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 46

math
there are two 1's,two 2's,and two 3's.There is one digit between the two 1's, there are two digits between the two 2's, and there are three digits between the two 3's. Holding number cards,can you duplicate this sequence of numbers? 
Astronomy
The volume of a ball is given in terms of its radius by V=4π3R3. Use this to find the average density of Saturn, i.e. the mass per unit volume. Use Earth’s mass in kg from the Table of Constants to express your answer in kgm3. Note for comparison that water has a ... 
physics
pls explain to me how you add 65km{North 85 degreesWest], 3500m[South 10 West}, 6000m{East 70 degrees South], 54km[North 60 degrees East]. pls explain to me how i should add these vectors. I really need help. pls help 
Calc
A spherical snowball is placed in the sun. The snowball melts so that it's surface area decreases at a rate of 2 cm2 /min. Find the rate at which the diameter decreases when the diameter is 8 cm. 
calculus
A spherical snowball is placed in the sun. The snowball melts so that it's surface area decreases at a rate of 2 cm2 /min. Find the rate at which the diameter decreases when the diameter is 8 cm 
Physics
Two boxes of mass 7.40 and 7.00 kg are in contact and are accelerated across a horizontal surface by an force of 51.49 N applied parallel to the surface and pushing on the lighter box. The magnitude of the frictional force between the surface and the lighter mass is 9.26 N and... 
Chemistry
Hi, This is one of my chem hw problems. Does anyone have links to websites that might help me solve this..or equations? It sounds like there are two parts to the question but I'm not sure. Volts and Joules? 1. Electrons are used to determine the structure of crystal surfaces. ... 
science
how is the air we breath today different from 3.6 billion years ago? http://en.wikipedia.org/wiki/Earth's_atmosphere#Evolution_of_the_Earth.27s_atmosphere http://eesc.columbia.edu/courses/ees/climate/lectures/earth.html 
PHYSICS
Two crates , one with mass 4.00 kg and the other with 6.00 kg, sit on the frictionless surface of a frozen pond, connected by a light rope. Awoman wearing golf shoes(so she can get traction on the ice)pulls horizontally on the 6.00kg crate with a force F that gives the crate ... 
Science
Two south poles or two north poles are called... 
Math Please Help
Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function 𝑑(𝑡) = 𝑡 3 − 9𝑡 2 + 6𝑡, where North is positive and South is negative. Time elapsed after the start of ... 
PHYSICS
(#1) If two pith balls  one which is neutral and another which has a charge of 9.6 uC (microCoulombs)  are touched together, how many extra electrons will each ball have? (#2) Charge q1 = 6 uC is at the origin, charge q2 = 7 uC is at y = 2m, x = 0, charge q3 = 1.5 uC is at... 
earth science
The Mororovicic Discontinuity marks the change in rock density and elasticity between the: 
5th grade science
What is the continous movement of water between Earth's surface and the air? 
Earth Science
Is there a direct relationship between the eccentricity of its orbit and the distance a planet is from the sun? 
miami dade
a student designed an experiment to demonstrate the interactions between earth systems 
algerbra
sasha researched the size of zoos in her state. she found that the zoo in the north part of the state is almost twice as large as the zoo in the south. she also found that the zoo in the south part of the state has 200 fewer than twice the number of animals as the northern zoo... 
Global Studies
Although the Amazon Basin receives more than 80 inches of rain per year, South America also has the driest place on Earth, know as a. Death valley b. Gobi desert c. Atacama desert*** d. the Caribbean 
physics
work is being done when a force: a) is exerted while pulling a wagon up a hill b) acts vertically on a cart that can only move horizontally c) is exerted by one team in a tugofwar when there is no movement d) of gravitational attraction acts on a person standing on the ... 
Please Please HelpPhysics
I am having trouble figuring out this question: Part 1: A long staight wire carries a current due East. This wire creates, at point #1, a magnetic field that is derected at 40 deg below due South. From point #1, the wire is located: 50 deg below due North 50 deg below due ... 
Chemistry
What properties differ between the elements in the akali metals and the elements in the akaline earth metals? The akali metals have a charge of 1+, and the akaline earth metals have a charge of 2+. 
physics
two equal masses of 5kg are placed on two vertex of an an equilateral triangle and 20 kg mass on the third.each side is 20 cm long. find the force acting on 1 kg mass kept at the centroid of the triangle. 
