1. Physics

    A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.
  2. math

    At a certain time of day, a pole, 5 meters tall, casts a 3 meter shadow. The shadow of the building beside the pole is 18 meters long. How tall is the building? How long will the shadow of a 45 meter building be?
  3. science

    A positive charge of 3.50 µC is located in an electric field of intensity 3.00 N/C directed toward the south. Find the magnitude and the direction of the force on the test charge. (remember E = Fon q' / q', and 1 µC = 1.00 x 10-6 C) a. 8.6 x 105 toward the south c. 1.2 x 106...
  4. Physics

    An antenna loosens and becomes detached from a satellite in circular orbit around the earth. Describe the antenna's subsequent motion. If it will land on earth, describe where: if not, describe hw it would be made to land on earth.
  5. Physics

    An antenna loosens and becomes detached from a satellite in circular orbit around the earth. Describe the antenna's subsequent motion. If it will land on earth, describe where: if not, describe hw it would be made to land on earth.
  6. physics numerical

    a satellite orbitting the earth at the equator at a na ltitude of 400 km, has an antenna that can be modelled as a 2.0m long rod. the antenna is oriented perpndicular to the earth's surface. at the equator, the earth's magnetic field is essentially horizontal and has a value ...
  7. Physics

    A comet is traveling towards the earth. The comet has a mass of 5.50E+12 kg and a radius of 323 m. The comet is traveling with a speed of 13.5 km/s and spinning with a period of 0.15 seconds when its center is a distance 2.28E+7 m away from the center of the earth. The comet ...
  8. math

    Find the distance btw two cities. Assume that the Earth is is a sphere of the radius 4000 miles and that the cities are the on the same longitude(one city is due north of the other).
  9. physics

    The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way as on earth, what ...
  10. Physics 102

    THIS IS A QUESTION IN MY PHYSICS BOOK & I REALLY REALLY NEED HELP. I AM 48YRS OF AGE JUST DECIDED TO GO BACK TO SCHOOL AND HONESTLY KNOW NOTHING ABOUT PHYSICS. Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s curvature “drops” ...
  11. physics

    The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way as on earth, what ...
  12. Earth's Dynamic Atmosphere

    Air pressure doesn't crush everything underneath it because A. air pressure is hypothetical and not a real force. B. air pressure is strong enough. C. things on earth have learned to withstand the constant pressure. D. air pressure is exerted in all directions. my answer is b.
  13. physics

    The hood ornament of Abe's car is shaped like a ring 0.06m in diameter. Abe is driving toward the west so that the earth's 5.0x10^-5 T field provides no flux through the hood ornament. What is the induced voltage in the metal ring as Abe turns from this street onto one where ...
  14. physics

    The hood ornament of Abe's car is shaped like a ring 0.06m in diameter. Abe is driving toward the west so that the earth's 5.0x10^-5 T field provides no flux through the hood ornament. What is the induced voltage in the metal ring as Abe turns from this street onto one where ...
  15. physics Bob Pursley plz help

    A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
  16. History

    Which accurately describes how the transmission of disease impacted the indigenous people of North and South America? European explorers transmitted the bubonic plague, decimating the native people of North and South America. European explorers transmitted meningitis, ...
  17. physics

    the earthis moving around the sun in a circular orbit of radius 1.5*10^11. it makes one revolution per year.find the angular speed of earth in radian/sec, and the tangential speed of earth using the formula v=r.w , and tangetial speed ?
  18. Physics

    A satellite orbits the Earth in an orbits 750 km high. Find (*) the satellite's orbital speed and (**) period. (The mass and radius of the Earth are 5.98E + 24 kg and 6370000 m, respectively.)
  19. Earth Science

    Scientists tell us that the Earth is suffering ill effects from ozone depletion and the greenhouse effect. Compare these two phenomenons. What aspects do they have in common? How might they actually help eah other to produce conditions in which humans and plants would find it ...
  20. physics please help

    An astronaut stands at a position on the Moon such that Earth is directly overhead and releases a Moon rock that was in her hand. (c) What is the gravitational force exerted by the Earth on the same 2.7-kg rock resting on the surface of the Moon? answer in mN I keep ...
  21. science

    Which statement best describes Newton’s Law of Universal Gravitation? A.Large objects, like Earth and the Sun, attract other objects everywhere in the universe. B.Gravity is a kind of magnetic force between objects and Earth. C.Gravity is the result of the curvature of space...
  22. Physics Urgent!!!!!

    Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such that Earth lies on a...
  23. College Physics

    During an electrical storm, clouds can build up very large amounts of charge, and this charge can induce charges on the earth's surface. Sketch the distribution of charges at the earth's surface in the vicinity of a cloud if the cloud is positively charged and the earth ...
  24. physics please help!!

