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

24,970 results, page 31

### Math BOBPURSLEY HELP HELP HELP HELP

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 ...

### earth

A man with a weight of 1000 newtons on earth visits each planet what is his weight on each?

### earth and sun

express the distance of the earth from the sun using exponential notation

### earth

If a satalite weighs 90 kg at 10000 miles from the earth, how far away is it when it weighs 10 kg?

### physics

A student on Earth has a mass of 55.5 kg. With how much force does the Earth pull on the student?

### ^NeEd HeLp^

What iz d. location ov d. MOON with respect 2 d. EARTH? that iz, iz d. MOON inside or outside ov d. EARTH?

### English

1. In which of the following selections is point of view used to highlight contradictions in what is being described? A) "Aztec Creation story" B) "Day of the Butterfly" C) "At the Tourist Centre in boston"** D) "Two Bodies" 2. Which of the following selections are true of ...

### Pre-Calc (Please my class starts in an hour!! :)

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 ...

### MATH

Earth, Jupiter, and Uranus all revolve around the sun. Earth takes 1 yr, Jupiter 12 yr, Saturn 30 yr, and Uranus 84 yr to make a complete revolution. One night, you look at those three distant planets and wonder how many years it will take before they have the same position ...

### Government

What does a city seeking aid often have to do to be eligible for Federal Government grants and loans ? A. It must prove it is not in debt. B. It must provide a master plan for future growth. C. It must choose new city leadership. D. It must become a municipality. A and B sound...

### social studies

what is the greatest challenge facing people in turkey as a result of its diversity? 1. Turks must protect their status as the largest ethnic group 2. Turks must encourage other to follow Turkish traditions 3. Kurds must struggle to keep their cultures alive 4. Kurds must ...

### social studies

what is the greatest challenge facing people in turkey as a result of its diversity? 1. Turks must protect their status as the largest ethnic group 2. Turks must encourage other to follow Turkish traditions 3. Kurds must struggle to keep their cultures alive 4. Kurds must ...

### Physics

Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and Earth's radius is 6.37 ...

### Math

As the earth revolves around the sun, distant objects can be seen from different locations. This idea can be used to measure the distance between earth and nearby stars and is called stellar parallax. To see how this process works, consider the simplified scenario below. A.) A...

### Physics

Which direction (Eastwards or Westwards) in the sky would the Sun appear to move as seen by a stationary observer on the surface of the hypothetical planet that has a sidereal rotation (on its axis) period of 120 days, and a revolution (around the Sun) period of 40 days, where...

### science

The Paleozoic Era is noted for which two changes? a) rocks were formed b) the earth heated up c) people appeared on earth d) mountains were formed Just need to know if my answer or right or wrong. Thanks! :) d

### Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

### chem

The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?

### earth

how long would it take a radio wave with a frequency of 4.3 X10 to the 5th power Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00 x 10 to the 7th power km?

### math 15

find the minimum height above the surface of the earth so that the pilot at point a can see an object on the horizon at c 125 miles away. assume the diameter of the earth to be 8000 miles.

### Maths

If a plane travels halfway round the world at an altitude of 11300m, what extra distance in km, will it fly compared with the distance measured at the surface of the Earth? The radius of the earth is approximately 6400km

### Geology

The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

### English

Can you pleae tell me which alternatives are possible? Thank you very much. 1, They believed a person (better: the individual) should be free from external rules. 2.The Romanics exalted the individual as the centre of life and art.This led to the view of society as an evil and...

### Astronomy

If the elipse were a planet's orbit where would the sun be on the page?

### Food

How did the Wrigley company come up with the name of orbit gum??

### SCIENCE

WHAT IS THE TRUE SHAPE OF HE MOON? ANSWER:ORBIT IS THAT CORRECT

### Physics

Please help The year is 2115. There is a high jump competition on planet Mars. An athlete of mass 72 kg who has been clearing a height of 2.44 m on Earth just the week before is competing here. What is the height this athlete can expect to clear in this competition? Relevant ...

### phys

Find the acceleration due to gravity on a planet whose mass is four times the mass of Earth and whose radius is half the radius of Earth (g is the acceleration due to gravity on Earth).

### English

Thank you very much for your corrections! Here are other statements on the same newspaper article. 1) The cheetah reintroduction programme is kicking off (starting?) with a meeting of experts in September. 2) The project includes the foundation of a breeding site in which ...

### Astronomy

Imagine that Earth did not turn on its axis. (a) What would be true about the ecliptic? It would now define the day rather than the year. It would still be defined and could be seen from all points on Earth, but only when they faced the sun. It would still be defined, but only...

