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

25,143 results, page 30

### 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...

### 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 ...

### 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

### 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 ...

### 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?

### earth

please write an essay about earth and its environment. please mention a suitable site

### science

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

### earth

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

### Phsyics

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

### Physics

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

### Science

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

### 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?

### earth

if n the diameter of the earth is 19.7Mm , what is in cm

### 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. (...

### 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)...

### 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...

### science

how long is earths orbit and its roatation?

### Science

How does gravity help keep satellites in orbit?

### science

comets orbit the sun in a what pattern

### 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 ...

### 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?

### 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?

### 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?

### 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

### 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

### 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?

### Physics

calculate the escape velocity on the surface of earth, acceleration due to gravity will be 36 percent of its value on the surface of earth .if mean radius is 6400 km?

### Physics

The rate of motion of the earth at its equator is about 1,038 mi/h because of its rotation. From this information, estimate the earth's circumference using an order-of-magnitude estimate.

### physics

a 70 kg block rests on the earth's surface. How much energy is required to move the block very far from the earth, ending up at rest again?

### Science

Suppose the moon rotated on its axis just as quickly as earth. Would you still see the same side of the moon from earth? Please help!

### Science , Earth , Waterce , Earth , Waterce

How can I answer this question? Draw an overall conclusion: how does water compare to other substances? Why do you think so? Please help me...

### English

Can you check these sentences, please? In particular, let me know if the words occurring before the parentheses are OK. 1) Jane Austen disapproves of relationships based only on wealth or on sudden violent passions.According to her, a good marriage should be based on calm ...

### Science

What are 2 processess that change earth slowly? The ___1____, which includes the__2____ and part of the _____3_____, is divided into plates that carry all of the Earth's lands and oceans. These plates float on a ___4____ layer of rock in the upper mantle called the ___5__. THe...

### Physics questoin

A satellite has an orbital radius of 3.74x10^7 m. If it has a period of 49776 seconds, what is the mass of the planet?

### Physics/Dynamics

A truck has wheels of diameter 0.9m, a weight of 8000kg, a wheel-base of 4m, and a tray height of approximately 1.2m. The truck’s weight distribution is 50% on the rear wheels and 50% on the front wheels. The truck’s front springs have a combined stiffness of 550,000 N/m, ...

### maths calculus

A centre enters students for English levels one and two end test every year. Some take the paper based version, others online version. For planning purposes you need to assume trend patterns indicate that .the total number of entries each year is always more than 50 .the ...

### Physics (pressure)

What is the total mass of the earth's atmosphere? The radius of the Earth is 6.37E6 m, and atmospheric pressure at the surface is 1.013E5 N/m^2 (or Pa). I tried this: 1.013E5 Pa = Mg/ pi(6.37E6)^2 1.013E5 Pa (denominator)= 9.8 M solve for M: I'm coming with different ans from ...

### Math

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do not neglect ...

### physics

Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do not neglect ...

### modern physics

Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with respect to Earth? What ...

### modern physics

Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with respect to Earth? What ...

### tax

In order for an employee to deduct home office expenses, which of the following must occur? a. There must be no other fixed business location. b. The taxpayer's most important activities must occur in the home. c. The home office must be for the convenience of his or her ...

### math

Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.

### math

Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.

### space

What is the value of g for space-shuttle territory , about 200km above the Earth's surface. Data: Earth's mass is 6x10^24kg, and radius is 6380 km

### Physics

The average distance separating earth and moon is 384000 km. What is the net gravitational force exerted by earth and moon on a 3.00 * 10^4 kg spaceship located halfway between them.

### physics

Calculate the force needed to accelerate a 1 kg ball by 3 m/s: a. in space along way from the earth. b. on the ground in a direction horizontal to the ground. c. on the earth vertically upward.

### geometry

The radius of the earth is approximately 6371 km.If the international space station (ISS) is orbiting 353 km above the earth, find the distance from the ISS to the horizon(x)

### Physics

The height of the sun from point A is larger than from point B by 4.92 degree.If the distance between A and B is 500 Km, How long is the circumference of the earth? ( assume that earth is perfect sphere)

### earth science

one reason the moon might be a better place than earth to study the universe is there is almost no atmosphere. True or False MY guess is false

### math

Describe the points on the earth’s surface that are visible to a viewer who is 100 miles above the North Pole. Would it be half of the surface area of Earth?

### Physics

The velocity of the Moon relative to the center of the Earth can be approximated by varrowbold(t) = v [−sin (ωt) xhatbold + cos (ωt) yhatbold], where v = 945 m/s and ω = 2.46 multiplied by 10−6 radians/s. (The time required for the Moon to complete ...

### earth science

Traditionally,how have different fields of earth science been studied?

### physics

A pendulum has a period of 0.57 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

### phy

A pendulum has a period of 0.75 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.41 that on Earth?

### PHYSICS

does the sun exert a gravitational force on the earth? if so, why doesn't the earth fall into the sun?

### Math

An ant weighs about 2 x 10^-5 lb. There are about10^15 ants on earth. How many pounds of an ants are on earth?

### physics

could you estimate the mass of the entire earth? How? If we cannot direct measure the earth's mass, how was it determined?

### Physics

A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.31 that on Earth?

### Physics

Calculate the force of gravity on a 2 kg mass at Earth’s surface. The mass of Earth is 6 * 10 ^24 kg, and its raidus is 6.4 * 10 ^ 6.

