1. Earth's Dynamic Atmosphere

    Earth's weather and climate are directly associated with the amount and angle of incoming solar radiation. In particular, the angle of incoming solar radiation is constantly changing due to Earth's wobbling, or tilting, on its axis. This is called Earth's

    asked by Prisila on December 26, 2017
  2. force of gravity

    A satellite orbits around the earth. The mass of the satellite is 1170 kg, and its altitude is 220 km. The mass of the earth is 5.98×1024 kg. The radius of the earth is 6.38×106 m. 1)What is the gravitational force on the satellite? 2)What is the orbital

    asked by ami on December 9, 2009
  3. Algebra 1

    Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate the surface area of earth using the formula for the surface area is a sphere, S = 4 pi r squared. Earths surface is about 70 percent water. About how many square meters of earths surface

    asked by Lauren on February 20, 2015
  4. Elements

    how can someone find out which element is a more chemically active nonmetal from looking at the Periodic Table? What element is a black crystal that hs 4 electrons in its outermost energy level?

    asked by Twilight lover on February 5, 2009
  5. Chemistry

    "There are two ions per formula unit in this compound. The -1 anion has 8 more electrons than the cation." I need to find the Chemical formula/name. Any suggestions on how to start? This can have more than one correct answer.

    asked by Hanna on October 16, 2007
  6. physics

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 950 m, horizontal distance 19.9 km, and 23.5° south of west. The second aircraft is at altitude 1200 m, horizontal distance 17.4 km, and 22.0° south of west.

    asked by Anonymous on February 20, 2013
  7. Physics

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 22.5° south of west. The second aircraft is at altitude 1000 m, horizontal distance 18.0 km, and 18.0° south of west.

    asked by Heather on September 13, 2012
  8. PHYSICS help!!!!!!

    An air-traffic controller notices two aircraft on his radar screen. The first is at altitude 850 m, horizontal distance 19.6 km, and 27.0° south of west. The second aircraft is at altitude 1100 m, horizontal distance 17.4 km, and 18.0° south of west.

    asked by neeba on September 14, 2012
  9. physics 2014

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, and 23.0° south of west. The second aircraft is at altitude 1300 m, horizontal distance 17.8 km, and 18.0° south of west.

    asked by James on January 16, 2012
  10. science

    An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 850 m, horizontal distance 20.0 km, and 24.5° south of west. The second aircraft is at altitude 1100 m, horizontal distance 18.0 km, and 16.0° south of west.

    asked by mohannad on September 3, 2012
  11. Quick Physics Check

    2. Which of the following examples does not show projectile motion? A. a tennis ball bounces across the net B. a ball is thrown at a downward angle toward a target on the ground C. a feather drifts to the ground D. a horseshoe is pitched at a stake Is it

    asked by Anonymous on November 9, 2015
  12. Physics

    One of the holes on a golf course lies due east of the tee. A novice golfer flubs his tee shots so that the ball lands only 64 m directly northeast of the tee. He then slices the ball 30 degrees south of east so that the ball lands in a sand trap 127 m

    asked by Anonymous on October 30, 2006
  13. PHYSICS

    A person walks 11.2 ◦ north of east for 4.06 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? Answer in units of km

    asked by Anonymous on September 12, 2011
  14. chemistry

    We conduct an experiment by shining 500 nm light on potassium metal. This causes electrons to be emitted from the surface via the photoelectric effect. Now we change our source light to 450 nm at the same intensity level. Which of the following is the

    asked by bill on September 4, 2010
  15. Physic please check

    Consider two different hydrogen atoms. The electron in each atom is in an excited state. (a) Is it possible for the electrons to have different energies but the same orbital angular momentum L, according to the Bohr model? Justify. No.Electrons within the

    asked by Mary on December 14, 2007
  16. 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=

    asked by Sandhya on April 8, 2008
  17. Last 3 QUESTIONS !!:( please

    How did party leaders resolve the disputed election of Rutherford B. Hayes and southern demands for removal of troops in the South? by agreeing to home rule for the South and an investigation into the election practices in several states by disapproving

    asked by Anna on December 23, 2014
  18. Physics

    Two carts of identical mass (500 kg). One is traveling south and the other is traveling east. They collide (inelastic collision) and slide 3 meters, 30 degrees south of the east. The total friction force is 10,000N. Calculate the initial velocities of

    asked by Neil on October 17, 2012
  19. Physics

    A comet with a mass of 7.95 1011 kg strikes Earth at a speed of 22 km/s. (a) Find the kinetic energy of the comet in joules. ____ J (b) Compare the work that is done by Earth in stopping the comet to the 4.2 1015 J of energy that was released by the

    asked by Dar on February 19, 2010
  20. Math (Physics)

