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 79

Algebra 2
How do you set up this?I am lost Find an equation for the linear model of the situation below and use it to make a prediction. A train is traveling north at a constant rate. At 3:00 P.M. it is 55 miles north of a city. At 4:15 P.M. it is 80 miles north of the city. If d ... 
Physics
When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of... 
Physics
When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of... 
physics
A student of weight 810 N was sent to another planet called Nerdland. If Nerdland has a mass that is 4 X the mass of the earth and a radius that is 1/2 the radius of the earth, what would be the mass in kg of the student when on Nerdland? what would be the weight in N of the ... 
Physics
A 10,000 kg railroad car traveling north at 10 m/s collides with a 5,000 kg rail car also moving north but at an unknown speed. After the collision, the two cars lock together and move north at 8 m/s. How fast was the second car moving before the impact? 
Chemistryatoms
A. How many protons are in one atom of fluorine  19? B. How many neutrons are in one atom of potassium  39? C. How many electrons are in one neutral atom of V  51? D. What is the symbol for the element that has 78 protons? E. What is the symbol for the neutral atom that has... 
Science (Help, please!)
"Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance. The other forces ... 
Physics
two toy ducks are attached to each other by a string and being pulled by a happy guy. the ducks were 2.0 kg and 5.0 kg (front duck) and the guy was pulling them with a force of 10 N. calculate the acceleration if kinetic coefficient = 0.10. Calculate the tension in the rope ... 
Physics
Two trains are approaching each other, one at 23 mph and the other at 37 mph. How far apart are they one minute before collision? 
mathematics
the sum of two numbers is 31. 2/3 of one of the numbers added is equal to 5/8 of the other.find the two numbers 
History
The Voting Rights act of 1965 made it legal for states to A)charge votes a pole tax before casting a vote B)require a person to take an English test before voting C)refuse to allow people to vote based on their race or gender D)fine anyone who interferes with another person's ... 
9th grade (math)
the surface 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 
physic
Hi!Question:The helicopter view in the fiure below shows two people pulling on a stubborn mule. Asume that F1 is 110N, and F2 si 70N. The forces are measured in units of newtons(N). a.Find the single force that is equivalent to the two forces shown. magnitude____N ... 
Physics
A charge of 3.75 109 C is located 3.1 m from a charge of 3.10 109 C. Find the magnitude of the electrostatic force exerted by one charge on the other. 
physics
A 6.6 nC charge is located 2 m from a 4 nC charge. Find the magnitude of the electrostatic force that one charge exerts on the other. 
Solid Mensuration
one diagonal of a cyclic quadrilateral coincides with a diameter of a circle whose area is 36pi cm^2. If the other diagonal which measures 8cm meets the first diagonal at right angles, find the area of quadrilateral. Show your solutions 
Solid Mensuration
one diagonal of a cyclic quadrilateral coincides with a diameter of a circle whose area is 36pi cm^2. If the other diagonal which measures 8cm meets the first diagonal at right angles, find the area of quadrilateral. Show your solutions 
Physics
An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 39 steps at an angle 45 north of east, then 80 steps at an angle 60 north of west, then 51 steps due south. Assume his steps all have equal length. Save him from becoming hopelessly lost in the ... 
physics!
a 4.0 kg object has a velocity of 4.0 m/s headed east. an explosion causes it to break up into two smaller 2.0 kg objects. if one of the objects has a velocity of 3.0 m/s at an angle of 30 degrees east of north, what is the velocity of the other object after the explosion 
Chemistry
Which of the following statements is true regarding a covalent bond in CO? Valence electrons are transferred to the oxygen atom. The bond length is less than the sum of the two atomic radii. Bonding electrons are stationary in the CO molecule. all of the above none of the above 
physics
four equal charges of 10microculomb is placed in4 corners of a square of side 0.2m. Calculate the force at any one of the charges.......... 
physics
The force exerted by two identical point charges on each other is 0.21 N. (a) Find the magnitude of the charge on each point charges. 
Physics
Three identical charges of 2.0 uC are placed at the vertices of an equilateral triangle, 0.15m on a side. Find the net force acting on each angle. 
Science
During betaparticle emission, a neutron splits into a proton and an electron two protons two electrons two neutrons 
history
out of the three basic necessities  food, shelter, and clothing  which one do you think is the most important for India and other South Asian countries? 
