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 72

Top Schools
Is Clarkstown North or South HS is one of the top best high schools?????? My dad wants me to go to that school after middle school if we won the lottery and move. 
physics
even if drag force i.e air resistance is greater in magnitude as compared to other force ,there will be no motion in the direction of drag force, right?motion will be still in direction of that 'other force 'but as it is less than drag force there will be deceleration ,am i ... 
college Physics
You are in closed room somehwere on Earth. You have no compas, gyroscope or GPS. No TV, phone, FAX, emil, computer, internet, or cell. No cable no external connections with outside networks. However you have electricity the regular network and a lab with all sort of electric ... 
Engineering
You have two balloons, one large (30 cm in diameter) and one small (15 cm in diameter) filled with helium. Both balloons are made of the same material (latex) and have the same unfilled material thickness (2 mm) and have a 3 cm diameter. You release both balloons at sea level ... 
Physics Please Help!
1. How much work is required to stop an electron (m = 9.11 10^31 kg) which is moving with a speed of 1.97 10^6 m/s? 2. An automobile is traveling along a highway at 91 km/h. If it travels instead at 100 km/h, what is the percent increase in the automobile's kinetic energy? 3... 
Physics Please Answer
1. to make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter at 20 degree celcius. to what ... 
physics
Two workers are sliding 450 kg crate across the floor. One worker pushes forward on the crate with a force of 380 N while the other pulls in the same direction with a force of 380 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ... 
Physics
A passenger on a ride at the firemen's field days sits in a chair and is swung around at the end of a cable connected to a central tower. At full speed, the cable makes an angle of 56o with the vertical, and the chair is 46 m from the pole. 1)What is the speed of the passenger... 
Physics
A passenger on a ride at the firemen's field days sits in a chair and is swung around at the end of a cable connected to a central tower. At full speed, the cable makes an angle of 56o with the vertical, and the chair is 46 m from the pole. 1)What is the speed of the passenger... 
Physics
A hydrogen atom is at the earth's surface. The electron and proton in the atom are separated by a distance of 5.29x10^11m. What is the ratio of the magnitude of the electrical force exerted by the proton on the electron to the weight of the electron? 
Physics
Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. do i use the formula U=GMm/r I get 290 MJ? 
Earth Science
In what ways can sea level be lowered? What effect might this have on existing life forms? I can't find it in my textbook. Can somebody helps??????? THANKS A LOT!!!!! 
grade 9
A 40m deep well with radius 3.5m is dug & the earth taken out is evenly spead to from a platform of dimension 28m by 22m.find the heght of the platfoem? 
math
The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time between doses, and k is ... 
Math
The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time between doses, and k is ... 
intermediate algebra
Two complementary angles are such that one is eight times larger than the other. Find the two angles. 
Chemistry
I am really confused about polar and non polar molecules. I really don't understand how to know if something is polar or not. Or about bond polarity vs. molecular polarity (net dipole moment). Also, if it has a lone pair when you draw a lewis structure does this automatically ... 
Math
Three large barrels are transported on a railroad car by stacking the third one on top of the other two and using a tight metal band around all three to hold them together. If the outside diameter of each barrel is 3 feet, then what is the length of the metal band? 
science help pls pls
Derek designed an experiment to demonstrate interactions between Earth systems. He cleared a patch of land in his backyard and poured a glass of water from a height of 12 inches above the ground. A depression was formed on the land at the spot where the water hit the ground. ... 
Math
1. 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.=1.618. 
Physics
A 7410kg satellite has an elliptical orbit, as in the figure. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. The point on the orbit that is closest to the earth is called the perigee and is at the far ... 
Physics
A 7410kg satellite has an elliptical orbit, as in the figure. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. The point on the orbit that is closest to the earth is called the perigee and is at the far ... 
Physics
Suppose two thin flat plates measure 3.5m x 3.5m and are separated by 6.5mm. They are oppositely charged with +20microCoulombs. Estimate the total force exerted by one plate on the other (ignore edge effects). 
Physics
Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing... 
