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.

100,421 results, page 75
1. physics

A motorist A leaves a small town and drives East at 28 ms-1 . A second motorist B is driving South towards the same town at 23 ms-1 . Draw a diagram and find the velocity of motorist B relative to motorist A? ( VB REL A ) is this just phythagoras and

asked by jp on August 22, 2014
2. history

Can someone give me links for these please? Describe the military strategy that General William T. Sherman used across Georgia and South Carolina. Explain how the strategy affected the south, as well as how southerners reacted. Explain the purpose of

asked by Alexis on May 11, 2016
3. trig

a tower standing on level ground is due north of piont N and due west of point W, a distance 1,500 feet from N. If the angles of elevation of the top of the tower as measured from N and W are 8 and 11, respectively, find the height of the tower.

asked by courtney on October 9, 2011
4. ship problem

A [B]ship P [/B] is travelling due [B]East at 30 km/h[/B] and a [B]Ship Q[/B] is travelling due [B]South at 40 km/h. [/B] Both ships keep constant speed and course. [B]At t=0 they are each 10 km [/B] from the point of intersection of their courses and

asked by rav on July 15, 2006
5. Physics

(II) Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 5–44. The masses are mV = 0.815 mE, mj = 318 mE,

asked by clay on October 2, 2014
6. Science help

India : Duck Australia : Duck South Africa : Duck, Goose Africa : Duck Cat Antarctica: Duck Goose cat If scientist wanted to argue that South Africa, Africa, and Antarctica was once connected, which animals would they use to determine that? Would it be

asked by Chopsticks on April 1, 2009
7. Geography (Ms. Sue)

1). How are the landforms of Europe both an advantage and a disadvantage to life in Europe? A: The landforms of Europe are an advantage as these landforms affect the climate in their favor. However, the mountains and uplands, for example, may be viewed as

asked by Anonymous on September 27, 2013
8. sci

1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

asked by ray on November 3, 2011
9. sci

1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

asked by ray on November 3, 2011
10. History

1. What were the Townshend Acts? (1 point) -The British put taxes on imported goods such as tea and glass. (answer) -The British put taxes on hotels and other lodging accommodations. -The British put taxes on newspapers, magazines, and official licenses.

asked by Anonymous on October 8, 2014
11. Social Studies

What do many of the political conflicts in South Asia have in common? I think that many of the political conflicts in South Asia are based off of conflicting religions. In the past there have been many rivals between Hindus and Muslims, which causes much

asked by Scarlet on May 7, 2016
12. History

I need help finding 3 of the principals of economics from the passage below. The principals are people choose, all choices involve cost, and people respond to incentives. The passage: One of the first books, written in 1866, on the civil war was written by

asked by Meg on September 18, 2017
13. English

Busan is the largest port city and second-largest city in South Korea. It lies on the southeast tip of the Korean Peninsula. It is important for transport and shipping. It is best known for Busan Port and Haeundae Beach. The port takes many ships and

asked by rfvv on May 24, 2016
14. physics

Your English teacher can swim with a constant speed of 0.67m/s. While facing south , he attempts to swim straight across the St. Lawrence River , which moves east at 1.4 m/s a) find his velocity as seen from the riverbank. B) if the river was 175m wide How

asked by Melissa on June 14, 2012
15. 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 G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated. Do i have to add the

asked by Malcom on March 30, 2009
16. algebra

Write a formula that relates temperature t in degrees Fahrenheit at altitude h (in thousands of feet) and a ground temperature of 65ºF. State any restrictions on h. b. Find the temperature at 11,000 ft above Earth’s surface.

asked by Hailey on October 16, 2012
17. Social studies

In which might the Spanish choice to claim North America land be considered controversial? A> Spanish explorers promised to free the slaves of North America. B>Spanish explorers failed to convert native people to Christianity. C> Spanish explorers seized

asked by HELP I'M STUCK on November 20, 2017
18. algebra

You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the

asked by darlene on November 30, 2014
19. History

Which describe major achievements of Ferdinand Magellan’s exploration efforts? (Select all that apply.) Magellan proved the earth was round and could be sailed. Magellan proved the earth was much larger than expected. Magellan discovered the Incan Empire

asked by Rylee on November 29, 2017
20. physics

Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out

asked by john on September 16, 2010
21. PHYSICS-HELP!!

Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out

asked by JENNA on September 16, 2010
22. Geography

Review the cities located within the following longitude and latitude coordinates: 70-80 West Longitude and 30-40 North Latitude. Next, consult your local newspaper or other resource for the weather in these cities. Choose one of the cities found within

asked by surfsupmel on April 28, 2011
23. physics

If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)

asked by Andy on October 11, 2009
24. Physics

Speed of a satellite orbit (physics problem)? What is the speed of a satellite in a geosynchronous orbit about Earth? _________m/s Compare it with the speed of the Earth as it orbits the Sun. _________m/s

asked by Sierra on June 29, 2012
25. Math

The weight of an object on the planet Mercury is about 2/5 the weight of that object on the Earth. An object that weighs 30 pounds on Earth would weigh how many pounds on Mercury? Need solution because I think it is 7.5 but my parents think the answer is

asked by Michael on February 7, 2012
26. physics

Earth of mass 6×10^24 kg is in motion around the sun with a linear velocity of magnitude 30 km/s. a) Determine the magnitude of the linear momentum of the center of mass of Earth. b) Is this linear momentum conseved?

asked by angy on September 30, 2016
27. Science

Why is only one side of the moon visible from the earth at all times? Only one side of the moon is visible from the earth at all times because the other side is illuminated by the sun, which doesn't face us. Please correct me if I'm wrong, thanks :-)

asked by Sara on February 10, 2010
28. physics

If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)

asked by Andy on October 11, 2009
29. physics

an object of 3 kg is dropped from 2m above the ground. it takes a time interval of tE to reach the ground of the earth. if it is dropped on the moon, how long does it take to reach the ground? the a dure to g on the moon is 1/6 of that on the earth.

asked by kylie on October 24, 2010
30. physics

Why do we not see a lunar eclipse during each full moon when the earth is in between the Sun and the Moon? Does it depend on the seasons? I looked this up online, and it seems like there is always a lunar eclipse when the earth is between the Sun and Moon

asked by tyger2020 on November 28, 2018
31. algebra

an astronaut who weighs 85 kilograms on the earth weighs 14.2 kilograms on the moon. how much would a person weigh on the moon if they weigh 95 kilograms on earth? round your answer to the nearest tenth.

asked by kelvon on September 16, 2014
32. Science

1. Which statement about subatomic particles is NOT true? (1 point) Protons and neutrons have almost the same mass. Protons and electrons have opposite charges. Unlike protons and electrons, neutrons have no charge. Protons and neutrons have the same

asked by Chelsea on October 10, 2008
33. Social Studies

My most exalted Monarch - Your Majesty Queen Isabella, I am writing this letter most humbly for you to consider my request for three small ships and a crew so that I may sail west and find the shortest route to the East. I promised to chaim land for Spain

asked by Laruen on November 17, 2011
34. chemistry

Which of the statements correctly describes the reactivity of noble gases, according to the octet rule? They have eight electrons in their valence shell, so noble gases are very unreactive. They have eight electrons in their valence shell, so noble gases

35. Science

if an atomic nucleus were the size of a dime how far away might one of its electrons be? A. 1 foot B. 1 inch*** C. 1 yard D. 1 mile My answer (***)

asked by kaz... on February 2, 2018
36. Honors Chemistry

Due to the screening effect, the 3s electrons of magnesium (Mg) feel an effective nuclear charge (Zeff) of: 1. +1 2. +2 3. −2 4. +12 5. +4

asked by Bill on September 15, 2010
37. chemistry

In the redox reaction: 4NH3(g)+3O2(g)-->2N2(g)+6H2O(l) the number of moles of electrons transferred is...