### physics

Superman throws a boulder of weight 1850N at an adversary on the surface of the earth, where the magnitude of the acceleration due to gravity, g = 9.80m/s2 . What horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 11.6m/s2 ?

### Physics

Find the orbital velocity of a satellite orbiting 1800km above sea level in meters per second?

### physics

A satellite orbits at an average altitude of h = 441 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 1024 kg.

### Econ

If a pure monopolist can price discriminate by separating buyers into two or more groups: A.the marginal revenue curve and the total revenue curve will now coincide. B.the marginal revenue curve will now shift to a position above the demand curve. C.the firm will face multiple...

### physics problem!!

If the water molecules in 5.70 g of water (H2O) were distributed uniformly over the surface of the Earth, how many such molecules would there be on 1.40 cm2 of the Earth's surface? -Molar mass Hydrogen gas(H2)=2.02 g/mol -Molar mass Oxygen gas (O2) = 32.0 g/mol -Radius of ...

### physics

The coil in a generator has 200 windings and a cross-sectional area of 0.0100 m^2. If the coil turns at a constant rotational speed and the magnetic field in the generator is that of Earth (B = 0.500 × 10^-4 T), how many 360 rotations must the coil complete each second to ...

### physics

A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height, hitting the ground with a...

### Physics

The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus. Express your answer in g's (i.e. as a ratio to our acceleration of gravity). 9.01×10-1 is the correct ratio Calculate ...

### physics

How fast would the Earth have to spin to have the person at 24.1° northern geographical latitude float apparently weightlessly across the room? Use REarth = 6,375 km for the radius of Earth. Thanks

### College Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

### overland high school

the gravitional force exerted on objects on the moon is about 1/6 that of earth. if an object weighs 240 newtons on the moon, on earth it would weigh _________.show work

### Earth/Space Science

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

### Science

A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

### physics

An airplane is flying above the Earth's surface at a height of 10.5 km. The centripetal acceleration of the plane is 16.4 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.

### physics

An airplane is flying above the Earth's surface at a height of 9.30 km. The centripetal acceleration of the plane is 18.2 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.

### 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.

### earth

If the distance from the moon to the Earth increased from 230,000 (which it is today) to 2,000,000 miles, what affect would this have on the tides?

### Physics

Gravity on the surface of the moon is only 1 as strong as gravity on the Earth. 6 What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s2 . Answer in units of N.

### Earth science

1. Which of the following is not a natural cause of climatic change? A. Earth's tilt B. Solar activity C. Human activity D. Volcanic activity I think it is C

### Science

suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's

### science

5. Suppose a skydiver (mass = 75 kg) is falling toward the Earth. When the skydiver is 100 m above the Earth he is moving at 60 m/s. At this point calculate the skydiver’s…….

### physics

gravity on the surface of the moon is only 1/6 as strong as gravity on earth. what is the weight of a 37 kg object on the earth? The acceleration of gravity is 10m/s answer in units of N

### Physics

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 33 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

### physics

A rocket consists of a payload of 4280.0 kg and 1.626 105 · of fuel. Assume that the rocket starts from rest in outer space, accelerates to its final velocity, and then begins its trip. What is the speed at which the propellant must be expelled to make the trip from the Earth...

### physics

what is the apparent angle the diameterof the moon subtends as seen from the earth in radians. average moon earth distance3.84*10e8 radius of the moon 1.74*10e6

### College Physics

Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 14 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

### Physics

At 6400 km above the earth’s surface, an object weighing 71 N on the surface would weigh only 18 N. Acceleration due to gravity will be about ¼ that on the surface of the earth.

### principles of physics

Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).

### math

Earth's mass, in kilograms, is 5.97x10^24. the moon's mass is 7.34x10^22. How many times greater is Earth's mass (in scientific notation)?

### Physics

Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 24 kg object on the Earth? The acceleration of gravity is 10m/s2 .

### Physics

A particle is projected from the surface of Earth with a speed equal to 2.4 times the escape speed. When it is very far from Earth, what is its speed? ?km/s

### Physics

An elevator is lifted up by a thick steel cable. While the elevator is moving upwards with a decreasing velocity, a. the upward force on the elevator by the cable is greater than the downward force of the Earth b. the amount of upward force due to the cable is equal to the ...

### Science

A hurricane becomes more powerful be evaporating water from? lakes mountains oceans*** rivers 1. Over time, scientists have changed their model of our solar system. It has transitioned from A) a sun-centered to an moon-centered model. B) a sun-centered to an earth-centered ...

