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

25,660 results, page 68

1. ### space

the pull of gravity between earth and the sun acts across how many kilometers of space.
2. ### Science (Chemistry)

The Average density of Earth is 5.52g/cm^3. What is its density in a. kg/m^3 b. lb/ft^3. Please help me set up these equations. Thank you!
3. ### chemistry

Why do Alkali Metals & Alkaline Earth Metals have so much difference in their properties?
4. ### geography

Into how many degrees of longitude is the Earth divided? My answer is 360 degrees. Am I correct?
5. ### physics

An engine draws water from a depth of 10 m from earth at aspeed of 2m/s at arate of 10 kg/10 s. What is the power of the engine?
6. ### Physics

How far above the surface of Earth would you weigh 63.6 percent of your surface weight?

Why do you think the earth's crust is thicker under land than under bodies of water?
8. ### Science Help

mass = 4.5 kg Compare and contrast the mass and weight of this bowling ball on Earth and the moon.
9. ### Physics~

The moon's gravity is one-sixth that of the earth. What is the period of a 0.25 m long pendulum on the moon?
10. ### physics

A canoe has a velocity of 0.31m/s southeast relative to the earth. The canoe is on a river that is flowing
11. ### physics

a pendulum is 0.75 meters long and has a period of 4.17seconds is this pendulum on the earth moon or mars?
12. ### biology

why is carbon so abundant in living things when oxygen is the most abundant element on earth
13. ### physics

The force of gravity on a box is 597 N on the surface of the Earth. Find the mass of the box.
14. ### physics

A body has mass 400kg on earth. What will be it mass on the moon if the Acceleration due to gravity is 9.8m/s2?
15. ### physics

Osmium is the densest metal on earth. It has a density of 22.61 g.cm–3. Which of the following best represents this density in kg.m–3?
16. ### Science

Does the tilt of the earth cause one hemisphere to be closer to the sun? True or false False.
17. ### Physics

1 m pendlum on Earth has a period of 2 s. What would it's period be on the moon where the acceleration due to gravity is 1.63 m/s2 ?
18. ### Earth science

If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ?
19. ### Earth science

If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ?
20. ### earth science

An element's atomic number is 52. How many electrons would an atom of this element have?
21. ### Chem-Temperature and Volume Relationships

What condition must be true when conducting temperature volume measurement? Why would a rubber balloon be a poor system for this kind of expirement? The general equation is (P1V1)/T1 = (P2V2)/T2 If V and T are being studied, then P must be held constant. Would you think P ...
22. ### org chem

My prof asked us the requisites for e delocalization. Sigma e delocalization -Must have c-h bond next to a sp2C Pi e delocalization -Must have sp3 lone pair attach to an sp2C. Prof said there are more requisites besides on what ive written. I think if it has high en? What is ...
23. ### Geometry

For what value of y must LMNP be a​ parallelogram? (A four-sided figure LMNP has two horizontal sides and two sides that fall from left to right. Figure LMNP has angles labeled as follows: L, 75 degrees; M, unlabeled; N, 75 degrees; P, y degrees. 75 degrees75° y degreesy° ...
24. ### Physics(check)

9)You are taking a road trip to the beach for Spring Break. You leave at 12:00pm. At 12:10 you stop for lunch 10 miles down the road. You get back on the road and travel 75 more miles and realize that you need to stop for gas. You notice that it is now 1:10pm. At this point in...
25. ### english grammar

I have learned active listen, when people talk you must really listen to other team members. Don’t jump to conclusion let people finish to talk. Make things clear for yourself and for the sender and let the sender know that you really understand him. I don’t like give ...
26. ### Algebra

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 earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: w=Cr -2 where C is a ...
27. ### inequality

Define a variable and write an inequality. Then solve. A local summer baseball team plays 20 games each season. So far, they have won 9 games and lost 2. How many more games must they win this season to win at least 75% of all their games? I don't know what define a variable ...
28. ### English

Writeacher, I downloaded a few details about modals expressing possiblity/probabity but I'm still doubtful about their use. My questions to you are numbers 1-2. Using modals to talk about the present: 1)Will / won't We use will and won’t when we are very sure: •She’ll be...
29. ### English

Writeacher, I downloaded a few details about modals expressing possibility/probability but I'm still doubtful about their use. My questions to you are numbers 1-2. Using modals to talk about the present: 1)Will / won't We use will and won’t when we are very sure: •She’ll...

