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

25,359 results, page 30

### 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??

### Science-please help

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

### 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?

### science

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

### Algebra 1

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

### 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?

### Science

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

### earth science

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

### 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

### 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

### 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.

### 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 ...

### 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 ...

### 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 ...

### 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 - please help

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 ...

### 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?

### 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.

### 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?

### 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?

### 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.

### 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?

### 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!! :)

### 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?

### 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?

### 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.)

### 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?

### 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?

### physics

Please help! The planet Mercury has a radius of about 0.38 Earth radii and a mass of only 0.055 Earth masses. Estimate g on Mercury

### 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 ...

### 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 ...

### 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.

### 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)

### 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

### 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 ...

### 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

### 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...

### 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...

### Physics

The radius of the Earth is about 6.37 × 106 m. a) What is the centripetal acceleration of a point on the equator due to the rotation of earth about its axis? Answer in units of m/s 2

### 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?

### 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 ...

### 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 ...

### 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

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 ...

### 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?

### 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