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.
100,104 results, page 72-
physics
Calculate the net charge on a substance consisting of a combination of 6.7 ✕ 10^13 protons and 3.0 ✕ 10^13 electrons.
asked by Makenzie on March 28, 2015 -
Atoms- Science
Elements having 3 or fewer electrons in the outer energy level are classified as ____________________.
asked by Twilight lover on February 8, 2009 -
College Electric Physics
(a) What is the electric potential energy in joules of two electrons separated by 1.98 nm? (b) What would be it be if the separation was doubled?
asked by Bob on February 11, 2011 -
science atoms
Elements having 3 or fewer electrons in the outer energy level are classified as ____________________.
asked by Twilight lover on February 8, 2009 -
Bio
why does pH of the matrix increase when electrons flow along the electron transport chains of mitochondria?
asked by Jin on February 14, 2008 -
Physics
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?
asked by rick on January 24, 2008 -
physics
a small pith ball carries a charge of -1.3 uc. how many excess electrons does this represent?
asked by ann on May 17, 2012 -
Science
What are the building blocks of minerals? A. Rocks B. Elements C. Isotopes D. Electrons I believe the answer is A.
asked by Anonymous on August 27, 2018 -
chemistry
how many unpeeled electrons are in this configuration 1s2 2s2 2p6 3s2 3p3
asked by Emmanuel on January 18, 2017 -
chemistry
State the number of valence electrons for an iron(II) ion in an ionic bond.
asked by McKenzie on November 26, 2014 -
chemistry
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.5*10^{15}Hz?
asked by Anonymous on January 31, 2010 -
physics
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.1 µC?
asked by Anonymous on February 7, 2011 -
Electronic
A metal plate infused with excess electrons will attract a proton placed nearby?
asked by Ruby on July 16, 2018 -
chemistry
calculate the velocities of electrons with de Broglie wavelengths of 1.0x10^2nm and 1.0nm
asked by joanne on September 23, 2010 -
science
If 2.7 moles of copper metal was deposited from a solution of Cu(NO3)2, how many electrons were involved?
asked by Andrea on April 19, 2013 -
chemistry
What is composed of atoms in fixed proportions? A. mixtures B. compounds C. electrons D. elements
asked by junior on September 14, 2010 -
Chemistry
What are transferred in an oxidation-reduction reaction? atoms*** electrons ions protons
asked by Holly on May 19, 2016 -
Physics
How much work must be done to bring three electrons from a great distance apart to 1.0 * 10^(-10)m from one another (at the corners of an equilateral triangle)?
asked by Jenish on February 1, 2008 -
Physics
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
asked by Arnold Manguy on April 19, 2010 -
Biology
What role do high-energy electrons play in the electron transport chain?
asked by Jim on January 12, 2011 -
physics
At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?
asked by kate on March 9, 2009 -
physics
how many electrons must be removed from an electrically neutral silver dollar to give a charge of +2.8 uc
asked by Anonymous on November 18, 2009 -
Chemistry
Determine the maximum number of electrons that can have each of the following designations. 2f,1Py,2Pz,5dyz,6f
asked by Farha on October 28, 2012 -
calculus
A police cruiser, approaching a right –angled intersection from the north is chasing a speeding car that has turned the corner and is now moving straight east. When the cruiser is 0.6 mi north of the intersection and the car 0.8 mi to the east, the
asked by Mr. goodstuff on January 17, 2012 -
physics
Two hockey players strike a puck of mass 0.159 kg with their sticks simultaneously, exerting forces of 1.30 103 N, directed west, and 9.90 102 N, directed 30.0° east of north. Find the instantaneous acceleration of the puck.
asked by pete on February 13, 2014 -
Physics
Two hockey players strike a puck of mass 0.168 kg with their sticks simultaneously, exerting forces of 1.16 103 N, directed west, and 9.90 102 N, directed 30.0° east of north. Find the instantaneous acceleration of the puck.
