the distance is decreased the Fe would decrease ... 
Physical Science
Two parallel transmission wires are laid between electrical towers. The distance between towers is 200 m, while the separation between the parallel wires is only 2.5 m. If the wires carry each a current of 1000 A, the magnitude of the force between the wires is closest to ... ... 
Geometry
2.Given two segments with lengths x and y (x does not equal y), which three special parallelograms meet the three sets of given conditions? a. One diagonal has length x, the other has length y. b. The diagonals intersect at right angles. c. Both diagonals have length y and do ... 
Physics
ObiWan lands his spacecraft on an unknown planet. Visibility is poor, so he isn't able to exactly determine on which planet he has landed. He finds someone on a local communications channel and asks for directions to Earth. "You are already on Earth," is the reply, "Wait ... 
Physics
Two point charges of 8.7×10−6 C, on the left, and −2.7×10−6 C, directly to its right, are separated by 0.071 m. Find the electrostatic force acting on the charge on the left. A force to the right is taken as positive, while one directed to the left is ... 
math
The sum of two numbers is 31.2/3 of one of the numbers is equal to 5/8 of the other.find the two numbers 
Geography
Okay, I think I have the correct answer for this question. Please let me know if I am correct. Which Sea is largest? North, Mediterranean, Caspian, or South China? I find it to be the Caspian Sea at 371000 sq km. Am I correct???? 
English
Two of your friends are fighting with each other. What could you say to help them? Why don't you sit down with each other? Each person can hear the other one's side of the story. 1. Why don't you sit down with each other? (What is the action of each person? Are they required ... 
History!
Can someone Please help me!? 1. What resulted from Parliament’s lack of understanding of the needs of the colonists? (1 point) a study to prioritize the needs in the colonies sending more British representatives to America the beginnings of selfgovernment in the colonies ... 
Eletrostatic
Three charges q, 2q, and 3q are arragend to form a equileteral triangle. A charge Q is placed at the center of the triagle. What´s the Net Force about Q. Give the modulus and the direcction of the force. 
Ela and this is my last question
At the Earth’s Core Edgar Rice Burroughs 1 “Let’s have a look beyond that door, David,” he cried. 2 Together we stepped out to stand in silent contemplation of a landscape at once weird and beautiful. Before us a low and level shore stretched down to a silent sea. As ... 
math
two cylindrical tanks have the same height, but the radius of one tank equals the diameter of the other. if the volume of the larger is k% more than the volume of the smaller, k= ? a)50 b)100 c)200 d)300 e)400 small tank volume: pi*(r/2)^2*h big tank volume: pi*r^2*h factor ... 
physics
The gravitational force between two metal spheres with the same masses are in outer space is 60 N. How large would this force be if the masses of each sphere were cut to a fourth of its original value? F_{attractive} =_____________ N (no rounding up) 
Chemistry
Is dissolving salt in water an example of reversible? I don't think so because once salt is in water, the water is not clear anymore. Pls help. thanks. Yes, it is reversible. One ca physically separate the salt and water (evaporation) What do you mean by not clear? When salt ... 
english
Treat the Earth and all that dwell thereon with respect. Remain close to the Great Spirit. Show great respect for your fellow beings. Work together for the benefit of all Mankind. Give assistance and kindness wherever needed. Do what you know to be right. Look after the well ... 
science
The movement of the earth around the sun____. a) is one of the reasons for seasons b) results in the formation of day and night c) makes the sun rise in the east d) causes earthquakes e) cause the ice ages to reoccur Just need to know if my answer or right or wrong. Thanks! :) a 
geography
Which statement below are examples of human geography "Except"! A. interaction patterns between people B. People's minds and thought processes C. people's interaction within the community. D. Earth's various climates and multiple layers of atmosphere. 
