1. chemistry - atoms

    Understanding Chemical Bonding This is a short activity to introduce you to the concept of chemical bonding. In this activity, you will take the number of your birth month as your atomic number. Using this information, you will be able to determine the
  2. physics

    A wind is blowing directly from east to west. The pilot of a small plane finds that if he points the nose of the plane 30.0 ° north of east, his velocity with respect to the ground is in the direction 55.1 ° north of east. The speed of the plane with
  3. cpcc

    a small plane is traveling due south a t a velocity of 90 m/s. It suddenly encounters a tailwind of 27 m/s heading due south. what is The "air velocity" of the plan stays the same....but what is the resultant velocity (aka..."ground velocity") of the
  4. physics

    Peggy drives from Cornwall to Atkins Glen in 37 min. Cornwall is 74.8 km from Illium in a direction 22¡Æ west of south. Atkins Glen is 24.6 km from Illium in a direction 18¡Æ south of west. Use Illium as your origin. Find the displacement during the
  5. 7th Grade Math

    Write one or two equations to represent the situation below. Solve the equation(s). Show all your work. Two cars leave town going in opposite directions. The car heading north travels at 55 mph. The car heading south travels at 75 mph. How long will it
  6. science

    a boat heading due north crosses a wide river with speed of 12km/h relative to the water the water in the river has a uniform speed of 5 km/h due east relative to the earth.determine the velocity of the boat relative to an observer standing on either bank
  7. History

    Which best describes the languages spoken by American Indians in South Carolina? All tribes in South Carolina spoke the same language Most American Indians spoke Algonquian or Siouan. American Indians spoke more than fifty languages Most tribes spoke of
  8. Science

    Explain the law of motion needed to solve this problem and then solve it. On Planet Zorg a 30 kg barbell can be lifted by only exerting a force of 180 N. What is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change
  9. History

    This was one of my few questions that i was struggling with. A) Describe the growth of North American slavery from 1619 to 1789. Include the status of the first Africans in North America, laws later established to govern them, and the reasons why planters
  10. History

    Which geographic locations did the Arab Empire control through the year AD 750? italy, France, Hungary, Czech Republic, and Slovenia spain (Iberia), North Africa, and the near east eastern European, Russia, and North Asia rwanda, congo,angola, zambia, and
  11. math - integers

    1. Freddy lives 34kms south of Makati City while Misael lives 34kms north of Makati City. How far is Freddy's place from Misael's place?
  12. Physics

    A novice pilot sets a plane's controls, thinking the plane will fly at 2.50 * 10*2 km/h to the north. If the wind blows at 75 km/h toward the southeast, what is the plane's resultant velocity? Use graphical techniques please show me how to solve this. the
  13. social studies

    What did the national government agreed to do to ensure the election of Rutherford B. Hayes ? a) remove federal troops from the south b) put restrictions on the voting rights of blacks c) provide tax money to rebuild the south after the war d) send troops
  14. Science

    Describe the plant life, animal life, and geology of the ecosystem in South Carolina. What populations and communities are present? How dependent is South Carolina on this ecosystem?
  15. geometry

    A glider lands 18 miles west and 5 miles south from where it took off the result of the trip can be described by the vector (-18,-5) use distancs for magnitude and direction to describe this vector a second way. I believe its south of west but not sure if
  16. Chemistry

    6. Which one of the following statements about chemical bonding is not correct? a) Ionic bonding occurs when one atom donates electrons to another. b) When atoms bond, the resulting compound is of a lower energy state than that of the combining atoms. c) A
  17. math

