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

25,143 results, page 41

### 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 gravitational force changing at ...

### 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 follows this equation: w=cr...

### 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) should it make to ...

### math

Tina solved for the decimal value 0f (3/5*18) and got an answer of 5.4. Four of her classmates argued that her answer was not reasonable. Which of the following statements best explain why that value can not =5.4 A. the number 18 is a multiple of 3 , so the answer must be a ...

### 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.

### 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

### math

The radius of the earth is approximately 3950 miles. The radius of Jupiter is approximately 44,400 miles. Since the radius of Jupiter is more than 11 times that of the earth, which comes closest to the volume of Jupiter ?

### 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 mass of the object ...

### volume,mass,weight

if you travelled to a planet that had twice the force of gravity of earth and you have taken a small mass that is 1kg what is the mass weight and volume of the 1kg object on the new planet compared to earth

### math

The ocean covers about 71% of the Earth’s surface. If the total surface area of the Earth is about 510 million square kilometers, how many square kilometers are covered by the ocean?

### physics

Calculate the distance between the center of the earth and the center of the moon at which the gravitational force exerted by the earth on an object is equal in magnitude to the force exerted by the moon on the object.

### Introductory algebra

For homework I must use the numbers 1,2,3,4,5,6,7,8,and 9 in that order with any of the 4 operations (+,-,*,/) and the problem must equal 100. I cannot figure it out and it is due tommorow!!!! Please help!!!

### English

1. You must have walked long, musn't you? 2. Tom must gets up early, mustn't he? 3. Ann seldom goes to the movies, does she? (Are they all grammatical?)

### Math

A seat to a musical costs $5.50. To that amount must be added a 6% entertainment tax. How much money must you receive in total to give a customer a ticket?

### A Peculiar Question

Must I double-spaced when I am merely typing answers to questions found, or located, in my textbook? Also, must I replicate a particular format?

### science

A hypothesis _____. must be tested is supported by large amounts of data is accepted by the scientific community must be proven true for an experiment to be worthwhile

### College physics

How much work (kJ) must a car produce to drive 239 miles if an average force of 369 N must be maintained to overcome friction?

### phys

An astronaut drops an object from rest (relative to the planet) on a planet alpha (having the same radius as of earth) from an altitude of one radius above the surface. When the object hits the surface its speed is 3.98 times what it would be if the same experiment were ...

### English

1. I don't have a little money. 2. I don't have little money. 3. I don't have some money. 4. I don't have any money. 5. I have a lot of money. (Are all grammatical? Does # 1 mean #5?) 6. Do you have much money? - Not much. (Is the answer correct?) 7. He has too much money in ...

### Science Urgent😖😖😖

Why most organisms reproduce A( organisms must reproduce to maintain genetic similarity in the species B( organisms must reproduce to continue to build genetic diverse city into the species C( organisms must reproduce to continue the species D( organisms must reproduce to ...

### English Grammar check

Hi. I wrote a reflective piece from an observational placement in clinic and I was wondering could anyone have a read through it and tell me where the punctuation may be wrong or if some parts just don't sound right. Thanks During my first year of studying Podiatry, I ...

### physics

Two stars are 3.80 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.19 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that diffraction effects...

### physics

Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume that diffraction ...

### physics

Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that diffraction effects...

### Physics

The acceleration due to gravity on a planet other than the earth has a magnitude of 1.50 m/s2. As in examples 6, 7 and 8, a placekicker kicks a football with an initial speed of 20.3 m/s at an angle of 39.4 ° above horizontal. Assume that the ball is kicked on this other ...

### algerbra 1

Antartica comprises about 10.5% of the total land area on earth. antartica has a surface area of about 5,400,000 square miles. what is the total land area on earth? write an equation and slove.

### earth

A man stands at the north pole, his mass is 100 kg. Later he goes and stands at the equator. Compute what force he exerts on the earth when he stands at the: a) north pole, b) equator. Which force is greater and find the difference.