### physics

Calculate the force of gravity on a 1 kg mass at Earth's surface. The mass of Earth is 6.0×10^24 kg , and its radius is 6.4×10^6 m.

### physics

A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.51 that on Earth?

### physics

an object weighs 3 lb. at 10 earth radii from its center. What is the object's weight on the earth's surface?

### Physics

A pendulum has a period of 4.28 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

### physics

A pendulum has a period of 0.90 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.29 that on Earth?

### scince

Mars=750N the value of g is 38% of that of earth what is the mass of the men on the earth and his weight of mars

### Precalculus

Can someone check my answers please? Thank you :) 30. What is Earth's rotational speed at (a) Bangor, Maine (latitude 45 degrees N) and (b) Rio de Janeiro, Brazil (latitude 23 degrees S)? (It's given in the problem also that Earth's rotational speed at the equator is about 1,...

### science

Scientists believe that Earth's early atmosphere changed in composition as a result of a. the appearance of oxygen-producing organisms b. the drifting of the continents c. the changes in Earth's magnetic field d. a transfer of gases from the Sun

### Physics

How long would it take for the Earth to complete a full turn if a person at 49.2° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth

### physics

How long would it take for the Earth to complete a full turn if a person at 24.1° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,375 km for the radius of Earth. Thank you

### physics

A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth?

### physics

How long would it take for the Earth to complete a full turn if a person at 56.4° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth.

### math

How long would it take for the Earth to complete a full turn if a person at 43.8° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,390 km for the radius of Earth.

### physics

How long would it take for the Earth to complete a full turn if a person at 49.2° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth

### Physics

How long would it take for the Earth to complete a full turn if a person at 49.6° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,384 km for the radius of Earth.

### Physics

How long would it take for the Earth to complete a full turn if a person at 32.6° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,384 km for the radius of Earth.

### physics

You stand on the seat of a chair and then hop off. During the time you are in flight down to the floor, the Earth is lurching up toward you with an acceleration a. If your mass is 52 kg, what is the value of a? Visualize the Earth as a perfectly solid object.

### Earth Science

Computer models of Earth's climate project increases in the average temperature from 2°C to 6°C by the end of the century. Have these high temperatures ever occurred before in the past 400 000 years?

### college algebra

The diameter of the Earth is approximately 7,920 miles. Given that the circumference of a circle is pi times its diameter, which statement best describes the length of a trip from Washington to Masdagascar that is approximately 8,600 miles long? a.One fourth of the ...

### physics

An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity? Select one of the options below as your answer: A. a force equal to its weight on Earth B. a force equal to zero C. a force equal to ...

### Physics

Suppose that the magnetic field o fthe Earth were due to a single current moving in a circle of radius 2988 km through the earth’s molten core. The strength of the Earth’s magnetic field on the surface near a magnetic pole is about 6.00E-5 T. About how large a current ...

### physics

The earth spins on its axis once a day and orbits the sun once a year (365 1/4 days). Determine the average angular velocity (in rad/s) of the earth as it (a) spins on its axis and (b) orbits the sun. In each case, take the positive direction for the angular displacement to be...

### MATH 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 ...

### English

1. The earth moves round the sun. 2. The Earth moves round the sun. 3. Earth moves round the sun. 4. The earth moves round the Sun. [Which ones are okay? Do we have to use 'the' in #2 or #3? What about #4? "the Sun?"]

### physics

CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8 m/s2 near the surface ...

### physics

CRITICAL THINKING: The term ”weight” in physics has the following very specific meaning: “The weight of an object is the name given to a particular force: the gravitational force exerted by the earth on the object, giving it an acceleration of 9.8 m/s2 near the surface ...

### physics

magine a straight line connecting the centers of the earth and the moon. At some point along this line the gravitational forces pulling a spacecraft towards the moon and towards the earth exactly balance each other, and the craft could just sit there in (an unstable) ...

### engineering

In many engineering uses, the value of �g�, the acceleration due to gravity, is taken as a constant. However, g is actually dependent upon the distance from the center of the Earth. A more accurate expression for g is: g=g0(Re/Re+A)^2 Here, g0 is the acceleration...

### physic

1 A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both ...

### phy

A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both ...

### physics

passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both observers ...

### physics

1 A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both ...

### Physics

The earth spins on its axis once a day and orbits the sun once a year (365 1/2 days). Determine the average angular velocity (in rad/s) of the earth as it (a)spins on its axis and (b) orbits the sun. In each case, take the positive direction for the angular displacement to be ...

### Physics

It has been suggested that cylinders rotating about their long axis with dimensions 19 km long and 6.9 km in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall ...

### science

Why is the earth round? Why is the water blue? Why doesn't the water fall off the earth? the earth is not perfectly round, water is blue because particles reflect blue light. The water cycle, type that in and google it to find out for yourself. I'd give u the link to the site ...

### earth

A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?

### space

gowing 10,00 miles per hour how long will it take to get to jupiter from earth with earth the sun and jupiter alined like a straight line or just an estimation

### physics

I need help finding an equation for: an asteroid revolves around the sun with a mean orbital radius twice that of Earth's. Predict the period of the asteroid in Earth years. Thank you.

### Physics

Calculate the force on an electron (qe = -1.6 x 10-19 C) in each of the following situations: a.) moving at 2.0% the speed of light and perpendicular to a 3.0 T magnetic field b.) 3.0 x 10-6 m from a proton c.) in Earth's gravitational field at the surface of Earth