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

9,298 results, page 58
1. ## Physics

What would our seasons be like if the rotation of the Earth's was aligned with the plane of the ecliptic so that the north pole pointed directly at the Sun once per year.
2. ## Physics 203

An object is projected upward from the surface of the Earth with an initial speed of 4.6 km/s. Find the maximum height it reaches.
3. ## Geology

Why isn't the land surface of Earth flat after millions of years of erosion by mass wasting as well as by other erosional agents?
4. ## Earth science

Why didn't the early geologic time scale include the number of years ago that events happened?
5. ## Physical Geography, Earth Science

How do you label a Tectonic Map of Hypothetical Ocean Basin? I have to draw in the plate boundaries.
6. ## Earth Science

I need help finding the geological time scale of stone mountain georgia, with a longitudinal, and latitude map of the area.
7. ## Math

Let d(t) be the shortest distance between Earth and the nearest other planet as a function of time t (where t is in years and t = 0 is noon on January 1, 1000 A.D., say). Is d continuous? Why or why not?
8. ## Science - Weather

Describe what would happen to the temperature on Earth if the amount of energy reflected back to space a) increased to 80% b) decreased to 5%
9. ## Physics

On some planet other than Earth a ball is thrown upward at a velocity of 22.3 m/s. It returns back to the exact position that it started at in 8.8s. What is this planets value for "g"? (
10. ## Earth Science

why didn't the early geologic time scale include the number of years ago that events happened?
11. ## chemistry

A bird is flying around the world at a rate of 26.4 ft/sec. How many days will it take to complete its journey? (circumference of earth = 25,000 miles)
12. ## Basic electricity

A body having a mass of 4.5kg is supported 30kg above earth surface calculate the portential energy take 10kg?
13. ## physics

an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?
14. ## Earth Science

do you think that the earthquake that affected japan should have a impact on the nuclear issues for the united states ? DONT UNDERSTAND THIS QUESTION AT ALL !
15. ## physics

we have learnt that Earth's gravitational field strength is 10 N/kg is the same as its acceleration due to free fall (10 m/s/s. even though their units are different, they are said to be dimentionally the same. prove that N/kg is the same as m/s/s
16. ## Physics

1. What evidence did ancient Greek astronomers have that Earth does NOT move? The answer is because of the lack of parallax, but then there's a follow-up question... 2. How do we knoew it DOES?
17. ## Science

List at least three atmospheric properties that might change as you traveled from the Earth's surface to space. Temperature, gases, air pollutants?
18. ## physics

a watermelon has a mass of 8kg and 600 g . how mich force of gravity of the earthwill it experience ?what will be its weight on the earth and the moo
19. ## Marketing

Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.
20. ## earth science

Info on the largest earthquakes http://earthquake.usgs.gov/regional/world/historical.php
21. ## physic

What does "seven earths" as mentioned in surah al-Talaq acctually mean? It means that, according to the Quran, Allah created seven heavens, each contining one earth.
22. ## Science (again)

Can Somebody plz help me with me question below, I didn't really get Mr. James's explanation for further reading. Precession means the axis of the Earth is changing, so North changes.
23. ## Science

How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?
24. ## chemistry

how long would it take a radio wave with a frequency of 7.25 x 10to the 5th to travel from Mars to earth if the distance is approx. 8.0 x 10 to the 7th?

List three things aboout Minerals of the Earth Crust Author Holt Rinehart & Winston
26. ## Science one question dont understand plz help ASAP

i know that from earth to the moon is 238,855 miles but i don't know how much that is in months
27. ## chemistry

why does a weather balloon get bigger as as it rises from Earth's surface? I don't understand how this relates to "kinetic molecular theory"
28. ## Physics

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
29. ## Physics

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
30. ## earth science

#31 strike slips faults are most likely to occur along which type of plate boundary? a. convergent b. transform c. transcontinental d. divergent
31. ## science

how does heat flow and movement of material within Earth move the continents,cause earthquakes and volcanic eruptions and create mountains
32. ## Physics

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
33. ## Math

The Andromenia Spiral is a galaxy 2,200,000 light years from Earth. write this distance in scientific notation
34. ## bio

Can someone provide me the help to explain this statement: "An important step in the history of life on Earth was the evolution of eukaryotic cells from prokaryotes"
35. ## Earth Science

Explain why the following statement is incorrect: Climatologists use the data from ice cores to directly measure past temperatures.
36. ## math

in 1933 wiley post flew around the world in 7 DAYS 18 HOURS. WILEYS TRIP WOULD BEST BE DESCRIBED AS FLYING AROUND THE ? OF TEH EARTH.
37. ## English

Description: does anyone has teas 6, the new version , passage about new York central park, earth cousin, or time management , if i anyone has it let me know am willing to pay anything for it
38. ## earth science

which of the following surfaces would absorb the least amount of insolation? 1. an open field 2. a forest 3. an asphalt parking lot 4. a glacier
39. ## SOCIAL STUDIES

