1. earth

    how far should a man go from the centre of the earth such that his weight is 1\4th of that on the earth?radius=6400km.
  2. LSU

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.53 x 104 m/s, and the radius of the orbit is 3.42 x 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite
  3. physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 104 m/s, and the radius of the orbit is 5.50 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
  4. physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.75 104 m/s, and the radius of the orbit is 5.15 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
  5. physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.80 104 m/s, and the radius of the orbit is 5.45 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
  6. physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.80 104 m/s, and the radius of the orbit is 5.20 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
  7. Physics

    A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.70 104 m/s, and the radius of the orbit is 5.30 106 m. A second satellite also has a circular orbit around this same planet. The orbit of this second satellite has
  8. Physics

    A synchronous satellite is placed in a circular orbit above Earth, at an altitude of 36 400 km. Find the centripetal acceleration of the satellite. Use significant digits and units
  9. Physics

    An artificial satellite circles the Earth in a circular orbit at a location where the acceleration due to gravity is 8.26 m/s2. Determine the orbital period of the satellite.
  10. science

    a satellite is in geosynchronous orbit 36,000 km above earth. describe how you would fond the speed of this satellite.\ http://en.wikipedia.org/wiki/Geosynchronous_orbit
  11. Physics

    (a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to five times the earth's radius of 6.38 106 m. (b) Find the satellite's orbital period. Please Help!
  12. physics

    (a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 106 m. (b) Find the satellite's orbital period.
  13. Physics

    (a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to six times the earth's radius of 6.38 x 10^6 m. (b) Find the satellite's orbital period.
  14. Physics-Gravitational Potential Energy

    A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude orbit. If the satellite has a mass of 1.16 ✕ 103 kg, what is the new altitude it reaches? Take the mass of the Earth to
  15. physics

    A satellite of mass m in a circular orbit at a height of 400Km above the earth's surface. What is the Radius of the Earth (given: 6.35 * 10^6) with respect to the center C of the Earth?
  16. Maths again

    For the transformation w=z^2, show that as z moves once round the circle centre O and radius 2, w moves twice round centre O radius 4. I am okay finding the radius and centre of the locus but how do I show it moves twice roundfor w for z turning once. See
  17. Physics

    A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? [Answer in Km] (b) What is the satellite's acceleration? [Answer in m/s^2] I see this posted over and over again
  18. maths

    T has points (2,1)(3,-2)(1,-1) E1 has a scale factor of 3 and its Centre of Enlargement is (0,0). E2 has a scale factor of 0.5 and its centre of enlargement is (0,0). I know how to do those, my question is how do you do E2E1 with a scale factor of 1.5 and
  19. maths

    T has points (2,1)(3,-2)(1,-1) E1 has a scale factor of 3 and its Centre of Enlargement is (0,0). E2 has a scale factor of 0.5 and its centre of enlargement is (0,0). I know how to do those, my question is how do you do E2E1 with a scale factor of 1.5 and
  20. trig

    A satellite is in geostationary orbit 22,500 miles above the earth. IF the radius of the earth is 3,960 miles, how fast is the satellite moving in miles per day? How fast is the satellite moving in miles per hour?
  21. Physics

    Four point masses are placed at the corner of a square of side 2m .find the centre of mass of the system w.r.t the centre of square?
  22. Math

    A chord 30cm long is 20cm from the centre of a circle calculate the length of a chord which is 24cm from the centre.
  23. MATHS

    The entrance fees to the Science centre is as follows: Adult :$ 10 Child :$7 A group package of 1 adult and 2 children can be bought at a discounted price of $21. One day, 234 adults and 456 children visited the Science Centre. What is the minimum amount
  24. Forces on Structures (Science)

    What force continually changes a satellite's direction? Why doesn't a satellite need fuel to keep moving? What would be the effect on satellites now in orbit if Earth were to stop rotating?
  25. Physics

    For launching a satellite into orbit around earth, would the proper conservation of energy formula be: Epi + Eki + O work = Epf + Ekf? Would work = 0 for launching a satellite? And, would Epi = -Gm1m2/radius of earth or would it just equal 0 (because we
  26. Physics

    What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 186 km? What is the period of revolution? winterWX, Friday, February 16, 2007 at 9:36pm So GMm/r^2 = mv^2/r and I know that I need to solve for v but what do I use
  27. Phycis

    Two kids of mass 10 kg and 15 kg are trying to balance a see saw of total length 6 metres with fulcrum at the centre if one of the kid is sitting aat on end the distance of other from the centre in metres is
  28. Physics

