1. earth

    Two rockets are orbiting the earth, traveling in perfect circles with equal radii. The velocity of rocket A is twice that of rocket B. What can be said about their respective centripetal accelerations?
  2. Physics

    On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 W/m2. What is the electromagnetic energy contained in 6.4 m3 of space just above the earth's surface?
  3. math

    Describe the points on the earth’s surface that are visible to a viewer who is 100 miles above the North Pole. Would it be half of the surface area of Earth?
  4. Physics I

    Using 6400 km as the radius on Earth, calculate how high above Earth's surface you would have to be in order to weigh 1/16th of your current weight. Show all work leading to your answer OR describe your solution using 3-4 complete sentences.
  5. Science

    Why are the days typically hotter in June than in December here in the US? A.Beacuse the sun gives off more light and heat in the summer B.Because the Earth is closer to the sun in the summer and farther from the sun in the winter C.because the Earth's
  6. 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?
  7. Phsyics

    Determine the magnitude and direction of the gravitational force exerted a) on the Moon by Earth and b) on Earth by Moon.
  8. 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*
  9. 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?
  10. 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?
  11. 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?
  12. 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*
  13. 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
  14. 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.)
  15. 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?
  16. 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<<R)
  17. 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.
  18. 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?
  19. 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 ??
  20. 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?
  21. 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.
  22. 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?
  23. earth

    if n the diameter of the earth is 19.7Mm , what is in cm
  24. science

    how long is earths orbit and its roatation?
  25. physics

    how the moons stay in orbit around jupiter ?
  26. Physical Science

    How does gravity help keep satellites in orbit?
  27. science

    Explain why there is only one planet in each orbit around the sun?
  28. science

    comets orbit the sun in a what pattern
  29. science

    How do the moons stay in orbit around Jupiter?
  30. Chemistry

    What is the difference between and orbit and an electron orbital?
  31. astronomy

    If the planet is in an edge-on orbit, what would its mass be (in kg)?
  32. Food

    How did the Wrigley company come up with the name of orbit gum??
  33. Science

    1. Which type of weather technology often carries cameras that can make images of Earth's surface, clouds, and snow cover? A. weather balloon B. weather satellite**** C. computer D. automated weather station 2. Why are weather forecasts more reliable now
  34. Physics

    A small compass is held horizontally, the center of its needle a distance of 0.460 m directly north of a long wire that is perpendicular to the earth's surface. When there is no current in the wire, the compass needle points due north, which is the
  35. Physics

    I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than
  36. space

    Stars near the ______ should show the greatest Doppler shifts due to the earth's revolution. Why? Would it be stars near the ecliptic because it deals with the earth revolving and having motion.
  37. Physics

    I have really been struggling with this one and have come up with a wide variety of answers. Any help would be great: If the radius of a planet is larger than that of Earth by a factor of 8.25, how much bigger is the surface area of the planet than
  38. Physical Science

    the planet Jupiter is more than 300 as massive as earth. But a body would scarecly weighs 3 times as much on the surface of Jupiteras it would on the surface of the earth. Can you think of an explanation for why this is so?
  39. Physics

    The average distance separating earth and moon is 384000 km. What is the net gravitational force exerted by earth and moon on a 3.00 * 10^4 kg spaceship located halfway between them.
  40. Physics

    The height of the sun from point A is larger than from point B by 4.92 degree.If the distance between A and B is 500 Km, How long is the circumference of the earth? ( assume that earth is perfect sphere)
  41. earth

    how long would it take a radio wave with a frequency of 4.3 X10 to the 5th power Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00 x 10 to the 7th power km?
  42. chem

    The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?
  43. Physics

    You have a 120g yoyo that you are swinging at 0.9m/s. How much energy does it have? How high can it get above the lowest point of the swing without your doing any additional work, or Earth? How high could it get on the Moon, where gravity is 1/6 Earth's?
  44. geometry

    The radius of the earth is approximately 6371 km.If the international space station (ISS) is orbiting 353 km above the earth, find the distance from the ISS to the horizon(x)
  45. Physics

    The diameter of the Moon is 3.78x10^6m. It subtends an angle of .00982 radians at the surface of Earth. How far is the Moon from Earth? (Please explain I can't wrap my head around this question.)
  46. geography

    Case study 1 Country:Japan, Date:17th Jan 1995, Area:Kobe, Type of settlement:City, Tectonic plates involved: Pacific plate and Eurasian plate, Richter Scale magnitude:7.3, Duration of earthquake:20 seconds, Estimate death toll:6500. Case study 2
  47. Physics

    Suppose you wish to visit a star which is 450 light years away, and that you want your 21000 kg rocket to move so fast that you only age 20 years during the round trip. a. How fast must the rocket travel relative to the Earth? Give your answer as the
  48. science [planets/stars]

    Hey.. Well, first things first.. I'm given an assignment from my Earth Science class. Right now we're doing a unit about planets and Earth and sun. My teacher told us to write a [maximum] 2 page essay, which is also supposed to be descriptive. In the
  49. Physics questoin

    A satellite has an orbital radius of 3.74x10^7 m. If it has a period of 49776 seconds, what is the mass of the planet?
  50. physics