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ...
31. ### trig pls.. help me

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ...
32. ### PhysicsIn what direction relative to north must ca

Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 due east of canoeist...
33. ### Science

1. Describe the landscape of the ocean floor. 2. (a) What is the Mid-Atlantic Ridge? (b) What is the relationship between an ocean ridge and an ocean trench? 3. What new technologies allowed scientists to confirm that the sea floors are spreading? 4. Hess hypothesized that new...
34. ### Scienc

World poplation grow each year,does this mean the mass off earth increases each year? Why?
35. ### Regents

Where is the site of the Regents countdown for Earth Science? It has the days, hours, minutes, etc. and I can't find it. Please help. Thank you.
36. ### earth science

As an observer travels due east or due west, what happens to the angle of Polaris?
37. ### Geology

I know that the earth quakes and shakes during a earthquake, but I do not understand how it moves. Can somebody explain how it moves?
38. ### Earth Science

can someone help me? wat is the difference between the scientific theory and the scientific law? plz and thank you
39. ### Nouns

Hawaii is one of the most beautiful places on earth. Would "places" be considered a noun??
40. ### Physic

How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface?
41. ### EARTH science

A 100-gram rock has a volume of 35 cubic centimeters. Find the density of the rock.
42. ### space

How many Earth Diameters would it take to reach the Sun 93,000,000 miles away?
43. ### Science

Ok, so I'm doing a project on the Earth's layers, and I just have a question on the model. DOES IT HAVE TO BE 3-D? If it is, I'm dead meat.
44. ### geometry

a globe of the earth measures 12 inches in a diameter. calculate the surface area and volume of this globe
45. ### Science

By what factor would your weight change if the earth's diameter were doubled and its mass were also doubled? Thanks :)
46. ### Earth Science

Were there any lessons learned from the Valdez Spill that helped contain the devastation of the BP spill in the gulf?
47. ### Science

Dingtu can lift a weight of 60 kg on the earth. How much will he be able to lift when on moon? A. 60 Kg B. 10 Kg C. 360 Kg D. 120 Kg
48. ### Physics

If an astronaut in full gear has a weight of 1150 N on Earth, how much will the astronaut weigh on the Moon?
49. ### Science

How can scientists use the geologic time scale by sequencing the events of the earth in a time line?
50. ### Science

How can scientists use the geologic time scale by sequencing the events of the earth in a time line?
51. ### physics

How might you determine the age of a star from an Earth-based telescope? What measurements might you make?
52. ### physics

How might you determine the age of a star from an Earth-based telescope? What measurements might you make?
53. ### physics

On Planet Y, the value of g is 12 m/s/s. If the human weighs 685 N on this planet, then how much woud he weigh on earth?
54. ### earth science

The gently sloping shallow area that extends from the continental shore is the called the continental?
55. ### Physics

What would the weight of an object that is 4N on the earth be on the moon (acceleration due to gravity on the moon is 1.62m/s2?
56. ### Physics Projectile Motion

What angle (from earth) should one shoot a projectile so that it reaches it's maximum?
57. ### physics

a 70 kg astronaut is loaded so heavily that he can jump only to a height of 10 cm on earth.how far can he jump on the moon?
58. ### Science

How does the position of Earth's axis at the March and September equinoxes compare to its position at the summer solstice?
59. ### Science

About 10 percent of the earth’s surface are covered with glaciers today. Where are most of these glaciers found
60. ### earth science

If a sample contains 50g of carbon14 and 50g nitrogen14 how many half lives has it undergone?
61. ### Science

How far does any object on Earth fall after being in free fall for 7.5 seconds? Remember g=9.81 m/s2
62. ### Algebra

The distance from the Earth to the sun is 93,000,000 miles. Write this number in scientific notation.
63. ### Science

List some of the atmospheric conditions that might be described as weather? What is the purpose of weather on the earth?
64. ### earth science

_____ currents assist in the transfer of energy from warmer climates to cooler climates
65. ### math

the scientific notatio of velocity of light velocity of sound distance between the sun and earth
66. ### maths

Angle of elevation of sun from earth is called? (A) sunset (b) sun's altitude (c) sunrise (d) none
67. ### Physics

An astronaut on earth has a weight of 850 N calculate his weight on the moon where the gravity is 5 times less
68. ### Earth Science

Compare the classification of minerals with the classification of rocks.
69. ### Science

Summarize the hydrologic cycle, and how important this cycle is to earth.
70. ### science

erthquake would be on earth as _______ would be on venus?
71. ### science

an earhquake would be on earth as ______ would be on venus?