Physics
A 60 kg block slides along the top of a 100 kg block with an acceleration of 3.0 m/s2 when a horizontal force F of 320 N is applied. The 100 kg block sits on a horizontal frictionless surface, but there is friction between the two blocks. (a) Find the coefficient of kinetic ... 
science
The greatest and least resultant of two forces acting at a point is 29 kgwt and 5 kgwt respectively.If each force is increased by 3 kgwt.Find the resultant of the two new forces when acting at right angles to each other? 
science
The greatest and least resultant of two forces acting at a point is 29 kgwt and 5 kgwt respectively.If each force is increased by 3 kgwt.Find the resultant of the two new forces when acting at right angles to each other? 
science(check answers)
1. A 2. C 3. A 4. D 1. Coal, oil, and natural gas are inexpensive sources of fuel which do not cause pollution when used. A. true B. false 2. One reason people around the world use coal as an energy source is: A. It is nonrenewable. B. it can be found many places C. it is a ... 
physics
metal sphere has a charge of +10C. What is the net charge after 5.1 x 1013 electrons have been placed on it? 
Physics
A metal sphere has a charge of +12C. What is the net charge after 2.1 x 1013 electrons have been placed on it? 
Physics
A metal sphere has a charge of +12uC(microcoulombs). What is the net charge after 2.1 x 10^13 electrons have been placed on it? 
Physics
As the distance between two masses increases, the gravitational force of attraction between them A. decreases*** B. increases C. remains the same Is this correct? 
Physics
The force on a particle is directed along an x axis and given by F = 1.7(x/2.8  0.95) where x is in meters and F is in Newtons. Find the work done by the force in moving the particle from x = 0 to x = 6.9 m. 
Math
The period of revolution of a planet around the sun is the time it takes for the planet to complete one orbit of the sun. The period, P years, is give by Kepler's third law P^2=D^3, where D is the average distance from the sun in astronomical units (AU). One AU is the average ... 
Physics
A 4700 kg truck on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the truck is 189 N backward: a) Determine the values of the other forces acting on the truck. b) Draw a free body diagram and determine the ... 
Physics
Two rocks are thrown simultaneously from the top of a very tall tower with identical speeds of v = 7.70 m/s, but in two different directions.One of them is thrown with an angle of 10.0 degrees below the horizontal, the other one at an angle of 50.0 degrees above the horizontal... 
AlgebraFunctions
Could you please check my answers and help me with two problems? Determine which two functions are invereses of each other. 1. f(x)=5x, g(x)x/5, h(x)5/x I got that f(x) and g(x) are invereses of each other 2. f(x)=x2/(2), g(x)=2x2, h(x)=x+2/(2) I got that f(x) and h(x) are... 
physics
A small cork with an excess charge of +7.0 µC is placed 0.16 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units of N 
Physics
A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in units of N 
physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A 3000 truck tows a 1500 car by a chain. Part A If the net forward force on the truck by the ground is 3500 , what is the acceleration of the car? Part B What is the tension in the ... 
Physics
A mass m1 = 4.1 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5.9 kg. A force of magnitude F = 32.0 N pulls m1 to the left a distance d = 0.83 m. 1) How much work is done by the force F on the two block system? 2) How much work is ... 
bearings
PQRS are four locations on the same horizontal plane Q is an bearing of 041 degree from P and the distance is 40km,S is 28km from R on a bearing 074 degree, R is directly due north of P and the distant between Q and R is 38km. Find to the nearest whole number a. the bearing of... 
CALCULUS ONE!
The graph of sinx and cosx intersect once between 0 and pi/2. What is the angle between the two curves at the point where they intersect? (You need to think about how the angle between two curves should be defined). 
physics
In a double slit experiment with a single electron, a very thin film of fluorescent material that emits a photon whenever an electron passes through is placed on one of the slits to check which slit the electrons goes through. Describe the resulting pattern on the detecting ... 
PHYSICS
How does the magnitude of the electrical force between two charged objects depend on the distance between the charges? I really frustrated right now, and I can't figure out the answer too this question. Help pleeease :) 
Physics
A 7.94 nC charge is located 1.75 m from a 4.18 nC point charge. Find the magnitude of the electrostatic force that one charge exerts on the other. 
Geometery
I am ask to write a two column proof. Given that AD is the diameter of circle O, and DC is tangent to O at D. Prove that Triangle ABD ~ (congruent) to triangle ADC 
MathAlgebra
When a given object moves a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640lb for a velocity of 20mi/h and a radius of 5m, find the force for the velocity of 30mi/h and a radius of... 
precalc
What are parametric equations? How would you find the rectangular eq's when given parametric eq's? and how would you find parametric eq's when given rectangular eq's? for example, given x=cos4t and y=sin4t (t is between 0 and 2pi) what is the retangular equation? given y=2x^(2... 