asked by Abby on September 12, 2017 -
Physics
A pilot wants to fly from city A to city B, a distance of 394 km at an angle of 10.0 degrees west of north. The pilot heads directly toward city B, with an air speed of 203 km/h. After flying for 1.0 hours, the pilot finds she is 17.5 km off course to
asked by Jake on September 27, 2016 -
Calculus
Two cars leave an intersection at the same time. Car X is travelling East at 50 km/hr and Car Y is travelling South at 60 km/hr. Find the rate at which the cars are separating after 30 minutes. I want its complete solution
asked by ChrismB on April 26, 2016 -
maths
Q1) Paul brought a car last year. It has lost 12½% of its value since then. It is now valued at £10,500 How much did Paul pay for his car? -[I got £11812.50... Is that right?~xD] Q2) A newspaper report stated: "Concorde has flown 7.1x10^7 miles. This is
asked by black rose on September 20, 2011 -
english
i need help analyzing this poem by robert frost. what is the theme? emotions? and is the meaning that man is trying to control nature or fix it? THE AIM WAS SONG Before man came to blow it right The wind once blew itself untaught, And did its loudest day
asked by beckii on October 25, 2007 -
Calc 1
Related Rates: Two cars approach the intersection of two highways. The one coming from the west is traveling at 60mph and the one traveling from north is traveling at 50 mph. At what rate is the distance between the cars changing when the car from the west
asked by TayB on October 15, 2015 -
more physics
a 1.00-kg object is observed to accelerate at 10.0m/s∧2 in a direction 30.0 north of east. the force F2 acting on the object has magnitude 5.00 N and is directed north. determine the magnitude and direction of the force F1 acting on the object.
asked by Brandon on March 26, 2010 -
Physics
a 1.00-kg object is observed to accelerate at 10.0m/s∧2 in a direction 30.0 north of east. the force F2 acting on the object has magnitude 5.00 N and is directed north. determine the magnitude and direction of the force F1 acting on the object.
asked by Brandon on March 24, 2010 -
Physics
On a safari, a team of naturalists sets out toward a research station located 4.0 km away in a direction 42° north of east. After traveling in a straight line for 2.3 km, they stop and discover that they have been traveling 30° north of east, because
asked by Harsh Patel on September 15, 2012 -
Chemistry-help needed
I am asked to draw the 'dot and cross' diagram to show the ionic bonding in sodium chloride. I am asked to show only the outer electronic structure. Sodium has 2.8.1 electronic configuration. After losing 1 electron to chlorine, it has 2.8 electronic
asked by carrie on March 26, 2009 -
Math
A plane is flying on a course with a vector of , where the 250 is the speed due north, and the 100 is the speed due east. The wind is blowing where the directions are also north and east, in the same order. How fast is the plane flying? All values are in
asked by April on December 4, 2015 -
physics
A motorist drives south at 26.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.40 min trip, find the following values.
asked by jon on October 5, 2011 -
Calculus
Two cars leave an intersection at the same time. Car X is travelling East at 50 km/hr and Car Y is travelling South at 60 km/hr. Find the rate at which the cars are separating after 30 minutes.
asked by Kaya on April 25, 2016 -
Calculus
Two cars leave an intersection at the same time. Car X is travelling East at 50 km/hr and Car Y is travelling South at 60 km/hr. Find the rate at which the cars are separating after 30 minutes.
asked by Andreyall on April 25, 2016 -
math
OT is a vertical mast of height h. From A, a m due south of O, the angle of elevation of T is 30 degree. If B is a point 2a m from A, on a bearing of 060 degree, find the angle of elevation of T from B.
asked by somay on January 27, 2016 -
College Chemistry
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know
asked by Jena on March 2, 2010 -
Science
Which fact provides the best evidence for the scientific theory of the evolutionary development of life on the earth? a. fossils are found almost exclusively in sedimentary rocks b. characterisitcs of simpler forms of life can be found in more complex
asked by Angie on March 31, 2009 -
PHY101
A 1200kg travelling east collides with another 1000kg car travelling north. If they are both travelling at 90km/h and the collision is completely inelastic, find the velocity of the systemafter collision.
