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 68

Chemistry
"There are two ions per formula unit in this compound. The 1 anion has 8 more electrons than the cation." I need to find the Chemical formula/name. Any suggestions on how to start? This can have more than one correct answer. 
physics
n antiaircraft gun fires a 23.7 kg shell with a muzzle speed of 880 m/s. What magnitude propulsive force was necessary to attain the muzzle speed within the 5.05 m barrel? (Assume constant acceleration and neglect the Earth's gravitational effect.) 
geography
1. What is the name of the third largest ocean in the world? The Indian Ocean 2. What is the capital of the People's Democratic Republic of Yemen? Aden 3. What is the equator? The imaginary line that stretches around the Earth separating the Northern and Southern Hemispheres. ... 
PHYSICS(HELP)
A satellite with a mass of ms = 7.00 × 103 kg is in a planet's equatorial plane in a circular "synchronous" orbit. This means that an observer at the equator will see the satellite being stationary overhead (see figure below). The planet has mass mp = 8.59 × 1025 kg and a ... 
math
two trains leave Austin one train going north at 80 mph and one going 60mph how long will it take the two trains to be 420 miles apart? 
PHYSICS HELP
Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earthsun distance:1.50x10^11m Marssun distance: 2.28 x10^11... 
Math
Two ships leave the same port at the same time. One ship sails on a course of 110 degree at 32 mi/h. The other sails on a course of 230 degree at 40 mi/h. Find the distance between them after 2 hours. Express your answer to the nearest mile. 
physics
On a 3 day hike a hiker walks 40 km due south the first day, 30 km at an angle of 40 degrees south of east the second day, and 25 km at an angle of 45 degrees north of west the third day. What is the person's displacement from her original position? 
physics
Mike walks 100 meters north, then walks 30 meters south. After this, he walks another 10 meters north. What is the magnitude of his total displacement during this walk, in meters? 
Physics
A 30m bar with a mass of 20kg is being lifted by a string. The bar makes an angle of 55 degrees above horizontal (between the bar and ground). The string is attached to the ceiling vertically. What is the tension on the string? What is the normal force given by the bar on the ... 
Physics net force and mass
Four boxes of various masses are placed on a friction free table. Rank these boxes according to net force by listing them in order from greatest to least. A) <5N 5 kg 10N> B) <10N10kg15N> C) <10N5kg15N> D) <5N20kg15N> ... 
Calculus
Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth? 
physics
You are designing a hydraulic lift for an automobile garage. It will consist of two oilfilled cylindrical pipes of different diameters. A worker pushes down on a piston at one end, raising the car on a platform at the other end. To handle a full range of jobs, you must be ... 
physics
In designing rotating space stations to provide for artificialgravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ... 
physics
In designing rotating space stations to provide for artificialgravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ... 
SCIENCE
The intensity of solar radiation at the surface of the earth is 1kW/m2 . A roof has a square solar panel of sides 10m that absorbs the radiation completely. What is the average force exerted on the panel? 
Physics
Three equal charge Q each are place in the vertices of an equilateral triangle of side a.What is the resultant force on any one charge due to the other two? 
MATH
The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1 second. c) What is the ... 
physics
Given the following forces acting on an object find the net force: 2.0N[N], 10N[S], 2.0N[W], 8.0N[E] The mass is 5.1 kg with the net force find the objects acceleration 
science
Circle the letter of each sentencethat is true about deep currents. a. they can be thought of as a global conveyer belt. b.it takes them about ten years to flow from the pole to the equator and back. c. they transfer heat through the ocean d. they bring dissolved oxygen down ... 
physics
Search: the ratio of the inlet pistol force and outlet pistol force is 2:7.calculate the diameter of the inlet pistol if the radius of pistol one is 15cm 
Geometry
Find the distance between points (2,1) and (1,5) When finding the distance between these 2 points would you subtract 1(2) or 21? The same question with the other one as well. 
Geometry
Find the distance between points (2,1) and (1,5) When finding the distance between these 2 points would you subtract 1(2) or 21? The same question with the other one as well. 
Science
1. Describe how the magma is generated for volcanoes parallel to a subduction zone. 2. What two factors result in a volcano at a plate boundary? 3. Why are volcanoes found at midocean ridges but not at ocean trenches? 4. What causes a hot spot in the mantle? 5. Explain why ... 