    Carrie and Krystal are taking a road trip from Greenville to North Valley . Each person has her own map,and the scales on the map are different. A.On Carrie's map, Greenville and North Valley are 4.5 inches apart.The scale on her map is 1 inch=20 miles.
  18. physics

    n automobile has a vertical radio antenna 1.40 m long. The automobile travels at 30.0 km/h on a horizontal road where Earth's magnetic field is 50.0 µT, directed toward the north and downward at an angle of 65.0° below the horizontal. (a) Specify the
  19. Physics

    please check these for me Which of the following is not a fluid? a. carbon dioxide b. hydrogen c. seawater d. wood D Which of the following statements is not correct? a. a fluid flows b. a fluid has a definite shape c. molecules fo a fluid are free to move
  20. Math

    The approximate distance of the moon from Earth is 4 x 105 km and the average approximate distance from the Earth to Venus is 4 x 107 km. How much farther is Venus from Earth than the moon?
  21. History/ Civics

    1.How did the capture of Vicksburg, Mississippi, take advantage of a Confederate weakness? A-The Confederacy had few soldiers and relied on its well-trained generals to win battles. B- The Confederacy had few weapons manufacturers and relied on Vicksburg
  22. physAH!

    A car that is initially at rest moves along a circular path with a constant tangential acceleration component of 2.07 m/s2. The circular path has a radius of 42.4 m. The initial position of the car is at the far west location on the circle and the initial
  23. physic

    Find the force a 67.5 kg man would experience while standing in the surface of each of the following planets PLANET 1. EARTH 2. MARS 3. PLUTO Mass for earth 5.98 x 10^24 kg for mars 6.34 x 10 ^23 kg for pluto 5 x 10^23 kg distance distance for planet 6.337
  24. maths

    a hiker walk due east at 4km per hour and a second hiker starting from the same point walks 55 degree north-east at the rate of 6km per hour. H ow far apart will they be after 2 hours. this is my ques but .i am having problem that if the hiker walks 55
  25. Social Studies

    4. Which of the following would describe a reason the British government planned to take the South in the Revolutionary War? A. The British people were tired of the war's expenses. B. They believed the Indians would join forces with them against the
  26. physics

    the 900 kg car was traveling south and collided with the 2000kg car traveling west. they both got tangled and moved away from the impact point as one mass at 16.0m/s in the direction 24degrees west of south. what was the initial speed of each prior to the
  27. Physics

    You are on a treasure hunt and your map says "Walk due west for 52 paces, then walk 29.6° north of west for 40 paces, and finally walk due north for 25 paces." What is the magnitude of the component of your displacement in the following directions? (a)
  28. physics

    1) You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^-19 C, m=
  29. History

    How did human history in North America during the period described in the prologue differ from the events of Asia, Eurasia, and Europe? How were these differences important to the international state of affairs in 1450 How was North American history
  30. CHEMISTRY HELP !!!! CHECK !!!

    Al3+ is reduced to Al(s) at an electrode. If a current of 2.75 ampere is passed for 36 hours, what mass of aluminum is deposited at the electrode? Assume 100% current efficiency. a. 9.2 x 10–3 g b. 3.3 x 101 g c. 9.9 x 101 g d. 1.0 x 102 g e. 3.0 x 102 g
  31. maths

    hi, need help in below problem. thanks. A cruiser which can steam at 48 km/hr received a report that enemy vessel, steaming due north at 32km/hr, is 46 km away in a direction 30 degrees north of east. show graphically or by calculation , that the cruiser
  32. Science Physics

    You walk 30 m south and 30 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically
  33. physics

    A women walks 2m in the direction 60degrees north of east. find her final displacement.
  34. physics

    A women walks 2m in the direction 60degrees north of east. find her final displacement.
  35. Physics (Classical)

    John and Mary are skating at an ice rink. John skates at a constant speed of 6.7 m/s, with respect to the ice surface, directly south. Mary skates at a constant speed of 11.5 m/s in a direction of 34° west of south, with respect to the ice. What are the
  36. physics

    A person walks 11.0° north of east for 3.30 km. How far due north and how far due east would she have to walk to arrive at the same location?
  37. Physics

    A person walks 15.0° north of east for 3.70 km. How far due north and how far due east would she have to walk to arrive at the same location?
  38. Physics