    A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
  51. Physics

    A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
  52. 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
  53. 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
  54. math 15

    find the minimum height above the surface of the earth so that the pilot at point a can see an object on the horizon at c 125 miles away. assume the diameter of the earth to be 8000 miles.
  55. math and science

    A space shuttle with a mass of 4,06 X 10kg,orbits earth at a height of 720km above the surface of the earth.calculate the gravitational force experienced by the shuttle
  56. 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?
  57. 6th earth science

    Can anyone help with this question If Earth's land features made by process of moving water are likely to be found on other celestial objects? I am trying to help my son but not sure I am understanding the question right myself.
  58. 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?
  59. 3rd grade - Solor System

    Two Questions: If it takes Jupiter 9.9 hours to make one rotation around the earth. This means that one day on Jupiter is actually how long? This is as many as how many Earth days?
  60. 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.
  61. 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
  62. Physics

    Why is more fuel required for spacecraft to travel from the earth to the moon than to return from the moon to the earth?
  63. Physics

    At what altitude above the Earth's surface would your weight be three-fourths of what it is at the Earth's surface? Assume re = 6.371 10^3 km.
  64. physics

    A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s^2. a)What is its speed when it is very far away from the earth?
  65. SCIENCE HELP PLEASE

    Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
  66. physics

    gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?
  67. Science HELP PLS

    how are earth and venus similar? how is venus different from earth? provide two similarities and two differences
  68. physics

    an object weighs 3 lb. at 10 earth radii from its center. What is the object's weight on the earth's surface?
  69. SCIENCE

    AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE
  70. physics

    Calculate the force of gravity on a 1 kg mass at Earth's surface. The mass of Earth is 6.0×10^24 kg , and its radius is 6.4×10^6 m.
  71. Algebra 1

    There is three times as much water as land on Earth's surface. What percent of earth is covered by water?
  72. earth

    if a person's mass is 50 kilograms approximately how much force is exerted on the person at earth surface
  73. science

    if i weigh 100 lbs on earth and i went to another planet whose gravity is 15 times that of the earth, how much would i weigh
  74. science

    the radius of planet x is twice that of the earth and its mass is also twice that of the earth. The gravitational acceleration on planet x would be approximatley?
  75. Physics

    Calculate the force of gravity on a 2 kg mass at Earth’s surface. The mass of Earth is 6 * 10 ^24 kg, and its raidus is 6.4 * 10 ^ 6.
  76. physics

    could you estimate the mass of the entire earth? How? If we cannot direct measure the earth's mass, how was it determined?
  77. PHYSICS

    does the sun exert a gravitational force on the earth? if so, why doesn't the earth fall into the sun?
  78. science

    As the moon revolves around the Earth, it also rotates on its axis. Why is it that the the same side of the moon is always visible from Earth?
  79. Science

    Suppose the moon rotated on its axis just as quickly as earth. Would you still see the same side of the moon from earth? Please help!
  80. Science

    occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth.
  81. Physics

    Suppose that the ratio of the Moon's mass to the Earth's mass is given by 1.200E-2 and that the ratio of the Moon's radius to the Earth's radius is given by 2.700E-1. Calculate the ratio of an astronaut's Moon-weight to Earth-weight. Now it seems like this
  82. physics

    Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If the instructors in spaceship
  83. physics

    Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If the instructors in spaceship
  84. science

    Why is the earth round? Why is the water blue? Why doesn't the water fall off the earth? the earth is not perfectly round, water is blue because particles reflect blue light. The water cycle, type that in and google it to find out for yourself. I'd give u
  85. Quantitative Reasoning (math)

    Your weight on the moon is relative to your weight on Earth. Neil Armstrong weighed 360 lbs. in his moon gear while on Earth, but on the moon he only weighed 60 lbs. What is the ratio of the Earth weight to the moon weight? How much would you weigh
  86. physics help 3!! **

    Based on the following data about planet X (which orbits around the Sun): Planet X's distance from Sun = 3.6*1012 m Planet X's radius = 2*106 m Planet X's mass = 8.2*1022 kg a.) Find gx, the size of the acceleration due to gravity on the surface of Planet
  87. 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
  88. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
  89. physics

    In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
  90. physics

    An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity? Select one of the options below as your answer: A. a force equal to its weight on Earth B. a force equal to zero
  91. i really need help and i dont ask alot so plzz

    I NEED HELP WITH THIS its a TEST: 1. Which of Earth’s spheres contains most of its mass? (1 point) atmosphere hydrosphere geosphere biosphere 2. Erosion and weathering are examples of which types of forces? (1 point) constructive forces destructive
  92. physics

    A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height,
  93. 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
  94. phys

    Find the acceleration due to gravity on a planet whose mass is four times the mass of Earth and whose radius is half the radius of Earth (g is the acceleration due to gravity on Earth).
  95. 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?
  96. 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
  97. 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,
  98. 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?
  99. physics

    A 910kg object is released from rest at an altitude of 1200 km above the north pole of the earth. If we ignore atmospheric friction, with what speed does the object strike the surface of the earth?
  100. 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.