Physics
A combination lock has a 1.2 cm diameter knob that is part of the dial you turn to unlock the lock. To turn that knob, you grip it between your thumb and forefinger with a force of 0.62 N as you twist your wrist. Suppose the coefficient of static friction between the knob and... 
Physics
A combination lock has a 1.2 cm diameter knob that is part of the dial you turn to unlock the lock. To turn that knob, you grip it between your thumb and forefinger with a force of 0.62 N as you twist your wrist. Suppose the coefficient of static friction between the knob and... 
Algebra
Two hikers are 22 miles apart and walking toward each other. They meet in 5 hours. Find the rate of each hiker if one hiker walks 2.2 mph faster than the other. 
MATH
Imagine that the grid lines on a coordinate grid are streets and that the distance between two points must be measured by the number of “blocks” a taxicab would have to travel horizontally and vertically to get from one point to the other. The sum of the horizontal and ... 
physics
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at 21m/s . The third piece has twice the mass as the other two. What is the speed of the third piece? What is the direction of the ... 
Math
Consider a die with 8 sides, marked one, two, three, and so on. assuming equally likely outcome, find the probability that the sum of two dice is the given number. If p(10)= 
maths
To fill a swimming pool two pipes are to be used.If the pipe of larger diameter I'd used for 4 hours and the pipe of smaller diameter for 9 hours only half the pool can be filled .Find ,how long it would take for each pipe to fill the tank separately, if the pipe of smaller ... 
Physics
The gravitational force between two masses is 500N. What is the gravitational force if the masses are doubled and distance between them is likewise doubled? What formula/s should I use? 
maths
A monkey ascends a greased pole 30 m. high. He ascends 3 m. in Ist minute and descends 1m. in the next minute, again ascends 3m. in 3rd minute, but descends 1m. in 4th min and so on. In what time he reached the top? 
maths
A monkey ascends a greased pole 30 m. high. He ascends 3 m. in Ist minute and descends 1m. in the next minute, again ascends 3m. in 3rd minute, but descends 1m. in 4th min and so on. In what time he reached the top? 
trigonometry
assuming that Earth's radius is 6400 km, find the linear velocity of Quito, Equador, a city on the equator. (Use pi=3.1416 and 1.6 km=1 mile). 
Physics. I'd appreciate your help.
A 33N force acing due north and a 44N force acting at 30 degrees act concurrently on point P. What is the magnitude and direction of a third force that produces equilibrium at point P? 
Maths
Solve the equation 12xcube8xsquare+kx+18=0 and find the value of k given that one root is negative of other 
English, pls help ASAP!!
MY answers are below the poems, pls check them for me!!!! Match the category of poetry with the except or poem A. Poetry of place B. Poetry of spirit C. Poetry of nature D. Poetry of family think it is (in order): Poetry of Nature, Poetry of Place, Poetry of Spirit, and Poetry... 
physics
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at 25 m/s. The third piece has twice the mass as the other two. 1. What is the speed of the third piece? 2. What is the direction of ... 
Social studies
I need to find on a map the north middle latitude and the south middle latitude 
math
1. Two children balance a seesaw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect the mass of the seesaw) 
math
1. Two children balance a seesaw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect the mass of the seesaw) 
math
1. Two children balance a seesaw in horizontal equilibrium. One weighs 80 lb. and the other weighs 60 lb. and is sitting 4ft. from the fulcrum. Find the force the fulcrum applies to the beam and the distance to the fulcrum to the 80 lb. child. (Neglect the mass of the seesaw) 
chemistry
A NASA satellite showed that in 2003 the ozone hole was much larger than it was in 2002. The 2003 hole measured 1.04 x 107 mi2 in diameter, while the diameter of the 2002 hole was 6.9 x 106 mi2 Calculate the difference in size between the two holes in square meters. 
Physics
A the start of the war, the South's basic strategy could be summarized as a. prepare and wait b. rely on railroads c. blockade the North d. invade and attack i think A but im not sure One example of government's trying to help American business was a. high tariffs b. patronage... 
Nfl
The Detroit lions will cruise to their game by sailing north on the  river across lake   Up the   river across lake  through the straits of  a Ross the north end of lake  around the tip of the door peninsula and south into green bay 
English
1. We have two groups. One is a Chinese group and the other is a Japanese group. 2. We have two groups. One group is from China, and the other group is from Japan. 3. We have two groups. One is for young people, and the other is for old people. 4. We have two groups. One group... 