asked by Metia on May 3, 2010
38. Chemistry

The ion formed by IODINE has electron configuration that resembles a. Te b. Kr c. Xe d. Br e. we cant know unless told whether it gains or loses electrons

asked by Sarah on November 1, 2009
39. physics

calculate the net charge on a substance consisting of a combination of 3.0X10^13 protons and 8.6X10^13 electrons.

asked by jandy on April 16, 2012
40. chemistry

What is the total number of nonbonding valence electrons in the "dipolar ion" form of glycine, +NH3CH2COO-?

asked by Erika on October 3, 2008
41. Justin

If 2.00 X 10^20 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved through it?

asked by physics on August 19, 2013
42. chemistry

Which of these ions have five d electrons in the outermost d subshell? Mn2+ Fe2+ Re2+ Y2+ Tc2+ Zn2+ Ru2+

asked by Katie on March 30, 2012
43. chemistry

for an oxygen atom,wich requeres more energy,the addition of two electrons or the removal of one electron?explain why

asked by kabelo on September 19, 2010
44. chemistry

An electroplating cell operates for 35 min with a current of 1,9 A. Calculate the amount, in mols, of electrons transferred.

asked by Alex on April 20, 2008
45. chemistry

what feature of rutherford's model has appeared in all later models of atom? Is it that electrons are outside, or does it have to do with alpha/gamma rays?

asked by Anonymous on April 12, 2009
46. Science

Electrons involved in a _____ bond are shared unevenly. metallic double polar nonpolar

asked by Raelyn on March 12, 2013
47. Physics

If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have?

asked by Steven on April 8, 2009
48. physics

Calculate the net charge on a substance consisting of a combination of 8.9 × 10 13 protons and 4.4 × 10 13 electrons. Answer in units of C

asked by ivan on February 26, 2012
49. Science

During beta-particle emission, a neutron splits into a proton and an electron two protons two electrons two neutrons

asked by Sophia on March 6, 2012
50. 9th Chemistry

Why is there a big space in the periodic table between the 2nd & 3rd periods? The activity of the electrons is related somehow.

asked by Marie on November 8, 2009
51. Science

If an atomic nucleus were the size of a dime how far away might one of its electrons be? A. 1 foot B. 1 inch*** C. 1 yard D. 1 mile My answer (***)

asked by kaz... on February 2, 2018
52. chemistry

How many electrons are in the highest occupied energy level of these atoms? Na(sodium) Al (aluminum) F(fluorine) C(carbon)

asked by james on February 8, 2012
53. L0velyLayna

Electrons involved in a ( BLANK ) bond are shared unevenly. Nonpolar Polar Double Metallic

asked by 8th Science on March 8, 2013
54. Physics

How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789

asked by Cynthia H. on January 13, 2016
55. biology

Draw a picture of the structure of an atom that includes all the following: protons, neutrons, electrons, nucleus, orbitals

asked by anonymous on November 20, 2013
56. Chemistry

How many lone pairs does Cl- have? I can draw it using a cross and dot diagram but not sure if it would have 4, or 3 as one of the electrons has been added from somewhere to make it an ion? Thank you!

asked by Rebecca on May 10, 2017
57. Physics

How many electrons pass a given point in the circuit in 17 minutes? The fundamental charge is 1.602•10^-19. And the current is 0.526315789

asked by Cynthia H. on January 13, 2016
58. Organic Chemistry

What is the mechanism of action between sodium benzoate (NaC6H5COO) and hydrochloric acid (HCl)? I need to know where the electrons go in this reaction.

asked by BOB on October 11, 2011
59. chem

Ammonia is very soluble in water. Why? NH3 has a pair of unpaired electrons to which a hydrogen ion can add.

asked by anees on April 16, 2007
60. Physics

How much charge is contained in 9kg of electrons? Express your answer to two significant figures and include the appropriate units.

