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.
227,364 results, page 83

Word ProblemIcky
Two sailboats are 9.8 miles apart and sailing toward each other. The larger boat sails 4 miles per hour faster than the smaller boat. The two boats pass each other after 0.7 hour. Find the speed of each boat. I cannot figure out for the life of me how to set this one up. I ... 
Physics
Cn u plz gv explaination 2 d solutions bit by bit in brief? Cz i really dnt understand hw 2 apply d formula 2 solve it when i revise nw.Thnkz. [g=10 m/s^2 ]a particle P of mass m kg on a rough horizontal table. The coefficient of friction between P & the table is 1 /4. The ... 
Physics
Two tiny spheres, one with a charge of 17mc and the other with a charde of +3mc are positioned with the positive charge 14cm above the negative. What is the magnitude and direction of the force on the negative charge? 
Math
An oil refinery is located 1 km north of the north bank of a straight river that is 3 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 8 km east of the refinery. The cost of laying pipe is $500,000/km over land ... 
physics
(a) How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 30.0 cm in diameter to produce an electric field of 1150 N/C just outside the surface of the sphere? (b) what is the electric field at a point 10.0 cm outside the ... 
math
1. Number Sense: write three numbers that are greater than 1,543,000 and less than 1,544,000 2. Put the planets in order from the one closest to the sun to the one farthest from the sun. Earth 93,000,000 Jupiter 483,000,000 Mars 142,000,000 Mercury 36,000,000 Venus 67,000,000 
math
Two sides of a triangle have lengths 8 m and 24 m. The angle between them is increasing at a rate of 0.05 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 135°. Round your answer to two decimal places. So ... 
AED 204
In 200 to 300 words name two other factors that have potential to prevent equality in education. Elaborate on the two you choose. Other than the obvious obstacles of prejudice and discrimination (such asa, boys getting more attention than girls; minorities in poor schools; and... 
Calculus
A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of the cars at that ... 
Physics
This is how the problem starts out: A meter stick is placed with the fulcrum at the 50cm mark. If a 120g mass is placed at the 25cm mark and a 25g mass at the 10cm mark, where should a 500g mass be placed to balance the system? I thought that since the two masses (the ... 
geography
what do you see on the surface of the earth? 
earth
whats limestone used for? 
earth
How does time affect crystals? 
space
how many planets are smaller than earth 
project
save the earth with picture 
9th grade
how earth rotates? 
earth
WHEN DID PRIMORDIAL OCEANS FORM? 
science
explain why earth has a moon 
science
will earth get smaller in the future?if does why? 
science
When is the Earth farthest from the sun? 
science
What do earth`s plates float on? 
algebra
7=T/7 How on earth would I solve this? 
Earth science
What is a relief map? 
science
where on earth is silver found? Thanks! 
science
how does the miners jobs help the earth 
Physics
What's earth's rotation period? 
Africa
What is a deep trench in the earth 
Science
How does Earth have seasons? 
earth
what is the chemical formula of chock? 
science
where does the earth loose energy to ?? 
earth
Explain the Nitrogen Cycle 
earth
how are dunes and canyons related 
earth
a suggestd answer to a question is a what 
earth science
A heterogeneous mixture is a 
Science
How is Earth like a system? 
Science
How is earth like a system? 
earth
What causes sedimentation in the ocean? 
Science
What is the lowest atmosphere on earth? 
Science
Why the earth rotate each 24 hours? 
Kumar
What is the life of earth ? explain and why? 
physics
what is gravitational field of the earth? 
Geography
The study of the earth and its features 
Sciences
Will al earth’s resources last forever? 
Social Studies PLEASE HELP!
1. The first successfully established English colony in North America was (1 point) Plymouth. New York. Jamestown. Santa Fe. 2. Protestants who wanted to reform the Anglican Church were called (1 point) Pilgrims. Puritans. Plymouthians. priests. 3. How did the British get ... 
physics
A test charge (q=5uC) lies between two positive charges: 3cm from a 2uC positive charge, and 2 cm from a 3uC positive charge. Find the force and direction (in newtons) on the test charge. I know I have to use Coulomb's law: so: F = KQ/r^2 = 8.99e9*2e6/.03^2 F = 8.99e9*3e6/.... 
Social Studies(I need websites to do these please)
In 1965, Congress adopted the Voting Rights Act. Describe this act. In your description, explain what led Congress to pass the act, and describe at least two of the act's effects. How has the population of South Carolina changed over the past one hundred years? Explain whether... 
Math
Which of the following dimensions of a circle is always smaller than the other two? a. the circumfrence b. the diameter c. the radius d. it depends on the size of the circle I believe the answer is C 
physical sciences
Imagine a circle with a diameter of 2km.if this represents an atom ,which answer would best represent the nucleus?choose the correct answer:a table tennis ball(diameter;2cm)atennis ball(diameter;7cm)avolley ball(diameter;20cm)a soccer ball(diameter;25cm) 
Enviro Science
4. The Earth's tectonic plates and earthquakes are related because a. most earthquakes take place at or near tectonic boundaries b. during an eruption, the plates slip past one another c. of the measure of energy released by the earthquake, called magnitude d. an earthquake ... 