asked by Ebieride on May 17, 2016 -
Social Studies
When the Federal Reserve lowered interest rates following the 2001 recession, what did more people start to do? A. buy homes B. default on loans C. invest in dot-coms D. sell stock shares The United States used diplomacy to broker peace agreements in which
asked by Oof on May 16, 2018 -
Math
There are 61 known moons. Mercury and Venus do not have moons, but each of the 7 other planets has at least 1. How do I find the % of total moons for each planet? Earth - 1 Mars - 2 Jupiter- 16 Saturn - 18 Uranus - 15 Neptune - 8 Pluto - 1 Thanks for your
asked by Spence on February 13, 2008 -
History
what did reconstruction fail to do in south carolina? A.readmit the state to the union B.establish the belief in white supremecy among some group C.return control of state politicsto local leaders D.free african americans from slavery? I Got C but im not
asked by Help me,plz on March 3, 2015 -
chemistry
In the following half equation, which is the oxidizing agent? NO3–(aq) + 4H+(aq) + 3e– NO(g) + 2H2O a. NO3– b. H+ c. e– d. NO e. H2O An oxidizing agent is a chemical compound that readily transfers oxygen atoms, or is a substance that gains
asked by Jason on March 10, 2009 -
College Physics
On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.90 feet tall on earth. She lands on planet Z and is measured to be 94 foosi tall. Her partner Rachael is 88 foosi tall. How tall is Rachael on Earth?
asked by Dylan on February 4, 2012 -
science
Why does the Earth get more energy from the Sun compared to any other star? •The Sun is much closer to Earth. The next closest star is 4.2 light years away. **** • The Sun is much denser than other stars. That means it produces more energy. • The Sun
asked by Taylor P. on October 15, 2017 -
application of differential equation
somebody please help me find the solution totally lost.... An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of
asked by maria on March 21, 2015 -
physics
A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
asked by please help me out!!! please on February 11, 2013 -
PHYSICS
A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
asked by please help me out!!! please on February 12, 2013 -
physics!!!!!!!!!!!!!!!!!
A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
asked by please help me out!!!! on February 13, 2013 -
MATH HELP
Law of Gravitation-find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is negelcted. The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2 Please give
asked by AKUMA on April 28, 2011 -
geography
if you travel westward along the 80th parallel north of the equator from the international Date line to 150 degrees East longitude, how far have you gone in both degrees of longitude and miles? Enter these coordinates in this web site and you'll get an
asked by Marisol on January 30, 2007 -
Physics
A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the
asked by Candice on September 29, 2014 -
Physics
Find g at a point on earth where T = 2.249 s for a simple pendulum of length 1.250 m, undergoing small-amplitude oscillations. (Enter your answer to four significant figures.) CAN YOU PLEASE PROVIDE AN ANSWER WITH WORK . THANK YOU VERY MUCH!!!!!
asked by Mike on January 25, 2013 -
algebra 2
two cars leave an intersection. one car travels north; the other east. when the car traveling north had gone 15 miles, the distance between the cars was 5 mile more than the distance traveled by the car heading east.how far had the east bound car traveled?
asked by amanda on March 18, 2012 -
physics
a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the
asked by jacquie on December 7, 2010 -
physics
a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the
asked by jacquie on December 7, 2010 -
math
An airplane leaves Atlanta at 2 PM and flies north at 250 miles per hour. A second airplane leaves Atlanta 30 minutes later and flies north at 280 miles per hour. At what time will the second airplane overtake the first? Answer Choices 6:20 PM 6:00 PM 6:40
asked by Zara on October 30, 2016 -
Solved-Calculus-Please check?
the equatorial radius of the earth is approximately 3960 miles. suppose a wire is wrapped tightly around the earth at the equator. how much must this wire be lengthened if it is to be strung on 10 feet poles above the ground? (1 mile=5280 feet) delta y=
asked by Liliana on April 24, 2013 -
Please Please help! English
Which of the following sentences DOES NOT illustrate subject- verb agreement. 1.Each of the players need a locker. 2.He said that the computer is broken. 3.There go the members of the cast. 4.We knew that rivers flow south. 1.Each of the players need a
asked by Anonymous on October 14, 2006 -
science - physics
A plane flies with a velocity of 52 m/s east through a12 m/s cross wind blowing the plane south. Find the magnitude and direction (relative to due east) of the resultant velocity at which it travels.