### 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 12. Thank you.

### Math Grade 12

So the question is basically asking which mountains peaks can be seen from Oahu. Island Distance(Mi) Mountain Height(ft) Lanai - 65 - Lanaihale - 3,370 Maui - 110 - Haleakala - 10,023 Hawaii - 190 - Mauna Kea - 13,796 Molokai - 40 - Kamakou - 4,961 A) Radius of earth= 3960 mi...

### 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 C is a constant, and...

### Science Ms. Sue?

Why did the following change occur? The snow that covered the ground all winter began to melt, temperatures rose, and flowers started to bloom. A. days became shorter B. the Earth tilted away from the sun C. the sun's rays became more concentrated D. Earth completed one ...

### physics

At the surface of Mars, the acceleration due to gravity is 3.72 m/s^2. A watermelon has a mass of 4.5 kg here on Earth. a) What is its weight here on earth? b) What is its mass in Mars? c)What is its weight in Mars?

### 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?

### 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

### 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?

### Physics- Final exam review

A proton with kinetic energy 100 keV is moving in a plane perpindicular to a uniform magnetic field of magnitude 2.3 T. Find the radius of its orbit. Not sure what equation to use or how to solve

### physics

There is a 1500 mile race course. I MUST have a top speed of 36 meters/s (meaning I cannot go over 36). The max foward acceleration is 4 m/s squared and the max backward acceleration is 6 m/s squared. I start at 600m and must go to the 800m mark (I must travel 200m). What is ...

### Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at the equator. My ...

### Check my answers?

A. 75 % B. 12.5% C. 25% D. 3.13% E. 9.38% 3. what percentage of land on the earths surface is inhospital lands? - B 4. what percentage of earths surface is covered by land? - C 5. what percentage of land on earth is usable, for living on, but not for agriculture/farming?-D 6. ...

### Algebra

Today Star Satellite is offering the following special package to new customers: a one-time set-up fee of $10, the first month for free, and $32 per month thereafter. Which equation best represents k, the total cost of service for m months? A k = (10 + m)32. B k = 10 + 32m. C ...

### Math

Can you help me solve this problem? Cuz i cant seem to figure it out. An orbiting satellite traveled 3,225 miles in 40 minutes. Find its speed in miles per hour. (Round your answer to the next whole number.) (a)103 (b)4,838 (c)4,267 (d)6,200 (e)150

### Physics repost

I apologise for reposting this question but it is still not working out for me. I know that: speed of light c=3.0x10^8 Time interval delta t=0.19x10^-9s The relationship between actual time and roudtrip distance is d=ct Also if there is and uncertainty of delta time, then it ...

### Physics

Any help is appreciated! A grandfather clock is based on the period of oscillation of a pendulum. The clock keeps perfect time on the first floor of the Sears tower but when carefully moved to the top floor h=436 m above the surface of the earth, the clock is found to be slow...

### math

A manufacturing company needs to construct a rectangular container that meets some customer constraints. The volume must be 242 cubic centimeters. Length must be 3 centimeters longer than the width and the height must be one-seventh the width. What should the dimensions of the...

### 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 with respect to the ...

### 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 gravitational constant to ...

### English

1. He will must go to Japan. (X) 2. He will have to go to Japan. 3. She will may go to the amusement park.(X) 4. She will be allowed to go to the amusement park. 5. He must can speak Chinese.(X) 6. He must be able to speak Chinese. 7. He may must parctice speaking German.(X) 8...

### English

I am writing an essay on "No Exit" by Jean-Paul Satre. The question is: How does the author's manupulation of time contribute to the effectiveness of the work as a whole. Do not just merly summerise the plot. I know that time in Hell is suspended/ halted. HOW is time ...

### Conversions!

1. The price of gold is 200 dollars/oz. How much did 1 g of gold cost that day? (1 oz = 28.4 g)Use dimensional analysis. 2. How many minutes does it take light from the sun to reach Earth? (Distance from sun to Earth is 93 million mi, speed of light= 3 x 10^8 m/s) Use ...