### Physics

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

### physics

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

### Physics

The radius of the planet venus is nearly the same of that of the eart but it's mass is only 80% that of the earth. If an object weighs We on the earth (a) what does it weigh on venus (b) calculate the value of g in venus

### Physics

I have no idea how to do this problem At what distance from the Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces? there\'s no data in the question to use

### Physics

In the rough approximation that the density of the Earth is uniform throughout its interior, the gravitational field strength (force per unit mass) inside the Earth at a distance r from the center is gr/R, where R is the radius of the Earth. (In actual fact, the outer layers ...

### science

Explain why there is only one planet in each orbit around the sun?

### science

How does gravity keep a planet moving in an orbit around the sun?

### science

Is Saturn's orbit more elliptical and it's tilt larger than Jupiter's?

### math

what is the diameter orbit and planet mass of hydra the moon of pluto.

### science

what is the diameter orbit and planet mass of hydra the moon of pluto.

### physics

A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to gravity at the surface ...

### Physics

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the mass of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s

### science

Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 15 kg object on the Earth? The acceleration of gravity is 10 m/s 2

### physics

Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).

### Astronomy

A cinder block can be weightless in space. Would you want to kick it with your bare foot? Even If it is weightless, does it have mass? An astronaut, circling the earth in the Space Shuttle, senses that his apparent weight is zero. He cannot feel the normal earthbound sensation...

### PHYSICS

Consider a spaceship located on the Earth-Moon center line (i.e. a line that intersects the centers of both bodies) such that, at that point, the tugs on the spaceship from each celestial body exactly cancel, leaving the craft literally weightless. Take the distance between ...

### physics

show that the weight of an object on moon is one-sixth of its weight on the earth given mass of earth=5.98*10power24kg, radius of earth=6.37*10power6m. given mass of moon=7.36*10power22kg, radius of moon=1.74*10power6m.

### drbob222,math

I've written back for the one i'm having trouble with of the previous in the previous message. Another question is that I want to verify doesn't this problem refer to solving. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S ...

### Science

Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and the part that faces ...

### Physics- drwls please help

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

### Space Exploration

List three subsystems of a SARSAT satellite and tell what the function of eCh subsystem is. Please help I can't seem to find them.

### english

:Select the correct excerpt. Which excerpt from Robert Stawell Ball's Great Astronomers is best supported by this diagram? The diagram show the earth in the middle the sun circling it then the moon circling earth but farther away with mars circling the moon Excerpt 1 These ...

### physics

"The actual value of computed g, assuming no drag, also varies somewhat over the earth's surface due to the earth's spin (which causes a latitude-dependent centrifugal force to get subtracted), lack of a perfect spherical shape of the earth, and the proximity of very high ...

### ASTRONOMY

Good evening all, I am working on a PowerPoint presentation for my Astronomy class about planet Earth - my question is: What is Earth's brightest apparent magnitude (if it has one)? I have searched every reliable source I know of (and that I come across), but I cannot seem to ...

### physics please help!!

A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.90 106 m/s. Relative to the center, the tangential speed is vT = 3.00 105 m/s for locations A and B, ...

### science

Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

### science

Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

### 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 no where in my ...

### Math

There are four people that want to cross a bridge. Sam can cross in 1 minute, Joe can cross in 2, Jack can cross in 5, and Steve can cross in 10. They have one flashlight, and two can cross at a time, but they must go at the same pace. So if Steve and Sam cross together, they ...

### Physics

Consider points on the Earth's surface as sketched in the figure below. Because of the Earth's rotation, these points undergo uniform circular motion. Compute the centripetal acceleration at the following points.

### physics

An astronaut on the surface of Mars fires a cannon to launch an experiment package, which leaves the barrel moving horizontally. Assume that the free-fall acceleration on Mars is three eighths that on the Earth.(a) What must be the muzzle speed of the package so that it ...

### FRENCH

Sra, thanks so much for the help yesterday with my French. Here is the work, and I got my teacher to check it over, and she corrected some areas, so I thought to let you know. 1. Nous sommes allés à Vancouver où nous avons rencontré nos cousins. 2. À Vancouver nous sommes...

### science

Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth around the Sun - ...

### Physics

Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which...

### math

Aaron own a shipping company. He plans to move into his new office which is near to the city centre. He needs some filing cabinets to organize his files. Cabinet x which costs RM100 per unit, requires 0.6 square meters of the floor space and can hold 0.8 cubic meters of files...

### math

Aaron own a shipping company. He plans to move into his new office which is near to the city centre. He needs some filing cabinets to organize his files. Cabinet x which costs RM100 per unit, requires 0.6 square meters of the floor space and can hold 0.8 cubic meters of files...