    A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for locations A and B, ...
  25. Science

    WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?
  26. physical science

    The orbital velocity of an earth satellite in an orbit 400 mi above the earth?
  27. math

    If the sun is aplroximantely 1.5×10^(11) meters from Earth, what is the approximate distance from Earth to Mars.
  28. earth science

    " A condition of gravitational and bouyant equilibrim between earth's litosphere and asthenosphere" ... is what?
  29. Science

    How Does Earth's atmosphere make conditions on Earth suitable for living things?
  30. Physics

    A planet with density equal to Earth is 2R times far away from earth, if we double the distancs from 2R to 4R then "g" becomes:-
  31. Physics

    A satillite is orbiting the earth at a distance of 1.00X10^3 km above the surface of the earth. What is it's speed?
  32. physics

    At what altitude above Earth's surface would the gravitational acceleration be 1.20 m/s2? (Take the Earth's radius as 6370 km.)
  33. Earth science

    Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?
  34. earth

    If the angular velocity is increased by 17 times of the earth what will be the weight of an object at the equator?
  35. PHYSICS

    the radius of the planet Venus is nearly the same as that of the earth.if an object weighs We on the earth,what is valu
  36. physics

    what is a satellite's altitude above the surface of the earth if earth's mass is 5.98*10^24 kg and its radius is 6380 km?
  37. physics

    How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.
  38. physics

    How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.
  39. Science

    How does the earth's tilt affects how directly light reaches different parts of the earth?
  40. physics

    What is the acceleration due to gravity at a distance of one Earth radius above the Earth's surface
  41. physics

    What is the acceleration due to gravity at a distance of one Earth radius above the Earth's surface
  42. Physics

    If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the Sun would this planet be? The answer for this one is 1.6 earth radii, but I can't seems to get solution to find the answer. I would appreciate for any hint or help.
  43. physics

    the moon has a period of 27.3 days and a mean distance of 3.90x10^8 m from the center of the earth. find the period of a satellite in orbit 6.7x10^6 m from the center of earth. thank you!
  44. Physics

    A ship sets sail from Rotterdam, The Netherlands, heading due north at 5.00 m/s relative to the water. The local ocean current is 1.54 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?
  45. physics

    what is the value of the acceleration due to gravity of the earth at an altitude twice the radius of the earth?
  46. Earth Scince

    Can crude oil burn in the Earth if it comes in contact with magma?
  47. Science

    What would happen to ocean tides on Earth if Earth stopped rotating?
  48. Science

    The mass of astromout measured on earth in 8500g. What will be his weight on earth
  49. science

    if yourweight is 60N on earth,how far should you go from the center of the earth so that your weight will be 300N
  50. earth

    Why is the Earth's atmosphere rich in oxygen and poor in carbon dioxide?
  51. science

    Which statement most accurately compares Earth’s crust and Earth’s mantle?
  52. earth

    Compare the patterns of earthquakes, colcanoes and mountain ranges on Earth.
  53. earth

    please write an essay about earth and its environment. please mention a suitable site
  54. earth

    If Earth took 500 days to orbit the sun instead of 365, how would the seasons be different?
  55. earth science

    how does radioactive decay provide heat energy within the earth
  56. earth scince

    What process is mainly responsible for shaping Earth's land surface
  57. Earth Science

    Upon what measurement is the Earth's latitude and longitude system based?
  58. earth science

    describe five ways earth's oceans affect our life?
  59. chemestry

    the Earth has mass of approximately 5.98* 10^24kg and radius 6.38* 10^6m. what is the density of the Earth in (a)g/cm^3 and (b) kg/m^3 ?
  60. physics

    How high does a rocket have to go above Earth's surface until its weight is one fourth what it would be on Earth?
  61. earth comm/earth's fluid spheres

    how severe is thunder storms?
  62. Physics

    What is the ratio of the wight of a man when he is in a tunnel 1000 km below the surface of the Earth to his weight at the surface? ...I'm not sure how to proceed, not because I don't know how to do it, but because I have no idea how to come up with a(g) 1000 km inside the ...
  63. PHYSICSS!!!

    still cant get this one? so damon i know you wanna help! or anyone else im open for suggestions haha Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from ...
  64. math

    A  pole  is  8  feet  long.    Its  shadow  is  6  feet     long.    If  you  draw  a  line  from  the  tip  of  the   pole  to  the  tip  of  the  shadow,  how  long  will   the  line  be?
  65. Science

    Which sphere of the Earth system contains nearly all of Earth's mass? A. the geosphere B. the atmosphere C. the biosphere D. the hydrosphere
  66. earth

    Is the amount of solar energy intercepted by earth affected by the presence of clouds in the sky?
  67. Physics

    If you take a boat from earth and put it on a planet with twice earth's gravity, what would happen if you tried to float it in water?
  68. Earth's Heat Resources