U.S History  Pls check my answer :)
Document E – “Have the Northern states any idea of the value of our slaves? At least, sir, six hundred millions of dollars. If we lose them, the value of the lands they cultivate will be diminished in all cases one half, and in many they will become wholly useless. And an ... 
Probability
The newest invention of the 6.041x staff is a threesided die. On any roll of this die, the result is 1 with probability 1/2, 2 with probability 1/4, and 3 with probability 1/4. Consider a sequence of six independent rolls of this die. 1. Find the probability that exactly two ... 
As Physics
Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ... 
Physics
I don't know how to solve this problem. In it, I am given the mass (4 kg), acceleration (0), velocity (20 m/s), coefficient of friction (.2), and the applied force (10 N downwards with an angle of 30 degrees above the horizontal). I must find the displacement of the object if ... 
earth science
discuss stellar evolution(briefly describe each stage). what forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star? 
Science
You're in a room with two doors one door leads to nothing and the other one leads outside one door always tells the truth and the other always lies you get one question to ask one door what would you ask to figure out which door to take to get outside 
Physics
A jogger travels a route that has two parts. The first is a displacement A of magnitude 2.70 km due south, and the second involves a displacement B that points due east. What is the direction of A + B relative to due south? ° What would be the direction of A  B relative to ... 
computers please check my answer
please see if my answers are correct thanks :) Define the following terms Label = Anything that you define as text. Value = Anything that has numerical value and can be used in mathematical calculations. Thumbnail = Usually associated with a graphics image. It is a small ... 
PHYSICS HELP
A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of the table. The other ... 
Physics
A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of the table. The other ... 
Math
For each object, its surface area, and some dimensions are given. Calculate the dimension indicated by the variable to the nearest tenth of a unit. a) right cone SA=7012mm^2 GIVEN=diameter of 48mm b) right square pyramid SA=65.5m^2 GIVEN=length of 3.5m 
Periodic Function (Trigonometric Fuctions)
A lighthouse beacon rotates through 360 degrees every 12 seconds, it is located 100 m off the shore of an island with a coastline of steep cliffs running north and south. As the light beam sweeps clockwise, starting from the north (direction of 0 degrees), it strikes some part... 
history
im doing and english essay, and i have to answer this question. How do the differences in the original 13 colonies lead to the development of "the north" and "the south"? 
HIS 115  American History to 1865
What social, political, and economic changes pulled the North and the South further apart? 
Physics
Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration? 
Physics
Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration? 
Physics
Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration? 
Physics
Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration? 
Physics
Forces of 10.6 N north, 20.8 N east, and 14.3 N south are simultaneously applied to a 3.76 kg mass as it rests on an air table. What is the magnitude of its acceleration? 
SS7R  ANSWER ASAP FINAL EXAM START@1:30 TODAY
what are the advantages of the north and south in the civil war and what's their strategies? 
Physics
A man was lost in the woods. He wanders 3 km north, then 7 km east, then 7 km south, then 4 km west. What is the magnitude and direction of his resultant displacement? 
Us history
In the monroe doctrine what does the United States say it will do if any European colonies in North or South America declare their independence? 
Social Studies
1. In the AD 600s, North africa was conquered by A. Egyptians B. Arab Muslims C. Europeans D. Africans from south of the Sahara 
physics
A charge of 3.75 109 C is located 3.1 m from a charge of 3.10 109 C. Find the magnitude of the electrostatic force exerted by one charge on the other. a)increases or b)decreases or c)remains the same 
english
“Invisible Children”, a documentary filmed by three American college students Jason Russell, Bobby Bailey, and Laren Pole, set out to Africa in search “for a story”,however, they uncovered the immense suffering of a civilian population in northern Uganda. Should I put ... 
Biology
These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eightelement periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ... 
Biology
These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eightelement periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ... 
physics
If the magnitude of the electric field in air exceeds roughly 3 106 N/C, the air breaks down and a spark forms. For a twodisk capacitor of radius 49 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (... 