Physics
Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing... 
lwtech
In order to build a bridge across a river, a surveyor is hired to find the distance across the river. The surveyor places a stake on either side of the river. As shown in the diagram below (the diagram is not drawn to scale). He measures the bearing to the first stake as 16 ... 
physics
please check my answers and help me with the first one. how can you charge an object negatively with only the help of a positively charged object? This one I am not too sure, when one material is rubbed against another electrons jump readily from one to the other but protons ... 
Math
A Japanese beetle has a length between 0.3 and 0.5. Find two lengths that are within the given span. Write them as fractions in simplest form. 
college algebra
given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2)) 
Physics
A small bead of mass m and charge q is free to move in a horizontal tube. The tube is placed in between two spheres with charges Q = − q. The spheres are separated by a distance 2a. What is the frequency of small oscillations around the equilibrium point of the bead? You... 
Science
Explain the law of motion needed to solve thisproblem . On Planet Zorg, a 30 kg barbell can be lifted by only exerting a force fo 180N. What is the acceleration of gravity on Planet zorg? Predict how the motion of this object would change if on earth. 
maths
Two trains are on the same track a distance 300 km apart heading towards one another, One at a speed of 150 km/h and other at a speed of 50 km/h. A fly starting out at the front of one train, flies towards the other at a speed of 600 km/h. Upon reaching the other train, the ... 
College Algebra
The sum of two numbers is 10. One number is five less than twice the other. Find the two numbers. 
Physical Science
Why is metal shiny? A. The electrons absorb each light wave. B. The loose electrons reflect most wavelengths of light. C. The electrons emit light due to electronic excitation. D. The electrons transmit most wavelengths of light. (I think the answer is B, but I am not positive) 
physics
a +35x10^6 C point charge is placed 32 cm from an identical +32x10^6 C charge. how much work would be required to move a +50.0x10^6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? please show work and explain. i still don't ... 
Helth science
True or False: Laid end to end, the blood vessels in your body would circle the Earth two and a half times. 2. The _________ is made up of cardiac muscle. 
physics
Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 69.5 km/h, and B a speed of 84.3 km/h (both relative to the earth). (b) If A is initially 394 m in front of B, how long will it take for B to reach A? 
Police Officer
Can some one please explain tome why Police Officer should not assume? For example when a police Office is told of a dispute between two parties why should they not assume what they are hearing is not the truth. The only reason I could figure out is based on the information ... 
PHYSICS
Two metal rods  one copper the other aluminum  are connected in series, as shown in the figure below. Note that each rod is 0.525 m in length, and has a square cross section 1.25 cm on a side. The temperature at the copper end of the rods is 2.00°C; the temperature at the... 
Physics
A beam that weighs 10.0 N/m is 2.5m long. It is supported at point a point 0.78 m from one end.? Find the weight of the object that must be placed on the other end of the beam to balance it 
Astronomy
Suppose you weigh 105 . How much would you weigh on other planets in our solar system? Assume you can stand either on the surface or in an airplane in the planet's atmosphere. (Hint: Recall from Chapter Light and Matter that weight is mass times the acceleration of gravity. ... 
Physics
The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 multiplied by 104 kg/s, with an exhaust speed of 2.55 multiplied by 103 m/s. (a) Calculate the thrust produced by these engines. answer should be in N (b) Find the acceleration of the vehicle ... 
math
between which two digits should a decimal point be placed so the value of the resulting number is 8.7654321 x 10^4 ? 
PHYSICS
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of the apple. #3.) ... 
PHYSICS
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of the apple. #3.) ... 
geometry
radius of 3960 miles cause there 5280 feet find length in feet by circumference of earth use ~3.14 
physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ... 
physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ... 
physics
You are standing at a spot where the magnetic field of the Earth is horizontal, points due northward, and has magnitude 36.9 μT. Directly above your head, at a height of 12.3 m, a long, horizontal cable carries a steady DC current of 381 A due northward. Calculate the ... 
la
la  Connexus CHEAT!  Ms. Sue, Wednesday, November 9, 2016 at 1:59pm You just grievously insulted me! Why on earth do you think I would give you the answers?? Teachers, note: This "student" posted from South Bend. guys how and why would she look where i live i need privacy ms... 
chemistry
are the noble gases of NCCN cyanogen = Argon HCN hydrogen cyanide = Neon thanks I don't know how to answer this. There are 10 electrons, all bonding electrons in HCN. In the case of F, for example, we say its ion is isoelectronic with Ne; i.e., there are 10 total electrons for... 
physics
if someone walks 1.5 km west then 2.5 km 30 degrees south of east then 1.5 km 40 degrees north of east. Starting at the same point, what would be the angle to get someone straight from the starting point to where the other person ended?? 
