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

25,660 results, page 76

1. ### Science

How much would 1kg weigh on the Moon if the pull of gravity there is about one-sixth of the pull of gravity on earth?

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
3. ### physics

A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?
4. ### Physics

A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?
5. ### Algebra

How do I calculate finding the weight of someone, on the earth's surface with a radius of 3900 miles, and their weight 625ft above the surface?
6. ### SCIENCE

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?
7. ### SCIENCE

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?
8. ### physics

Rank the microtidal forces on your own body, from greatest to least, produced by the:A. JupiterB. PlutoC. Earth greatest to least.
9. ### math

Which option best explains the sentence below in math terms? The Earth is covered by 30 percent land and 70 percent water.
10. ### science

in this place Friday comes before Thursday,fall comes before spring,and Mars is closer to the moon than earth?
11. ### Science

1)What is the Theory of Plate Tectonics? 2)What physical features are caused by plate tectonics? 3)What causes Earth's plates to move continuously?
12. ### science

Tom is markina locations of active volcanoes on a world map explain how the locations of the volcanoes are related to Earth's plates
13. ### math

the steps to a math quiz. the earth rotates once every 23 hours 36 minutes 4 seconds.how many seconds is that?
14. ### Physics

(a)Compute the value of G at a point in space that is 7.0X10^6 m from the center of the earth. What will be the value of G at a point with a radius twice that in (a)?
15. ### physics

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
16. ### physics

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
17. ### climate change

What would our climate be like if the earth was shaped like a cube instead of a sphere? thanks
18. ### physical

. On Earth the Mars rover had a weight of 9800 N. What will be its weight on mars where the acceleration due to gravity is 4 m/s
19. ### Earth Science

Which horizons are composed of unweathered rocks, weathered rocks, young soil, and q well-developed soil?
20. ### earth

The capital letter(s) that label a rock unit (e.g., KJk) on a geologic map represents the rock unit's
21. ### Science

The force of gravity on Jupiter is much stronger than the force of gravity on Earth. Which of the following explains why this is true?
22. ### geography

This reflects some heat back into space and traps some heat near the earth.
23. ### EARTH SCIENCE

Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES
24. ### physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
25. ### Physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
26. ### physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...
27. ### Math

1. 2/5 + -3/5= 2. M - 7/18 = -5/18 (must reduce) 3. R + 7/12 = -5/12
28. ### math

If x + 3/2 is an integer, then x must be what
29. ### math

what must be added to 2x^3 - 4x +9 to get 5x^ 3 -13
30. ### science

A hypothesis must be
31. ### Physics Thanks

Please help... Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is to ...
32. ### Science

Hey everyone I need some omework jelp as you can see.I'm not that well in Science so could you give me some tips? And i would like somr homework help for the following passge and answers. DIRECTIONS Read the paragraph and answer the questions. You can find examples of the ...
33. ### English

Read each sentence then underline the helping verbs and circle the main verbs 1.Books do furnish a room helping:do main:furnish 2.I am walking to school these days helping:am main:walking 3.The water line must have burst. helping:must have main:burst 4. I have told him not to ...
34. ### Shakesphere

In the novel; Twelfth Night A quote is stated: "And thus a whiligig if time brings in his revenges" I am to write an essay on this. I have put some ideas together, yet I am unable to create an intro. Could you help by giving me a few hints on how to start an essay revolving ...
35. ### Physics

4. A basketball is thrown from a height of 1.60(m), with an angle of 45o above the horizontal. (a) With what initial speed must the basketball be thrown so that it reaches the basket at the highest point of its trajectory? The basket is at a height of 3.05(m) above the ground...
36. ### greek mythology

1.All the following were writers of ancient Greek plays and poetry exept a.Homer b.Sophocles c.Joseph Campbell 2.Chaos gave birth to the following exept a.Uranus(heaven) b.Tartarus(under earth) c.Gaea(earth) 3.Gaea gave birth to the following exept a.mountains b.Pontus(sea) c....
37. ### EARTH SCIENCE