Geometry 9th grade
One of two supplementary angles is 4 times the other. Find the larger angle. 
Math
find the measure of two complementary angles if one is 20 degrees more than 4 times the other angle. 
maths
the difference of two positive number is 69 the quotient obtained on dividing one by the the other is 4 find the numbers 
Physics
Gravitational force of attraction "F" exists between two point masses A and B when a fixed distance separates them. After mass A is doubled and mass B is quarted, the gravitational attraction between the two masses is: Do you add 2 and 4? 
integrated science
with all other factors equal, if you double the balanced force on an abject of a given mass the acceleration will be? 
Physics
Two charges are placed on the x axis. One of the charges (q1 = +9.3 µC) is at x1 = +3.4 cm and the other (q2 = 20 µC) is at x2 = +8.9 cm. (a) Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the direction along the ... 
Earth science
What kind of front sometimes spawns tornadoes between an advancing cold and dry air mass and a warm moist air mass? 1) cold 3) stationary 2) warm 4) occluded 
Physics
Ok I guess the reason why I do not know how to do this problem is because I can not draw the proper freebody diagram... Three blocks on a frictionless horizontal surface are in contact with each other as shown in Fig. 45. A force F is applied to block 1 (mass m1). (a) Draw a... 
Phsyics
Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically. 
Physics
Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically 
chemistry
the number of nonbonding electrons exceeds the number of bonding electrons in the Lewis structure of which of the following molecules? HCN NH3 H2O more than one correct response no correct response if more than one correct response please show all correct responses. thanks 
Physics
scroll all the way to the bottom: lakeheadschools.ca/scvi_staff/brecka/Gr11_physics_web/downloadable_content/unit12/Text12/phys11_12_6.pdf How do you figure out which way the motor will spin (figure 12)? And how do you figure out which way the loop will rotate? And to answer 1... 
math
a boy travels 15 km due north,then goes 9 km due east,then 3km due south.how far is he from his starting point find the distance the boat would have traveled if it had gone directly from point p to point t 
Physics
A block of mass m1 = 4.90 kg sits on top of a second block of mass m2 = 14.5 kg, which in turn is on a horizontal table. The coefficients of friction between the two blocks are µs = 0.300 and µk = 0.100. The coefficients of friction between the lower block and the rough ... 
math
The runway of an airfield faces west. An airplane, flying in the direction of northeast at a height of 2km and at a speed of 400km/h, on a path which passes over a point 3km west of the runway end, is spotted sqrt(29)km horizontally(southwestern quadrant) from the runway end... 
language
I am trying to do a report on the following and can't find any sites that contain info to make report. Looking for various types of humans that have lived on earth since time began. thanks for any help 
Math
A40m deep wellwith radius 3.5m is dug and the earth taken out is evenly spread to form a plat form ofdimensions 28mby 22m. find the height of the platform. 
physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ... 
physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ... 
Physics
What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ... 
physics
four 9.5kg spheres are located at the corners of a square of side 0.60m. calculate the magnitude and direction of the total gravitational force exerted on one sphere by the other three Let s be the side length, so the diagnoal length is s * sqrt2. This is a vector problem. ... 
MATHS MONGU COLLEGE
A cylinder whose volume is 386,000m3 has it's length 1.3 times its diameter. calculate the diameter of the cylinder given that the volume V = 3.142r2h. 
Physics
A box of mass 50.0 kg is connected to a second box with a mass of 54.0 kg. Both are sitting on a horizontal surface and the coefficient of kinetic friction between the surface and each box is 0.51. If the second box is pulled away from the first box with a force of 605.8 N, ... 
Physics
At the centre of a circular ice rink, a 87.0 kg ice skater moving 2.10 m/s north hits and grabs onto a 51.0 kg ice skater who had been traveling west at 5.35 m/s. If the skaters hold onto each other and the rink has a 26.0 m diameter, what is the amount of time for the skaters... 