Physics
On the earth, you throw an object up in the air at some velocity, v, and it reaches a maximum vertical displacement (max. height if you prefer) of 4.8 meters. If you went to the moon, where the value of the gravitational acceleration of the moon is 1/6 of that on earth, and ... 
American History
Which statement below summarizes President Richard Nixon’s policy of Vietnamization. A. Train the South Vietnamese so America can slowly withdraw its troops B.Order an immediate removal of Americans from Vietnam. c. Meet with the North Vietnamese and negotiate peaceful ... 
geography
how many miles , in north to south , are the temperate zones? 
ss
How was the north and south different in the uncle Tom's cabin? 
s.s.
The large movement of African Americans from the south to the north. 
Social Studies
How was the South so much industrial than the North? 
history
How did the wartime economies of the North and South compare? 
Math
Thomas puts fence posts from one end of a field to the other, equal distance apart. There are 287 posts. Width of each post is 10 cm. Distance between two posts is 30 meters. Find Length of fence. 
physics
What does it mean to say the Coulomb Force is a conservative force? This is what I have compiled, but I still feel like I'm missing something. A conservative force is one in which energy cannot be created nor destroyed, and with the property that the work done in moving a ... 
geometry
If I am given the circumference(2368) how can I find the diameter and the radius? 
geometry
If I am given the circumference(2368) how can I find the diameter and the radius? Can you help? 
Physics help
I'm preparing for a test. Can anyone check my answer for all these questions? These are my questions: 1. A stationary curling stone is struck in a glancing collision by a second curling stone of equal mass. If the first stone moves away at a velocity of 0.92 m/s [N71oW] and ... 
Chemistry *Urgent*
The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A Seriously can't an f orbital hold 14 electrons? 
college
At the center of a 50 m diameter circular ice rink, a 75 kg skater traveling north at 2.5 m/s collides with and holds onto a 60 kg skater who had been heading west at 3.5 m/s. How long will it take them to get to the edge of the rink. Where will the reach it. Give your answer ... 
Science
What are tides and how are they caused? Tides are the alternate rises and falls of large bodies of water. They are caused by the gravitational interaction between the Earth and the Moon. Please correct me if I'm wrong, thanks 
Astronomy
You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun): (Points : 10) 
Physical Science
The polar circumference of Earth is 40,000km. What distance corresponds to a change of one degree of latitude? A change of one one arcminute of latitude? Hint, an arcminute is 1/60th of a degree. 
Calc
Three students have ordered a 14 inch diameter pizza. They slice it with 2 parallel cuts, giving them 3 pieces with equal area. The two cuts are equidistant from the center of the pizza. Find the horizontal distance between one cut and the center of the pizza. I figured the ... 
Physics
In a pulley system, can the force of friction equal the tension in the rope? Let's say there is a mass on a table connected to a pulley system (placed at the corner of the table), while the other mass hangs from the table ... can the force of friction equal the tension? ... 
geology(science) does this sound ok?
write a 200300 word description of how these four subsystems interact with one another. In your response, identify one type of resource from each subsystem on which people depend. this is what i said..... The earths 4 subsystems are the following lithosphere, hydrosphere, ... 
English  Native speakers
Hello once again! Can you tell me the difference between Don't underestimate me! and Don't underrate me! Which one is more used in English and what's the difference between those two words? Is there any other similar word? My second question. Can we say both I'm Croatian and I... 
trigonometry
How do i do them? :l 7. At 2:00 P.M., the angle between the hour and minute hands on a clock is 60° (approximately 1.05 radians). The arc length formed by the two hands is 2.63 inches. What is the radius of the clock in inches? (Round to the nearest tenth.) 10. A pulley with ... 
Science
Which of the following shows fossils as evidence of continental drift? A. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in Scotland's highlands B. Mesosaursus, an ancient reptile, had been discovered in South America and ... 
Alegebra 1
If all the vertices of a triangle are on the circle and one side of the triangle is the diameter of the circle it is a right angle. Find the length of the diameter (AC) if Ab =8 and BC = 15. 
math
At the rectangular intersection of two streets, the crosswalks are 60 feet from north to south, and 80 feet from west to east. If a diagonal crosswalk was installed, how many fewer feet would a person have to walk to get from the NW corner to the SE corner? 
physics
Two friends, Al and Jo, have a combined mass of 171 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart, because they are holding each other. When they ... 
