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 74

8th grade
the distance of a region north or south of the equater in degrees is called? 
7th grade
do monsoons affect the climates of both north and south korea? 
physics
If you move 10 km North, 10 km East, and 10 km South, a) What is your displacement? b) What is the total distance you traveled? 
Someone good is History!!!!!!
What effect did the Emancipation Proclamation have on the North and South? 
World History (Ms. Sue)
In what ways was racism common in both the North and the South? 
Social Studies
Where is Fishers located in Indiana? Central, North, or South side? 
U.S history\
how did the south atlantic slave trade not change north american colonies 
physics
A man walked 10 m north, then 5 m south. What distance did he walk? What is his final displacement? 
Social Studies
How were the lives of white people in the North and the South alike and different? 
social studies
how were the lives of white people in the north and south alike and different 
physics mc question!!!!HELP
Question # 1 : It a particle increases its speed by a factor of 2, what happens to the kinetic energy? a)doubles b)cuts in half c)increases by a factor of 4 d)depends on whether or not work is done on the particle Question # 2: An object falling near the surface of the Earth a... 
Language
People have been making maps for hundreds of years. Christopher Columbus used maps when he sailed to the "New World." At that time, most people thought Earth was flat, and all of the maps they used were flat, too. Of course, Columbus's maps were not accurate, but would you be ... 
applied mechanics
A solid shaft of 65mm outside diameter and a hollow shaft of 85mm outside diameter are connected by 6 bolts with the mean pitch of thread being 155mm. The shear stress due to the torque on the shafts is equal to the shear stress on the bolts. a) Find the diameter of the bolts... 
physics
The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q1 = +8.50 Ã‚ÂµC; the other two have identical magnitudes, but opposite signs: q2 = 5.50 Ã‚ÂµC and q3 = 5.5 Ã‚ÂµC. (a) Determine the net force (magnitude ... 
applied mechanics
A solid shaft of 65mm outside diameter and a hollow shaft of 85mm outside diameter are connected by 6 bolts with the mean pitch of thread being 155mm. The shear stress due to the torque on the shafts is equal to the shear stress on the bolts. a) Find the diameter of the bolts... 
Physics
A solid shaft of 65mm outside diameter and a hollow shaft of 85mm outside diameter are connected by 6 bolts with the mean pitch of thread being 155mm. The shear stress due to the torque on the shafts is equal to the shear stress on the bolts. a) Find the diameter of the bolts... 
Physics
A wasp accumulates 1.0x10^14C of charge while flying perpendicular to the earth's magnetic field of 4.0X10^5T. How fast is the wasp flying if the magnetic force acting on it is 3.0x 10^16N? 
Weight Is Force! Science
A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet? 
Physics
A uniform 4m plank with a mass of 45 kg is supported at its ends by two ladders. Two 75 kg men are standing on the plank. One is 1 m from one end and the other is 1.5 m from the other end. Determine the forces exerted by the ladders. 
Math
Two round fountains are similar. One measures 7'6" across and the other measures 14'11" across. Find the scale factor from the small one to the large one. 
geometry
two round fountains are similar. one measures 4'6 across and the other measures 9'7 across. find the scale factor from the small one to the large one 
physics
A 400.0mwide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing directly opposite at point ... 
Physics
A 400.0mwide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing directly opposite at point ... 
Math
Find two quadratic functions, one that opens upward and one that opens downward, whose graphs have the given xintercepts. (3, 0), (1/2, 0) 
physics multiple choice
1. Two forces are applied to a box on a frictionless surface. One force is 40 N [S]. The second force is 70 N [N30ºW]. What is the overall net force? a) 40.6 N [S59.5ºE] b) 110 N c) 40.6 N [N59.5ºW] d) 40.6 N [S30.5ºW] 2. When drawing free body diagrapms, it is important ... 
physic
A solid shaft of 65mm outside diameter and a hollow shaft of 85mm outside diameter are connected by 6 bolts with the mean pitch of thread being 155mm. The shear stress due to the torque on the shafts is equal to the shear stress on the bolts. a) Find the diameter of the bolts... 
Physics
Calculate the effective value of g, the acceleration of gravity, at 6400m , above the Earth's surface. Calculate the effective value of g , the acceleration of gravity, at 6200km , above the Earth's surface 
earth
Atmosphere Homework! 1.Which of the following layers of the atmosphere is closest to space? 2.A barometer measures? 3. The atmosphere contains tiny solid particles called what? 4.The process by which the atmosphere slows Earth's loss of heat to space is called the ..? 5.Almost... 
Social Studies Helppp
In 1832, South Carolina warned the federal government not to use force to impose the tariffs of 1828 and 1832. If it did, South Carolina threatened to _____. 