Physics
At the centre of a circular ice rink, a 67.0 kg ice skater moving 2.00 m/s north hits and grabs onto a 41.0 kg ice skater who had been traveling west at 4.30 m/s. If the skaters hold onto each other and the rink has a 42.0 m diameter, what is the amount of time for the skaters... 
please help physics!!
Two toy ducks attached to each other by a string, are being pulled by a child. The front duck is m1= 5.0 kg and the back duck is m2= 2.0 kg. The happy guy pulls them with a force of 10 N and friction exists. The toys are moving with constant velocity. A) if the coefficient of ... 
Earth Sciences, Geology
What means by 'Gemstone minerals'? Is there any difference between gemstone, minerals and gemstone minerals? 
math
The difference between two numbers is 3. Eight times the larger number is 10 times the smaller number. Write a system of equations describing the given conditions. Then solve the system by the substitution method and find the two numbers. 
Navigation/maths
I am curious to know what "sight reduction tables" are: I assume they give distance and bearing (azimuth) from one known (or assumed)location on the surface of the earth to another to the accuracy of the tables. Please can someone confirm or correct my assumption. Thanks Mike 
chemistry
51. What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth? 71. You have a mixture of salt and sand that must be separated by using physical changes only. Describe what you would do to prepare dry samples of the two constituents... 
Sci.
51. What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth? 71. You have a mixture of salt and sand that must be separated by using physical changes only. Describe what you would do to prepare dry samples of the two constituents... 
science
which two gases have been added to Earth's atmosphere in large amounts and are believed to have increased global warming by absorbing infrared radiation? 1. neon and argon 2. chlorine and nitrogen 3. hydrogen and helium 4. methane and carbon dioxide 
science/planets
Q: What two things does Earth have in common with the outer planets called gas giants? A: A)relative temperatures above freezing B)moons and magnetic field C)fairly long days and short nights D)volcanic activity and geysers 
physics
consider a pair of planets that find the distance between them is decreased by a factoer of 5. Show that the force between them becomes 25 times as strong? 
Physics
consider a pair of planets that find that the distance between then is decreased by a factor of 5. Show that the force between them becomes 25 times as strong. 
Geography
Hi Oprah here Just wanna know what would be a circulating current of warmer materal ( such as magma ) ??? Help please Thanks I'm not quite sure what you are asking. Is the material molten earth, water or something else? Since this is not my area of expertise, I searched Google... 
Physics
A boat is at a point 120km West and 60km South of its destination. It sails in water which has a current of 20km/h North. In order to arrive at the destination, the captain decides to head the boat due east at 50km/h until he reaches a point due South of the destination. He ... 
?
“Invisible Children,” is a documentary filmed by three American college students, Jason Russell, Bobby Bailey, and Laren Pole, who set out for Africa in search for a story; however, they discovered the immense suffering of Acholi civilian population in northern Uganda. For... 
Chemistry
Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant,S , calculate Zeff for these two ions. Repeat this calculation using Slater's rules to estimate the screening constant, S. 
english
separate the sentence with a line between the complete subject and the complete predicate Threefourths of the earth / is covered by water, and most of it is salty ocean water. is the line in this simple sentence correct?? THANKS 
Calculus
Several math students are taking a break from their studies by visiting a playground. One student pushes the others on a merrygoround. The diameter of the merrygoround is 3.0 m, and the student pushes with a force of 50 N along the purple vector shown in the diagram. Merry... 
Circumference and Area of Circles
can someone help me with these:Find the radius, diameter and circumference of a circle with an area of 64 cm2. Write your answers as decimals rounded to the nearest hundredth. Find the circumference and area of a circle that has a rectangle inscribed inside it with sides that ... 
physics
A 1200 kg car is being driven up a 5:0 hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 524 N. A force ~F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on ... 
physics
A 1200 kg car is being driven up a 5:0 hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 524 N. A force ~F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on ...