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

    asked by please help on August 29, 2017
  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
  78. PHYSICS PLEASE HELP!

    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

    asked by Ahmad on November 18, 2013
  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
  90. 10th grade

    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