73. ### earth

Plate Tectonic Theory: What evidence that supports this theory?
74. ### earth

Plate Tectonic Theory: What evidence that supports this theory?
75. ### physics

A woman has a mass of 42.9 kg. What is her weight on earth? and what is her weight on the moon, where g=1.17 m/s2
76. ### Earth science

what are the causes of groundwater contamination? How can you stop the contamination?
77. ### Science

full composition that explains the composition of the earth’s layers
78. ### Science

How is the water in icebergs involved in the water cycle on Earth?
79. ### Tides

What astronomical bodies are most responsible for the tides on earth?
80. ### Help Science!!! :( need help

Is earth an inner planet or outer planet???
81. ### PHYSICS

Sun..BLANK....than moon. earth iS..BLANK... mercury.
82. ### physics

At what altitude the value of g becomes 3/4 of its value on the surface of earth?
83. ### science

at what altitude the value of g becomes 3/4 of its value on the surface of earth ?
84. ### physics

realation between earth gravity and moon gravity
85. ### Physics

A person weighs 600 N on Earth. What is the person's mass?
86. ### Chemistry

Which of the following statements are false regarding using a solid drying agent? (select all that apply) a) Water can be present due to isolation and/or purification conditions b) A good drying agent must be soluble in organic solvent c) One type of drying agent is sodium ...
87. ### french

Here is my last post for a little bit I have two questions one Mme when ever you reply all the accents on my screen turn weird is there a problem with that? and here are 3 more with english and french Saint-Louis-Du-Ha!-Ha! English If you are going to book an event why not do ...

(I have no idea how to even approach this question. Can anyone please help me?) Some people have proposed that the earth could solve its population problem by shipping people off to space colonies, each containing about 10,000 people. Assuming that we could build such large-...
89. ### physics

i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doubt if ...
90. ### Math

Working with simple addition and multiplication of positive and negative numbers. Have completed 59 of 60 problems on a worksheet, I am stumped by one of them. For example Two numbers are given 30 and 13, You must find two number multiplied together equal -30 and when added ...
91. ### Alg2

A video store has 8 new releases this week. Each is available on videotape and on DVD. How many ways can a customer choose a new release and a format to rent? answer here How many ways can six different books be arranged on a shelf if one of the books is a dictionary and it ...
92. ### english

Please don't just give me the answer, because I won't learn that way. I am home schooled, and my parents are at work during the day. 9. Which sentence corrects the following sentence? The final decision must be made by Ellen and he. (1 point) A. The final decision must be made...

Describe a sporting situation that has quadratic characteristics. Use key terms such as maximum or minimum, starting or ending points(ordered pairs), shape, vertex, etc. to explain why the situation could be considered to have quadratic characteristics. A complete response ...
94. ### Math

I have no idea, but I guessed 5 pieces won out of 15. Anyhow here is the question. During an art contest at your school, you and a classmate each won blue ribbons for 1/3 of the pieces you entered in the contest. You won 2 blue ribbons and your classmate won 3 blue ribbons. ...
95. ### 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...
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. ### Algebra

'L' has y-intercept (0,-3) and is parallel to the line with equation y=2/3x+1. (Instructions - write the equation of the line 'L' satisfying the given geometric conditions) We know that two lines that are parallel must have the same slope. So this line must have the slope (2/3...
98. ### physics

consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a. downward b.northward c.westward d.woutheastward
99. ### a&p

If an astronaut returned to earth after a 180 day stay in a weightless space station he would have a decrease in bone mass? true or false?
100. ### science

Would you say,as a whole,we who live on the earth,are living sustainable or unstainable lifestyles.Why? Also in what ways might we be wasting our natural capital?