Calculus 3
Vectors The thrust of an airplane's engine produces a speed of 400 mph in still air. The wind velocity is given by <20,30>. In what direction should the plane travel to fly due south? Give your answer as an angle from due south. 
Chemistry
Hi. I need some help with this. When you stretch a balloon against your lips, is heat given off or absorbed? Which driving force is dominating this change, the tendency toward lower energy or the tendency toward disorder? Heat is given off obviously but I don't know what to ... 
Math
Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? 
Geometry
Which is greater, the total volume of three spheres, each of which has a diameter 5 in., the volume of one sphere that has a diameter 8 in., or the volume of a hemisphere with a diameter of 10 in.? a) The volume of three spheres, each with a diameter of 5 inches, is greater. b... 
physics
A straight horizontal wire carries a current of 3.55 μA. A proton is moving above the wire in a direction parallel to it but opposite to the direction of the conventional current in the wire, at a constant velocity of 8.00×106 m/s. Assume that the force of gravity acts ... 
algebra 1
if you go from one point to the other do you subract the a and b or do you do all points in between to find the elevation? I'm not sure what this question refers to. Are you trying to calculate slopes? 
Algebra
A particle P of mass 2gms moves on the Xaxis and is attracted towards origin O with a force numerically equal to 8x. If it is initially at rest at X = 10, find its position at any subsequent time assuming (a) no other force acts, (b) a damping force numerically equal to 8 ... 
physics
1.descibe the construction and working of machine used to generate high voltage? 2.draw electric lines between the plates of a parallel plate capacitor with 1(air) and 2(dielectric) as a medium? 3.near the surface of earth the field is about 100V/m. why do we then not ... 
Electricity
suppose that you're facing a straight current carrying conductor, and the current is following toward you.the lines of magnetic force at any point in the magnetic field will act in? A)the same direction as the current. B)a clockwise direction. C)the direction opposite to the ... 
Social Studies
How are the seasons of the mid latitudes affected by air masses from the tropics and the north and south poles? 
US History
How did the Missouri Compromise cause the North and South to have even stronger feelings of sectionalism in the United States? 
science
a person moves 30 m north , then 20 m east and finally 30 root 2 south west what is his displacement from the original position 
algebra
two nombers have a sum of 15. one of the numbers is x. Find an expression for the other number 
bcm
if one of the two complementary angles is 20 degree larger than 4 times the other, find the arngles. 
calculus
find the two numbers whose sum is 10, if the product of one by the cube of other is a maximum. 
math
find two numbers such that one of them is five times the other and their difference is 132. 
Math
one of the acute angle of an isosceles triangle is 50 degree find the other two angles 
physics
A rope of mass 0.78 kg is stretched between two supports 31 m apart. If the tension in the rope is 1800.0 N, how long (in seconds) will it take a pulse to travel from one support to the other 
physics
A rope of mass 0.73 kg is stretched between two supports 31 m apart. If the tension in the rope is 1100.0 N, how long (in seconds) will it take a pulse to travel from one support to the other? 
Geography
Can someone please check my work? 1. Name the South American countries through which the Tropic of Capricorn passes. Paraguay, chile, Argentina, Brazil 2. Classify each of the following as high, mid, or low latitude. Europe: high South America: low Antarctica: high United ... 
science
which of the following is true about the metal boxes pictured below? A.The magnetic force wil be strongest on box two B.the magnetic force will be weakest on box three C.the magnetic force will be strongest on box one D.the magnetic force will be weakest on box one please help... 
physics
A space probe of mass M is moving with uniform velocity v far from earth and from other massive bodies,and it is planned to deflect from its trajectory through an angle theta by firing from it a suitable mass at velocity v.Derive an expression for the suitable mass m 
PHYSICS PLEASE HELP !!!!!
Two objects are placed on a frictionless incline which is inclined at 65.5 degrees. A mass of m1 = 7 kg is tied to a wall, which is at the top of the incline, by rope 1 which is parallel to the incline. A mass of m2 = 13 kg is tied to m1 by rope 2 which is also parallel to the... 
EARTH SCIENCE
How are carbon dioxide and other trace gases thought to be potentially related to global warming? Are the levels of these gases in our atmosphere increasing or decreasing? Why? Finally, what are some of the observed climatic trends and possible consequences associated with ... 
science
what chemical characteric of a substance that allows it to oxidize rapidly Usually the material has one or two electrons in the outer shell and the ionization potential is low. 
physics
When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B... 
History
"And I further declare and make known that such persons of suitable condition will be recevied into the armed service of the US to garrison forts positions stations and other places and to man vessels of all sorts in said service." What did this portion of Lincon's ... 
physics
Two books of mass m1 = 6.9 kg and m2 = 3.8 kg are stacked on a table as shown in the figure below. Find the normal force acting between the table and the book on the bottom. im confused where to start 
principles of physics
When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B... 