Calculus
Can anyone help me with these two optimization problems? A boat leaves a dock at 9:00 P.M. and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 10:00 P.M. How many minutes after 9:00 P.M. were the two boats... 
physics
Two cars are driving toward each other on a straight, flat Kansas road. The Jeep Wrangler is traveling at 84 km/h north and the Ford Taurus is traveling at 43 km/h south, both measured relative to the road. What is the velocity of the Jeep relative to an observer in the Ford? 
physics
Two cars are driving toward each other on a straight, flat Kansas road. The Jeep Wrangler is traveling at 84 km/h north and the Ford Taurus is traveling at 43 km/h south, both measured relative to the road. What is the velocity of the Jeep relative to an observer in the Ford? 
PHYSICS
Two cars collide at an intersection. Car A, with a mass of 2000kg, is going from west to east, while car B, of mass 1300kg, is going from north to south at 15.0m/s. As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an ... 
Physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each?  I've worked this ... 
Physics
How much force are you exerting on the earth right now? How can a rocket operate in outer space? Describe the process of walking. 
Geometry
A satellite in a nearly circular orbit is 2000 km above Earth's surface. The radius of Earth is approximately 6400 km. If the satellite completes its orbit in 112 hours, calculate the speed of the satellite in kilometers per hour. Please help me. I have a math test tomorrow. 
Math
Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ... 
Mathematics
Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ... 
Math
Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ... 
MATH HELP
Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ... 
Science , Biology
Cretaceous extinction... The evidence tells you that “overwhelming evidence suggests that the extinction was caused by a 10kmdiameter asteroid that struck Earth.” Suggest at least three lines of evidence that might have led scientists to this conclusion. Could you please... 
PHYSICS!!
A 10.2 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 123.0 N parallel to the incline, which makes an angle of 14.6◦ with the horizontal. The coecient of kinetic friction is 0.39 and the crate is pulled a distance of 8.1 m. ... 
Physics Classical Mechanics
A person of mass m2= 85.0 kg is standing on a rung, one third of the way up a ladder of length d= 4.0 m. The mass of the ladder is m1= 15.0 kg, uniformly distributed. The ladder is initially inclined at an angle θ= 40.0∘ with respect to the horizontal. Assume that ... 
science
If Earth is 149.6 million Kilometers from the sun, or 93 million miles away. suppose there was an imaginary road from earth to the sun. If you were in a car traveling 100 km an hour, it would take you 1,490,000 hours or just 170 years to reach the sun. If it took 170 years to ... 
maths
from a certain spot, the top of a triangle had an angle of elevation of 40 degree. move 15meter in a straight line towards the flag pole.Now to the top has an angle of elevation of 60degree.Find the height of the flagpole and it's distance from the second point. 
physics
A charge of 1.5uC is placed at the origin, and a charge of 3uC is placed at x = 1.5m. Locate the point between the two charges where the electric field is zero? Q1 P Q2 x*. 0 <1.5m> 
math
Can someone please take a look at these results and make sure they're correct? Thank you! 5. The Leaning Tower of Pisa leans toward the south at an angle of 5.5 degrees. One day near noon its shadow was measured to be 84.02m long and the angle of elevation from the tip of the ... 
Exploring Space
if a satellite were to be launched with too little speed or too much speed then what would happen? If a sattellite were to be launched with too much speed then the friction in the air would make it heat up to the point where it would burn up. Earth's gravity wouldn't be strong... 
Physics
In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the magnitude of the earth... 
Physics
In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the magnitude of the earth... 
Physics (Online w/ no teacher)
Find the change in the force of gravity between two planets when the distance between them is decreased by a factor of 5. 
Math
Six friends want to buy pizza and need to decide between two deals. The first deal is for two pizzas for $7.00 each for a pizza with a 10 inch diameter. Or a second deal with one pizza with a 14 inch diameter for $15.00. The friends decide to buy the offer with the most pizza ... 
physics
An object moves along a circular path with a constant speed, ⃗vo. (Semi Circle with point A on one side point B on the other. Looks like a 90 degree angle with points A and B on either side of the hypotenuse.) The average acceleration in going from A to B is 1. zero 2... 
math2
I was solving a problem. In It r have been given that two lines are perpendicular to each other The equation of one line 2x3y+4=0 Now i have to find the equation of another line We can find it by finding the slope of the abovementioned line( the other line) But we are ... 
College Physics
Sirius is about 9.0 lightyears from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earthbased observer? How far is the trip according to you? 
colleg physics
Sirius is about 9.0 lightyears from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earthbased observer? How far is the trip according to you? 
college physics
Sirius is about 9.0 lightyears from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earthbased observer? How far is the trip according to you? 