Physics
A 4 kg mass is sliding on a fricitonless surface and explodes into two, 2 kg parts. One moving at 3 m/s due north and the other at 5 m/s 30 degrees north of east. What is the original speed of the mass? Can you please verify if my answer is correct? I used mV_0 = 2(3) =[cos30(... 
3rd grade  Solor System
How many years does it take Jupiter to orbit the sun? One year on the this planet would actually be how many earth years long? 
Earth Science
As a star ages, its internal composition changes as nuclear reactions in the star's core convert one element into another. True or false? 
Ap physics 1
The mass of a star in a galaxy far, far away, is 3.12 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 2.46 × 108 km. Treating this planet and star as particles,with each mass concentrated at ... 
Physics
The mass of a star in a galaxy far, far away, is 2.13 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 7.87 × 108 km. Treating this planet and star as particles, with each mass concentrated at... 
physics
Find the magnitude of the resultant of a 40 N force and a 70 N force acting concurrently when the angle between them is: a) 0.0 b) 30.0 c) 60.0 d) 90.0 e) 180.0 
math
the game of Razz is played by 2 people using number cards,each card containing a number between 10 and 50.These cards are placed face down.In turn,each player turns up 4cards,chooses one and turns the other 3 back down.The winner is the first player who obtains 3 cards with ... 
Maths
The product of two numbers is 16/3.If one of them is 4/3 , find the other ? 
Math
Sum of two integer is 35 if one of them is 12 find the other? 
physics2
A Gaussian surface encloses two charges. The total electric flux through the Gaussian surface is 8.3 x 106 N m2/C. If one of the charges is 14.9 microCoulombs and the magnitude of the electric force between them is 2.76 Newtons, what is the distance between the charges in ... 
Chemistry
can you please help me rephrase this. The cycloaddition of a conjugated diene and a dienophile, an electrocyclic reaction that involves the 4 πelectrons of the diene and 2 πelectrons of the dienophile. The driving force of the reaction is the formation of new σbonds, ... 
Physics urgent!!!!
Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing... 
economics
Each week, Bill, Mary and Jane select the quantity of two goods, x1 and x2, that they will consume in order to maximize their respective utilities. They each spent their entire weekly income on these two goods. Suppose you are given the following information about the choices ... 
SCIENCE check answers please :)
1) Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a part of Earth’s ... 
Math
You start a search for a buried object by marking the center of the field as (0,0), with coordinates giving distances in yards. Coordinates to the north or east are positive, and the coordinates to the south or west are negative. You find nothing at (10,6), so you try a ... 
maths
please help A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen 
Science
How do you find the density of a cyclinder if you are only given the diameter, height and mass? 
Geometry
Given circle E with diameter AC and m<DAC=62 degrees, find mAD(arc). 
Chem
I was asked to fraw the energy level diagram for carbon. Carbon has 6 electrons so would the 2s and 2p orbitals both be half full? 1s = 2 electrons 2s= 1 electron 2p = 3 electrons 
Physical Science
A certain metal surface emits electrons when light is shone on it. (a)How can the number of electrons per second be increased? (b) How can the energies of the electrons be increased? 
Physics
A pilot wants to fly directly north to an airport 500 km away. His speed relative to the air is 100 km/h. Howevere there is a 40 km/h cross wind blowing from west to east. At what angle relative to the south north direction should he fly to arrive at the distant airport? How ... 
math
A turtle starts moving north at 4 feet per minute from a point P. Five minutes later, a snail starts moving south at 2 feet per minute from a point 50 feet due east of P. What is the distance (in feet) between the two animals five minutes after the snail starts moving? 
alegebra
A turtle starts moving north at 4 feet per minute from a point P. Five minutes later, a snail starts moving south at 2 feet per minute from a point 50 feet due east of P. What is the distance (in feet) between the two animals five minutes after the snail starts moving? 