What is the relationship of climate to weathering (both chemical and mechanical)? Are certain climates more susceptible to certain types of weathering? Why or why not?
38. ### science

the acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
39. ### physics

The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
40. ### physic

The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
41. ### science

if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS
42. ### physics

free fall on the moon is 1.62m/s2 What is the lenght of the pendulum whos period on the moon mtches the period of 1.80m long on Earth?
43. ### scientific problem solving

a student wanted to know how his weight on mars would compare with his weight on earth. prentend that traveling to mars is possible.
44. ### Science plz help

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?
45. ### Science

If the distance from the moon to the Earth decrease from 230,000 miles (which it is today) to 20,000 miles, what affect would this have on the tides?
46. ### Physics

The gravitational field strenght on the moon is 1.63N/kg. If a rock on the moon weights 2000N, how much does the same rock weigh on the earth?
47. ### HELP>>PLZ

the vertical component of earth magnetic field at a place is root3 times the horizontal component.What is the value of angle of dip at this place?
48. ### science

If a scale model of the planets are built with Earth's diameter set to 10 centimeters, how big would the model of Jupiter have to be in centimeters?
49. ### physics

A seagull flies at a velocity of 10.00 m/s straight into the wind. (a) If it takes the bird 18.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind?
50. ### physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =
51. ### physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =
52. ### physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8m/s^2) W_{woman} =
53. ### physics

A 4.0 kg ceiling fan is placed 2.5 m above the floor. What is the gravitational potential energy of the fan(use Earth's value for gravitational acceleration)?
54. ### Astronomy

Why will detecting Earth-sized planets be much more difficult than finding Jupiter-sized planets around other stars?
55. ### SS plz help me plzzzzzzz

What are the two major forces that reshape earth? Describe how itworks. plz plz plz help me there are no answer choices hope u can still help
56. ### Physics

a stationary 25 kg object is located on a table near the surface of the earth. The coefficient of static friction between the surface is 0.50 and of kinetic friction is 0.30.
57. ### English

Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...
58. ### Science

Which star shown on the luminosity and temperature of stars graph in the Earth Science Reference Tables is currently at the Sun's final predicted stage of development, and how do you know? a. Polaris b. Procyon B c. Sirius d. Rigel
59. ### TO BOBPURSLEY

acceleartiononmoon= GMassmoon/radius^2 =G 7.35E22/(1.74E6)^2= G 2.43E10= = 6.67E-11*2.43E10= 1.62 m/s^2 or as a gravitational field constant= 1.62 N/kg I have no idea why you used the mass of Earth. were did you get a = r^-2 Gm from i thought that the equation was net force = ...
60. ### astronomy

Astronauts on the Moon look back at Earth, a distance of about 400,000 km away. If the cities of Washington, D.C. and New York are separated by 300 km, what will be the angle between them when viewed from the Moon?
61. ### EARTH SCIENCE

Do you foresee humans colonizing the planets and moons of our solar system in the long term future of our species? What kind of terraforming would be necessary to make this possible?
62. ### Science

Is the answer D? Thank you The earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component would not have been useful at that time? A) chloroplast B) nucleus C) plasma membrane D) mitochondrion
63. ### Literacy

Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D
64. ### Literacy

13. Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. The Economist and American Scientist C. Odyssey and Natural History D. Astronomy and Science ANSWER IS A
65. ### Earth/Space Science

In many ways, the floor of oceans is no better explored than space. Why could discoveries such as life around deep-sea hotspots not be investigated until the past few decades?
66. ### physics

a boy throws a stone straight upward with an initial speed of 15 m/s on the surface of the earth. what maximum height above the starting point will the stone reach before falling back down?
67. ### physics

A 19 turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 µT, and then in 0.195 s it is flipped 180°. An average emf of what magnitude is generated in the coil?
68. ### Physics

A proposed space station includes living quarters in a circular ring 46.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
69. ### Physics

Calculate the energy needed to accelerate a spaceship of mass 10,000 kg to a speed of 0.3c for intergalactic space exploration. Compare with the projected energy usage of the Earth in a decade~10^22J? well i don't know how to start the problem
70. ### Physics

