Why must the centre of the satellite orbit coincide with the centre of the Earth?

25,359 results, page 37

algebra with finance

A video game has been developed whereby the player must earn a certain number of experience points before progressing to the next level. On level 1, a player must earn 1 experience point. On level 2, a player must earn 4 experience points. On level 3, a player must earn 8 ...

Physics

The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...

physics 1

The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...

physic 1

The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...

physics

In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth. Suppose that at its ...

physics

In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth. Suppose that at its ...

physics

In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth. Suppose that at its ...

HELP

answers marked below 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 forces gravitational forces inertia-...

physics

A proton with charge mass ratio of 108 C/kg is moving in a circular orbit in a uniform magnetic field of 0.5T .Calculate the frequency of revolution.

Math(Dynamics)

To find the time taken by a planet to describe a given arc of its elliptic orbit starting from the nearer and of the major axis.

science

how is the air we breath today different from 3.6 billion years ago? http://en.wikipedia.org/wiki/Earth's_atmosphere#Evolution_of_the_Earth.27s_atmosphere http://eesc.columbia.edu/courses/ees/climate/lectures/earth.html

History

With which statement would BOTH FDR and Reagan agree? A. Government must protect freedom of speech. B. Government must resolve inequality of wealth. C. Government must hold businesses accountable. D. It is government’s role to resolve social problems.

Math

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ...

Mathematics

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ...

Math

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ...

MATH HELP

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the earth in miles ...

P.E.

Which of the following is not true about a soccer throw-in? A. Both hands must be on the ball. B. The ball must come completely behind the head. C. Both feet must stay in contact with the ground. D. The ball can be thrown in-bounds with sidespin Not sure which one it is can ...

science

If Earth is 149.6 million Kilometers from the sun, or 93 million miles away. suppose there was an imaginary road from earth to the sun. If you were in a car traveling 100 km an hour, it would take you 1,490,000 hours or just 170 years to reach the sun. If it took 170 years to ...

Physics

The acceleration due to gravity on the moon is about one sixth its value on earth. If a baseball reaches a height of 62 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m

Physics

If a projectile is launched from Earth with a speed equal to the escape speed, how high above the Earth's surface is it when its speed is three-fifths the escape speed? I keep getting the answer 2.56x10^6 m after solving it a few different ways. Help would be great.

PHYSICS

Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per square meter that reach the earth.

physics

Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per square meter that reach the earth.

physics

The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 78 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m

physics

Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 521 nm, determine the number of photons per second per square meter that reach the earth.

physics help pleaseee

In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth. Suppose that at its ...

Electric Fields

In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 151 N/C downward at an altitude of 280 m and 167 N/C downward at an altitude of 430 m. Calculate the volume charge density of the atmosphere, assuming it to be ...

Physics

A deorbit burn has been performed. During this deorbit burn a pre-calculated Delta V (change in velocity) of 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205 miles to 60 miles at perigee. The Shuttle’s Orbital Maneuvering System (OMS) engines...

electricity

What bias conditions must be present for the normal operation of a transistor amplifier? A)the emitter base junction must be reverse biased, and the collector base junction must be forward biased. B)the emitter base junction must be forward biased, and the collector base ...

Physics

What is the speed of the rocket when it is 350 above the surface of the earth? A rocket starts from rest and moves upward from the surface of the earth. For the first 10 of its motion, the vertical acceleration of the rocket is given by a(y)=2.9, where the -direction y+ is ...

physics

A dime is 1.8 cm in diameter. Earth's moon is 3.844´1010 cm from Earth and has a diameter of 3.76´108 cm. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon?

earth

how long does it take for light from Jupiter to come to earth. for example tonight the planet Jupiter can be seen by the moon, 2/25/12 and we see the light from the planet and how old is that light. thanks. jerry in colorado USA

physics

Mars Rover When the Mars rover was deployed on the surface of Mars in July 1997, radio signals took about 12 min to travel from Earth to the rover.How far was Mars from Earth at that time?

algebra please help

The weight M of an object on Mars varies directly as its weighton earth. A person who weighs 95 lb on earth weighs 38 lbs on Mars. How much would a 100 lb person weigh on Mars?

physics

A rocket cruising past earth at 0.800c shoots a bullet out the back door,opposite the rocket's motion,at 0.900c relative to the rocket. What is the bullet's speed relative to the earth?

