The Navstar Global Positioning System (GPS) utilizes a group of 24 satellites orbiting the Earth. Using "triangulation" and signals transmitted by these satellites, the position of a receiver on the Earth can be determined to within an accuracy of a

28,391 results
  1. science

    1) Which statement best demonstrates how data from a global positioning system (GPS) can be used to lessen the effects of a wildfire?(1 point) a) GPS data can be used by scientists to predict weather patterns that can lead to a wildfire. b) GPS data can be

  2. English

    1. Which of the following would not be a good strategy for delivering a speech? Make sure your presentation equipment is running properly. *Start talking over the audience to quiet them down. Use correct grammar and well-formed sentences. Look directly at

  3. science

    1. Which statement best demonstrates how data from a global positioning system (GPS) can be used to lessen the effects of a wildfire? A. GPS data can be used by first responders to calculate the safest route to a wildfire. B. GPS data can be used by people

  4. physics

    Two artificial satellites, 1 and 2, orbit the Earth in circular orbits having radii R1 and R2. If R2=2R1, the accelerations a2 and a1 of the satellites are related how?

  5. trig

    A space shuttle 200 miles above the earth is orbiting the. Earth once every 6 hours. how far does the shuttle travel in one hour? Note the radius of earth about 4000 miles.

  6. Physics Gravitational Force

    Geosynchronous satellites orbit the Earth at a distance of 42000km from the Earth's center. Their angular velocity at this height is the same as the rotation of the Earth, so they appear stationary at certain locations in the sky. What is the force acting

  7. physics

    The Navstar Global Positioning System (GPS) utilizes a group of 24 satellites orbiting the Earth. Using "triangulation" and signals transmitted by these satellites, the position of a receiver on the Earth can be determined to within an accuracy of a few

  8. Physics

    You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 248

  9. Science

    How do global positioning systems use elevation points on Earths system to find latitude and longitude A. By using signals from a network of satellite B. By using topographic maps C. By using satellite images D. By using photography

  10. Math

    I have two questions that I need help with. 1. Angle of Depression: A Global Positioning System satellite orbits 12,500 miles above Earth's surface. Find the angle of depression from the satellite to the horizon. Assume the radius of Earth is 4000 miles.

  11. Science

    Which is a difference between global and local winds? A. Local winds occur over a small area, while global winds occur over a large area. B. Local winds blow in from the ocean, while global winds do not. C. Local winds are considered breezes, while global

  12. Physics

    Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force on the astronaut here at

  13. Science

    Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less

  14. Physics

    Two satellites A and B of the same mass are orbiting Earth in concentric orbits. The distance of satellite B from Earth’s center is twice that of satellite A. What is the ratio of the tangential speed of B to that of A?

  15. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

  16. Pre- AP Physics

    The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of Newtons

  17. Statistics

    A car rental agency currently has 41 cars available, 28 of which have a GPS navigation system. Two cars are selected at random from these 41 cars. Find the probability that both of these cars have GPS navigation systems

  18. Geography

    Which method of showing Earth's surface relies on a network of orbital satellites? A. digital maps B. geographic information systems (GISs) C. Global Positioning System (GPS) D. Mercator projection

  19. 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

  20. Physics help quick!

    22. What does it mean for a force to act in accordance with an inverse square law? The square of the force is inversely proportional to the distance. The force decreases if the distance increases. The force is directly proportional to 1/r2 where r is the

  21. Physics

    The De-orbit Burn The Shuttle must reduce its velocity at a pre-calculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the de-orbit burn is performed. For this

  22. Physics

    Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 41 km away, 24° north of west, and the second team as 33 km away, 37° east of north. When the

  23. science

    Which statement best demonstrates how data from a globe positioning system GPS can be used to lessen the effects of a wildfire

  24. Science.

    1.Explain why the Earth orbits the Sun, but the moon orbits the Earth. 2.How does size impact gravitational force? 3. How do the Sun’s gravity and the Earth’s inertia keep us orbiting in the solar system?

  25. physics

    the polar-orbiting environmental satellites (POES) and some military satellites orbit at a much lower level in order to obtain more detailed information. POES complete an Earth orbit 14.1 times per day. What are the orbital speed and the altitude of POES?