Physics
A current of a river flows steadily from west to east at 1.00 m/s. A boat in the river travels at 3.00 m/s relative to the water. The river is 20.0 m wide with parallel banks. The boat leaves the shore at point A, and point B is directly across the river from that point. 1) At... 
physics
Two flat slides of glass are separated at one edge by a thin wire, as shown below. The top surface of the upper slide and the bottom surface of the lower slide have special coatings on them so that they reflect no light. The system is illuminated with light of wavelength 550 ... 
physics
There is motion of a straight track between two stations. Average speed: 12m/s Distance between stations: 3600m. Please help how could I find the max speed given these information? and it isn't like the average speed so it confused me 
physics
Two objects, with masses m1 and m2, are originally a distance r apart. The gravitational force between them has a magnitude F. The second object has its mass changed to 4m2, and the distance is changed to r/7. What is the ratio between the magnitude of the new gravitational ... 
Physics
What is the work required to raise a 10. kg object from the surface of the Earth to a height of 2.0 m? 5.0 J 20. J 2.0 E2 J 2.0 E3 J My answer was 20. J but this was wrong. Is the answer 2.0 E2 J? A net force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The ... 
Calc 2
The figure shows a semicircle with radius 1, horizontal diameter PQ, and tangent lines at P and Q. At what height above the diameter should the horizontal line be placed so as to minimize the shaded area? I would post the figure but the website is not allowing it. I've tried ... 
PreCalculusTrig
Two trains depart simultaneously from the same station. The angle between the two tracks on which they leave is 120 degrees. One train travels at an average speed of 45 mph and the other at 70 mph. How far apart are the trains after three hours? 
chemistry
for an oxygen atom,wich requeres more energy,the addition of two electrons or the removal of one electron?explain why 
s.c.s
two unequal forces acting on a point at a angle of 150 degree. which is perpendicular is smaller force the larger force is 24 N. find the smaller and resultant force. 
Math
A pole that is 3.2m tall casts a shadow that is 1.4m long. At the same time, a nearby tower casts a shadow that is 39.5m long. How tall is the tower? Round your answer to the nearest meter. 
MATH HELP PLEASE. IM LOST
Given one side of a golden rectangle is 3.7 inches, find the possible lengths of the other side. Notice that the other side can be either longer or shorter than 3.7 inches. Round your answers to the nearest tenth and useGreek Phi normal.svg=1.618. 
physics
calculate the redshift gh/c^2 if h is the distance from the ground to a satellite in lowEarth orbit, 300km. Suppose the "light" is actually a radio wave with a frequency of 10^11 Hz. How many cycles would the transmitter emit if it ran for one day? How many fewer would be ... 
english fixed3
here's what i did for number 4. The world is deserting because we are taking water for granted. If people continue to waste water, the earth’s structure will change and it will be the main cause of earthquake and potentially a tsunami. and for number 5. 5. People prefer to ... 
science
which type of eclipse would you expect to see if the moon passes directly between earth and the sun? a) a solar eclipse b) a lunar eclipse c) a total lunar eclipse d) a penumbra 
Physics  Hellp Really Stuck!
1. A 0.20 kg object moves at a constant speed in a horizontal circular path of radius "r" while suspended from the top of a pole by a string of length 1.2 m. It makes an angle of 62 degrees with the horizontal. What is the speed of this object? 2. An object of mass 3 kg is ... 
Physics  Electrons (Inside the atom)
A beam of electrons is directed into uniform electric and magnetic feilds that are at right angles to one another and to the beam direction. The strength of the magnetic feild is 55 mT; the electric feild strength is adjusted to 600 kV m^1 when the beam passed through the ... 
summer math hw
one circle has a diameter of 10 inches. a second circle has a diameter that is twice the diameter of the first circle What is the ratio of the area of the smaller circle to the larger circle 
College Physics
Now we also know that the charge on a pair of parallel plates is proportional to the potential difference V, namely q=CV. We also know that the capacitance of two parallel plates is given by C=ε0A/d, where ε0=8.85×1012 is the permittivity of free space and d is the... 
Physics
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered my answer: c 2. Which is true a) the ... 
Science
Two tugboats are towing a ship. Each exerts a horizontal force of 5 tons and the angle between their towropes is 90°. What net force is exerted on the ship? 
geometry
At the beginning of a run on a road that goes due north, Hayden noticed that she was 4 kilometers south of a dead douglas fir. If the midpoint of her jog was 7 kilometers north of the dead douglas fir, how far did Hayden have to travel? thanks :] 
Ms. Sue Please Check My Answers!