    A geostationary satellite orbits the Earth in such a manner that it is always directly above the same point on the equator as the Earth rotates. Assuming that this orbit is circular, what is its radius? (The mass of the Earth is approximately 5.97 × 1024
  29. physics

    1.A spherical bowl(R = 20 cm) contains water(n = 1.33) and your pet gold fish who, is swimming 15 cm from the centre of the bowl. You however are 35.0 cm from the edge of the bowl-outside, of course. Describe the image your fish sees. 2.The hydrogen atom
  30. Physics

    A 50 kg satellite circles the earth in an orbit with a period of 110 min. What minimum energy E is required to change the orbit to one with a period of 320 min? Assume both the initial and final orbits are circular. The Earth’s radius is 6.37 × 10^6 m,
  31. physics

    A 581 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. the orbital speed is 5590.98 m/s. Find the period of its revolution.
  32. Physics

    An 1750 kg weather satellite moves in a circular orbit with a gravitational potential energy of 1.69 x 10^10 J. At it's location, free-fall acceleration is only 6.44 m/s^2. How high above Earth's surface is the satellite?
  33. PHYSICS(HELP)

    A satellite with a mass of ms = 7.00 × 103 kg is in a planet's equatorial plane in a circular "synchronous" orbit. This means that an observer at the equator will see the satellite being stationary overhead (see figure below). The planet has mass mp =
  34. Physics

    Sputnik, the first artificial satellite to orbit the Earth, had a mass of 83.6kg and travelled at 7574 m/s. The radius of the earth is 6371 km and its mass is 5.972 x 10^24 kg. What gravitational force did Sputnik apply to the earth during this orbit? What
  35. mechanics of machines

    A vehicle travelling at 29m/s on a level road surface which curved to a radius of 50m about to overturn The centre of gravity at centre of the 1.5m track. a. At what height is the centre of gravity b. At what velocity could the vehicle negotiate the same
  36. physics

    at what height above the earth's surface in a circular orbit have to travel in order to have an orbital period half that of a geosynchronous satellite's period? (a geosynchronous satellite orbits above the equator so that it is above the same location on
  37. physics

    A rocket is launched vertically from Earth's surface with a velocity of 3.4 km/s. How high does it go: From Earth's centre? From Earth's surface? how can this be done without any time or force mentioned ??
  38. physics

    A spy satellite was launched into a circular orbit with a height of 599 km above the surface of the Earth. Determine its orbital speed and period. (The mass of the Earth is 5.97 1024 kg, and the radius of the Earth is 6370 km.)
  39. physics

    A coin is placed on a vinyl stereo record that is making 78 revolutions per minute on a turntable. Find the magnitude of the acceleration when the coin is placed 5.0, 10, and 17 cm from the center of the record. The radius of Earth is about 6.38x10^3 km. A
  40. physics

    A communications satellite is in a synchronous orbit that is 3.00 107 m directly above the equator. The satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.10 106 m.
  41. English - Native speakers

    Hello what is the difference between a supermarket and a market a chemist and a pharmacy a shopping centre and a department store a shopping centre and a shopping mall
  42. Physics

    A satellite is orbiting the earth just above its surface. The centripetal force making the satellite follow a circular trajectory is just its weight, so its centripetal acceleration is about 9.81 m/s2 (the acceleration due to gravity near the earth's
  43. 465465

    A satellite is orbiting the earth just above its surface. The centripetal force making the satellite follow a circular trajectory is just its weight, so its centripetal acceleration is about 9.81 m/s2 (the acceleration due to gravity near the earth's
  44. physics

    3. A satellite of mass 500 kg orbits the Earth with a period of 6000 s. The Earth has a mass of 5.98 x 1024 kg. (a) Calculate the magnitude of the Earth's gravitational force on the satellite. (b) Determine the altitude of the satellite above the Earth's
  45. Energy of satellite PHYSICS

    An m = 43 kg mass instrument package is put into orbit at an altitude above the Earth of A = 23000 km. What is the kinetic energy of this satellite in Joules?
  46. Physics

    An artificial satellite circles the Earth in a circular orbit at a location where the acceleration due to gravity is 8.26 m/s2. Determine the orbital period of the satellite. ____min Ive tried everything I can think of the value im getting through the
  47. physical science

    The orbital velocity of an earth satellite in an orbit 400 mi above the earth?
  48. Phy

    A non conducting sphere of radius r charged uniformly with surface charge density sigma rotates with angular velocity omega about the axis passing through its centre. Find the magnetic induction at the centre of sphere.
  49. Physics....Orbiting Satellite

    A orbiting satellite stays over a certain spot on the equator of (rotating) Venus. What is the altitude of the orbit (called a "synchronous orbit")? I found the radius and mass of Venus on the google, but I don't know what I should plug in the "T" if I use
  50. physics

    Find the speed of a satellite in a circular orbit around the earth with a radius 2.69 times the mean radius of the earth; Radius Earth= 6.37E+3km; Mass Earth= 5.98E+24kg.
  51. science help!

