1. trig

    A hiker walks 900m east and 500m south .Find the bearing of the finishing position from the staring point?

    asked by x on May 25, 2013
  2. physics

    An Earth satellite moves in a circular orbit 824 km above Earth's surface with a period of 101.2 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?

    asked by Pat Rick on September 3, 2011
  3. Physics

    Calculate the force on an electron (qe = -1.6 x 10^-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10^-6 m from a proton c.) in Earth's gravitational field at the

    asked by Bill on May 31, 2012
  4. Geology

    The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

    asked by Pete on December 17, 2014
  5. Earth's Heat Resources

    list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

    asked by Sydney on December 8, 2010
  6. physics

    A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.

    asked by D on October 4, 2012
  7. Physics

    Calculate the force on an electron (qe = -1.6 x 10-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10-6 m from a proton c.) in Earth's gravitational field at the surface

    asked by Bill on May 31, 2012
  8. Geography.../what does this mean?

    " The earth's physical landscape is the result of conflict between forces..." Explain what this means. Thanks. Is it possible that forces move Earth around, sometimes the movement is opposing another landforce, they collide, and one slide under?

    asked by Liza on April 4, 2007
  9. math

    On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second?

    asked by kay on August 21, 2017
  10. overland high school

    the gravitional force exerted on objects on the moon is about 1/6 that of earth. if an object weighs 240 newtons on the moon, on earth it would weigh _________.show work

    asked by danial on March 3, 2011
  11. Earth's Heat Resources

    list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

    asked by Sydney on December 8, 2010
  12. modern physics

    The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

    asked by gourav on March 21, 2017
  13. modern physics

    The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

    asked by gourav on March 19, 2017
  14. Physics

    The Earth is about 81 times more massive than the moon. During the gravitational interation of the Earth and the Moon, the magnitude of the gravitational force acting on the Earth _______ the gravitational force acting on the Moon. A) is greater than B) is

    asked by Anonymous on September 19, 2016
  15. Physics

    According to Anna, on Earth, Bob is on a spaceship moving at 0.8c towards Earth, and Carl, a little farther out, is on a spaceship moving a 0.9c towards Earth. According to Bob, how fast is Carl moving relative to Earth? (a) According to Bob, how fast and

    asked by Katie on February 4, 2013
  16. 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:

    asked by QER on May 15, 2007
  17. 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

    asked by nobody on January 25, 2017
  18. 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

    asked by bri;) on May 3, 2017
  19. Optimization--PLEASE HELP!!!

    At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east. a. Write a function for the distance between the two ships. b. At what time are the two ships closest?

    asked by Maria on November 22, 2011
  20. Calculuss--Optimization

    At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east. a. Write a function for the distance between the two ships. b. At what time are the two ships closest?

    asked by Maria on November 22, 2011
  21. Physics

    Find the gravitational force between the sun and the earth in newtons?

    asked by Charles on February 11, 2008
  22. maths help!

    find the mass of the earth assuming the radius is 6400km

    asked by newton on April 3, 2016
  23. algebra 2

    You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.1. the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from

    asked by linda on November 12, 2009
  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

    asked by annny on February 17, 2013
  25. Physics-Totally lost

    I'm totally lost on this one- the earth is surrounded by an electric field with a strenth of 100 N/C at the surface. Its electric properties are the same as a point charge located at its center. How would the gravatational force and electrical force

    asked by Rafaela on April 7, 2011
  26. 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?

    asked by Ryan on September 9, 2013
  27. 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.)

    asked by TeeKay on October 15, 2014
  28. Physics

    7. An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that people would be thrown into space. Show the error in this logic by calculating the centripetal force needed to hold a 100. kg

    asked by Brian on February 3, 2015
  29. Third Side, Reply to Jen

    Hi Jen, I've seen the drawing. My site is down at the moment. Draw a line from Venus (either of the two positions) to the line Earth-Sun at right angles. Let's call the distance Earth Venus d. Then you have a right angle triangle with a hypotenuse d, the

    asked by Count Iblis on November 11, 2006
  30. math

    Two lookout stations, which are 25 miles apart along the coast on a north-south line, spot an approaching yacht. One lookout station measures the direction to the yacht at N 33degrees E, and the other station measures the direction of the yacht at S

    asked by kai on December 11, 2012
  31. 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?