Math
Clara measured the diameter of the circle. How many centimeters is the diamter? Clue:The measure of the diameter is between 6 x 0.15 and 9 x 0.15. Clue:The units digit and the hundreths digit are the same Clue:If the diameter was 100 times longer, its measure would be a square... 
math
13. If two planes leave the same airport at 1:00 PM, how many miles apart will they be at 3:00 PM if one travels directly north at 150 mph and the other travels directly west at 200 mph? A. 50 miles B. 100 miles C. 500 miles D. 700 miles E. 1,000 miles 
physics
A motor boat is moving towards north at 25km/hr and rate of flow of water is 10km/hr along a direction of 60degree is east of south.Find the resultant velocity of the boat and also the direction in which it is moving? 
physics
A motor boat is moving towards north at 25km/hr and rate of flow of water is 10kn/hr along a direction of 60 degree is east of south find the resultant velocity of the boat and also the direction in which it is moving 
NonWestern Art
How to find images that addresses changes in art and or culture that occurred as a result of Western contact and/or influence in the five continents which are Africa, Asia, Australia, North America, and South America 
physics
?????Two books of mass m1 = 6.9 kg and m2 = 3.8 kg are stacked on a table as shown in the figure below. Find the normal force acting between the table and the book on the bottom. SO g*m1+g*m2=104.86 N = mgcos(θ) N= (104.86)(9.81)Cos? Where do i find cos? IS THIS RIGHT? 
Physics
Mere and Ruth investigated the relationship between the applied force, F, and the extension, x of a spring. The results they obtained are shown in the table below. Force F (N) Extension x (M) 0.0 0.0 2.0 0.033 4.0 0.066 6.0 0.099 8.0 0.132 10.0 0.165 state the type of ... 
physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ... 
physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between the freezer and the ... 
Math
Two roads intersect at right angles. A water spring is located 65 m from one road and 55 m from the other road. A straight path is to be laid out to pass the spring from one road to the other. Find the least area that can be bounded by the roads and the path. area in m2 = can ... 
SS HELP PLZ
1)Which of the following does NOT concern dividing up the earth into smaller sections? A. Parallels B. Meridian C. Cardinal Directions**** D. Hemispheres 2)Which of the five themes includes human and physical features at a specific location? A. Locations B. Place**** C. ... 
Physics
A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood surfaces is 0.61, what ... 
physics
A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood surfaces is 0.66, what ... 
chemistry
Using the equation Zeff=Z−S and assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant, S, calculate Zeff for the 2p electrons in both ions. 
physics
Radioactive decay of granite and other rocks in Earth's interior provides sufficient energy to keep the interior molten, to heat lava, and to provide warmth to natural hot springs. This is due to the average release of about 0.03 J per kilogram each year.Find an increase in ... 
Chemistry
Two beakers are placed in a sealed container surrounded with air. In one beaker is pure H2O (Beaker A) and the other beaker is a 10% Sugar solution (Beaker B). As the system approaches equilibrium what change occurs to the volume of water in beaker A? What happens to the ... 
physics
A person pulls with a force of 40 N on two boxes at rest. The top box is 3.0 kg and the bottom box is 6.0 kg. The coefficient of kinetic friction between the floor and the larger box is .20 and the angle is 30 degrees. a) if the smaller box doesn't slide on top of the larger ... 
physics
A person pulls with a force of 40 N on two boxes at rest. The top box is 3.0 kg and the bottom box is 6.0 kg. The coefficient of kinetic friction between the floor and the larger box is .20 and the angle is 30 degrees. a) if the smaller box doesn't slide on top of the larger ... 
Chemistry
When an electron makes a transition from the n=3 to the n=2 hydrogen atom bohr orbit, the energy difference between these two orbits (3.0x10^19 J) is given off in a photon of light. The relationship ... between the energy of a photon and its wavelength is given by E=hc/... 
physics
two crates, of mass 75 kg and 113 kg, are in contact and at rest on a horizontal surface. A 727 N force is exerted on the 75 kg crate. If the coefficient of kinetic friction is 0.15, calculate the following: a)the acceleration of the system b) the force that each crate exerts ... 
PLEASE HELP PHYSICS!
Two toy ducks attached to each other by a string, are being pulled by a child. The front duck is m1= 5.0 kg and the back duck is m2= 2.0 kg. The happy guy pulls them with a force of 10 N and friction exists. The toys are moving with constant velocity. A) if the coefficient of ...