### biology

What regulary hit the earth for the first 600 million years of existence? What do scientists call this period of time? - Aseroids, and meteors hit the earth.What do scientists called this period of time ? I need help answer this question please. If the first question is right ?

### AP Physics

An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?

### PHYSICS

assume you have a mass of 100 kg on earth. on the moon, where the gravitation of the moon is 1/6 gravitation of the earth, what is your mass on the moon and what is your weight on the moon

### 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?

### 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?

### Science

Does the Earth and moon have large molten core or only 1 of them does? I think the Earth only has large molten core

### 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

### chemistry

Calculate the mass percent of methanol, ethanol, and MTBE (answers must be received in that order) that must be present in gasoline to yield a mixture of 1.3 % oxygen by weight.

### physics

On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25 m/s at an angle of 28° above the horizontal...

### 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 this problem. May ...

### Math

Kim is researching the number of channels available from different cable and satellite companies what would be an appropriate graph to use : A. Line plot B. line graph C.bar graph D.frequency table E. pictograph PLEASE HELP!!!!

### English

What can we do to make turtles live in the sea again(Because of water pollution, turtles want to leave.)? 1. We can clean up the sea. 2. We can pick up the garbage in the sea. 3. We must not throw garbage into the sea anymore. 4. Factories must not throw waste oil into the sea...

### Physics

A tennis ball on Mars, where the acceleration due to gravity is 0.379 of a and air resistance is negligible, is hit directly upward and returns to the same level 9.50 later. How fast was it moving just after being hit? The formula is the same as we use on earth, but the ...

### 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.

### Physics please help!!

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 ?

### 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)

### Physics

Planet X has six times the diameter and seven times the mass of the earth. What is the ratio gX : ge of gravitational acceleration at the surface of planet X to the gravitational acceleration at the surface of the Earth?

### physics

A pendulum clock that works perfectly on Earth is taken to the Moon. (a)Does it run fast or slow there? (b) if the clock is started at 12:00:00 am, what will it read after one Earth day(24hrs)? Assume that the free-fall acceleration on the Moon is 1.63 m/s^2 I tried to do this...

### physics

A 4.9 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 29 m above the marble's position on the compressed spring. (a) What is the change in the gravitational potential energy of the marble-...

### 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

### Physics

The equation describing the (r, \theta ) coordinates of points along a single field line of a magnetic dipole is r=R_0 \sin ^2(\theta ) where \theta =0 is in the direction of the dipole moment and R_0 is a constant which is different for each field line. The question requires ...

### 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 earth.** C. An ...

### physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 1.97 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.72 × 10−11 m. Answer in units of N.

### physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 1.97 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.72 × 10−11 m. Answer in units of N.

### physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 1.97 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.72 × 10−11 m. Answer in units of N.

### physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 1.97 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.72 × 10−11 m. Answer in units of N.

### Physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.1 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.51 × 10−11 m. Answer in units of N

### Physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.45 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 5.18 × 10−11 m. Answer in units of N

### Physics

Astrotrain, a Decepicon triple changer, is traveling at a speed of .77c towards Earth, as seen by Blaster, who is on Earth inside Fortress Maximus. Astrotrain's computers tell him the icon rocket was fired at .35c. Determine the length of the ion rocket as seen by Blaster and ...

### Science

Which of the following statements is true about Earth's magnetic poles? A.They are located at earths geographic poles B.They are the areas where Earths magnetic field is weakest. C. They are the areas where Earths magneic field is strongest. D. Earth has one dominant magnetic ...

### English

Read the following paragraph from "Five Hours to Simla." After the cacophony of screeching brakes and grinding gears, there followed the comparatively static hum of engines, and drivers waited in exasperation for the next lurch forwards. For the moment there was a lull, ...