    A galaxy is moving away from Earth. The "blue" hydrogen line at 434 nm emitted from the galaxy is measured on Earth to be 458 nm . Part A How fast is the galaxy moving? Answer--> v=____ c Part B How far is it from Earth based on Hubble's law? Answer-->

    asked by Dom on April 27, 2017
  21. Algebra

    Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles

    asked by TAnya on March 20, 2010
  22. economics

    south africa had weak rand at the time of the departure.was this good or bad time for south africa to travel

    asked by neo on September 6, 2018
  23. maths

    A light air craft takes off flying die north then turns and flies 11 000 metres due west.The plane then has a bearing of 340 degrees from its starting point.For what distance did it fly due north?

    asked by Shane on March 6, 2013
  24. Science

    2. According to the continental drift theory, which of the following land regions should show the greatest similarities in fossil types? (1 point) A) east coast of South America and west coast of Africa B) east coast of South and west coast of South

    asked by Nicole M on February 4, 2014
  25. 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?

    asked by Chris on August 13, 2018
  26. social studies

    Despite temperatures of more than 5,000º F, Earth's inner core is solid because of _____________________. a layer of ice just above it. the fact that Earth rotates so quickly. a thickness of over 1,000 miles. great pressure from the layers around it.

    asked by Sammy, !!!Please Answer!! on December 4, 2012
  27. physics

    A 2,000-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 39.0° north of east and at a speed of 5.15 m/s. Find the speed of the 3,000-kg car before the

    asked by Anonymous on November 13, 2012
  28. us history

    can someone check my answers, 1. How was South Carolina constitution of 1868 different from previous state constitutions? -B Representation was based on population alone. 2. How did Republicans control of South Carolina affect the state? -C. The

    asked by help mom on March 2, 2016
  29. 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

    asked by teamjakeward on February 15, 2009
  30. 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

    asked by Chris on December 5, 2012
  31. history US

    Which best describes our foreign policy for the entire 19th century? a. American foreign policy frequently became entwined in the issues raised by conflicts between european powers. b. territorial acquistiions increased our overseas posessions. c. the us

    asked by sarah on January 20, 2009
  32. Science guys :)

    hey guys a got a few problems i need help with im really desperate for help they're due soon online :( 1.Suppose that a constant current of 89 mA flows in a conductor. Find the absolute value of the total charge that passes through the conductor in 3

    asked by Zach on August 31, 2005
  33. drbob222,math

    Am going correct with this one. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year? S-4000=1 S=1+4000 S=4001 of species we

    asked by Jasmine20 on December 12, 2006
  34. biochemistry

    Calculate the total number of electrons that are lost in 1.00 g samples of fructose and oleate. (Note: the number of electrons lost per carbon atom is equivalent to its increase in oxidation state.) No. e- lost in 1.00 g fructose = _______________ No. e-

    asked by jessica on November 26, 2017
  35. Science

    1. An atom that loses or gains electrons is called a(n)____. isotope proton neutron ion*** 2.Which subatomic particles are most involved in chemical bonding? protons electrons*** neutrons isotopes 3.The main types of chemical bonds are___. ionic, covalent,

    asked by Sam on September 7, 2017
  36. Chemistry

    I have to write the exact lewis electron dot structure for para xylene C8H10. I tried writing it out but it doesnt work out proerly. C is supposed to have 31 electrons and H is supposed to have 10 totaling 42. i was doing research and it says that it is

    asked by Sam on November 29, 2009
  37. Chemistry

    The space shuttle uses fuel cells( AFC's) to produce electricity . In these fuel cells,O2 reacts with water and electrons to produce OH- ioins travel to the other electrode where they react with H2 to release electrons and produce more water. Based on this

    asked by Devin Boutte on November 21, 2011
  38. physics (check my answers)