Physics
If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its speed is threefifths the escape speed? I keep getting the answer 2.56x10^6 m after solving it a few different ways. Help would be great. 
PHYSICS
Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per square meter that reach the earth. 
physics
Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per square meter that reach the earth. 
physics
Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 521 nm, determine the number of photons per second per square meter that reach the earth. 
Physics
Hello everyone I know that when a force is applied it has to exert a force opossite But this really is not in my head can someone please give me an evidence or even a diagram showing how can we exert an opposite force if we are walking forwards Thanks alot When we are walking ... 
Physics
A 0.7 umdiameter droplet of oil, having a charge of +e, is suspended in midair between two horizontal plates of a parallelplate capacitor. The upward electric force on the droplet is exactly balanced by the downward force of gravity. The oil has a density of 860 (kg/m^3), ... 
Physics
A 23.7 kg child, with a 4.35 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the net force (positive up/negative down) on Earth due to the child when the child is (c) standing still and (d) in the air. 
Physics
If in a manufacturing company they want to produce a system where the force F1 must be 10% of the output force F2.if the area of the pistol (where F1 is applied)is 450 spuare milimetre.calculate the diameter of the pistol two where F2 is an output force 
Earth Science (check answers)
Describe the importance of maintaining the ocean ecosystem. It is important to maintain because the ocean ecosystems because it provides reefs that support a complex ecosystem of ocean organisms that live and help each other to survive. Virtually every phyla on Earth is ... 
English 2
2. The overall message of "To Every Thing There Is A Season" is a. every human emotion and activity has an appropriate time in life b. life is a meaningless cycle of pleasure and pain c. humans have been given power over nature, and they should use it wisely d. there is no ... 
math
an electric pole is 24 meter high casts a shadow of 20 meter long.find the height of the tree if it castes a shadow of 15 meter long under similar conditions. [explain and make the table if direct or inverse variation] 
physics
A "swing" ride at a carnival consists of chairs that are swung in a circle by 16.6 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 239 kg. (a) Determine the tension in the cable attached to the chair. (... 
Physics
A "swing" ride at a carnival consists of chairs that are swung in a circle by 19.8 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 144 kg. (a) Determine the tension in the cable attached to the chair. (... 
Physics
A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.4 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 291 kg. (a) Determine the tension in the cable attached to the chair. (... 
Physics
A "swing" ride at a carnival consists of chairs that are swung in a circle by 11.5 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 204 kg. (a) Determine the tension in the cable attached to the chair. (... 
Physics
A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.9 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 193 kg. (a) Determine the tension in the cable attached to the chair. (... 
Application of Integrals Check My Work
I would like someone to doublecheck my answers on this question: River currents (miles per hour) at a certain location are given below. The current direction at this location was “from the north” during the time interval shown, and the current did not exhibit any severe ... 
Science
In what way is erosion NOT like weathering? A)It is a force that changes the earth's surface B)It is a destructive force C)It changes rocks in some way D)It breaks down rocks I think D?? 
reading
Examine the evidence of the Earth's shape. The sharp horizon at first suggests a flat Earth with an edge. But as you walk toward the horizon, the "edge" recedes ahead of you, implying that the Earth's surface is curved. Look also at a ship sailing out to sea. It does not stay ... 
Physics
objects with masses of 285 kg and a 585 kg are separated by 0.420 m. (a) Find the net gravitational force exerted by these objects on a 62.0 kg object placed midway between them. 
physics As
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 A piece of fuse wire has a diameter of 0.22mm and carries a ... 
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 A piece of fuse wire has a diameter of 0.22mm and carries a ... 
physics
An hydraulic press has an input cylinder of 2cm diameter and an output cylinder of 6cm diameter. Find the force exerted by the output piston when a force of 20N is applied to the input piston. 
physics
A particle with a charge of 4.0x10^5 C, a mass of 2.0x10^7 kg and a velocity of 6.0x10^4 m/s [W] is travelling perpendicularly through an external magnetic field such that the force of gravity is balanced by the magnetic force. Determine the direction and magnitude of the ... 
