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

25,660 results, page 30

1. physics

In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
2. physics

In what height the gravitational force with which earth exerts on any object in distance is 5 times smaller than the gravitational force,with which earth exerts in the same object when that object is on earth?
3. computers? I think just a question.

what are some process used in different organizations to download and imput paper information into computerized systems so other can analyze? would this be like excel programs charts graphs etc.? 1. Manual retyping the paper information to a text file 2. Transmittal of scanned...
4. Science

most inferences about the characteristics of earth's mantle and core are based on a. the behavior of seismic waves in earth's interior b. chemical changes in exposed and weathered metamorphic rocks
5. science

Find the angular and linear velocities of a man due to the rotation of the earth if he standing A) at the equator B) in Muscat(latitude23.5) C) in oslo(latitude60) Take tha radius of the earth as 6380km
6. Physics

Szymon and Chris fly their balloon around the earth in 80 days. Taking the radius of the earth to be 6400 km, calculate their average speed in m/s. I did answered all the homework questions but I didn't know how to do this one?
7. Science

1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can ...
8. Quantitative Reasoning (math)

Your weight on the moon is relative to your weight on Earth. Neil Armstrong weighed 360 lbs. in his moon gear while on Earth, but on the moon he only weighed 60 lbs. What is the ratio of the Earth weight to the moon weight? How much would you weigh (approximately) on the moon?
9. Pre-Calculus

Can someone please help me with the following question. 1) The weight of an object above Earth can be modeled by a function of the form w(h)=(r/r+h)^2*"w , where r is the radius of Earth 0" (approximately 3950 miles)," h" is the distance above Earth's surface, and "w is the ...
10. Pre-Calc H.W. Help :)

Can someone please help me with the following question. 1) The weight of an object above Earth can be modeled by a function of the form w(h)=(r/r+h)^2*"w , where r is the radius of Earth 0" (approximately 3950 miles)," h" is the distance above Earth's surface, and "w is the ...
11. science

A 30 kg satellite and a 2,000 kg meteorite are 21 m away from each other. How much force exists between them?
12. social studies

How Might Satellite Images and Computers Help Geographers Improve Their Knowledge of the World?
13. Earth Science

If a major hurricane can generate 1.25 x 10 to the 19th power calories of energy per day, and this energy comes from condensation, how many liters of water must condense each day to form hurricane clouds and precipitation?
14. PHYSICS!

IMAGINE- a building 6400km. high. On the ground floor, a person weighs 175lbs when he steps on a spring scale how much would the man weigh on the same scale if he were standing at the top floor? HINT: Note that 6400km is also the radius of the earth so that the top floor is ...
15. College Physics

n the approximation that the Earth is a sphere of uniform density, it can be shown that the gravitational force it exerts on a mass m inside the Earth at a distance r from the center is mg(r/R), where R is the radius of the Earth. (Note that at the the surface and at the ...
16. science

other than jupiter having a solid core like earth what else does jupiter have in common with earth?{please help}
17. Physics

At what altitude above the Earth's surface would your weight be three-fourths of what it is at the Earth's surface? Assume re = 6.371 10^3 km.
18. physics

A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s^2. a)What is its speed when it is very far away from the earth?
19. Chemistry

the distance from the sun to earth is 1.496 x10 ^8 km. how long does it take light to travel from the sun to earth How do you solve this?
20. Math

The speed of light is 3x10^8 m/s. If the sun is 1.5 x10^11 meters from the earth, how many seconds does it take light to reach the earth?
21. Physics

At what height above the earth's surface. the acceleration due to gravity will be 1/9th of its value at the earth's surface. Re = 6400km
22. Science

Approximately what percentage of the estimated age of Earth does the Cenozoic Era represent and how do you know? look at pg. 9 in Earth Science Reference Tables? a. 1.4% b. 5.0% c. 11.9% d. 65.0%
23. science

if i weigh 100 lbs on earth and i went to another planet whose gravity is 15 times that of the earth, how much would i weigh
24. physics

Calculate the force of gravity on a 1-kg mass at Earth's surface. Mass of Earth is 6.0 x 10^24th powerkg and Radius is 6.4 x 10^6th power m
25. science

how do the fluxes of radiation help explain why air temperature near the earth's surface is higher than it is 2km above the earth's surface
26. physical science

when an astronaut orbits the earth, and is falling in a circle around the Earth, is he/it creating a CENTRIFUGAL force or a CENTRIPETAL force?
27. physics

At what altitude above the Earth's surface would your weight be two-thirds of what it is at the Earth's surface? (Assume Re = 6.371 103 km.)
28. physics

9. The surface of the earth is approximately 6,400 km from its center. If the mass of the earth is 6.0 x 1024 kg, what is the acceleration due to gravity near the surface?
29. physics