1. During the early 1800s, what did New England's textile industry and cotton farming in the South have in common? A.) Changes in technology led to increased production in both regions B.) Children worked in the textile industry; slaves of all ages worked in the South C.) New ... 
Physics11th grade
Two students on roller skates stand facetoface, then push each other away. One student has a mass of 94 kg, the other 65 kg. Find the ratio of the velocities just after the hands lose contact. 
physics
Physics Gravitation help...? hello People i need some help with my physics revision sheet. i cant seem to get my head round it. if anyone could help by telling me how to work it out to get the right answer i would be grateful... answers would also be appreciated. ok here is ... 
physics
The route followed by a hiker consists of three displacement vectors , , and . Vector is along a measured trail and is 1060 m in a direction 20.0 ° north of east. Vector is not along a measured trail, but the hiker uses a compass and knows that the direction is 35.0 ° east ... 
U.S history slavery in the colonial south
"how did the increasing complexity of the colonial south change the relationships between rich, and poor,black, red, and white, free and unfree? 
science
A scientist experiments on two different pairs of objects. During the experiment, the objects in one of the pairs are brought into contact with each other; the objects in the other pair are brought close together, but they do not touch. The scientist then compares the number ... 
Physical Geography, Earth Science
Who were the four other major contributors to the development of modern astronomy after Copernicus? Explain what those contributions were. Finally, why did it take so long for the geocentric view of the universe to be overthrown and what does that tell us about scientific ... 
Physics
Using symmetry arguments, determine the direction of the force on q = +1.00 µC in Figure 17.33, given that qa = qb = +7.00 µC and qc = qd = 7.00 µC. Calculate the magnitude of the force on the charge q, given that the square is 10.0 cm on a side. 
Accounting
I am trying to tell the difference between trade credit and opportunity costs, but now liking what I find on the internet. Is there a link that shows both? I could not find one. In order to do my assignment I need to compaire the two so I could figure out how opportunity costs... 
physics mechanical energy
A skateboarder with mass ms = 42 kg is standing at the top of a ramp which is hy = 3.7 m above the ground. The skateboarder then jumps on his skateboard and descends down the ramp. His speed at the bottom of the ramp is vf = 6.3 m/s. Write an expression for the work, Wf, done ... 
Geo (locus)
I don't fully get this stuff but some of these I guessed on and some I think I;m close so will someone check/ help me please? * is the answer I put 1. Point A is 0.5 cm from j. k and k are parallel and 1 cm apart. Find the locus of points that are 0.75 cm from A and ... 
Physics
suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem? 
Chemistry
An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1? 2 ev 4 ev 8 ev 12 ev What is the best description of the ... 
Physics
The figure below shows two pint charges, each of 2Q, fixed on the yaxis at y = +a and at y = a . A third points charge Q is placed on the xaxis at x = 2a . Express all algebraic answers in terms of Q, a, and fundamental constants. (a) What is the net force (magnitude and ... 
math
3. The height H of an object t seconds after it is propelled upward with an initial velocity v is represented by , where g is the gravitational pull and h is the initial height. The gravitational pull of the moon is 1.6 meters per second squared. The gravitational pull of ... 
Science
Please check my answers? My textbook won't load, so i've had to use google and guess. 1. Scientists hypothesize that the sun formed ____. (1 point) less than a billion years ago **from a cloud of gas and dust less than a million years ago from a chunk of Jupiter 2. Two of the ... 
Physics
Two trains, each having a speed of s, are headed at each other on the same straight track. A bird that can fly at speed 2s flies off the front of one train when they are d apart and heads directly for the other train. On reaching the other train it flies directly back to the ... 
Physics
Two cylinders having weights of 100 kN and 200 kN with radii of 100 mm and 200 mm are placed with heavier weight above the lighter weight and both of them are placed in a container having a width of 500 mm. Assuming that the length of the container and cylinder to be the same... 
physics
Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets ... 
physics
Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets ... 
physics
Steel expands 11 parts in a million for each 1 degree C change. Consider a 40,000 km steel pipe that forms a ring to fit snugly all around the circumference of the Earth. Suppose people along its length breathe on it so as to raise its temperature 0.80 degree C. The pipe gets ... 
Physics
1. Two objects suspended by insulating strings attract each other due to static electricity? a) are they neccessarily oppositely charged? b) After they are allowed to touch, they continue to attract and need to be pulled away from each other by the strings. Is it possible that... 
chemistry
What kind intermolecular force do you expect in the following substance? 1. Hydrogen iodide 2. Kryptone 1. strong, due to polarity of the electrostatic bond in HI 2. Weak, due to the complete electron shells of Kr. It does not easily acquire or lose electrons, and its ... 
physics 2
A charge of 6.8 microCoulombs is placed at x = 0, y = 0. A charge of 18.5 microCoulombs is placed at x = 0, y = +37 cm. Another charge of 12.9 microCoulombs is placed at x = +17 cm, y = 0 cm. What is the angle the total electric force on the charge at x = +17 cm, y = 0 ... 