### Physics

A spaceship lifts off from the Earth with constant acceleration. 9 seconds into the flight, a small piece of the ship breaks off and falls back to the Earth. If the piece hit the ground 11.5 seconds after breaking off from the spaceship, what is the spaceship’s acceleration...

### Physics

Having trouble on the question below. Would you do need to convert the km to meters and then multiply (4700*9.8*165500)? The first woman in space, cosmonaut Valentina Tereshkova, flew in 1963. She orbited the earth 48 times during her 70 hour 50 minute flight at an average ...

### 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 rollerblading, she wil lfall ...

### Math

Today Star Satellite is offering the following special package to new customers: a one-time set-up fee of $10, the first month for free, and $32 per month thereafter. Which equation best represents k, the total cost of service for m months? A k = (10 + m)32. B k = 10 + 32m. C ...

### 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.

### Physics

On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.3 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 40 m/s at an angle of 46° above the ...

### math

A year on Mars is 686 Earth Days. (1) Whicch is longer, a year on Mars or a year on Earth. (2) By how many weeks is it longer? Please explain how you got the answer. My answer was 82 1/2 weeks longers

### Health

Writeacher, could you please check if these statements on school rules (and the alternatives) in brackets are possible. Thank you 1) You must have your report card every time (correction: always with you) You must wear your tracksuit if you have PE. 2) You must park your ...

### philosophy 208

According to the video “Religion, War, and Violence,” Just War Theory asserts that military intervention (Points : 1) can be seen as an act of altruism must always have an altruistic component must be primarily an act of altruism must never have an altruistic component

### ENGLISH Types of business writing

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended by ...

### physic

Find the force a 67.5 kg man would experience while standing in the surface of each of the following planets PLANET 1. EARTH 2. MARS 3. PLUTO Mass for earth 5.98 x 10^24 kg for mars 6.34 x 10 ^23 kg for pluto 5 x 10^23 kg distance distance for planet 6.337 x 10^6 m distance ...

### english 4

In “The Rocking-Horse Winner,” what does Paul keep hearing the house whisper? A. “Your mother does not love you!” B. “There must be more money!” C. “You must leave while you can!” D. “Your luck will change!”

### Science

Describe Earth's rotation in terms of its axis and length of time to rotate. The earth's axis slowly changes in the way it points. It changes direction over time. One effect of this precession, is the changing position of the North Celestial Pole. It takes 26 000 years to ...

### English

So what i have to do is get two articles that are local news and they must come from July and August. It must be approximately be 1000 words and must come from a major newspaper or news magazine. So i have been searching up in the new york times but you have to pay for it and ...

### math

Please check my math answers (and correct?)? I have some math questions, please check them, (they are multi choice, check if my answer is correct. if not, please say which is correct) 1. What is the simplified form of the expression –(10)–1? a -1/10 b -1/-1^10 (my answer) ...

### Physics-mechanics

Find the speed and period of a satellite that orbits Mars 175 km above it's surface. (The average radius of Mars is 3.40 x 10^6; and it's mass is 6.42 x 10^23. Use all necessary formulas and show all clear-working, to enable me understand how you arrived at your answer.

### Physics-mechanics

Find the speed and period of a satellite that orbits Mars 175 km above it's surface. (The average radius of Mars is 3.40 x 10^6; and it's mass is 6.42 x 10^23. Use all necessary formulas and show all clear-working, to enable me understand how you arrived at your answer.

### science

Hi...I am having trouble on one last science question. Which statement supports the fact that Earth rotates about its axis from West to East? a. only one face of the moon is visible from earth b. the moon's phases change every day over the course of 29 days c. the moon changes...

### gr 12 physics

A person standing at the edge of the water and looking out at the ocean/ The height of the person's eyes above water is h=1.6m. and radius of the earth is R=6.38x10^6m How far is it to the horizon. In other words, what is the distance d from the person's eyes to the horizon? ...