Physics help
A particle with a charge of 4.0x10^5 C, a mass of 2.0x10^7 kg and a velocity of 6.0x10^4 m/s [W] is travelling perpendicularly through an external magnetic field such that the force of gravity is balanced by the magnetic force. Determine the direction and magnitude of the ... 
physics
A particle with a charge of 4.0x10^5 C, a mass of 2.0x10^7 kg and a velocity of 6.0x10^4 m/s [W] is travelling perpendicularly through an external magnetic field such that the force of gravity is balanced by the magnetic force. Determine the direction and magnitude of the ... 
physics
A particle with a charge of 4.0x10^5 C, a mass of 2.0x10^7 kg and a velocity of 6.0x10^4 m/s [W] is travelling perpendicularly through an external magnetic field such that the force of gravity is balanced by the magnetic force. Determine the direction and magnitude of the ... 
math
a vertical flagpole casts a shadow of 12ft long at the same time that a nearby vertical past 8ft casts a shadow 3ft long. Find the height of the pole 
Physics
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 66.0∘. Dog A exerts a force of 278N , and dog B exerts a force of 324N . =Find the magnitude of the resultant force. =Find the angle the resultant force makes with the rope of dog A. 
PHYSICS
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 62.0∘. Dog A exerts a force of 270N , and dog B exerts a force of 302N . Find the magnitude of the resultant force. Find the angle the resultant force makes with the rope of dog A. 
SS PLZ HELP ME ASAP
What are the two major forces that shape and reshape earth? Describe how each one works. plz plz plz help me there are no answer choices hope u can still help 
Ethics
1. Hill claims that a fruitful way to think about the badness of destroying the environment is? To think about what kind of human would choose to destroy the earth. To appeal to theories about God and care for the earth. To examine people’s intuitions about whether it is ... 
physics
A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s. 
earth
how long does it take for light from Jupiter to come to earth. for example tonight the planet Jupiter can be seen by the moon, 2/25/12 and we see the light from the planet and how old is that light. thanks. jerry in colorado USA 
physics
Mars Rover When the Mars rover was deployed on the surface of Mars in July 1997, radio signals took about 12 min to travel from Earth to the rover.How far was Mars from Earth at that time? 
algebra please help
The weight M of an object on Mars varies directly as its weighton earth. A person who weighs 95 lb on earth weighs 38 lbs on Mars. How much would a 100 lb person weigh on Mars? 
physics
A rocket cruising past earth at 0.800c shoots a bullet out the back door,opposite the rocket's motion,at 0.900c relative to the rocket. What is the bullet's speed relative to the earth? 
URGENT HELP
1.In a pith ball experiment, the two pith balls are at rest. The magnitude of the tension in each string is T = 0.55 N, and the angle between each string and a vertical line is θ = 27.33°. What are the values for the magnitudes of electrostatic force, Fq, and the ... 
Physics/ electricity
Two charges, separated by a distance of 1.3 m, attract each other with a force of 0.078 N. If one charge is +3.7 μC, what is the other charge? 
Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and ... 
History!!
I need help with what to put for my answer to this question, please don't link me to a site. How did the MexicanAmerican war ignite a conflict over slavery between the North and the South? 
Mathis
Fiona is dissatisfied with her current weekly salary. If she received a raise of $0.50 per hour and worked an additional 4 hours each week her weekly salary would then be $500. What is Fiona current salary a) $380 b)$400 c)$420 d)440 e) not e ought information I put d can you ... 
physics
Four identical masses of mass 800kg each are placed at the corners of a square whose side lengths are 15.0cm . What is the magnitude of the net gravitational force on one of the masses, due to the other three? 
Environmental Science
I need a little help on these, i've posted them a few times but i don't get any answers. 29. A common feature of thermal pollution and artificial eutrophication is that they both a. have sources that are difficult to identify and control b. cause large mats of algae to bloom ... 
Physics Number 3 (Online w/ no teacher)
Many people mistakenly believe that the astronauts that orbit the Earth are “above gravity.” Calculate g for spaceshuttle territory, 200 kilometers above the Earth’s surface. Earths’ mass is 6 X 10 to the 24th and its radius is 6.38 X 10 to the 6th (6380 km). Your ... 
Earth Science
In recent years, scientists have been concerned about decrease in the ozone content of earth’s upper atmosphere. What is the principle threat to humans if this decrease in ozone continues? My answer is, Decreasing precipitation leading to crop failure and possible human ... 
math
A council consists of 10 members.four are NDC,three are NPP and three are from other parties.if a committee of three is to be selected,find the probabilities following: I.one of each party. II.Two NPP and one from other parties. III.one from other parties and two NDC 
physics
Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 west of north, and the resultant of these two pulls is 560.0 directly northward. 
physics
Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 west of north, and the resultant of these two pulls is 430.0 directly northward. 
science
Will we ever run out of air? Air is stuck to the planet by gravity, it won't leave. Two things are adding to the air all the time too, the planet is always releasing gasses from volcanoes and volcanic vents, and there are some meteors that are mostly ice that evaporate when ...