Advance Algebra
The concentration (in milligrams per liter) of an antibiotic in the blood is given by the geometric series: A + Aekt + Ae2kt + + Ae(n − 1)kt where A is the number of milligrams in one dose of the antibiotic, n is the number of doses, t is the time between doses, and k is... 
math
The stiffness of a given length of beam is proportional to the product of the width and the cube of the depth. Find the shape of the stiffest beam which can be cut from a cylindrical log (of the given length) with crosssectional diameter of D 
maths
Can someone help please? A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen 
maths/physics
Need help..... A circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. A screen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen 
Science
When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb A. Transfers protons to the hair B. Remove electrons from the hair C. Transfers electrons to the hair D. Remove both times from the hair I could be removed electrons from hair . ... 
math
the serface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and yintercept 
geography
How many miles does Argentina extend from east to west? "" north to south? 
History
How did the North, South, and West contributed to the Civil War outcome? 
physics
a bee flies 12m north, 8m west, and then 4m south, what is the displacement 
GEOMETRY
Is it true that vertical angles must be oriented northsouth? 
History
How did the Civil War affect the home front in the north and south? 
world history
what did the north and south believe about the compromise of 1850? 
Math
The ratio of North American butterflies to South American butterflies at a butterfly park is 5:3. There are 30 North American butterflies at the butterfly park. How many South American butterflies are there? 
Social studies
How are the western expansion and contrast in the north and south related? 
physics
if a body moves 3m north,then 4m East and finally 6m South.what will be the displacement? 
physics
1. what happens to the force required for an object to maintain circular motion if the period is halved (goes twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered 2. In a pulley problem involving an inclined plane: a) ... 
math
a rectangular field is 750 m long and 450 m broad has two roads in middle of it,which are 5 m wide, running at right angles to each other. one is along the breadth and the other along the length .find the area 
Physics
A block is connected between two springs on a frictionless horizontally level track. The other end of each spring is respectively anchored to a vertical pin set at opposite ends of the track. The spring constant for one spring is k = 100N/m and the mass of the block is 0.300 ... 
chem
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 ¡¼10¡½^7 ¡¼mi¡½^2 in diameter, while the diameter of the 2002 hole was 6.9 x ¡¼10¡½^6 ¡¼mi¡½^2 Calculate the difference in size between the ... 
math
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 ¡¼10¡½^7 ¡¼mi¡½^2 in diameter, while the diameter of the 2002 hole was 6.9 x ¡¼10¡½^6 ¡¼mi¡½^2 Calculate the difference in size between the ... 
south al
For a hypothetical normal distribution of test scores, approximately 95% fall between 38 and 62, 2.5% are below 38, and 2.5% are above 62. Given this information, (a) the mode=_____ and (b) the standard deviation=_____. 
college earth science and astronomy
This isn't homework as much as I am trying to learn this on my own. I am trying to perform an experiment on solar power. I measured and recorded the volume (V= 250 mL) and mass (M= 250 g) of water in a cup. I then recorded the initial temperature(32 degrees celcius) of the ... 
memphis school
Two boats leave a dock at the same time, one goes eastward at 10miles per hour and the other goes north at 24miles per hour how miles apart are both boats after 3hours 
Physics
You are hanging onto the end of a long rope, the other end of which is attached to a Coast Guard helicopter. Model yourself as a particle of mass M = 52.8 kg with a diameter equal to 0.540 m. The density of the air is ρ = 1.29 kg/m3. Assume the drag coefficient between you ... 
physic
A steel rod of length 1.0000 m and crosssectional area 3.63·104m2 is placed snugly against two immobile end points. The rod is initially placed when the temperature is 0°C. Find the stress in the rod when the temperature rises to 38.9°C.