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

9,298 results, page 41
1. ## physics!!!!!!!!!!!!!!!!!

A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
2. ## physics

A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
3. ## PHYSICS

A few years ago, a movie came out about a soldier, John Carter, who was transported to Mars and could perform amazing feats of strength and jumping due to the lower Martian gravity. The surface gravity of Mars is 0.38 times that of earth. If John could
4. ## Physics

The diameter of the Moon is 3480km. What is the volume of the Moon? How many Moons would be needed to create a volume equal to the Earth? How do you find the volume of the Moon from just the diameter? Also, does anybody know how to figure out the volume of
5. ## physics

Earth of mass 6×10^24 kg is in motion around the sun with a linear velocity of magnitude 30 km/s. a) Determine the magnitude of the linear momentum of the center of mass of Earth. b) Is this linear momentum conseved?
6. ## Math - Algebra

If a man wewighs 41 newtons (N) on the surface of the earth while he weighs 81.5N on the surface of the moon, approximately how much lighter is he on the moon? What would be his weight on the surface of the earth if he weighs 90 N on the surface of the
7. ## physics

If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
8. ## Science

Why is only one side of the moon visible from the earth at all times? Only one side of the moon is visible from the earth at all times because the other side is illuminated by the sun, which doesn't face us. Please correct me if I'm wrong, thanks :-)
9. ## physics

If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
10. ## algebra

an astronaut who weighs 85 kilograms on the earth weighs 14.2 kilograms on the moon. how much would a person weigh on the moon if they weigh 95 kilograms on earth? round your answer to the nearest tenth.
11. ## physics

an object of 3 kg is dropped from 2m above the ground. it takes a time interval of tE to reach the ground of the earth. if it is dropped on the moon, how long does it take to reach the ground? the a dure to g on the moon is 1/6 of that on the earth.
12. ## Math

The weight of an object on the planet Mercury is about 2/5 the weight of that object on the Earth. An object that weighs 30 pounds on Earth would weigh how many pounds on Mercury? Need solution because I think it is 7.5 but my parents think the answer is
13. ## College Physics

When searching for gold, measurements of g can be used find regions within the Earth where the density is larger than that of normal soil. Such measurements can also be used to find regions in which the density of the Earth is smaller than normal soil;
14. ## College Chemistry

I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know
15. ## Physics

How would a physics expert respond to the following suggestions made by three airline executives? Write a script of the expert's response for performance in front of the class. Airline Exectutive A: Since the earth rotates from west to east, we could
16. ## Math

How much time (in hour)does the earth take for1 rotation ? How much time (in hour) would the earth take for 123 rotation?
17. ## Math

Polar ice is about 3/4 of the 3% of Earth's fresh water. What fraction of all of Earth's water is polar ice?
18. ## math

An ant weights about 2*10 to the fifth power pounds. There are about 1*10 to the 15 power ants on Earth. How many pounds of ants are on Earth
19. ## chemistry

1. Calcuate the distance(km) from the Earth to the Moon if it takes light 1.3 seconds to make the trip? 2. Saturn is about 1.2 billionkm from Earth. How long does it take light to travel that distance? (I was only given the wave equation, Max Plancks

Read the following excerpt from H.G. Wells' The War of the Worlds, and answer the question that follows: The planet Mars, I scarcely need remind the reader, revolves about the sun at a mean distance of 140,000,000 miles, and the light and heat it receives
21. ## World Religions

Many people see life on earth as constant worry, physical poverty, spiritual alienation, sickness, hatred, mindless toil, and death. The ultimate goal of nirvana or being one with the Atman seems infinitely better than suffering on earth. For more

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.17 x 10^6 m/s. find the central force acting on the electron as it revolves in a circular orbit of radius 5.42 x 10^-11m.
23. ## Calculus

The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the
24. ## math

Studying for a final help. 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 aalso varies according to the elevation of an object? In oparticular, the weight of an object
25. ## physics

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 3.30 g at its outer end. This centrifuge is now used in a space capsule on the planet Mercury, where g mercury is 0.378 what it is on earth. How many rpm (in terms of n)
26. ## Physics

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from
27. ## Math

The Andromeda Constellation is the furthest object we can see with the unaided eye. It is about 22,000,000,000,000,000 km from Earth. Light travels in space at a speed of about 300,000 km/s. Calculate how many years light takes to reach Earth from the
28. ## English

Thank you very much for your suggestions. Here are some more sentences I'd like you to check. 1)The first-person narrator can coincide with a character in the story or the protagonist who recounts his life (also: who tells of/about his life, who narrates
29. ## Hard Calculus

The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the
30. ## 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
31. ## physics

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above
32. ## Physics

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force
33. ## Help with physics!

Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force
34. ## oceanography

1. How much of the total water at earth's surface is fresh water? 2. Of all the freshwater at the earth's surface, what percent is found as ice and glaciers? 3. What percent of all freshwater is groundwater? 4. What percent of the rainfall that falls on

the equatorial radius of the earth is approximately 3960 miles. suppose a wire is wrapped tightly around the earth at the equator. how much must this wire be lengthened if it is to be strung on 10 feet poles above the ground? (1 mile=5280 feet) delta y=
36. ## math

The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and
37. ## English

1. Students on Earth may also play soccer with students who live on Mars. 2. The students on Earth may also play soccer with the students who live on Mars. [Are both okay? Do they have the same meaning? Does 'the students on Earth' mean 'all the students
38. ## Math

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: , where
39. ## Math

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: , where
40. ## Physics

1.) The earth's radius is about 3956.52 mi. An object that has a mass of 20 kg is taken to a height of 160 km above the earth's surface. a. What is the mass of the object at this height? b. How much does the object weigh at this height?
41. ## Physics

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.1 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 50 m/s at an angle of
42. ## physics

An airplane is flying above the Earth's surface at a height of 10.9 km. The centripetal acceleration of the plane is 16.7 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km. Please
43. ## science

the sun sets, fully disappearing over the horizon as you lie on the beach, your eyes 10 cm above the sand. you immediately jump up, your eyes now 130 cm above the sand, and you can again see the top of the sun. If you count the number of seconds (=t) until
44. ## Physics

If the gravitational force on you is 670N on the earth, how strong is the gravitational force on you on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0km ? Take the mass of the sun to be ms = 1.99×1030kg , the
45. ## physics

On planet X, an object weighs 18.1 N. On planet B where the magnitude of the free-fall acceleration is 1.28 g (where g = 9.8 m/s 2 is the gravitational acceleration on Earth), the object weighs 37.9 N. The acceleration of gravity is 9.8 m/s 2 . What is the
46. ## Physics

A canoe has a velocity of 0.410m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity v⃗ c/r of the canoe relative to the river
47. ## physics

A canoe has velocity of 0.40m/s southwest relative to earth.the canoe is on a river that is flowing 0.50m/s east relative to earth find the velocity (magnitude and direction) of the canoe relative to the river.
48. ## physics

a spaceship is moving at 1000 m/s release a satellite of mass 1000 kg at a speed of 10 000 m/s. what is the mass of the spaceship if it slows down to a velocity of 910 m/s?
49. ## physics

a spaceship is moving at 1000 m/s release a satellite of mass 1000 kg at a speed of 10 000 m/s. what is the mass of the spaceship if it slows down to a velocity of 910 m/s?
50. ## Science

The words to use are: crust, moving, lithosphere, asthenosphere, upper mantle, volcanoes, semisolid The ___1___, which includes the ___2___ and part of the ___3___, is divided into plates that carry all of Earth's lands and oceans. These plates float on a

The Great Galaxy in Andromeda is about 2200000 light years from Earth. Light travels 5900000000000 miles in a year. How many miles is the Great Galaxy in Andromeda from Earth? I got 1.298* 10^20 miles. (This is the exponents unit)
52. ## Science

How would a geologist identify an igneous rock as intrusive? A. An intrusive rock has coarse grains because it cooled more slowly on the surface of the earth. B. An intrusive rock has coarse grains because it cooled more slowly beneath the surface of the
53. ## Science

When are tides in earth's oceans the highest? A. during the moon's waning gibbous phase. B. during the moon's waxing gibbous phase C. when the moon is at a right angle to the sun*** D. when the sun, Earth, and moon are in line
54. ## Science