    A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). If the satellite has a mass of 1500 kg, what is the force of gravity acting on it?
  52. mathematics

    find the equatn of a circle with (a).centre (1,2) and radius 3.(b) centre (1,-3) and radius 2
  53. physics

    radius R of the orbit of a geosynchronous satellite that circles the earth. (Note that R is measured from the center of the earth, not the surface.) You may use the following constants: The universal gravitational constant G is
  54. physics

    One of the moons of Jupiter is Io. The distance between the centre of Jupiter and the centre of Io is 4.22 x 10^8 m. If the force of gravitational attraction between Io and Jupiter is 6.35 x 10^22 N, what must be the mass of Io?
  55. maths-circles

    a circle having a centre O has a triangle PQS inside it with the base QP is not on centre O. PT and QT are two tangents from an exterior point T (S, O and T are linear points - lie in one line ) it is given that angle ptq = 25 deg . find angle PSQ and OPQ
  56. physics

    Two satellites are orbiting the Earth in stable circular orbits. Satellite A has a mass m and is located at a distance 2r from the center of the Earth. Satellite B has a mass 2m and is located at a distance r from the center of the Earth. Which one of the
  57. phy

    A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. how high above earth? acceleration?
  58. Physics

    An earth satellite moves in a circular orbit with an orbital speed of 5800 m/s. Find the time (expressed in seconds) of one revolution of the satellite. Find the radial acceleration of the satellite in its orbit. I think we need to know the radius of the
  59. physics

    The physics of satellite motion around Jupiter. A satellite of mass 2.00 x 104 kg is placed in orbit 6.00 x 105 m above the surface of Jupiter. Please refer to the data table for planetary motion included in this lesson. a) Determine the force of
  60. gravity

    You are an astronaut in the space shuttle pursuing a satellite in need of repair. You are in a circular orbit of the same radius as the satellite (450 km above the Earth), but 24 km behind it. How long will it take to overtake the satellite if you reduce
  61. Phizzics....

    The Canadian microsatellite MOST (Microvariability and Oscillations of Stars) has a mass of just 52 kg. It travels in an almost circular orbit at an average altitude of 820 km above Earth’s surface. a) Calculate the gravitational force between Earth and
  62. Physics

    A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this
  63. math

    ) A chord AB of length 13cm is drawn in a circle centre O at a distance of 5cm from O. Find the radius of the circle. Stop at 1 d.p.(b) TA and TB are tangents to a circle centre O. TOC is a straight line and <ATB = 56°. Calculate <ACO.
  64. physics

    A 981-kg satellite orbits the Earth at a constant altitude of 103-km. How much energy must be added to the system to move the satellite into a circular orbit with altitude 199 km? I need answer in MJ please tell me what formula
  65. physics

    Scientists want to place a 3300 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 2.2 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars =
  66. math

    Two chords in a circle are equal in lengh.The distances from the centre of the circle can be represented by x2 and 4x respectively.How far is it chord from the centre of the circle?[Under the topic of properties of a circle.]
  67. maths

    The Weight of an object varies inversely as the square of its distance from the centre of the earth.the weight of a spacecraft is observed to be only a quater of its weight on earth.How far is the spacecraft from the surface of the earth? [take radius of
  68. physics

    What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 208 km above Earth's surface? (b) What is the period of revolution? I got a to be 7786 m/s^2 but im not sure how to get b.
  69. Math

    A satellite will be released into an orbit of more than 400 miles above the earth. the rocket is carrying it is currently 255 miles above earth write and solve an inequality to show how much higher the rocket must climb before it releases the satellite
  70. Physics

    A 4.70 nC point charge is placed at the centre of a hollow metal sphere that has an inner radius 4.70 cm and an outer radius 17.6 cm. The metal sphere itself is charged to 8.40 nC. a)What is the magnitude of the electric field at a distance of 1.60 cm from
  71. physics

    A communications satellite is in an orbit that is 3.1 multiplied by 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by
  72. Physics

    What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 186 km? What is the period of revolution? So GMm/r^2 = mv^2/r and I know that I need to solve for v but what do I use for the mass of the satellite? Do I just plug
  73. Physics