    When the nuclear fuel in the sun is gone, the sun will collapse to a a. black hole b. white dwarf c. supernova d. neutron star My answer: I think its a black hole. If the mass of the Earth were suddenly doubled while the radius was unchanged, your weight

    asked by Jacob on February 17, 2007
  39. physics

    The threshold wavelength for photoelectric emission in metal is 600 nm.Find the maximum kinetic energy of the electrons emitted when it is exposed to the wavelength 200 nm

    asked by Anonymous on March 13, 2016
  40. physics

    What is the net gravitational field due the sun and earth at the center of the moon? You are given that the mass of the sun in 1.99 x 10^30 and the mass of the earth is 5.97 x 10^24. The distance from the center of the sun to the center of the earth is

    asked by Brenda on February 4, 2015
  41. physics

    During an eclipse, the Sun, Earth, and Moon are arranged in a line as shown in the figure below. There are two types of eclipse: (a) a lunar eclipse, when Earth is between the Sun and the Moon, and (b) a solar eclipse, when the Moon is between the Sun and

    asked by sanjeev on November 2, 2011
  42. 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

    asked by chuchy on July 22, 2005
  43. 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

    asked by Allishia on November 1, 2011
  44. earth science

    According to scientists, what is our best option if an asteroid 10 km in diameter was detected and closing in on an impact with Earth? A. Blow it up in space before it enters our atmosphere B. Divert it so that it doesn't collide with Earth C. Blow it up

    asked by alz on December 7, 2018
  45. social studies

    1. How has democracy in South America affected the region? A. It has led to more stable economies. B. It has led to an increase in military takeovers.------------ C. It ended class struggle in South America. D. It eliminated corruption in the government.

    asked by con on November 23, 2018
  46. physics

    find the magnitude and direction of a combination of 48N east and 14N north.

    asked by tasha jones on November 4, 2010
  47. 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

    asked by Aiecha on May 19, 2016
  48. physics

    you could produce a sample containing 2,400,000 free neutrons, what would it be 2658 seconds later? A) 300,000 neutrons, 2,100,000 protons, and 2,100,000 electrons. MY ANSWER B) 300,000 neutrons and 2,100,000 protons C) 300,000 neutrons, 2,100,000 protons,

    asked by Anonymous on October 26, 2011
  49. trigonometry

    I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that is coterminal with the angle

    asked by Michael on April 13, 2015
  50. Social Studies! CHECK!

    1. which event proved to European leaders that the policy of appeasement was not working? a. Germany's attack on France b. Germany's military alliance with Italy c. the rise of Naziasm in Germany d. germanys attack on Poland*** 2. how did South Carolina

    asked by what on May 7, 2014
  51. 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

    asked by Mia on September 20, 2010
  52. physics

    Equivalent forces derivation problem. EXAMPLE: Derive the formula for F3 in terms of the experimentally measured quantities m1, m2, 1, and 2. [Answer: F3=m1gcos1+m2gcos2.] Make sure you understand how this formula was derived. QUESTION: If the mass of both

    asked by sarah on April 28, 2010
  53. Physics

    An elevator is lifted up by a thick steel cable. While the elevator is moving upwards with a decreasing velocity, a. the upward force on the elevator by the cable is greater than the downward force of the Earth b. the amount of upward force due to the

    asked by Kirk on February 8, 2013
  54. 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.

    asked by GOY on March 1, 2016
  55. math

    Find the weight of a 60 kg astronaut on earth?

    asked by Aviwe on July 6, 2015
  56. science

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

    asked by brianna on December 16, 2008
  57. Physics

    A car makes a trip due north for three-fourths of the time and due south one-fourth of the time. The average northward velocity has a magnitude of 25 m/s, and the average southward velocity has a magnitude of 32 m/s. Taking northward to be the positive

    asked by Dakkota on September 16, 2014
  58. physics

    An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?

    asked by Lelette on November 4, 2010
  59. physics

    An object is moving to the right at a speed of 4 m/s. Four forces(10N North, 10N South, 20N Left, 20N Right) are applied to the object at the same time. What will be the object's speed in m/s after the forces are applied?

    asked by Lelette on November 4, 2010
  60. Science Physics

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

    asked by Anonymous on December 28, 2009
  61. Physics

    a man walks 10km towards west and then 15 km towards south. Find the resultant vectors, magnitude and direction.

    asked by Faheem on September 11, 2011
  62. Psychology

    How could my wife and I find out whether the South Beach Diet works for us? Write the methods section for an experiment.