    A person walks 23.0° north of east for 2.60 km. How far due north and how far due east would she have to walk to arrive at the same location?
  39. Astronomy

    1.If you mande a model of the solar system with the Earth. The size of a tennis ball [about 6.5c.m in diameter] How big would your model of the sun be? 2.How far away from the tennis ball Earth would your model Sum be.If you kept the size and distance to
  40. Spanish

    The following paragraph describes what some may consider to be a typical North American tourist. It reflects one opinion only. North Americans whovisit foreign countries do not commonly fit this description. Read the paragraph. Then write your answersin
  41. Math 8th Grade Please help

    The radius of Earth is 6,371 kilometers. A space shuttle orbits 315 kilometers above the surface of Earth. The space shuttle completes 240° of a revolution around Earth in one hour. What is the average speed of the space shuttle? Choose the closest
  42. physics

    Using Newton's Law of Universal Gravitation, compare the effect of the Sun and the Moon on the tides. Constants: Mass of the Moon, M☽= 7.348E22 kg. Moon's semi-major axis, a☽= 3.844E8 m. You can find the other constants you will need on the
  43. Humanities

    Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and
  44. One more thing!

    Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earth-bank, where a dim and little traveled trail led eastward through the fat spruce timberland. It was a steep bank, and he
  45. Social Studies CHECK MY ANSWERS

    How did Congress react when it discovered Black Codes in the South? A.It enacted stricter Reconstruction plans. B.It created public schooling. C.It increased the number of sharecroppers in the South. *** D.It called for the impeachment of Andrew Johnson.
  46. math

    two look out situations, which are 25 miles apart along the coast on a north-south shoreline, spot an approaching yacht. One lookout station measures the direction to the yacht at N33 degrees E, and the other station measures the direction of the yacht at
  47. trigonometry

    2. two look out situations, which are 25 miles apart along the coast on a north-south shoreline, spot an approaching yacht. One lookout station measures the direction to the yacht at N33 degrees E, and the other station measures the direction of the yacht
  48. Science

    a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration
  49. Chemistry

    1)How many protons and electrons are in a sulfate ion SO4^2- ? I know the answer is 48 protons and 50 electrons but i do not know how to get this from the ion. 2) What is the charge on a sulfide ion? The answer is -2 but im not sure why. Is sulfide always
  50. Chemistry(Please help)

    1)How many protons and electrons are in a sulfate ion SO4^2- ? I know the answer is 48 protons and 50 electrons but i do not know how to get this from the ion. 2) What is the charge on a sulfide ion? The answer is -2 but im not sure why. Is sulfide always
  51. science

    which is an example of covalent bond? a.chlorine accepts an electron from calcium b. lons in a bar of pure iron are surrounded by a large number of valence electrons c.sodium gives an electron to chlorine to form a stable bond d.there are less than 16
  52. Science

    1. Consider a neutral atom that has 17 electrons A.) how many protons does it have b.) what is it's atomic number c.)which element is it 2. List the following for an atom with 33 protons and 42 neutrons a.) the name of the element b.) the atomic number
  53. chemistry

    I need help on a few of these. 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?
  54. Science

    compare the number of valence electrons an oxygen, O, atom has with the number of valence electrons a selenium, Se, atom has. are oxygen and selenium in the same period or group?
  55. physics

    At New York City, the earth's magnetic field has a vertical component of 5.2 10-5 T that points downward (perpendicular to the ground) and a horizontal component of 1.8 x 10^-5 T that points toward geographic north (parallel to the ground). What is the
  56. physics

    Find the distance between the two electrons. The value of the Coulomb constant is 8.98755 × 109 N · m2 /C 2 and the acceleration of gravity is 9.81 m/s 2 . 1. 0.507424 m 2. 50.7424 m 3. 5.07424 km 4. 5.07424 m 5. 5.07424 cm can anybody help me please
  57. College Algebra math