A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
71. ### Physics

A jet aircraft is flying due south at 300 m/s at a place where the earth’s magnetic field is 80 µT. Find the potential difference between the wing tips if they are 25 m apart. Which tip has the higher potential?
72. ### math

a well of diameter 3 m is dug 14 m deep . the earth taken out of it has beem spread evenly all around of it in the shape of circular ring of width 4 m to form embankment. find the height of embankment .
73. ### History

Which describes a military strategy in which two forces simultaneously attack both flanks, or sides, of an enemy formation? a.Fabian strategy b.war of attrition c.scorched earth d.pincer movement d?
74. ### physics

On Earth a rock falls an unknown vertical distance from a resting position and lands in a lake. If it takes the rock 2.5 seconds to fall, how high is the cliff that the rock fell from?
75. ### writing

do you think that life on earth could become this difficult during your life time?what factor could cause to take place ?a story about that shows what life might be like in the world?
76. ### 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
77. ### algebra

Joe's electric made 17 customer calls last wk and 23 calls this week. How many calls must be made next week in order to maintain an average of at least 21 calls per week for the three week period? At least blank calls must be made to maintain an average of 21 calls per week.
78. ### Earth Science

Where are new volcanoes forming in Hawaii? I know the new volcanoe is Loihi but I'm not sure where it is forming.
79. ### Earth Science

Differentiate the composition and texture of a plutonic igneous rock and a volcanic igneous rock.
80. ### earth science

why is the arrival time for the p - wave earlier that the arrival of the s-wave the same seismograph station?
81. ### Earth science project

How do lost pet/pet ads predict earthquakes, procedure to do the project ?
82. ### geography

What part of a map tells the relationship of distance shown on the map to real distance on the Earth?
83. ### earth science

How are trenches related to plate boundaries? How are trenches explained by the theory of plate tectonics?
84. ### physics

How would your Mars weight compare to your earth weight if the acceleration due to gravity on Mars is 3.71 m/s2?
85. ### Physics

Gravity on the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 55.3 kg dune buggy on the moon?
86. ### Physics

What is the period of Earth's (nearly) circular motion around the Sun? (2*pi*r)/T 1 year (1 year)/(2*pi) (2*pi)/(1 year) 2*pi*(1 year)
87. ### earth science

How does the wavelength of the infrared portion of the electromagnetic spectrum differ from that of the visible portion of the spectrum?
88. ### Earth Space

If the temperature is rising, will condensation take place? (Or does it only take place when its cool?)
89. ### Math

The mass of Saturn is about 100 times the mass of Earth which is 5.97 x10^23 kg. How heavy is Saturn?
90. ### Physics

Q. Defined escape velocity obtain an expression for the escape velocity of a body from the surface of the earth?
91. ### earth science

the Julian calendar is the calendar we currently use. True or false. my guess is true
92. ### physics

The weight of an object is 480N on the earth and 120N on the moon,calculate the mass of the object on the moon
93. ### science

How are moon observations from space different from moon observations made on Earth? I think there is no deifference.
94. ### science

A rock sample weight 60N on earth. what would be the weight of the same rock on moon?
95. ### Maths

The speed of a point A due to the rotation of the earth is twice that of a point B.If A is on latitude 22°N.calculate the latitude of B
96. ### physics

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown...
97. ### Science, Astrenomey

This is my theory, read well if you wish to know the truth: according to the big bang, there is a equal amount of anti-matter to the matter, BUT nearly all that matter is missing! In this theory there was NO anti-matter when the earth was made. anti-matter is made when ...
98. ### Psychology 210

For this assignment, you will create a Microsoft® PowerPoint® presentation. Your presentation must briefly summarize how psychological disorders are classified including the role of the DSM IV. Your presentation must have at least one slide for each of the major classes of ...
99. ### Medical Records course

I know you can't give answers, but I have messaged my instructor three days ago and never got any response. Is there anyone who can clarify the given assignment? I do not want answers... thank you very much. :) Contrast the general responsibilities of records administrators ...
100. ### math

The Russian mathmatician Pafnuti L. Chebychev pved a remarkable theorem called Chebybchev's Inequality: In any data set, if p is the fraction of the data that lies within k standard deviations to either side of the mean, then p is greater than or equal to 1-1/k^2. a. According...