Insolation refers to the amount of solar energy that reaches a body, such as a planet. the amount of heat energy contained in a beam of sunlight. the imaginary line that runs around Earth's middle. the spherical shape of Earth I don't know this one. The
55. ## Science

The Environmental Defense Fund, The Friends of the Earth, and The Natural Defense Council, are all divisions of The Environmental Protection Agency. True*** False After the first Earth Day, the Sierra Club expanded to 20 states in 1970. In 1971, the
56. ## physics

Suppose you had two small boxes, each containing 1.0 g of protons. (a) If one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the
57. ## Algebra

The graph shows data from a recent satellite internet connection. The cost was 90 cents at 10 minutes, and 180 at 20 minutes. The connection service billed at a rate of how many cents per minute?
58. ## physics

please check these 3: if the batteries in a portable CD player provide a terminal voltage of 12 V, what is the potential difference across the entire CD player? a. 3.0 V b. 4.0 V c. 6.0 V d. 12 V D two resistors having the same resistance value are wired
59. ## Social Studies

One reason for the difference between average temperatures in Rome when in Jan. the average temperature is 11 degrees Celsius and July average degree is 30 degree Celsius is: The amount of carbon dioxide present in the atmosphere The tilt of the Earth of
60. ## earth

A 5.0-kilogram sphere, starting from rest, falls freely 22 meters in 3.0 seconds near the surface of a planet. Compared to the acceleration due to gravity near Earth’s surface, the acceleration due to gravity near the surface of the planet is
61. ## physics

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. cannot_evaluate cannot_evaluate J (b) Calculate the kinetic energy that
62. ## Physics

For which of the following situations can the equation F = mg not be used to calculate the force due to gravity? a) The pull of gravity on an apple on the surface of the Earth. b) The pull of gravity on an airplane flying at an altitude of 8 km above the
63. ## Physics

A spacecraft in orbit around the moon measures its altitude by reflecting a pulsed 10Mz radio signal from the surface. If the spacecraft is 10km high what is the time between the emission of the pulse and the detection of the echo?
64. ## Trigonometry

a satellite camera takes a rectangular - shaped picture. the smallest region that can be photographed is a 4 - km by 6 - km rectangle. as the camera zooms out, the length l and width w of the rectangle increase at a rate of 3km/sec. how long does it take
65. ## phyisics

A computer to be used in a satellite must be able to withstand accelerations of up to 23 times the acceleration due to gravity. In a test to see if it meets this specification, the computer is bolted to a frame that is vibrated back and forth in simple
66. ## Math

A car travels due east with a speed of 42.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain
67. ## algebra

You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the
68. ## science

Mars is 48 million miles from earth. If a spaceship leaves Earth traveling toward Mars at 6 million miles per hour (m.p.h.). How long will it take the spaceship to arrive on Mars.
69. ## physiscs

if the largest mass that you could lift on earth is 150 Kg. What is the largest mass you could lift on the moon. My work 150kg/10NKg x/1.6Nkg on earth on the moon =24 kg on the moon
70. ## astronomy

a remote internet webpage may sometimes reach your computer by going through a geostationary satellite orbiting approx. 3.6x10^7m above earths surface. What is the minimum delay in seconds that the webpage takes to reach your computer.
71. ## Physics

(II) Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 5–44. The masses are mV = 0.815 mE, mj = 318 mE,
72. ## Science

The density of the sun's core is about 160 g/cm. The density of the earth's core is about 13.0 g/cm. About how many times denser is the sun's core than Earth's?
73. ## earth

#16 the inner core of the earth is solid because of increased__________ a> density and composition b> density and temperature c> temperature and pressure d> pressure and density
74. ## Physics

A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the density formula P=M/V, but i kept subbing in other formulas, but i get stuck..can
75. ## alegebra

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: , where
76. ## History

Which describe major achievements of Ferdinand Magellan’s exploration efforts? (Select all that apply.) Magellan proved the earth was round and could be sailed. Magellan proved the earth was much larger than expected. Magellan discovered the Incan Empire
77. ## Algebra

I've been looking for help on setting up this part of my homework so that I could finish it. If anyone can help, please do. Part 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
78. ## Physics

Suppose we had a straight tunnel, through Earth's center, to a point on the opposite side of the planet, and used it to deliver mail to the other side. With what speed would our packages pass through Earth's center. So: ag = (GM)/R2 Mins =
79. ## Coding and Billing in the medical field