    How is the energy that reaches earth's surface returned to space? is is by radiation?
  69. Earth's Heat Resources

    How is the energy that reaches earth's surface returned to space? is is by radiation?
  70. earth

    If the ray is traveling 5800 miles per hour from earth how long would it take to hit the moon?
  71. physics

    calculate the escape velocity of a satellite from the earth's gravitational field,if the radius of the earth is 6.4×10^6m
  72. earth

    If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren
  73. Advanced Functions

    The earth rotates on its axis once every 24 hours. How long does it take Earth to rotate through an angle of 4(pi)/3?
  74. physics

    If the change in the value of 'g ' at a height 'h ' above the surface of earth is the same as at a depth 'x ' below it. When both x and h are much smaller than the radius of the earth. The relation between x and h is?
  75. Physics

    Given that acceleration due to gravity at the surface of the earth is 9.8N/kg, estimate a value for the mass of the earth. G=6.7x10^-11
  76. Physics 3A

    Determine the magnitude of the effective value of at a latitude of 60 on the Earth. Assume the Earth is a rotating sphere.
  77. physics

    The Moon is about 3.8 X 105 km from the Earth. Show that its average orbital speed about Earth is 1026 m/s
  78. science

    suggest only one best method to avoid such a collision if an earth asteroid strikes earth surface?
  79. earth science

    A different side of the moon faces the earth at different times of the month. True or false?
  80. 9th Grade Biology

    Has plant life on earth evolved and have rose bushes always been around on earth?
  81. Chemistry

    What is the magnitude of the orbital velocity of the earth when the radius of the earth's orbit around the sun is 150000000?
  82. Science Earth

    Would earthquakes of similar magnitudes in different regions of the Earth cause approximately the same levels of damage?
  83. Earth science

    Which of the following is MOST similar between the inner and outer core of the Earth? a.)composition b.)pressure c.)movement d.)density
  84. Intergrated science

    I need help... I don't know where to begin to answer this question. We are working in force/work ok... This is the question: A pole vaulter weighing 175 lbs leaps 16 ft over a bar . How much work is done?
  85. physics

    At what altitude above the Earth's surface would your weight be three-fifths of what it is at the Earth's surface? Assume re = 6.371 10^3 km. If weight decreases as the inverse square of distance, then 3/5= (re/r)^2 where r is the distance from the center of earth to the spot ...
  86. PHYSICS HELP!

    IMAGINE- a building 6400km. high. On the ground floor, a person weighs 175lbs when he steps on a spring scale how much would the man weigh on the same scale if he were standing at the top floor? HINT: Note that 6400km is also the radius of the earth so that the top floor is ...
  87. physics

    Several forces act on a particle as shown in the figure below (where F1 = 75.0 N, F2 = 65.0 N, θ1 = 25.0° and θ2 = 74.0°, . If the particle is in translational equilibrium, what are the values of F3 (the magnitude of force 3) and θ3 (the angle that force 3 ...
  88. physics

    A small map shows New York to be 486 miles in a direction 8° north of east from Columbus. The same map shows that Buffalo is 302 miles in a direction 56° west of north from New York. Assume a flat Earth, and use the given information to find the displacement from Columbus to...
  89. astronomy

    Find an exact expression for the magnitude of the tidal force applied by Earth to our rock of mass m
  90. physics

    Find the force of gravity (in newtons) on a spacecraft 15100 km above the earth's surface, if its mass is 400 kg
  91. Math Application

    A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates d and h. (b) If d is to be 3500 miles, how high must the camera orbit above ...
  92. Earth Space

    Which branches of earth science would the hydrosphere interact with? I said biosphere, atmosphere, and geosphere. Is that correct?
  93. physics

    how much energy is required to move a 1000kg object from the Earth's surface to an altitude twice Earth's radius?
  94. Physics

    How much energy is required to move a 900 kg object from the Earth's surface to an altitude twice the Earth's radius?
  95. Physics

    How much energy is required to move a 900 kg object from the Earth's surface to an altitude twice the Earth's radius?
  96. earth

    Search Results for "How many years pass befor light from Alpha Centeuri reaches earth?"
  97. Earth Science

    Which of the following processes helps to shape the landforms of Earth? - Mass movement - Glaciers - Wind - All of the above
  98. earth science

    If the earth was made 4.5 billion years ago, how comes we don't have any craters or rocks from that time?
  99. grammar

    im confused if "earth" should be spelled with an uppercase. i would think so but just wanna make sure Hawaii has some of the most beautiful beaches on the earth. thanks :)
  100. Physics

    Earth's mean radius and mass are 6,371 km and 5.97 x 1024 kg, respectively. Show that the acceleration of gravity at the surface of Earth is 9.80 m/s2.
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