    asked by jenna on March 4, 2013
  63. Social studies check answers ***damon***

    1.B 1. where would you most likely find south americas largest cities? A. Mountains B. rain forests C. coastlines D.deserts

    asked by dalia on March 13, 2014
  64. PHYYYYYSICS 5

    Two trucks driven by Abby and Brian start at the same position and take off in different directions in an open field. Abby is traveling at a speed of 40 mph in a direction 30° south of west. Brian is traveling at a speed of 56 mph in a direction 75°

    asked by Carissa on September 18, 2014
  65. math

    new south wales has 1900 km of coastline.this is 10600 km less than western australia,but 100 km greater than victoria.south australia has about twice as much coastline as new south wales,but less than western australia.the northern territory has 6200 km

    asked by wan on October 20, 2012
  66. Calculus/Vectors

    An airplane heads due south with an air speed of 480km/h. Measurements made from the ground indicate that the plane's ground speed is 528km/h at 15 degrees east of south. Calculate the wind speed.

    asked by Anonymous on May 2, 2011
  67. Social Studies (please give me websites with info)

    7. Short Answer Select one reform movement from the Progressive Era. Describe the movement and its impact on South Carolina. Provide details and examples that support how this movement changed South Carolina.

    asked by SpitFireRedHead on April 12, 2016
  68. U.S History (PLEASE help!!!)

    Which statement correctly explains the reasons that the Compromise of 1820 and the Compromise of 1850 were unsuccessful at solving the nation's issues? a. Slave labor was such an important part of the American economy that most Northern states stopped

    asked by #1Student on May 30, 2014
  69. Science

    A car is driven east for a distance of 43 km, then north for 20 km, and then in a direction 27° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's

    asked by Amy on January 29, 2013
  70. social studies

    Multiple Choice 1. While Earth's orbit around the sun takes roughly 365 days, a single rotation of Earth takes about 8 hours. 24 hours. 1 month. 12 months. 2. During the summer solstice in the United States, the ______ _______ is tilted farthest toward the

    asked by Sammy=( plzz answer!! on December 3, 2012
  71. physics

    A plane is heading to a destination 1750 km due north at 175 km/h in a westward wind blowing 25 km/h. At what angle from north should the plane be oriented so that it reaches its destination?

    asked by Lisa on January 11, 2010
  72. math

    answer if event is impossible, unlikely,as likely as not , likely or certain 1. of the original 56 singers of the declartion of independence four of them represented north carolina if you slected one singer randomly how likely is it that he represented

    asked by cecrett on March 10, 2014
  73. physics

    A 1.3 kg mass accelerates at 8.2 m/s2 in a direction 23 degrees north of east. One of the two forces acting on the mass has a magnitude of 7.85 N and is directed north.Determine the magnitude of the second force. Im in need of serious help I only have one

    asked by Joe Rogers on September 29, 2012
  74. Physics-Mechaincs

    A 1.3 kg mass accelerates at 5.8 m/s2 in a direction 36◦ north of east. One of the two forces acting on the mass has a magnitude of 17.3 N and is directed north. Determine the magnitude of the second force. Answer in units of N.

    asked by Genevieve on September 20, 2010
  75. Physics -URGENT-

    A 2 kg mass accelerates at 5.7 m/s 2 in a direction 19◦ north of east. One of the two forces acting on the mass has a magnitude of 17.1 N and is directed north. Determine the magnitude of the second force. Answer in units of N

    asked by Jenna on October 13, 2013
  76. physics

    A car is driven east for a distance of 88 km, then north for 28 km, then in a direction 30 degrees east of north for 25 km. Determine the magnitude of the displacement (in kilometers) of the car from its starting point. thanks!

    asked by lisa on June 15, 2011
  77. physics

    A jet airliner moving initially at 300 mi/h due east enters a region where the wind is blowing at 100 mi/h in a direction 26.0° north of east. What is the new velocity of the aircraft relative to the ground? in m/h at degrees North of east.

    asked by Elisa on June 2, 2008
  78. geometry

    Jenny is building a rectangular garden around a tree in her yard. The southwest corner of the garden will be 2 feet south and 3 feet west of the tree. The northeast corner of the garden will be 1 foot north and 4 feet east of the tree. If jenny paves a

    asked by katy on September 14, 2015
  79. Calculus

    At noon of a certain day,ship A is 60 km due north of ship B. If A sails east at 12 km/hr and B sails north 9 km/hr,determine how rapidly the distance between them is changing 2 hrs later. Is it increasing or decreasing?

    asked by 123 on September 3, 2014
  80. science

    there are several smal ponds about a1/2 mile east of pellett road, just north of shoemaker road.explain how you can tell whether the streams to the north of each pond are flowing into ()southward) or out of (northward)the ponds.