Imagine a planet that orbited the sun at a distance three times that of Earth. What would the period of that planet be in Earth years?
30. physics

Which of these three produces a greater tidal effect on you right now—the moon, the Earth, or the sunA) The sun.B) The Earth.C) The moon.
31. Physics

The force of gravity on the moon is said to be 1/6th of that on the earth .what would be the mass of 12kg weighed on the surface of the earth and moon
32. science

A man has a mass of 80.0kg is standing on the surface of the earth.(a)calculate the magnitude of the attractive force that the earth exerts on the man
33. trg

An earth embankment is 27 m long and has a cross-section shown in the diagram. Find the volume of earth needed to build the embankment.
34. Science

How many minutes are required for a radio signal to travel for Earth to a space station in Mars if the planet Mars is 7.83 x 10 to the 7th km from Earth?
35. physics

Compute your mass in kilograms (1 pound has a mass of 0.45 kg on Earth) and then your weight in Newton’s for the earth, moon, and several planets. Where are you heaviest?
36. physics

prove that the moon complete its one revolution around the earth in (27.3) days.distance of moon from the surface of the earth is (380000km).
37. physics

An object is projected from the surface of the earth with a speed of 2.73x10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance).
38. PHYSICS

An object weighs 480 N on earth. What would its weight be on a planet whose mass is twice the mass and ratio of the earth?
39. science

As the moon revolves around the Earth, it also rotates on its axis. Why is it that the the same side of the moon is always visible from Earth?
40. MATH

The moon's distance from the earth is 360000 km and its diameter subtends an angle of 31 minute at the of the observer on the earth . Find the radius of the moon.
41. Physics

Weight of an object on the surface is 100N . What will we it's weight a planet whose mass 10times that of earth and radius is 3 times as that of earth??

What makes the moon rise? a)Alignment of the stars 2) Earth's rotation 3) Moon orbits about the Earth Is the answer (2)?
43. Physics

Calculate the time it takes for a gamma ray to travel from the Sun to the Earth Distance (mean) Earth to Sun=1.5 e11 m
44. physics

the moon is 4*8 m away from the earth Aradar signal transmitted from the earth .How much will it take to reach the moon?
45. science

________ is the study of the earth. Just need to know if my answer or right or wrong. Thanks! :) Geology (Earth Science)
46. Algebra 1

There is three times as much water as land on Earth's surface. What percent of earth is covered by water?
47. earth

sam weighs 720N on the earth and 120N on the moon.what does this tell you about the value of gravity on the moon?
48. Science

Suppose the moon were closer to Earth. How would the force of gravity between Earth and the moon be different?
49. earth science

A different side of the moon faces the earth at different times of the month. True or false?
50. SCIENCE

AT WHAT HEIGHT ABOVE THE EARTH'S SURFACE DOES THE ACCELERATION DUE TO GRAVITY FALL TO 1% OF ITS VALUE AT THE EARTH SURFACE
51. physics

The Moon is about 3.8 X 105 km from the Earth. Show that its average orbital speed about Earth is 1026 m/s
52. physics

Calculate the force of gravity on a 16 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.
53. physics

During an eclipse, the Sun, Earth, and Moon are arranged in a line as shown in the figure below. There are two types of eclipse: (a) a lunar eclipse, when Earth is between the Sun and the Moon, and (b) a solar eclipse, when the Moon is between the Sun and Earth. Calculate the ...
54. Physics

A small compass is held horizontally, the center of its needle a distance of 0.460 m directly north of a long wire that is perpendicular to the earth's surface. When there is no current in the wire, the compass needle points due north, which is the direction of the horizontal ...
55. Math

an object’s weight on a planet is directly proportional to the mass of that planet and inversely proportional to the square of the radius of the planet. jupiter is 318 times as massive as Earth and has a radius 11 times as large as that of Earth. if Gordon weighs 100 pounds ...
56. English

1. Volunteer is not something that you must do. 2. Volunteer is not anything that you must do. 3. Volunteer is not a thing that you must do. 4. Volunteer is not the thing that you must do. 5. Volunteer is not an important thing that you must do. (What is the difference between...