    The time period of a satellite in an orbit around the earth is 90 minutes. What is the kinetic energy, potential energy and the total mechanical energy of the satellite?
  74. Science - physics

    A circular wire of radius R carries a total charge Q distributed uniformly over its circumference. A small length of wire subtending angle teta at the centre is cut off. Find the electric field at the centre due to the remaining portion
  75. physics

    (a) What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 129 km above Earth's surface? (b) What is the period of revolution? All right, I swear I have done everything and cannot figure this out!
  76. Physics

    Two satellites, X and Y, orbit a planet in nearly circular orbits. Satellite X takes 20 days to complete one orbit, while satellite Y takes 160 days. If satellite X has orbital radius 1.0r, what is the orbital radius of satellite Y?
  77. physics

    An artificial Earth satellite, of mass 3.00 × 10^3 kg, has an elliptical orbit, with a mean altitude of 500 km. (a) What is its mean value of gravitational potential energy while in orbit? (b) What is its mean value of orbital kinetic energy? (c) What is
  78. advanced functions HELP!!!

    the function S(d)=93logd+65 relates the speed of the wind, S, in mile per hour, near the centre of a tornado to the distance that the tornado travels, d, in miles. a)Calculate the avg. rate of change for the speed of the wind at the centre of a tornado
  79. physics

    A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a
  80. physics

    A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a
  81. Mathematics

    Low Earth orbiting satellites orbit between 200 and 500 miles above Earth. In order to keep the satellites at a constant distance from Earth, they must maintain a speed of 17,000 miles per hour. Assume Earth's radius is 3960 miles. a. Find the angular
  82. Precalc HW (NO IDEA HOW TO SOLVE)

    Low Earth orbiting satellites orbit between 200 and 500 miles above Earth. In order to keep the satellites at a constant distance from Earth, they must maintain a speed of 17,000 miles per hour. Assume Earth's radius is 3960 miles. a. Find the angular
  83. math

    A chord,distance 2 cm from the centre,of a circle is 18 cm long.calculate the length of a chord of the same circle which is 6cm from the centre.
  84. Physics

    I have two I need help with! 1. An airplane is flying in a horizontal flight level at constant velocity, heading due east. If the weight of the plane is 2.6 x 10^4 N, what is the net force on the plane? a)-2.6x10^4 N b)2.6x10^4 N c)0.0 N d) that due to
  85. Statistics help please

    A survey of 23 customers at a shopping centre asked the distance(km) travelled to reach the shopping centre. The data was entered into Minitab to determine the descriptive statistics.a survey of 23 customers at a shopping centre asked the distance(km)
  86. Physics Meteorite

    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
  87. Math (trigonometry)

    A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal
  88. Astronomy

    A polar satellite, in a low Earth orbit passing over both poles, makes 16 orbits each day. Viewed from Earth, how far apart in longitude are its consecutive passes over the equator?
  89. physics

    The force of gravity at Earth's surface on an astronaut is 634N. What is the force of gravity on the same person at each of the following distances, in multiples of Earth's radius, from the centre of Earth? A)2 B)5 C)10 D)17.2
  90. physics

    A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this
  91. Physics

    A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this
  92. Physics

    A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this
  93. physics

    a 55 kg satellite is in circular orbit earth with an orbital radius of 7.4 x 10^6 m . determine the satellite’s a)kinetic energy b)gravitational potential energy c)total energy d)binding energy
  94. MATHS

    What is Radius if Angle at centre is 150 and Arc length is 220 What is radius if Angle at centre is 270 and Area is 1848 What are area and Angle at circle if Radius is 14 and Arc length is 55 What is radius if Angle at centre is 75 and Area is 154
  95. science

    What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s
  96. math;) Law of Cosines

    Two satellites are in Earth's orbit and are 424 km apart. If an observer is 658 km away from satellite A and 471 km away from satellite B, what angle must the observer turn his telescope to change his view from one satellite to another? a. 40.0 degrees b.
  97. science

    If your weight is 60 N on earths surface how far should you go from the centre of earth so that your weight will be 300 N ?(radius of earth is 4.4*10^6 m)
  98. physics

    Two satellites are in orbit around Mars with the same orbital radius. Satellite 2 has twice the mass of satellite 1. What is the centripetal acceleration of satellite?
  99. physics

    A rocket is used to place a satellite in orbit about a planet. The velocity of the satellite is 534 m/s and the radius of orbit is 1.21×108 m. What is the mass of planet?
  100. Math

    Marco is 350 m due east of the centre of the park. His friend Ray is 350 m due south of the centre of the park. Which is the correct expression for the exact distance between the two boys?