asked by michelle on September 28, 2011 -
Math
Mercury's average distance from the sun is 57,910,000 km. The Earth is approximately 93,000,000 miles from the sun What would be the distance of a trip from Mercury to Earth, via the Sun. Look out for the units!!! (1 km =(0.62mi) Use Scientific Notation to
asked by Howayda on January 10, 2016 -
chemestry
Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please
asked by bik on May 16, 2007 -
Science
Please unscramble this word snagenhhi P.s it's a type of snake and its found in NorthAmerica I checked this list of North American snakes and didn't find any with two h's in its name. http://www.pitt.edu/~mcs2/herp/SoNA.html if the h's are k's, then king
asked by Fia on April 8, 2007 -
7th Grade Math
The weight of an object on the moon varies directly as the weight of the object on Earth.A 90-pound object on Earth weights 15 pounds on the moon.if an object weights 156 pounds on Earth, how much does it weights on the moon? A.23 pounds B.26 pounds C.28
asked by I dont get this :/ on August 13, 2017 -
Math
Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different
asked by Tisha on April 7, 2010 -
Science Physics
An object weighs 12 N on earth. When it is brought to Mars, it has a weight of 4.8 N. What is the acceleration due to gravity on Mars? (Taking the acceleration due to gravity on earth is 10 m/s²)
asked by Sarah on April 1, 2013 -
physics
At the surface of Jupiter's moon Io, the acceleration due to gravity is 1.81 . A watermelon has a weight of 43.0 at the surface of the earth. In this problem, use 9.81 for the acceleration due to gravity on earth
asked by Anonymous on February 21, 2011 -
physics
Two satellites are monitored as they orbit the earth,satellites Y is foure times as far from earth's centre as is satellite X. IF the period of revolution of satellite X is T. WHAT IS THE PERIOD OF REVOLUTION OF OF Y?
asked by barch on November 14, 2015 -
Physics
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g Find the reading of the spring
asked by Mike on January 25, 2013 -
physics
An astronaut in full gear has a weight of 2900 N on Earth. Jupiter; weight on planet relative to earth is 2.53 and weight of a 150-lb person is 380. How much will the astronaut weigh on the Jupiter? W_{Jupiter} =________________ N Neptune; weight on planet
asked by Melissa on March 3, 2014 -
Physics
A police car is traveling at a velocity of 20.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the
asked by Peanutbutter7 on September 27, 2014 -
physics
A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 45.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 3.00 m/s^2. Including the
asked by colby on September 7, 2012 -
Physics
A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the
asked by Tonya on September 16, 2013 -
Physics
A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 40.0 m/s due north. After a reaction time 0.500 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the
asked by Kaitlyne on September 10, 2013 -
physics
A police car is traveling at a velocity of 15.0 m/s due north, when a car zooms by at a constant velocity of 44.0 m/s due north. After a reaction time 0.700 s the policeman begins to pursue the speeder with an acceleration of 5.00 m/s^2. Including the
asked by louis aaaa on June 18, 2013 -
physics
A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 49.0 m/s due north. After a reaction time 0.600 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/s^2. Including the
asked by Katy on September 15, 2013 -
Chemistry
Shown below are several options for the box notations of the ground state electron configuration of the following gas-phase species. Identify the correct electronic configuration. i. Al2− ii. Mn (a)Select the reason that best explains why the first
asked by c on January 11, 2013 -
english help please!!