PREOPERATIVE DIAGNOSES: 1. Left orbitonasal mass. 2. Dry eye syndrome. 3. Pseudophakia, both eyes. 4. Computerized tomography confirmed tumor left orbital, left nasal side. POSTOPERATIVE DIAGNOSES: Same with the addition of low-grade lymphoma, left
80. ## SCIENCE

Determine the mass of a person on the moon whose mass on Earth is 70 kg Determine the weight of a person on the moon whose weight on Earth is 148 lbs. How is the mutual gravitational force affected by changing the separation distance between two 1.0 kg
81. ## math

Earth exerts a force on an object equal to the objects weight. the object exerts a force on earth I think the answer is it equal zero?
82. ## Physics

The gravitational constant for Earth is gE = 9.8m/s2. The gravitational constant for the planet Mongo is 20 m/s2. If an object has a weight of 10 lbs on earth, what is its weight on Mongo?
83. ## Science

A day on Pluto lasts 6.39 times longer than a day in earth.If an Earth day lasts 24 hour how many hours is a day in Pluto?
84. ## Physics

At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.790 m/s^2 if the acceleration due to gravity at the surface has magnitude .
85. ## physics

If the sun is 372 times farther from the Earth than the Moon, and the Moon is falling around the earth at 1.4 mm/s, what is the rate that the Sun is "falling?" Is it 1/(372^2) or 7.22*10^-6 mm/s?
86. ## physics

Mercury orbits the Sun with an everage speed of 47,800,000 m/s. About how long does Mercury take to orbit the Sun? I'm quite confused.
87. ## physics

consider a star that orbits around Sagittarius A* in a circular orbit of 530 AU and the star's orbital speed is 2500 km/s, what is the orbital period

Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?
89. ## math

A Dish TV satellite dish is the shape of a paraboloid. The dish is 36 inches wide, and 8 inches deep. How many inches should the receiver be located from the vertex for optimal reception? (round to the nearest thousandth)
90. ## Physics

Jessica's weight is 540 Newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540N, then Jessica pulls on the Earth with a force of 540 Newtons that acts in the opposite direction. However, if Jessica stumbles while
91. ## Physics Gravity

The earth has a mass = 5.98 X 10^24 kg and the sun has a mass = 1.99 X 10^30 kg. They are separated, center to center, by r= 93 million miles = 150 million km. What is the size of the gravitational force acting on the earth due to the sun? Very confused by
92. ## calculus

A group of engineers is building a parabolic satellite dish whose shape will be formed by rotating the curve y=ax^2 about the y-axis. If the dish is to have a 6-foot diameter and a maximum depth of 2 feet, ﬁnd the value of a and the surface area (in
93. ## Probability/ Stats

Assume that it is known that 95 percent of the launching of satellites into orbit are successful. What is the probability that in the next four launching there will be. Not sure where to start. can someone help me with steps on how to find the answer?
94. ## physical science

If the asteroid is moving at a constant speed in its orbit, does this also mean it is moving at a constant velocity? Explain your answer.
95. ## How far of the Taurus form Earth?

How far of the Taurus form Earth? Answer in light year... Help me please.... The brightest star in the constellation of Taurus is Aldebaran (also known as Alpha Tau). An orange-red giant which is the thirteenth brightest star in the heavens, it was one of
96. ## Physics

A rocketship, travelling away from earth with a speed of 0.8c, sends regular radio signals which are received on Earth every 45.2 min. According to the rocketship astronauts, how frequently are the signals being sent? I really need help. Its a basic
97. ## physics

At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.20%? At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 2.0%? At what height above Earth's
98. ## physics

At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.20%? At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 2.0%? At what height above Earth's
99. ## physics

Hint: for part I use G = 6.67 times 10 to the negative 11. for part II, you don’t need to do the full calculation, you can just use your knowledge of how force of gravity depends on mass and separation distance. Compare the gravitational force on a 49 kg
100. ## Science/Weather

Satellite images help meteorologists in all the following ways except: a) monitoring changes in the strength of storms b) locating areas of high and low pressure systems. c) predicting rainfall amounts d) recording daily high and low temperatures. I think