    A plane flies due east for 35 miles and then due south until it is 37 miles from its starting point. How far south did the plane fly?
  58. U.S History

    Which of these describes the location of the Gulf of Mexico? A. South of West Florida B. East of East Florida C. West of New Orleans D. South of Great Britain I think its A.
  59. Pre calc

    A boat is going 30 mph. It's direction is 100 degrees east of north. The water current is 15 mph and has a direction of 22 degrees east of north. Find the magnitude, and direction of boat.( with water current)
  60. Physics

    What is the difference in shape on a graph 70 degrees south of east and 70 degrees east of south?
  61. Chemistry 2

    What is the predominant intermolecular force responsible for the dissolution of the hydrophilic end of soap in water? Using dashed lines, illustrate where the intermolecular force occurs between atoms in adjacent molecules? Lone pair electrons have been
  62. physics

    The earth spins on its axis once a day and orbits the sun once a year (365 1/4 days). Determine the average angular velocity (in rad/s) of the earth as it (a) spins on its axis and (b) orbits the sun. In each case, take the positive direction for the
  63. Physics

    The earth spins on its axis once a day and orbits the sun once a year (365 1/2 days). Determine the average angular velocity (in rad/s) of the earth as it (a)spins on its axis and (b) orbits the sun. In each case, take the positive direction for the
  64. Physics

    Earth is a spherical body, of radius 6,376 km, which completes a full rotation about its axis in 24.0 h. how long (in hours) should the day on Earth be so that a person at the equator is able to float freely above the ground?
  65. Earth Science

    Computer models of Earth's climate project increases in the average temperature from 2°C to 6°C by the end of the century. Have these high temperatures ever occurred before in the past 400 000 years?
  66. 8th history

    A direct result of the three-fifths compromise was: the political power of the South was greatly increased since they were apportioned more representatives. *northerners paid more taxes than southerners. three-fifths of the population in the South was
  67. Science

    (just a quick science question, pls correct my answer if im wrong..) Which of the following statements is true A.) there is more water on earth now than there was millions of years ago **** B.) there is less water on earth now than there was millions of
  68. AP United States History

    Instructions: Use the following documents (most) and your knowledge of the period to answer the question. Question: Evaluate the following statement: "By the time of Abraham Lincoln's election in November of 1860, there was significant support in the North
  69. Geography

    My question is Why is Milan cooler than Palermo although Milan is in the North and Palermo is in the south of Italy Does rain fall got to do with it cause Milan has the most rain fall Milan:
  70. physics

    While flying due east at 130 km/h, an airplane is also carried northward at 41 km/h by the wind blowing due north. What is the plane's resultant velocity? (Draw vector diagram to solve problem.) Magnitude km/hDirection (north of east) 72° 18° 18° 72°
  71. History

    Can someone please check my answers and help me correct them if they are wrong? Thanks! <3 1. Which of the following describes changes to the industry in South Carolina during the 1800s? (1 point) an increase of pottery factories building factories to
  72. Math

    Two pilots take off from the same airport. Mason heads due south. Nancy heads 23º west of south. After 400 land miles, how far is Nancy from Mason’s route? Round your answer to the nearest tenth of a mile. (Enter only the number.)
  73. physics

    A jogger follows this route every morning. Assume each segment is a straight line. A= 1000m due south B= 500m at 53 degrees east of south C= 400m due east What is the jogger's displacement from start to end including magnitude and direction?
  74. Science

    What are 2 processess that change earth slowly? The ___1____, which includes the__2____ and part of the _____3_____, is divided into plates that carry all of the Earth's lands and oceans. These plates float on a ___4____ layer of rock in the upper mantle
  75. Reading

    Icebergs can be slippery slopes for ships at sea. An iceberg can be dangerous to ships because more than 3/4 of it is under the water. Most of it isnt visible. Icebergs are found in the cold seas near the North and South Poles. The wind and currents move
  76. math