What are the three forces that change the shape of the land and what are the effects do they have on the earth? http://en.wikipedia.org/wiki/Erosion
40. ## English

What is the meaning behind this quote: you've gotta dance like there's nobody watching love like you'll never be hurt sing like there's nobody listening and live like it's heaven on earth
41. ## physics

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
42. ## physics

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
43. ## Physics

Understanding Newton's First and Second Laws, why do all objets near Earth accelerate at a constant rate "g"? I'm very confused, is it something about how inertia keeps the objects accelerating? Please help , thank you.
44. ## Science

It can be inferred from the passage that radioactive dating is important for estimating the age of A) all known meters B) all existing planets C) the earth D) the trees
45. ## PHYSICS

IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?
46. ## Technology & Society

According to the text, by 2050, it is believed that __________ of the earth's species will become extinct if rain forest destruction continues. A. 6% B. 14% C. 25% D. 50% I think it's C., but not sure
47. ## Science

Cassie is writing an equation to show the effect of gravitational pull of the sun and moon on tidal range which equation would Cassie use to show the effect of the sun and the moon on Spring tides? A - sun + moon = spring tides B - sun + Earth = spring
48. ## Science

Cassie is writing an equation to show the effect of gravitational pull of the sun and moon on tidal range which equation would Cassie use to show the effect of the sun and the moon on Spring tides? A - sun + moon = spring tides B - sun + Earth = spring
49. ## Silent Night in Cheyenne

For anyone interested in Native American, here is what is sung to the tune of Silent Night. Pavetaa'eva nehe'xoveva Tsexho'ehnese ho'eva, Jesus Vo'estanevestomanehe. Ehvo'estanetsehestaotsehoo'o Tsexho'eotsestomotahaetse Vo'estanevehahtsestotse. Ahaa
50. ## Physics

Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is
51. ## physics.

Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is
52. ## Precalc

okay sorry last two questions! I promise! The sun always illuminates half of the moon’s surface, except during a lunar eclipse. The illuminated portion of the moon visible from Earth varies as it revolves around Earth resulting in the phases of the moon.
53. ## algebra

You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on
54. ## Literature (revision)

Could someone please read over these and tell me if I have them anywhere near correct. Thank you 1. Compare Equaino's treatment that he receives during his enslavement with his treatment on the slave ship. Although some aspects of Equiano's treatmen during
55. ## physics

Suppose that the displacement of a particle is related to time according to the expression delta x = ct^3. What are the SI units of the proportionality constant c? My answer: delta x = ct^3 m = c s^3 (s: seconds) m/s^3= c The SI units for c: m/s^3 correct?

Gabriele enters an east-w straight bike path at the 3.0-km mark and rides w at a constant speed of 8.0 m/s. At the same time, Xena rides east from the1.0-km mark at a constant speed of 6.0 m/s. 1. Write function x(t) that describe the position of Gabriele
57. ## Physical Science Question 3

Compare the visible part of the ear to a satellite dish in terms of form and function. I will be happy to critique your thinking on this. WTF bobpursley? You are of no help to me on any of this! If I want you to "critique my thinking" I was ask you to, but
58. ## MAT/117- Appendix E

Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting.

1. A 2. C 3. A 4. D 1. Coal, oil, and natural gas are inexpensive sources of fuel which do not cause pollution when used. A. true B. false 2. One reason people around the world use coal as an energy source is: A. It is nonrenewable. B. it can be found many
60. ## calculus

Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by plants and animals on the surface of the earth. It has a half-life (the time it takes for half the amount of a sample to decay) of approximately 5730 years. Using
61. ## English

Which of the following is a simple sentence? A. Many are called, but few are chosen B. A penny saved is a penny earned C. Fools rush in where angels fear to tread D. If at first you don’t succeed, try, try again 2. Which of the following is a compound
62. ## Writing Evaluation (Writeacher)

Should I revise anything? In my opinion, the use of “scary things” as entertainment is redundant. I mean, honestly, what on earth is so enjoyable about fear? Fear is what haunts us and frightened us even as young children. Yes, we are taught to face
63. ## world history

Which of the following is NOT true about the arms race between the United States and the Soviet Union during the cold war? A. The Soviet Union created the first man-made satellite, prompting the United States to develop the National Aeronautics and Space
64. ## Science

Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical
65. ## Astronomy help!