History

How is the president's power to make appointments limited? A:He can only appoint law-makers B:He must make all appointments in the first 100 days of office C:The appointments must undergo judicial review D: The Senate must approve the appointments*** Is this correct?

Earth Science

In recent years, scientists have been concerned about decrease in the ozone content of earth’s upper atmosphere. What is the principle threat to humans if this decrease in ozone continues? My answer is, Decreasing precipitation leading to crop failure and possible human ...

English

Read the sentence from "Zoos: Joys or Jails?" Which best describes the author? "Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge. The wild animals in our world are a wonder, and they ...

physic's problem

GPE = MASS X GRAVITY X HEIGHT GRAVITY IS ALWAYS 10 M/S 2 (SQUARED) KE = 1/2 X MASS X SPEED 2 (SQUARED) I am uncertain what your question is. As a matter of interest, the value of 10m/s^2 for the acceleration of gravity is in error, in fact, it is never that value, but is less...

physics

The Sun and Earth each exert a gravitational force on the Moon. What is the ratio FSun/FEarth of these two forces? (The average Sun-Moon distance is equal to the Sun-Earth distance.)

9th Grade Journalism

Hi, this is my assignment. I did make it 30 words long but, I think it's terrible. It's very hard for me to do. Could someone please give me some suggestions as to what to change or improve please? You must draft a lead sentence for your news story about your chosen career in ...

chem

1. The total power used by humans worldwide is approximately 15 TW (terawatts). Sunlight striking the Earth provides 1.336 kW per square meter (assuming no clouds). The surface area of Earth is approximately 197,000,000 square miles. How much of Earth’s surface would we need...

science

could someone pleassssse help me answer these questions? do we always see the same side of the moon and how do you know for sure? if the moon rotated just asa quickly as earth , would we see the same sides of the moon from earth?explian.

Free Fall

The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 3.9 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X?

Math (Trig/pre-calculus)

some stars are so far away that their position appear fixed as earth orbits the sun. other stars, however, appear over time to shift their positions relative to the background of "fixed" stars. suppose that the star shown below appears to shift through an arc of theta = 0 ...

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 slow down global ...

Law

1. What requirement is imposed under Megan’s Law? A. Sex offenders must inform local law enforcement of their location and nature of their prior conviction. B. Each jurisdiction must create a local, multi-tiered sex offender registry. C. The felony records of all minors must...

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, to those on Earth?

physics

Suppose the straight-line distance between New York and San Francisco is 4.4 106 m (neglecting the curvature of the earth). A UFO is flying between these two cities at a speed of 0.69c relative to the earth. What do the voyagers aboard the UFO measure for this distance?

Physics

The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 64 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m Can you...

Physics

A 5.00 x 102 kg hot air balloon takes off from rest at the surface of the earth. The buoyant force lifts the balloon straight up, performing 9.70 x 104 J of work on the balloon. At the instant the balloon's upward speed is 4.08 m/s, the balloon will be ____ m above the surface...

Physics

why does an astronaut weigh less on the moon than on Earth? is it because the gravitational field strength is less on the moon's surface than on Earth's surface

Physics 11

How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!

physics

the gravity that sun has on the moon is about 2 times more than the gravity from earth so why doesn't moon run away from earth to sun?

physics

If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it when its speed is 1/9 of the escape speed?

physics

weight of a person in newton on mars who weigh 882N on earth ( g = 9.8m/s^2). weight of person on earth who weighs 333N on mars.

Maths Algebra

The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.

Physics

The mass of a certain planet is six times the mass of the earth and the diameter of the planet is twice the diameter of the earth. Find the acceleration od gravity on the surface of this planet. HELP ME SOLVE! THANKS!