    asked by Mimi on August 26, 2008
  32. 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

    asked by lilman on May 25, 2012
  33. 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

    asked by y912f on February 5, 2009
  34. 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

    asked by Archie on January 26, 2015
  35. History

    Can someone please check my answers and help me correct them if they are wrong? Thanks!

    asked by Melissa on January 28, 2014
  36. introduction to law

    We have heard that south Africa has two kind of sources of law.what are those two sources of south African law?

    asked by yvonne on May 22, 2016
  37. physics

    A plane flies at 350 km at 28 degrees south of east. How far has the plane flown east and how far south ?

    asked by los on October 25, 2013
  38. physics force

    A positively charged rod is held near, but not touching, a neutral metal sphere. does the sphere experience a net force? if so, what direction/ I think the sphere has a net force to the left because since the sphere is neutral, it will have same number of

    asked by Anonymous on August 17, 2009
  39. SCIENCE HELP PLS

    The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of

    asked by Oscar on January 15, 2016
  40. 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

    asked by Alex on January 5, 2012
  41. Atmospheric Science

    Estimate the rate of freshwater mass production (kg s-1) by the melting of the North American ice sheet, assuming that its melting took 500 years. How does this compare with the rate of deep-water formation in the North Atlantic, which is estimated to be

    asked by john on November 22, 2009
  42. calculus

    Write the standard form of the equation for the path of a communications satellite in a circular orbit 22,000 miles above Earth. (Assume that the radius of Earth is 4000 miles.)

    asked by Anh on February 2, 2011
  43. geology

    When astronauts brought back rock samples from the Moon, the minerals present were mostly the same as those found on Earth. Can you think of reasons why this might be so? Would you expect minerals on Mars or Venus to be the same, or at least very similar,

    asked by nikki on May 26, 2011
  44. Physics

    A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

    asked by Alex on October 2, 2010
  45. Physics

    The international space center is 1500km above the earth surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6.0*10^-24kg and the radius is 6.4*10^6 m.

    asked by Bill on May 27, 2018
  46. Science

    On the main sequence, what type will have life spans of about ten billion years? I took Earth Science last year so although I do not have them in front of me, I believe the are in the Earth Science Reference Tables (ESRT).

    asked by Liz on January 2, 2007
  47. Physics

    An asteroid with mass m = 1.85*10^9 kg comes from deep space, effectively from infinity, and falls toward Earth. How much work would have to be done on the asteroid by friction to slow it to 550 m/s by the time it reached a distance of 1.50*10^8 m from

    asked by Kaitlyn on October 16, 2012
  48. earth

    a satellite orbits the earth in circular orbit 620 km above the suface. if the radius of the earth is 6380 km, calculate, to 3 significanf figures, the distance travelled in a single orbit?

    asked by mike on October 20, 2011
  49. AP Physics (circular motion)

    The moon revolves about the Earth in a trajectory that is very nearly a circle of radius r = 384,401 km, and requires 27.3 days (23.4 x 10^5 seconds) to make a complete revolution. What is the acceleration of the moon toward the Earth?

    asked by perry on September 24, 2009
  50. Physics

    the acceleration due to gravity on the moon is 1/6 that on earth. For a projectile with an initial velocity of 15m/s upward what would be the maximum height and total time of flight on the moon and on the earth?