The average speed of stars relative to the Sun in the solar neighborhood is about 20 km/s (this is the speed at which we see stars moving toward or away from the Sun - NOT their orbital speed). Suppose you discover a star in a solar neighborhood that is
66. ## coulomb law and gauss law Physics

Two negative particles of charge=-Q and mass=rn orbits a stationary, positive particle of charge=+2Q at a radius= R' They are always at diametrically opposite points on the orbit. a. Find the total inward Coulomb force on one negative particle. b. Write
67. ## physics

What is the magnitude of the apparent weight of a 69 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
68. ## physics

An american system of communication is based on the radio frequency of 76 Hz. Compute the wavelength of theses waves and compare it to the diameter of the earth.
69. ## Social studies

I think its A. What is a limitation of any map? A. It shows only a part of the Earth. B. There is always some distortion. C. The scale affects what can be shown accurately. D. The seas are never in exactly the right location
70. ## Earth Science

In what ways can sea level be lowered? What effect might this have on existing life forms? I can't find it in my textbook. Can somebody helps??????? THANKS A LOT!!!!!
71. ## Earth Science

What two types of air masses collide to form a dry line? On which side of this boundary would you expect to see rising motion, and why?
72. ## EARTH SCIENCE

Which of the following is NOT considered a form of electromagnectic radiaction? a-radio waves b-gravity c gamma rayas d visible light e- x-rays I think is B
73. ## Earth Science

i need to find out how many rabbits it would take to eat 24.447,000 dandelions in 30 minutes at a rate of one dandelion in 7 seconds... any ideas how to set this up?

The moon is about 240.000 miles from Earth. What is this distance written as a whole number multiplied by the power of ten?
75. ## earth space science

A chemical sedimentary rock that forms mainly in restricted ocean basins in areas with high evaporation rates is an
76. ## Physics

What is the magnitude of the apparent weight of a 65 astronaut 3600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
77. ## Science

Am I correct? Which of the following is an example of human impact on climate changes? • the greenhouse effect • changes in solar output • global warming • changes in the tilt of Earth's axis
78. ## SCIENCE

ON A PLANET IN THE YEAR 2000 YOU ARE OBSERVING AMERICA'S BICENTENNIAL CELEBRATION IN BOSTON, MASSACHUETTS. HOW MANY LIGHT YEARS AWAY ARE YOU FROM EARTH. HOW FAR ARE YOU IN KILOMETERS
79. ## Social Studies

Monk's Mound, the largest structure at Cahokia Mounds was built entirely out of A. earth. B. mudbricks.* C. stone blocks. D. adobe.
80. ## Earth

Has the issue of global warming been solved already? I mean, the Kyoto accord will expire in 2012. And are the glaciers of the North & South Pole melting even more?
81. ## Physics

A rotating cylinder 7.95 kilometers in radius is designed to be used as a space colony. With what period must it rotate so the residents on it feel as heavy as they would on Earth?
82. ## Earth Science

which of the following locations in New York State is most likely to have the smallest range in temperature? 1. Long Island 2. the Catskills 3. Albany 4. the Adirondack Mountains
83. ## Life Sciene

How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on earth.
84. ## Earth Science to Ms.Sue

7.   What gives the gem amethyst its purplish color? A. Quartz B. Titanium C. Oxygen D. Iron The answer was not A, got this question wrong.
85. ## Science

True/false Earth's atmosphere oceans and continents began to form during the first several hundred million years of the Precambrian time.
86. ## geography

Can you please suggest a site where I can go to help me answer this question? My book is not helping! What imaginary lines divide the Earth into the Eastern and Western Hemispheres?
87. ## earth science

Which type of sedimentary rock is formed from fragments of minerals or rocks? (Points : 3) clastic chemical intrusive organic
88. ## Science

19. Which of the following base unit definitions was changed from being based on an arc of the earth to a time interval of light? second kilogram meter candela
89. ## Calculus

Assuming the earth is a perfect sphere of raius 3950 miles, find (in inches) d. d, is the difference between the arc and a straight line.
90. ## History help

Weathering and erosion break down rocks and slowly create a) oxygen for plants. b) Earth's poles. c) tectonic plates. d) new landforms.***
91. ## English

In the sentence - Plenty of silicon is found on Earth, but it remains a valuable material for the computer industry. What is the simple subject and predicate?
92. ## Living environment

1.All of Earth's water, land, and atmosphere within which life exists is known as a population b. an ecosystem c.the biosphere d. a biotic community IS THE ANSWER C
93. ## world geography

The most accurate representation of the earth is a(n) ______. Azimuthal equidistant globe relief map Winkel Tripel projection
94. ## 7th grade social studies

In the Earth's Sourthern Hemisphere, what season begins in March? Spring Summer Fall Winter
95. ## physics

What is the magnitude of the apparent weight of a 79 astronaut 5200 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
96. ## Earth Science

determine the slope of an area, given the following: Start measuring at 700ft. measure a distance of 4 miles, and end at an elevation of 2432ft
97. ## Earth Science

Where in the Atlantic Ocean would you expect surface water to sink and initiate a subsurface flow. List the reason(s) for your choice(s).
98. ## Trigonometry

Assume that Earth's surface is a sphere of radius 12000/pi miles. In an hour how far can Felix "Travel" if he is stationary at a position on the equator?
99. ## trigonometry

assuming that Earth's radius is 6400 km, find the linear velocity of Quito, Equador, a city on the equator. (Use pi=3.1416 and 1.6 km=1 mile).
100. ## Physics

If a person weighs 500 N on Earth, what would she weigh on Jupiter, where the acceleration due to gravity is 26 m/s2? Show all work leading to your answer.