Physics

The radius of the moon is approximately one quarter of the earth's radius,and its mass is on eightieth of the earth's mass.Calculate the weight of a man with a mass of 80KG on the surface of the moon

physics

a woman who weighs 150 lb. on earth would weigh 340 lb. on another planet, what is her mass on earth, what is her mass on the other planet, what is the magnitude of the gravitational field on the other planet

physics EM

Which of the following choices of path allow you to use Ampère’s law to find B(r). 1. The path must pass through the point r_vec. 2. The path must have enough symmetry so that B(r)x dl is constant along large parts of it. 3. The path must be a circle. choices are.... a only...

French

can someone please prrof read this for me please?and correct me if i have made any mistakes?thanks. J'habite a Morley,c'est un banlieue pres de centre ville. J'habite dans une maison au premier etage.c'est grand et anciens (ca date de 1850).au rez-de-chaussee, il y a un grand ...

space

Imagine that all gravity in the Universe was magically turned off (except the gravity of the Earth),and everything stopped moving.Earth's gravity will now begin to pull everything in the Universe slowly toward it. True or False?

physics

Goku wants to visit Andromaeda galaxy which is 2 million light years away from earth. If it takes 30 years in the frame of the spaceship to travel to Andromeda from earth, what should be the speed of the spaceship? Assume that the spaceship travels at constant speed

the earth

name the four layers of the earth in order from the outside to the center of the earth This site will not only give you the layers but a picture and a discription. http://volcano.und.edu/vwdocs/vwlessons/lessons/Earths_layers/Earths_layers2.html crust, mantle, outer core and ...

Physics

A triply ionized beryllium atom (Be3+) has only one electron in orbit about the nucleus. What is the radius of the ion when it is in the n = 9 excited state?

earth science

22. an illustration of the fact that a sudden and great _____ struck the earth is the millions fo mammoths and other large animals frozen instantly and preserved, whole and undamaged. catastrophe cold front ice age permafrost ice age right This also makes good sense.

earth science

Which of the following statements is TRUE? S-waves are able to pass through the Earth's core. Continental-continental plate convergence is reponsible for the creation of mountain ranges. Oceanic crust is on average about 60 - 100 km thick. The Richter Scale measures earthquake...

Biology-Is my answer correct

Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right? A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis of the ...

physics

The magnetic field of the Earth is 0.60 x 10-4 T in a certain location. a) What will be in Newtons the force on a completely ionized carbon atom (Z = 6, A = 12) traveling with the solar wind with a velocity of 10.50 x 103 m/s perpendicular to the magnetic field? b) How fast ...

physics

The magnetic field of the Earth is 0.50 x 10-4 T in a certain location. a) What will be in Newtons the force on a completely ionized carbon atom (Z = 6, A = 12) traveling with the solar wind with a velocity of 18.00 x 103 m/s perpendicular to the magnetic field? b) How fast ...

Physics

The mass of an astronaut is 72kg. (a) what is his weight on earth ( taking g to be 10N/kg) ? (b) if the astronaut is on the moon's surface where the acceleration due to gravity is one-sixth on the earth , calculate (I) the mass (ii) the weight of the astronaut Thanks for ...

Physics

Take the radius of the earth at the equator to be 6380 km a. Find the speed the speed of an object at the equator due to the earth's rotation. ___m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour

Physics

Take the radius of the earth at the equator to be 6380 km a. Find the speed the speed of an object at the equator due to the earth's rotation. ___m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour

chemistryyy

The escape velocity of planet earth is 11.2 km/s. At what temperature would helium atoms be able to escape the earth's gravitational pull? (Note: you're calculating the average speed here, which means roughly 50% of the atoms would escape at any given time)

main idea

The main conclusion you can draw from this paragraph is that A. because of the greenhouse effect, plants on Earth should thrive. B. a greenhouse helps plants to grow faster. C. the atmosphere keeps Earth warm D. in a greenhouse, the Sun's heat is trapped by the glass

Math

A probe launched from Earth to Mars is traveling at an average speed of 1.8 * 10^4 kilometers per hour. If the distance between Earth and Mars is approximately 2.25 * 10^6 kilometers, about how many hours will it take the probe to reach Mars? PLEASE EXPLAIN YOUR REASONING

brits orbit

find the twenty-first term of an A.S of which the 6th term is 3 and the 14th is 19

Physics

Which of the following statements for magnetism are true? (Give ALL correct answers) A) B does work on a charge only when the charge has a velocity component perpendicular to B. B) B acts only on charges at rest. C) B does work on a charge only when the charge has a velocity ...