asked by James on January 24, 2014
61. chem

Write the condensed electron configurations for the following atoms and indicate how many unpaired electrons each has. for Ca and Y for Ca i got [Ar] 4s2 but it got cuonted wrong

asked by Samantha on November 18, 2012
62. chemistry

What is the total number of nonbonding valence electrons in the "dipolar ion" form of glycine, +NH3CH2COO-?

asked by Nathan on October 4, 2008
63. science

I have read over 20 sites and I still cant figure this one out - in an atom electrons are located in energy levels that are a certain distance from the nucleus.

asked by sam on November 3, 2007
64. Solid State Physics

At room temperature, do metals have a noticeably higher heat capacity than insulators because of the mobile electrons?

asked by curiousmind on November 12, 2018
65. chemistry

This statement is writing in my textbook can someone please explain to me what it mean: Determining the position of electrons, eliminates their wave properties.

asked by lo on June 26, 2016
66. physical science

compare the postions of the electrons in Bohr's model of the atom with their positions according to modern atomic theory

asked by taylor on October 15, 2008
67. chemistry

Silver is electroplated at the cathode of an electrolysis cell by 1/2 reaction Ag(aq) + e- --> Ag(s). How many moles of electrons are required to electroplate 5.8g of Ag?

asked by Ashley on November 30, 2011
68. chemistry

How do the lewis structure and the positions of valence electrons affect the shape of the covalent compound? This is something for my lab

asked by Lola on January 25, 2010
69. To Dr.Bob222

Is the answer for the nine protons and 10 electrons thing F^1- Yes, I answered to that effect at the original post. Its the fluoride ion.

asked by Googly Eyez on October 15, 2006
70. physics

calculate the free electrons of a copper wire having a 0.064 inches diameter and 1000 ft. long?

asked by vic on January 20, 2011
71. physics 30

Draw a scenerio with a magnet and the solenoid below that would induce a flow of electrons to the right of the page in the ammeter, as shown below.

asked by sarah on March 21, 2012
72. Chemistry

Which of the following compounds has an atom with an unfilled valence shell of electrons? A) H3O+ B) BF3 C) CH3OH D) NaI

asked by Veronica on September 29, 2016
73. Chemistry

When the oxidation-reduction reaction shown here is balanced, how many electrons are transferred for each atom of copper that reacts? Ag^+ + Cu = Ag + Cu^2+

asked by Danielle on June 26, 2012
74. chemistry

how would I determine the hybridization of the carbon atom if it has 3 single bonds with hydrogen and no free electrons? Do I draw this out??

asked by ~christina~ on August 31, 2007
75. Science

What is the difference between compounds, mixtures, and elemennts? Better off what do all of them mean? DO you know what type of microscopes are used to see atoms and protons and electrons along with neutrons? PLEASE HELP!

asked by Mary on October 16, 2008
76. Chemistry

If your body develops a charge of -19 (microcoulombs), how many excess electrons has it acquired? What is their collective mass? Please explain how to do this

asked by Jackie on September 7, 2011
77. physics

How many excess electrons are there in a typical lightning bolt that has about 16 C of charge? Answer 1 x 1020 1 x 1019 10 1 x 1016

asked by m on April 7, 2014

Two nitrogen atoms are separated by 4 cm. Each atom has 2 extra electrons. What is the force between them? is it attractive or repulsive? Explain.

asked by Anonymous on January 20, 2013
79. chemistry

what are the favored geometrical arrangements for ABn molecules for which the A atom has 2, 3, 4, 5 and 6 pairs of electrons in in its valence shell?'

asked by priscilla on April 14, 2015
80. science help.. pls help me dr.bob22 or damon

Dalton's ideas that atoms cannot be divided into smaller parts was disproved by the discovery of the_____ is it electrons

asked by Oscar on March 31, 2015
81. Chem

Determine the number of protons and electrons in each of the following ions. Na+ Enter your answers numerically separated by a comma. Np, Ne =

asked by James on September 5, 2014
82. chemistry

what are the favored geometrical arrangements for abn molecules which the A atom has 2, 3, 4, 5 and 6 pairs of electrons in its valence shell?