Assume the earth is a uniform sphere and that its path around the sun is curcular. Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the US in one year is about 9.33 x 10^9 J b) Calculate the ...
58. science

Somewhere between Earth and the Moon, gravity from these two bodies on a space pod would canel. Is it closer to the Earth or the Moon? why?
59. phyics-universal gravity

Calculate the force of gravity on a spacecraft 6400 km (1 earth radii) above the Earth's surface if its mass is 1600 kg.
60. Physics

If a 1-kg mass fell toward Earth from a large distance where it had zero relative velocity, what would be the velocity at the Earth's surface?
61. physics

A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight?
62. Earth Science

Which Scientific hypothesis for the Origin of Life on Earth is most widely accepted.? What evidence is there for the hypothesis? Need help. I'm just not how to go with the question.
63. physics

A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
64. Science

If on earth you weigh 420 newtons, and the gravitational pull on the moon is 1/6 of what it is on earth. What would be your weight on the moon?? Please show work Thanks!! :)
65. Science

How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?
66. Physics

A man has a mass of 65kg on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?
67. physics

What is the ratio of the gravitational force on you when you are 5800 km above the Earth's surface versus when you are standing on the surface? (The Earth's radius is about 6400 km.)
68. phsics

A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
69. PHYSICS

An object weighs 480 N on earth. what would its weight be on a planet whose mass is twice the mass and half the ratio of the earth?

71. Physics

A raindrop has a mass of 5.9 10-7 kg and is falling near the surface of the earth. Calculate the magnitude of the gravitational force exerted in the following. (a) on the raindrop by the earth
72. physics

the rotation of earth is a period of 86164 seconds. the earth has a radius of 6380 km. how fast would you be moving due to earths rotation at the equator? also how fast would you be moving at a latitude of 27 degrees north of the equator? also calculate the centripetal ...
73. Physics

According to Anna, on Earth, Bob is on a spaceship moving at 0.8c towards Earth, and Carl, a little farther out, is on a spaceship moving a 0.9c towards Earth. According to Bob, how fast is Carl moving relative to Earth? (a) According to Bob, how fast and in what direction is ...
74. Earth Science

Can someone point me in the direction of information relating to: "Which earth spere is most affected by pollution?" I am leaning to atmosphere - due to global warming, but I would like to do more research. Thanks for the help.
75. math

The Earth rotates once every 24 hours. What is the angular speed of a point on the Earth's surface in rad/min. Give your answer to five decimal places. Use 3.14 for pi. (example units: m/s, mi/h)
76. physics

A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.25 s after liftoff, the rocket clears the top of its launch platform, 69 m above the ground. After an additional 4.80 s , it is 1.00 km above the ground. Calculate the magnitude of the ...
77. Algebra

Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles
78. math

What's the minimum. length of the arc on the cicumference of the earth,where a curvature of the horizon is appearent? OR---What's the max.length of cord,drawn on the cicumference of the earth,where length of the cord appears same as arc? Follow up 2nd question---At what ...
79. physics

gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?

81. science

Suppose the moon were closer to Earth. How would the force between Earth and the moon be different?
82. earth

if a person's mass is 50 kilograms approximately how much force is exerted on the person at earth surface
83. Phsyics

Determine the magnitude and direction of the gravitational force exerted a) on the Moon by Earth and b) on Earth by Moon.
84. Physics

The Moon is about 3.8e5 km from the Earth. Find its average orbital speed about the Earth.
85. Science

occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth.
86. Physics

Why is more fuel required for spacecraft to travel from the earth to the moon than to return from the moon to the earth?
87. earth

if n the diameter of the earth is 19.7Mm , what is in cm
88. Math And Physics

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...
89. physics

Assume that the earth is a uniform sphere and that its path around the sun is circular. (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 109 J. (...
90. Physics

Assume that the earth is a uniform sphere and that its path around the sun is circular. a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 109 J. b)...
91. Physics

You have just discovered a planetary system consisting of a star (Dagobahr) and its two planets: Rool and Krau. Planet Rool has an average orbital radius 3 times as big as planet Krau. If planet Rool orbits Dagobahr in 2 earth years (1earth year = 365 days). a) how long is the...
92. science

how long is earths orbit and its roatation?
93. Science

How does gravity help keep satellites in orbit?
94. science

comets orbit the sun in a what pattern
95. Math

The ratio of an object weights on Earth to its wieght on Neptune is 5:7. HOw much would a person who wieghs 150 pounds in Earth weigh on Neptune?
96. Earth Science

On the surface of the earth, it is approximately 6,200 miles from the equator to the north or south pole. How many miles is it between 2 parallels 1 degree apart?
97. physics

somewhere between earth and the moon gravity from these two bodies on a space pod would cancel. Is this location nearer to earth or the moon?
98. PHYSICS

The planet Trantor has triple the mass of Earth, but only twice Earth’s radius. Compute the acceleration due to gravity at the surface of Trantor
99. Chemistry

If the distance from the Earth to the moon is 3.84 x 105 km. How long would it take a radio wave with wavelength 413.8 m to travel from Earth to the moon? C=(lanbda)v & E=(h)v
100. Physics

A man has a mass of 80kg on the Earth's surface. Part A How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?