  26. 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

  27. physics

    If the average speed of an orbiting space shuttle is 19600 mi/h, determine the time required for it to circle the Earth. Make sure you consider the fact that the shuttle is orbiting about 200 mi above the Earth's surface, and assume that the Earth's radius

  28. physics

    Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 42 km away, 21° north of west, and the second team as 29 km away, 37° east of north. When the

  29. Science

    ENHANCING COMMUNICATION WITH WAVES 1. Which of the following electro magnetic waves is not used for communication? A. Gamma rays *** B. microwaves C. Infrared waves D. Radio waves 2. When you speak into a cell phone, your sound waves must be converted into

  30. Science

    Do global positioning systems use elevation on Earths system to find latitude and longitude A. By using signals from a network of satellite B. By using topographic maps C. By using satellite images D. By using photography

  31. geometry

    The Hubble Space Telescope is orbiting Earth 600 km above Earth's surface. Earth's radius is about 6370 km. Use the Pythagorean Theorem to find he distance a from the telescope to Earth's horizon. Round your answer to the nearest ten kilometers.

  32. Science

    one year ago How many Global Positioning System (GPS) satellites are required to pinpoint your location on Earth’s surface? (1 point) 24 12 3 5 i think it's 4, but 4 is not an option

  33. Math

    A car rental agency charges ​$35 per day to rent a car and ​$14.95 per day for a global positioning system​ (GPS). Customers are charged for their full tank of gas at ​$3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule

  34. physics

    Compute the orbital radius of an earth satellite that has an equatorial orbit and always remains above a fixed point P on the earth's surface. Communication satellites have such "geosynchronous" orbits (see figure). These satellites are used to relay radio

  35. Stats

    A car rental agency currently has 43 cars available, 27 of which have a GPS navigation system. Two cars are selected at random from these 43 cars. Find the probability that both of these cars have GPS navigation systems. Round to four decimal places.

  36. Science

    The Environmental Defense Fund, The Friends of the Earth, and The Natural Defense Council, are all divisions of The Environmental Protection Agency. True*** False After the first Earth Day, the Sierra Club expanded to 20 states in 1970. In 1971, the

  37. geography

    Which method of showing Earth's surface relies on a network of orbital satellites? A. digital maps B. geographic information systems (GISs) C. Global Positioning System (GPS) D. Mercator projection

  38. Physics

    GPS can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of the several satellites orbiting Earth. If one of the satellites is at a distance of 20,000 km from you, what percent

  39. physics help please!!**

    A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.0 107 m. (Astronomical data needed for this problem can be found on the inside back cover of the text.) (a) Find the orbital period of such a satellite. hours (b) Find the

  40. science,

    1- If a satellite orbiting the Earth at a height of 150 km (93 miles) above the surface of the earth. Calculate the speed, acceleration and orbital period of the satellite. Using these given constants: M(earth) = 5.98 x 10^24 kg, R(earth) = 6.37 x 10^6 m).

  41. physics

    GPS satellites orbit the earth about 20,000 km above the surface of the earth. The radius of the earth is 6,371 km. What is the acceleration due to earth’s gravity on the GPS satellites? i've tried fooling around with the A = V^2/ R and V = 2pir/T

  42. Physics

    You have probably seen films of astronauts floating weightless in orbiting satellites. People often get the idea that the astronauts are weightless because they are so far from the gravity of the earth. Let us see if that explanation is correct. Typically,

  43. Technology

    Explain how the global positioning system can be used to help find lost children.

  44. science

    how have computers changed mapmaking in recent years? And What is the Global Positioning System?

  45. physics

    The average speed of an orbiting space shuttle is 20100 mi/h. The shuttle is orbiting about 196 mi above the Earth’s surface. Assume the Earth’s radius is 3963 mi. How long does it take to circle the Earth? Answer in units of h ( hours)

  46. physics

    Two Earth satellites, A and B, each of mass m = 960 kg, are launched into circular orbits around the Earth's center. Satellite A orbits at an altitude of 4500 km, and satellite B orbits at an altitude of 13600 km. a) What are the potential energies of the

  47. PHYSICS

    This is the exact problem from the paper and I got an answer of 4.2 * 10^7 and I was wondering if this was the right answer. What is the height above the earth's surface at which all synchronous satellites (regardless of mass) must be placed in orbit? The

  48. Science

    What challenges does Earth face as a result of global warming? What measures could society take to help reduce the rate of global warming? What are the environmental impacts of global warming? What do you predict will happen to Earth’s ecosystems if no

  49. chemistry

    Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth's oceans, because of their high heat capacity, can absorb heat and therefore act to slow

  50. chem

    Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth¡¯s oceans, because of their high heat capacity, can absorb heat and therefore act to

  51. Physics

    If an artificial earth satellite is in an orbit around the earth’s equator with a period of exactly 1 day, how does its motion look to an observer on the rotating earth if it orbits in the same direction as the earth turns? (Such an orbit is said to be

  52. 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?