asked by Mai on March 31, 2014
83. Science

Why are metals good conductors of heat and electricity? Does it have to do with their valence electrons or the atomic packing factor?

asked by Kim on September 8, 2018
84. Chemistry

How many moles of electrons are involved in an electrolytic process if 3.07 amps are applied to the cell for 46.0 hours? The answer is 5.27, but I'm not sure how to get there. Please help!

asked by Lilac on December 3, 2014
85. Science (Physics)

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is

86. vjs jagdalpur

A positively charged particle projected towards west is deflected towards north by a magnetic field. State the direction of magnetic field. Which rule did you use to find direction?

asked by shivangi on September 26, 2015
87. Trig

A ship leaves port at 6 am and heads due east at 20 knots. At 10 am, to avoid a storm the ship changes course to N 47° E.. (47° east of north). Find the ships distance from port at 4 pm.

asked by Isaac on November 16, 2015
88. trigonometry

A plane is headed due west with an air speed of 300 mph. The wind is from the north at 80 mph. Find the bearing for the course and the ground speed of the plane.

asked by mikey on November 27, 2012
89. vjs jagdalpur

A positively charged particle projected towards west is deflected towards north by a magnetic field. state the direction of magnetic field. Which rule did you use to find direction?

asked by shivangi on September 26, 2015

Where can I find a complete description about North American racial ideologies from 1500 to 1830 and their effects on Latin American Racial ideologies? Does this mean the transition from slavery to freedom?

asked by anonymous on September 2, 2009
91. physics

How do i find this? A shooting star is a meteor that burns up when it reaches Earth's atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 45 km/s and compare it to the kinetic

asked by raina on April 4, 2010
92. physics

Find the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×1023kg), when Mars is at its closest to Earth (distance = 5.6×1010m).

asked by bob on February 2, 2014
93. Algebra

w=Cr^-2 Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the earth.)

asked by Marysvoice on January 28, 2008
94. Physics

A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s and accidentally drops a bomb (fortunately not armed) at an elevation of 350 m. You can ignore air resistance. Find the horizontal and vertical components of its

asked by Michelle on October 21, 2012
95. Physics

An airplane pilot sets a compass course due west and maintains an airspeed of 221km/h . After flying for a time of 0.490h, she finds herself over a town a distance 125km west and a distance 13km south of her starting point. FIND THE MAGNITUDE OF WIND

asked by Jenna on September 26, 2011
96. English

Can you check these sentences for me, please? 1)He is a superstar now and he is slamming (a synonym?) on his guitar. 2)He is responsible for the building (?) of Westminster Abbey. 3)He withdrew from Britain to defend Rome against (or from?) a Barbarian

asked by Franco on February 16, 2010
97. Math

Earth weight is 5.9736 x 10^24 Kg and Venus is 4.8685 x 10^24 Kg. What is the combined weight of Earth and Venus ? a)10.8421 X 10^26 Kg b)10.8421 x 10^23 Kg c)10.8421 x 10^25 Kg d)1.08421 x 10^25 Kg

asked by asdflk;jasdfla;kjsdfl; on January 13, 2016
98. math

Earth weight is 5.9736 x 10^24 Kg and Venus is 4.8685 x 10^24 Kg. What is the combined weight of Earth and Venus ? a)10.8421 X 10^26 Kg b)10.8421 x 10^23 Kg c)10.8421 x 10^25 Kg d)1.08421 x 10^25 Kg

asked by victoria on September 11, 2013
99. math

an object that weighs 234lb on jupiter weighs 100lb on earth. what would an object that weighs 400 lb on jupiter weigh on earth?

asked by linda on January 31, 2011
100. Physics

Add the two component vectors from Sample Problem 1 algebraically to erify that they equal the given vector The two component vectors are: 8.6m(North) and 12m (west) The given vector is 15m(West 35 degrees North) Because when i add 8.6 and 12 it doesnt

asked by Jake on September 30, 2014