    asked by Angie on September 19, 2014
  51. College Physics

    A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

    asked by Nicole on September 28, 2010
  52. science

    the phenomena of parallelism of axis? a- results in the production of day and night b- causes different hemispheres of the earth to tilt toward the sun c- determines the angle at which the sun's rays will strike the earth d- all of the above

    asked by latasha on March 2, 2011
  53. Physics

    At what height above the earth's surface. the acceleration due to gravity will be 1/9th of its value at the earth's surface. Re = 6400km

    asked by Invincible on April 2, 2017
  54. physics

    A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?

    asked by alex on December 19, 2011
  55. Physics

    How would the speed of Earth’s orbit around the sun change if Earth’s distance from the sun increased by 4 times?

    asked by Faith on January 13, 2011
  56. PHYSICS

    An object weighs 480 N on earth. What would its weight be on a planet whose mass is twice the mass and ratio of the earth?

    asked by NotYourTyn on September 13, 2015
  57. Science

    The waves that are used have to go deep into the earth. Can Love and Raleigh waves be used for the purpose of mapping the interior of earth? Why or why not?

    asked by Jennifer on April 10, 2008
  58. Physics

    If a 1-kg mass fell toward Earth from a large distance where it had zero relative velocity, what would be the velocity at the Earth's surface?

    asked by Jennifer on November 3, 2010
  59. science

    Somewhere between Earth and the Moon, gravity from these two bodies on a space pod would canel. Is it closer to the Earth or the Moon? why?

    asked by Randy on November 8, 2008
  60. Physics

    how many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface? I know that the mass of earth is 5.97 x 10^24 kg do i have to convert it to km ??

    asked by Sarah on June 15, 2009
  61. physics

    I will be thank full to u if u help me in solving the below problem If the change in the value of g at a height h above the surface of the earth is same as depth x below the surface of the earth, then (h

    asked by Ramesh Reddy on January 7, 2012
  62. science

    Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*

    asked by Anoymous on January 2, 2014
  63. phsics

    A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?

    asked by Anonymous on February 17, 2014
  64. Physics

    Explain how redioactive decay has always warmed the Earth from the inside and how nuclear fusion has always warmed the Earth from the outside.

    asked by Rob on April 26, 2008
  65. Physics

    A man has a mass of 65kg on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?

    asked by Anonymous on November 24, 2013
  66. physics

    A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight?

    asked by melissa on December 19, 2010
  67. science

    Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*

    asked by Stephanie on January 5, 2014
  68. Science physics

    what will be the acceleration due to gravity at up planet whose mass is 8 times the mass of the earth and whose radius is twice that of the earth? g=10

    asked by Ankit on December 12, 2016
  69. Phsyics

    Determine the magnitude and direction of the gravitational force exerted a) on the Moon by Earth and b) on Earth by Moon.

    asked by g on December 19, 2012
  70. physics

    Which of these three produces a greater tidal effect on you right now—the moon, the Earth, or the sunA) The sun.B) The Earth.C) The moon.

    asked by Christie on March 4, 2012
  71. physics

    At what altitude above the Earth's surface would your weight be two-thirds of what it is at the Earth's surface? (Assume Re = 6.371 103 km.)

    asked by melad on February 17, 2011
  72. earth

    The weight of a large animal is 120 kg on earth , what is the weight on the moon with one-sixth the gravity of the earth ?

    asked by john on October 20, 2010
  73. social studies

    please give me the pictures of grasslands and forest of different parts of world provided with the description about them ? For grasslands, start with http://www.blueplanetbiomes.org/grasslands.htm From there, click to web sites for the North American

    asked by Karan on June 15, 2007
  74. geometry

    PLEASE HELP WITH A FEW QUESTIONS triangle ABC has side lengths 8, 15, and 17 do the side lengths form a pythagorean triple? the length of the hypotenuse of a 30-60-90 triangle is 7 find perimeter to approach the runway, a pilot of a small plane must begin

    asked by brittany on May 24, 2012
  75. 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

    asked by mysterychicken on October 21, 2009
  76. Science Question PLEASE ANSWER QUICK! :D