  53. Math, Physics

    Calculate Earth's gravitational force on the ISS astronauts while orbiting at an altitude of 401.5 km above Earth’s surface.

  54. physics

    Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface.

  55. physics

    The Earth’s radius is about 6380 km. The space shuttle is orbiting about 275.0 km above Earth’s surface. If the average speed of the space shuttle is 23500 km/h, find the time required for it to circle Earth.

  56. Physics

    In the absence of external torques, the angular momentum of a system is conserved. An artificial satellite orbiting the Earth quadruples its kinetic energy. Assuming no external torques act on the system, the radius of the orbit will ... a. Decrease by a

  57. Physics

    An object is projected from a satellite orbiting 200 km above the surface of the earth. The object has a speed relative to the Earth of 2.85×104 m/s. What is its speed when it is very far from the earth?

  58. science

    The earth exerts a force of 2200N on an orbiting communications satellite that is 35mi above the earth..What is the magnitude of the force the satellite will exert on the earth??

  59. Physics

    Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 38 km away, 19deg north of west, and the second team as 28.7 km away, 35deg east of north. When

  60. physics

    Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 43 km away, 23° north of west, and the second team as 29 km away, 33° east of north. When the

  61. physics

    Two geological field teams are working in a remote area. A global positioning system (GPS) tracker at their base camp shows the location of the first team as 37 km away, 24° north of west, and the second team as 34 km away, 38° east of north. When the

  62. Physics

    Suppose one of the Global Positioning System satellites has a speed of 4.50 km/s at perigee and a speed of 3.52 km/s at apogee. If the distance from the center of the Earth to the satellite at perigee is 2.21×104 km, what is the corresponding distance at

  63. Math

    A car rental agency charges ​$35 per day to rent a car and ​$14.95 per day for a global positioning system​ (GPS). Customers are charged for their full tank of gas at ​$3.40 per gallon. A car has a 19 gallon tank and a GPS. a) Write a function rule

  64. Science help

    DESCRIBE some uses of satellites orbiting Earth. I need help! Will you help me?

  65. physics

    Each satellite in the Global Positioning System travels at 1.05 x 10^4 km/h. Determine, in kilometres, each satellite’s (a) orbital radius and (b) distance from the surface of Earth. I did r = (Gm)/v^2 and got 1.37 x 10^8 km for (a), but the answers are

  66. Physics

    GPS satellites are at altitudes of exactly 20000 km, where the acceleartion of gravity is only 5.8% of its surface value.What is the orbital speed of the GPS satelites to the nearest hour. I got 9774, but I know this is wrong any help would be greatly

  67. Physics - Satellite Motion

    The polar- orbiting environmental satellites (POES) and some military satellites orbit at a much lower level in order to obtain more detailed information. POES complete an Earth orbit 14.1 times per day. What are the orbital speed and the ltitude of the

  68. physics

    You have probably seen films of astronauts floating weightless in orbiting satellites. People often get the idea that the astronauts are weightless because they are so far from the gravity of the earth. Let us see if that explanation is correct. Typically,

  69. Physical Science

    How many satellites are used for transmitting GPS signals?

  70. Physics

    The average speed of an orbiting space shuttle is 19700 mi/h. The shuttle is orbiting about 125 mi above the Earth’s surface. Assume the Earth’s radius is 3963 mi. How long does it take to circle the earth? Answer in units of h.

  71. Physics please help

    Geosynchronous satellites orbit the Earth at an altitude of about 3.58×10^7 m. Given that the Earth's radius is 6.38×10^6 m and its mass is 5.97×10^24 kg, what is the magnitude of the gravitational acceleration at the altitude of one of these

  72. Physics

    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=

  73. ASAP SCIENCE

    In Simple sentences. 1.Explain why the Earth orbits the Sun, but the moon orbits the Earth. 2.How does size impact gravitational force? 3.How do the Sun’s gravity and the Earth’s inertia keep us orbiting in the solar system?

  74. physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-four times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites. Thank you!