Physics

If you weigh 670 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ? Take the mass of the sun to be ms = 1.99×1030 kg , the gravitational constant to be G = 6.67×10−11 N⋅m2/kg2...

Geometry

A globe sits on a geography teacher's desk. The diameter of the globe is 0.001 km. The earth has a diameter of 12, 713.54 km. Find the ratio of the volume of the globe to the volume of the earth.

physics

A pendulum has a period of 0.9 s period on Earth. An object is suspended from a spring with force constant 9.8 N/m. (d)Find the mass suspended from this spring that would result in a period of 0.9 s on Earth

science

how do jupiter's moons stay in orbit around jupiter? Gravity.

Physics

Can someone tell me what the mass of mars is compared to the earth? Mars mass is 6.39 × 10^23 and Earth mass is 5.972 × 10^24 thanks. :3

Physics

The space shuttle is in a 200-mile-high orbit. What is the shuttle's orbital period?

Math

You will be designing a park your park must contain the following a rectangle 100yds x 120yds . A picnic n playground area must be add up to be at least 1/2 of the park the picnic area must have a circular garden

Physics

Hi, I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an antique grandfather clock so that it would still keep accurate time on Mars. If the length of the pendulum on Earth is l, what should the length of...

Physics

Planet Earth as a Spring. Assume that the Earth is perfect sphere of mass M=5.98x10^24kg, radius 6,370km, and uniform density. Imagine a long, straight tunnel through the center of the Earth, connecting the North and South poles . A capsule of mass m is dropped into this ...

astronomy

A body has four times the mass of the Earth but its radius is two times larger. What is the acceleration of gravity on the surface of this planet? If you were on this planet, should you be able to jump (on average) farther distances, shorter distances or the same distances as ...

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 slow down global ...

Physics

A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 300 m. You can ignore air resistance. How much time is required for the bomb to reach the earth? 7.82s How ...

Physics

In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 600 N, to the ...

Science (Physics)

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is the mass on the ...

science

1. Why do earthquakes occur along the San Andreas Fault? a. Two plates meet at the San Andreas Fault and they slide next to each other causing earthquakes b. Two plates converge at the San Andreas Fault causing earthquakes*** c. Two plates pull apart at the San Andreas Fault ...

Nautical Studies

I understand it is a popular misconception that a magnetic compass points to the magnetic north pole. In fact a magnetic compass aligns itself with the magnetic lines of force in its own location. Here in the UK these lines of force seem to coincide very closely with the ...

Chemistry

What the difference between an orbit in the Bohr model and an orbital in the quantum mechanical model of the atom?

Physics

: a planet mass M is circling a star in an elliptical orbit it's velocity at R is 60000 m/s what is its velocity at RB? RB=8RA

Physics ( using earth to find pressure of planet y

3. A model of Earth’s interior: Look up the radius and mass of the Earth. Radius is 6,371 km Mass is 5.974 x 10^24 kg Calculate its average density. p_e = (5.974 x 10^24 kg)/ (4/3)pi r^3 = (5.974 x 10^24 kg)/ (4/3)pi (6371)^3 = 5.54 g/cm^3 Imagine a planet of the same radius...

Maths

I posted yesterday but feel I confused the issue with an incorrect calculation of an angle, I have just realised my mistake!. I also think I should come clean about my circumstances. I am a mature (very) student, in fact a retired commercial fisherman and am studying celestial...

Phyics

The average distance between Earth and the sun is 1.50e8 km. Calculate the average speed, in km/h, of Earth assuming a circular path about the sun. Use the equations v = 2r/T. Please ignore this question and view the question I have a few spaces above. The equation was not ...

physics

You weigh 516 N at sidewalk level outside the World Trade Center in New York City. Suppose that you ride from this level to the top of one of its 410 m towers. Ignoring Earth's rotation, how much less would you weigh there (because you are slightly farther from the center of ...

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100