    27. What is the function of the astmosphere's ozone layer? A. shields Earth from harmful solar radiation B. provides the oxygen needed by human life C. protects Earth from sun's heat*** D. removes pollution from the atmosphere *** = What I think is the

    asked by random idiot on January 11, 2018
  77. 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

    asked by Ji on September 14, 2010
  78. Math

    Carlos and Krystal are taking a road trip from Greenville to North Valley.Each has their own map,and the scales on their maps are different. A. On Carlos's map,Greenville and North Valley are 4.5 inches apart. The scale on his map is 1 inch = 20 miles. How

    asked by Jason on April 20, 2016
  79. 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.

    asked by Anonymous on May 5, 2011
  80. 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?

    asked by Millie on October 10, 2011
  81. 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

    asked by Bryan on November 12, 2006
  82. Math

    Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel

    asked by Danielle on February 18, 2014
  83. physics

    An Australian emu is running due south in a straight line at a speed of 16.9 m/s and slows down to a speed of 13.9 m/s in 3.5 s. Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed? (Assume

    asked by victoria c on September 14, 2013
  84. 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

    asked by Anna on October 25, 2012
  85. Physics

    the weight of the body on the surface of earth is 392N what will be the weight of this body in another body whose mass is double of earth mass and radius is fourth multiple of earth radius?

    asked by Priyank on September 16, 2015
  86. Science/Math

    A sailboat heads north at 3 m/s for 1 hour and then tracks back to the southeast (at 45 degrees to north) at 2 m/s for 45 minutes. a. How far has the boat sailed? b. How far is it from its starting location? The textbook that included the word problem is:

    asked by Walter on September 30, 2013
  87. 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

    asked by Erin on February 3, 2012
  88. 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 ?

    asked by Adil on October 24, 2017
  89. 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?

    asked by Josh on November 22, 2009
  90. 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?

    asked by ronnie on November 23, 2009
  91. Calculus

    Ship A is moving east at 20 miles per hour, while ship B is moving north at 15 miles per hour. At noon ship A was 5 miles east of an island, and ship B was 75 miles south of the island. At what rate is the distance of the ships changing at 1 pm?

    asked by Allie on October 23, 2016
  92. AP US History

    The South Carolina Crisis of 1832-1833 resulted in a. a clear victory for the federal government or d. unanimous support in South Carolina for nullification The following, except one, were important manifestations of anti-foreignism in the 1850's: a. the

    asked by Kylie on November 14, 2010
  93. math

    What's the minimum. length of the arc on the cicumference of the earth,where a curvature of the horizon is appearent? OR---What's the max.length of cord,drawn on the cicumference of the earth,where length of the cord appears same as arc? Follow up 2nd

    asked by mike on February 6, 2011
  94. Physics

    I have to find the eccentricity of an elliptical orbit with one focus, earth's center, E. I know the formula to find eccentricity is sqrt(1-)(b^2/a^2), but I don't know where to use the radius or if I need it. Do I just need to use the eccentricity formula

    asked by Thomas on April 22, 2008
  95. Astronomy

    A roughly spherical asteroid with a diameter of 1 km, and a mean density of 4 g/cm^3, hits the Earth with a relative speed 1.5 times the orbital velocity of the Earth. Compute the amount of energy released upon the impact. Compare that with the energy

    asked by qwerty on April 25, 2014
  96. Algebra 2

    A car enters a interstate highway 15 mi north of the city. The car travels due north at an avrage speed of 62.5 mph. Write an equation to model the car's distance from the city after traveling for h hours.

    asked by Carrie on April 10, 2010
  97. 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

    asked by bill on March 8, 2010
  98. 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

    asked by jay on March 8, 2010
  99. physics

    A 910 kg sports car slows down to 6.0 m/s to read a cross street sign. The 1440 kg pick-up truck following the sports car fails to see that the sports car has slowed and continues traveling at 17.0 m/s. The pick-up slams into the sports car. With what

    asked by help on November 30, 2010
  100. Physical science

    If 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

    asked by Anonymous on October 25, 2011