Calculus
Two ships leave the same port at noon. Ship A sails north at 22 mph, and ship B sails east at 12 mph. How fast is the distance between them changing at 1 p.m.? (Round your answer to one decimal place.) 
Calculus
Two ships leave the same port at noon. Ship A sails north at 12 mph, and ship B sails east at 19 mph. How fast is the distance between them changing at 1 p.m.? (Round your answer to one decimal place.) 
Math
let AB and CD be perpendicular diameters of a circle. two chords AE and AF, which lie in the two different semicircles determined by the diameter AB are cut by the diameter CD in the points X and Y respectively. prove that angle EXF = angle EYF 
physics
How far from the center of the earth must a person be to experience acceleration due to gravity that is one half the acceleration at the surface? 
physics
Find the minimum diameter of a 51.5mlong nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·10^8 N/m2 physics  bobpursley, Saturday, October 29, 2011 at 10:32am Hookes Law: elongation= force... 
physics
Two dogs are fighting over a stuffed animal. One pulls to the right with a force of 88 N at 18° above the horizontal. The other pulls down and to the left with a force of 74 N at 12° below the horizontal. Ignoring the weight of the toy, if the total work on the animal ... 
physics
A tennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 52 m/s (about 117 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same speed (52 m/s). As ... 
Math
A yacht is moving at 10kmh in a south easterly direction and encounters a 3kmh current from the north. Find the actual speed and direction of the yacht. 
maths
a yacht is moving at 10km/h in a south easterly direction and encounters a 3km/h current from the north. find the actual speed and direction of the yacht 
Physics
A force of 3.00 N acts through a distance of 12m in the direction of the force.Find the work done. Work=force*distance*CosTheta where theta is the angle between force and distance. 
Calculus
i was just wondering if there was a difference between infinty and indetrminant. my freind said there the same thing. But i thought that for example if you are given a limit for a function, by direct subsitution you find that answer is infity. the conclusion would be that the ... 
Calculus
i was just wondering if there was a difference between infinty and indetrminant. my freind said there the same thing. But i thought that for example if you are given a limit for a function, by direct subsitution you find that answer is infity. the conclusion would be that the ... 
Physics (Normal Force)
When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table to exert just the ... 
Physics
Any help pleeeze!! I'm totally lost on these!! 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.31. Find ... 
univphys
Two objects attract each other gravitationally with a force of 2.5×10^10N when they are 0.22m apart. Their total mass is 4.50kg. Find their individual masses. 
Physics
1. 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 ... 
Chemistry
How can you find out how many unpaired electrons are present in gaseous Co3+ ion in its ground state? According to the NBS Circular 467 "Atomic Energy Leves", Co(3+) has 24 electrons with structure 1s(2), 2s(2), 2p(6),3s(2), 3p(6), 3d(6), and spectroscopic designation 5D4. (... 
math
A ship is 400 miles directly north of the tahiti and is sailing south at 20mi/hr. another ship is 300 miles east of tahiti and is sailing west at 15mi/hr. at what rate is the distance between the ships changing? 
Physics
A 2.03 kg mass is observed to accelerate at 8.82 m/s2 in a direction 28.8° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object? 
physicssss
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object? 
physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object? 
physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object? 
physics
A 0.69 kg mass is observed to accelerate at 8.16 m/s2 in a direction 30.5° north of east. There is a force directed north acting on the object and a force directed east acting on the object. What is the magnitude of the force acting east on the object? 
Earth Science
can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please help 
Geography
1)The study of geography includes a)living in a dessert b)growing food c)predicting the weather d)studying people e) wearing protective clothing 2) which of the following country has no seaport a) Egypt b)Algeria c)Nigeria d)South Africa e)Uganda 3)about how many kilometers ... 
English
1. In America, when they show the temperature, people use Farenheit. However, in our country, we use Celsius. 2. New Zealand is composed of the South Island and the North Island. It rains a lot in July and August in the mountainsides in the South Island.  Are the ... 
Math
6. The boxandwhisker plot below shows the numbers of text messages received in one day by students in he seventh and eighth grades at Lincoln Middle School. a) Describe the overlap of the two sets of data. b) Find the IQR of each set. c) Find the difference between the ...