University Earth Sciences
What would happen if a planet's gravity drops? "Living things grow taller" "You can jump higher" Those are not answers I looking for, what I wanna know is if the centre pulling force of a planet is dropping, what would happen to it's mantle, plates, as well as the atmosphere? 
maths
Given that√2 is the root of cubic polynomial 6x3 + 2x210x 4√2 find the other two roots 
maths
If two matrices are known and are inverse of each other.How can we use these matrices to find the point of intersections for the given set of 3D planes? Kindly help 
math
A number is divided into two parts such that one part is 10 more than the other. If the two parts are in the ratio 5:3. Find the number and the two parts 
math
a number is divided into two parts such that one part is 10 more than the other. if the two parts are in the ratio 5:3,find the number and the two parts? 
physics helppp!
The coeffcient of friction between the 7.9 kg mass and the table is 0.55, and the coeffcient of friction between the 5 kg mass and the table is 0.38. Consider the motion of the 37 kg mass which descends by the amount of y = 0.45m after releasing the system from rest. The ... 
3rd grade science
Solar System Project: I would like to know if the moon is between earth and mars. I am making a shoe box model of the solar system. I have to put the planets in order. That's all I need to know. Thanks a bunch!!! 
Geography
24. The South African government changed its policy of apartheid in 1990 and 1991 because of a. the policy's failure to eliminate racial discrimination b. promises of economic aid from major industrial nations c. international sanctions and an increase in protests by black ... 
geometry
A tower casts a shadow of 64 feet. A 6foot tall pole near the tower casta a shadow 8 feet long. How tall is the tower. 
Science
1. The line on the graph below represents an object that is: A: Moving at a constant speed B: Increasing its speed C: Decreasing it's speed D: Not moving at all 2. To determine the acceleration of an object moving in a straight line, you must calculate the change in its speed ... 
math
The numbers 110 are placed on cards, and the cards are put in a hat. If two cards are drawn, in order, without replacement, what is the probability that one number is even and the other a prime? I know there are 4 primes2,3,5,7 and 5 even numbers 2,4,6,8,10 not sure how to ... 
history
Okay, let me get this straight. In the American Civi War, the North was called the Union, the Yankees, or the Rebels, and the South was called the Confederate or the federals? Not quite. North = Union, Yankees, federals South = Confederates, rebels I thought the conFEDERAtes ... 
physics
The speed of sound in air is approximately 340 m/s. The speed of sound in steel is approximately 5900 m/s. If your friend strikes one end of a steel pipe with a hammer while you listen at the other end, you will hear two distinct sounds: one traveling through the air and the ... 
physics
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 1011 m. Determine the magnitude of the electron's ... 
Physics
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 1011 m. Determine the magnitude of the electron's ... 
Physics
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 1011 m. Determine the magnitude of the electron's ... 
Physics
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the two naturally occurring electrons is removed. The radius of the orbit is 2.65 1011 m. Determine the magnitude of the electron's ... 
Astronomy
1. What size are most exosolar planets that have been detected? A. Small like the moon B. Same size as earth C. More massive than Jupiter D. More massive than the sun 2. Which NASA space mission, launched in 2009, has the goal of determining if planets like earth are rare or ... 
physics
The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q1 = +8.70 µC; the other two charges have identical magnitudes, but opposite signs: q2 = 4.50 µC and q3 = +4.50 µC. Determine the net force (magnitude and direction) ... 
physics
The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q1 = +8.70 µC; the other two charges have identical magnitudes, but opposite signs: q2 = 4.50 µC and q3 = +4.50 µC. Determine the net force (magnitude and direction) ... 
Physics
A synchrotron radiation facility consists of a circular ring that has a 48.0 m radius and creates an electron beam with a current of 497 mA when the electrons have a speed approximately equal to the speed of light. How many electrons pass a given point in the accelerator per ... 
11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=q 
11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=q Thanks 
11th grade physics
Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=q 
physics
two forces are applied to a 40kg object. one force is 50N and the other is 60N. if the forces are perpendicular to another, what will the resultant acceleration of the object be? 
physical science
If the earth had twice its present radius and twice its present mass, what would happen to your weight? Explain. What is the relationship between the radius (R) of orbit of a satellite and its period (T)?