Physics Classical Mechanics
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 ... 
history
all I need is sequence of events of Earth's history for the Mesozoic and Cenozoic eras. just facts that I could put up. I believe the Mesozoic era was the fist one with humans in it? (IN ORDER PLEAEE) 
Biology
Humans and insects are often said to be the dominant animals on earth. And yet there's only one species of humans and over seven hundred thousand of insects. How would you explain this phenomenon? 
math
the moon travels about 1.42 * 10^7 meters of its orbit in one twentyfour hour period. which of the following is the most reasonable estimate for the distance the moon travels around the earth in 27 days? 
Physics
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 10^3 kg, what is the new altitude it reaches? Take the mass of the Earth to be 5.97 x 10^24 kg ... 
other science checkkk
1.Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.One species preys on the other***. B.The relationship is mutually beneficial. C.They share the same niche. D.One species benefits, while the other is ... 
math
At 1:00 p.m., a car leaves a city and travels north at a rate of 55 mi/h. An hour later, a second car leaves the city and travels south at a rate of 60 mi/hr. At what time will the two cars be 285 miles apart We will be happy to critique your work or thinking. 
Physics
A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left of 10N. The ball at ... 
Engineering skill
anybody here to give me notes to solve this question (A and B are two points on a pipe of diameter 600 mm. the grid reference for the two points are given in the below , together with the elevation of the top of the pipe at these points. A drain pipe is being planned, and P ... 
Physics 1
The drawing shows three particles far away from any other objects and located on a straight line. Particle B is located in the middle of particles A and C. The distance between particles A and B is 0.500 m. The distance between particles B and C is 0.250 m. The masses of these... 
Physics
A ball has a diameter of 3.70 cm and average density of 0.0841 g/cm3. What force is required to hold it completely submerged under water? I need to find the magnitude in N Thank you! 
english
“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... 
Math
Four angles are put together, forming a straight angle. Two of the angles are the same size. The other two angles are also the same size but different from the other two. If one angle of the four angles is 40 degrees, what are the measures of the other three angles 
History
How much does geography affect people's lives? Use what you have learned about culture in the Americas to respond to the prompt. Be sure to cite at least one piece of evidence about each geographic region (middle america, south america, and north america) from the text to ... 
Physics
I did a lab report on gravitation. In the lab, we explored what the relationship is between the distance between two objects and their force of gravity. The independent variable was distance (m) while the dependent variable was force of gravity (N). When I found the slope, I ... 
Math
Jamal and dorothy wete hiking and had a choice between two trails. One was 5 1/3 miles long, and the other was 1 3/4 times as long. How long was the longer trail? 
Ap world
Which modernday territories constitute mesoamerica? a Mexico and central america b central and south america c north and south america d most of mexico and the united states e mexico, the united states , and canada 
physics
A 0.18 kg ball is placed in a shallow wedge with an opening angle of 110° For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. 
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? 
Social Studies
1. The first successfully established English colony in North America was (1 point) Plymouth. New York. Jamestown. Santa Fe. 2. Protestants who wanted to reform the Anglican Church were called (1 point) Pilgrims. Puritans. Plymouthians. priests. 3. How did the British get ... 
Humanities
Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and Reconciliation ... 
Physics 3
A potential energy function for a twodimensional force is of the form U = 3x3y – 7x. Find the force that acts at the point (x, y). 
pysics
a force of 4N at 30 degree from another force 5Nwk is pointing east. find the resistance of the two forces using parallelogram 
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... 
Physics
The 3.0 cmdiameter water line splits into two 1.0cmdiameter 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) 
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. 
Polar coordinates
I need some help on this Calculus question about polar coordinates. Consider a pasture bordering on a straight river. At 2m from the river, a goat is tied to a pole with a 4m long rope. What is the area of grass that the goat can graze? There are a couple ways to set this up, ... 
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? 
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? 
kv
a man travel 3 km north ,3 km east again 1 km north find the final displacement 
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 
Math
Find the exact value of the trigonometric function given that sin u = 5/13 and cos = 3/5 1) sin(uv) 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 ... 
Math
Find the exact value of the trigonometric function given that sin u = 5/13 and cos = 3/5 1) sin(uv) 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 ... 
Physics
In a twodimensional tugofwar, 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 ... 
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 ... 
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? 
physics
two positive points charges of 15c and 13c are placed 12cm apart . find the work done in bringing the two charges 4cm closer. 
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. 
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 ... 
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. 
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... 
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. 
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 reasonsEast Africa lay between the two Britishcontrolled areas of South Africa and Egypt. However, besides ... 
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 BHow much ... 
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? 
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 propdriven transport flying at onefifth 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... 
Algebra
(2n+1)(2n1)(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)(... 
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 ... 
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 ... 
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. 
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