    Find the weight of a 60 kg astronaut on earth?
  77. earth science

    what instument is used to find mass
  78. science

    does anybody know where i can find info. about the earth's crust?
  79. Physic

    A force of 10N act on a object making 30 degree angle north of east and another force of 20N act on it along north. Calculate resultant force and it's direction ?
  80. physics

    Two vehicles with the same mass collide and lock together traveling 28 m/s at 37 degrees north of east after the collision. How fast was the car traveling that was heading north while the other vehicle was traveling east?
  81. physics

    Two vehicles with the same mass collide and lock together traveling 28 m/s at 37 degrees north of east after the collision. How fast was the car traveling that was heading north while the other vehicle was traveling east?
  82. vectors

    The summit of a mountain, 2075 m above base camp, is measured on a map to be 4585 m horizontally from the camp in a direction 32.4° west of north. Choose the x axis east, y axis north, and z axis up. What are x, y, and z?
  83. physics

    The summit of a mountain, 2550 above base camp, is measured on a map to be 4880 horizontally from the camp in a direction 35.4 west of north. Choose the axis east, axis north, and axis up.
  84. socials 9

    So far as we know, the Vikings stopped visiting North America in the eleventh century. Imagine you belong to a small viking community which was left behind by the last ships. Write part of a Sega describing your experiences in North America. Give your saga
  85. Physics

    write out the equation please show the steps taken to solve the problem A small airplane flies at a velocity of 145 km/h toward the south as observed by a person on the ground. the airplane pilot measures an air velocity of 172 km/h south. What is the
  86. Chemistry

    Name an element that has 5 electrons in the third energy level. How do i determine the third energy level Row three on the periodic table is third energy level If memory serves me will, it begins with sodium. Ok. iS Krypton the electron configuration that
  87. Math

    1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where
  88. Math

    1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where
  89. Physics

    Aperson walks37.7◦ northofeast for 3.54km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?
  90. physics

    A car is driven east for a distance of 45 km, then north for 33 km, and then in a direction 32° east of north for 22 km. Determine the total displacement of the car from its starting point (counterclockwise from east).
  91. math

    A ferry boat operator is required to drive directly to the opposite side of the river (starting at south side of river is A and the north side of river is B where boat will end up) but does not know where to point the nose of the boat. The river is flowing
  92. Physics

    Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and
  93. Earth Science Regents!!!

    Two students in different parts of New York State measure the altitude of Polaris is above the horizon. The student near New York City finds the angle to be 41 degrees. The student near Massena finds the angle to be 45 degrees. Which state is best
  94. Geography

    51. How do the monsoons and the moutains influence the climate in South Asia? Include an analysis of how monsoons can be responsible for survival and hardship in this region. My full answer: The monsoons affect the South Asian climate greatly. In winter
  95. physics 213

    A duck has a mass of 2.80 kg. As the duck paddles, a force of 0.120 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.190 N in a direction of 48.0 ° south of east. When these forces begin to act, the velocity
  96. Ms.Sue August or Anonymous

    All 3 of you I see usually answer a lot of questions. Can you help me with some of these? 1. Erosion is a slow process that causes change to Earth's surface. All of the following are sources of erosion except A.wind B.earthquakes C.glaciers D.ocean waves
  97. scocial studies

    1. Why is it incorrect to say that the Ozarks are mountains? A.They are too small to be mountains. They are hills B.They are generally covered with trees. They are forests. C.They are flat on the top with valleys eroded away. They are plateaus D.They are
  98. chemistry

    Are Si valence electrons shared? Are C valence electrons shared? please help
  99. chemistry

    which element would have 2 electrons and +1 charge which element would have 18 electrons and +3 charge.
  100. Physics HELP!

    An airplane flies due north at 240 km/h with respect to the air. There is a wind blowing at 75 km/h to the northeast with respect to the ground. What are the plane's speed and direction with respect to the ground? __?__km/h __?__° east of north