Read the following excerpt from H.G. Wells' The War of the Worlds, and answer the question that follows: The planet Mars, I scarcely need remind the reader, revolves about the sun at a mean distance of 140,000,000 miles, and the light and heat it receives
asked by Oscar on March 14, 2016 -
algebra
1.) The volume of a rectangular box is 64 ft3. If the width is 3 times longer than the height, and the length is 9 times longer than the height, find the dimensions of the box. Define your variables then show all work using the equation editor. Write a
asked by ashley on August 10, 2016 -
english
Please help if my answers are correct and let me know the correct answers below. thank you. Can we see (1) _____ the earth is a globe? Yes, we can. When we watch a ship that sails out to sea, we can see that the ship begins (2) _____. The bottom of the
asked by jessie on April 28, 2017 -
Physics
A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was
asked by Emily on December 10, 2010 -
Physics
A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was
asked by Emily on December 10, 2010 -
Physics
Show that the total mechanical energy of a satellite (mass m) orbiting a distance r from the center of the Earth (mass M-e)is: -(1/2)*(G m M-e)/(r if U = 0 at r = infinity. Show that although friction causes the value of E (mechanical energy) to decrease
asked by Anonymous on March 21, 2008 -
physics
A spring scale being used to measure the weight of an object reads 12.8 N when it is used on earth. The spring stretches 4.95 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g. Find the reading of the
asked by Anonymous on March 28, 2011 -
chemistry
1. Calcuate the distance(km) from the Earth to the Moon if it takes light 1.3 seconds to make the trip? 2. Saturn is about 1.2 billionkm from Earth. How long does it take light to travel that distance? (I was only given the wave equation, Max Plancks
asked by Brooke N on November 11, 2015 -
algebra
A pilot heading his polane due north finds the actual direction of travel to be 5.2 NE. The planes's air speed is 315 mi/h, and the wind is from die west. Find the plane's ground speed and the velocity of the wind.
asked by Arielle on November 2, 2011 -
physics
a woman walks 250 m in the direction 30 degree east of north,then 175 m directly east.A) using graphical methods,find her final displacement from the starting point.B) compare the magnitude of her displacement with the distance she walked.,
asked by mark paul on July 4, 2011 -
History
I have multiply questions and would appreciate if you could either tell me about it or send me a link to something, I've checked my history books and can't find nothing. Who didn't like Lincoln's 10% reconstruction plan? Did Lincoln's death impact or
asked by Toad-Stool on April 25, 2018 -
trig
a plane is flying with airspeed of 140 mph and heading 280 degrees. The wind currents are running at 20mph at 260 degrees clockwise from due north. Find the true course and ground speed of the plane.
asked by Frankie on August 19, 2011 -
Social Studies
One reason for the difference between average temperatures in Rome when in Jan. the average temperature is 11 degrees Celsius and July average degree is 30 degree Celsius is: The amount of carbon dioxide present in the atmosphere The tilt of the Earth of
asked by Sue on October 22, 2014 -
Chemistry
Here are the effective nuclear charges, Zeff, for the valence electrons of four different atoms. 1.30, 1.95, 2.60, 3.25 In order, these values could belong to what list of elements? Sr, Ca, Mg, Be Be, Mg, Ca, Sr C, B, Be, Li (or) Li, Be, B, C Here are the
asked by marie darling on April 2, 2013 -
English
Thank you very much for your corrections. I still have a few alternatives for you to check. 1) The demand for new clothes created the necessity (better: caused the development of new machinery?) to invent machinery for cloth-making. 2) New factories were
asked by Franco on November 26, 2010 -
Trig application
I am having trouble with this question. A privately owned yacht leaves a dock in Myrtke Beach, South Carolina, and heads toward Freeport in the Bahamas at a bearing of S 1.4 degrees E. The yacht averages a speed of 20 knots over the 428-nautical- mile
asked by Hutch on February 21, 2015 -
Pre-Calculus
Point B is 12 km north of point A. Point C is 9 km from point B on a bearing of 060°. Find the distance from A to C.
asked by Gabby on January 14, 2013 -
Physics
At the surface of a certain planet, the gravitational acceleration g has a magnitude of 12.0 m/s^2. A 21.0-kg brass bell is transported to this planet. What is (a) the mass of the brass ball on the Earth and on the planet, and (b) the weight of the brass
asked by Luce on November 4, 2016 -
Geometry
A city has a scale model of the solar system nearly 6 km long. The model's scale is 1 km : 1 billion km. a. Earth is 150,000,000 km from the Sun. How many meters apart are Earth and the Sun in the model?
asked by Anonymous on December 31, 2011