  75. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-five times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

  76. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

  77. physics

    Two satellites are monitored as they orbit the earth,satellites Y is foure times as far from earth's centre as is satellite X. IF the period of revolution of satellite X is T. WHAT IS THE PERIOD OF REVOLUTION OF OF Y?

  78. Physics

    Al the astronaut has a weight of 1600 N when he is standing on the surface of earth. What is the force of gravity action on him when he is in space station orbiting earth at a distance of four earth radii from the center of the earth?

  79. Physics

    Some communication satellites are put into a circular geosynchronous orbit in which the satellite remains above a certain position on the earth's equator as it orbits. Such a satellite would always be in the same position in the sky as seen from the

  80. Physics

    The shuttle must perform the de-orbit burn to change its orbit so that the perigee, the point in the orbit closest to Earth, is inside of Earth's atmosphere. De-orbit maneuvers are done to lower the perigee of the orbit to 60 miles (or less). An altitude

  81. Physics

    The shuttle must perform the de-orbit burn to change its orbit so that the perigee, the point in the orbit closest to Earth, is inside of Earth's atmosphere. De-orbit maneuvers are done to lower the perigee of the orbit to 60 miles (or less). An altitude

  82. physics

    Which of these cannot occur? A) A satellite orbiting about the equator.B) A satellite orbiting about the Earth's poles.C) Actually all these can occur.D) A satellite orbiting about the Arctic Circle.

  83. 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

  84. E.L.A. PLEASE CHECK!

    Which choice best describes the underlined word or words in each sentence? For several decades, satellites around the earth have broadcast signals and monitored weather. Underlined is: satellites A- complete subject B- simple subject C- compound subject D-

  85. physics

    The De-orbit Burn The Shuttle must reduce its velocity at a pre-calculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the de-orbit burn is performed. For this

  86. Science Check answers

    2) What phenomenon naturally warms Earth's lower atmosphere and surface? • the formation of sunspots • changes in the shape of Earth's orbit • global warming (MY ANSWER) • the greenhouse effect 3) Which of the following is an example of human

  87. math chem

    Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth¡¯s oceans, because of their high heat capacity, can absorb heat and therefore act to

  88. Physics

    Suppose a planet is discovered orbiting a distant star with 13 times the mass of the Earth and 1/13 its radius. How does the escape speed on this planet compare with that of the Earth? Ve new ------- = ve earth

  89. science

    I need to know about the wind patterns, tides/high and low,or upwelling for the north sea,irish sea,and the bay of biscay Thank you for using the Jiskha Homework Help Forum. Here is what I find: 1.

  90. College Physics

    A 300 kg satellite is orbiting the earth with 20,352 km/h speed. Calculate the orbital radius in km. Assume G=7*(10^-11) N.m2/kg2 and Mass of earth = 6*(10^24) kg

  91. physics

    Calculate Earth’s gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth’s surface.

  92. Physics

    A space vehicle is orbiting Earth in a circular orbit with a radius of 10,300,000m. What is the minimum increase in speed that is needed for the vehicle to escape Earth's gravitational field? The mass of the Earth is 5.97x10^24 kg and G = 6.67x10^-11

  93. MAROECONOMICS

    Question 9 of 20 5.0 Points Investment includes the purchase of: A. stock options of Enron. B. software by an accounting firm. C. global positioning units for cruise missiles by the government. D. new chalk by a local school board.

  94. Physics

    What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

  95. Physics

    What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

  96. physics

    A satellite is in a circular orbit around the Earth at an altitude of 3.30 106 m. (a) Find the period of the orbit. (Hint: Modify Kepler's third law so it is suitable for objects orbiting the Earth rather than the Sun. The radius of the Earth is 6.38 106

  97. physics

    The Earth’s radius is about 6380 km. The space shuttle is orbiting about 300.1 km above Earth’s surface. If the average speed of the space shuttle is 25700 km/h, find the time required for it to circle Earth. Answer in units of h

  98. Lea408

    can someone please tell me if I am right Like optical scanners, capacitance fingerprint scanners generate an image of the ridges and valleys that make up a fingerprint. But instead of sensing the print using light, the capacitors use electrical current.

  99. high school

    The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of N.

  100. Science

    Compare the nature greenhouse effect process with the human induced. 2. What are the greenhouse gases? Which one is the biggest concern? 3. What are scientists doing to collect data? 4. What role does the carbon cycle play in this problem? 5. What are the

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