    asked by Anonymous on October 17, 2008
  81. 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

    asked by Jose Luis on November 22, 2015
  82. Physics

    Actually, I have 3 questions to solve. I know the 1st one requires Coulomb's constant, but I just can't get the formula to work. Ditto for the formulas for the other 2 questions. 1) A 6.3 μC point charge and a −1.7 μC point charge are separated by a

    asked by Jane on July 11, 2014
  83. Physics

    a) What will an object weigh on the Moon's surface if it weighs 500 N on Earth's surface? (b) How many Earth radii must this same object be from the center of Earth if it is to weigh the same as it does on the Moon? Alright, I know how to do part a. but

    asked by Abby on November 27, 2011
  84. physics

    We release an object of mass M at zero speed at a distance of 2*10^6 Km from the center of the earth. What is the speed at which the object hits the earth? G=6.67*10^-11; g= 9.8 m/s; M=5.97*10^24; r=6.3781*10^6 Suppose the mass of the object is M= 500 kg.

    asked by Alice on December 27, 2013
  85. chemistry - DrBob?

    Hi! Can you tell me if I chose the right options for my chemistry homework? My answers are at the bottom. 1. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent

    asked by Tiffany on November 2, 2014
  86. Chemistry

    Hi! Can you tell me if I chose the right options for my chemistry homework? My answers are at the bottom. 1. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent

    asked by Tiffany on November 2, 2014
  87. science

    Scientists believe that Earth's early atmosphere changed in composition as a result of a. the appearance of oxygen-producing organisms b. the drifting of the continents c. the changes in Earth's magnetic field d. a transfer of gases from the Sun

    asked by Angie on April 7, 2009
  88. physics

    What is the radius of a communications satellite’s orbital path that is in a uniform circular orbit around Earth and has a period of exactly 24.0 hours (86,400 seconds). (Measurement is from the center of Earth.) G = 6.67 × 10-11 N.m2/kg2 ME = 5.98 ×

    asked by Marco on May 30, 2012
  89. Physics

    I have no idea how to do this problem At what distance from the Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces? there\'s no data in the question

    asked by Physics on September 13, 2009
  90. Science

    While picking up passengers in a big city, a taxi driver drives 20.0 blocks south, then 15.0 blocks east, and then 6.0 more blocks south. What is the magnitude of the taxi’s resultant displacement? Iv'e been using the equation sqrt(x^2+y^2+z^2) THe

    asked by Kate on July 28, 2014
  91. Physics

    An ant crawls on a tabletop. It moves 2cm East, turns 3cm 40(degrees) North of East and finally moves 2.5cm North. What is the ants total displacement?

    asked by Helpme on June 19, 2012
  92. Relative velocity

    A pet-store supply truck moves at 25.0 m/ north along a highway. Inside, a dog moves at 1.75 m/s at an angle of 35.0 degrees east of north. What is the velocity of the dog relative to the road?

    asked by Sofia on January 10, 2011
  93. 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

    asked by Mel on September 12, 2008
  94. pre-calc

    a ship leaves port and sails for 2 hours north east and than 3 hours north west. If the speed remains constant, what course should the ship take home?

    asked by Bobert on May 15, 2012
  95. physics

    A 2.40 kg mess kit sliding on a frictionless surface explodes into two 1.20 kg parts: 3.78 m/s, due north, and 5.28 m/s, 32.8° north of east. What is the original speed of the mess kit?

    asked by Shane on March 11, 2015
  96. calculus

    Compare the standard wall socket voltage signals of Europe and North America. Recall that in North America, the voltage is described by the function V(t)=170sin120 pi x

    asked by jim on February 22, 2012
  97. Physics

    Help with this please. No idea. Except for a 22.00 min. rest stop, Emily drives with a constant velocity of 89.5 km/hr north. How long does the trip take if Emily's average velocity is 77.8 km/hr north?

    asked by Rebecca on August 13, 2017
  98. 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

    asked by ricky on March 26, 2018
  99. chm

    1. What does the term electronegativity mean? Answer the tendency for an atom to pull electron density toward itself the number of positive charges in the nucleus minus the number of electrons around it an atom's ability to form bonds with oxygen atoms my

    asked by luck on February 19, 2013
  100. chemistry

    Check? Answers On bottom. Electrostatic interaction is important for which type of bond? A. ionic bond B. triple covalent bond C. single covalent bond D. double covalent bond When an atom gains or loses valence electrons and becomes charged, it is known as

    asked by Victoria on December 13, 2012