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

25,143 results, page 99

astronomy

how far away is the sun in science notation? The distance of the earth from the sun varies from 9.1407905x10^7 miles to 9.4512780x10^7 miles with a mean distance of 9.2960242x10^7 miles. Many use 9.30x10^7 as the mean distance.

french

I have to write a paragraph in french about who i am where i live and what pets i have,my name is Harry White I am 12 years old I live in Buckingham and have 2 dogs 5 cats how on earth do I write that in french

Physics

A man observes snow falling vertically when he is at rest, but when he runs through the falling snow at a speed of 4.70 m/s, it appears to be falling at an angle of 24.0° relative to the vertical. Find the speed of the snow relative to the earth.

accounting

Can anyone help me with this? Guard Dog Company recently changed its system of internal control over cash disbursements. The system includes the following features. Instead of being unnumbered and manually prepared, all checks must now be prenumbered and written by using the ...

accounting

Guard Dog Company recently changed its system of internal control over cash disbursements. The system includes the following features. Instead of being unnumbered and manually prepared, all checks must now be prenumbered and written by using the new checkwriter purchased by ...

Physical Sci

The Dyson sphere is an hypothetical spherical structure centered around a star. Inspired by a science fiction story, physicist Freeman Dyson described such a structure for the first time in a scientific paper in 1959. His basic idea consisted of an artificial spherical ...

Physics

A 3.79 kg ball is dropped from the roof of a building 163.8 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 11.5 N on the ball. It takes 5.77 second to hit the ground. How far from the building does the ball hit the ground? Answer in ...

physic

The star nearest to our solar system is said to be 3.8 ly away. How many km. away is this if a spaceship can travel at the speed 100 times that sound , how long armed it take that spaceship to travel from the earth to the nearest star. Express your answer in meaningful term.

Physics

The earth has a radius of 6.38 106 m and turns on its axis once every 23.9 h. A. What is the tangential speed (in m/s) of a person living in Ecuador, a country that lies on the equator? (b) At what latitude (i.e., the angle θ in the drawing) is the tangential speed two-...

Response to DWRLS

I am still on this weight and elevation question. w=Cr^2 for r= r= quare root c/w Suppose that an object is 100 pounds at sea level. find the vlaue of C tat makes sense. Sea level is 3963 miles from the center of the earth. Wouldn't this be 100=C/(3963)^2 C=(3963)^2x100?

Algebra

The half-life of a specific radioactive compound is 20 years. The equation used to model this half-life is y = 5 1/2(t/20) where t represents time. Currently, there are 5 pounds of this compound 15 feet below the earth's surface. When will there only be 4 pounds of this ...

Science

Earth’s energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then describe the ideal energy source for generating most of your home’s electricity, and explain why you chose that source. I ...

Physics

Overall 80 % of the energy used by the body must be eliminated as excess thermal energy and needs to be dissipated. The mechanisms of elimination are radiation, evaporation of sweat (2430 kJ/kg), evaporation from the lungs (38 kJ/h), conduction, and convection. A person ...

Technology

I need help with these two questions: 1. Sheet metal and copper piping are examples of a. natural resources b. industrial products c. consumer products d. standard materials I think it's either B or D 2. Which of the following would be considered part of a primary processing ...

language arts

LORD OF THE RINGS STORY which answer choice best describes how the conflict of the story is revealed? A)Bilbo Baggins returns,and everyone lives happily ever after. B)Sauron's defeat leads middle earth to change forever. C)Frodo ecounters danger when he is given a ring. D)...

Physics

GPS can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of the several satellites orbiting Earth. If one of the satellites is at a distance of 20,000 km from you, what percent accuracy in the ...

Social Studies

Experts argue that a significant water shortage by 2025 will be caused by a. rising ocean levels. b. drastic increase in water usage by humans.*** c. drastic increase in usage by a growing animal population. d. raging, out-of-control wildfires that are spreading throughout ...

Earth Science

A layer of sandstone is found on top of a layer of limestone in a geologic cross section. What does this tell you about how the sea level changed in that area? I know how metamorphic rocks are formed but how are metamorphic rocks formed into other metamorphic rocks?

alberbra

The parliament of the land of Archronia consists of two houses. The Parliament was elected in 1995 for a period of four years beginning on Monday, January 1st, 1996, when the two houses had their first sessions. According to the rules, the meetings of the first house must ...

Logic

Even if you know only some of them please help! 1. Give a proof of the following: (∀F)( (P)( [ιxGx][Px] ⊃ F(P) ) ⊃ F(G)) (∃F)( (P)( F(P) ≡ [ιxGx][Px]) Therefore, E!(ιxGx) 2. Prove the following: [ιxMx][Thales believed that Bx...

science lab

I did this lab experiment below and I am stumped this question:given the current warming trend of our planet, over time (generations of parents and offspring) what do you predict will happen to the species of wooly worms? THE WOOLY WORM HUNT is an exciting "game" where the ...

Physics Help

If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational red shift or a gravitational blue shift? and Explain please a)blue shift b)red shift c)no shift

Physics

You recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 1700 W/m2 from it’s companion star. If planet Burt has a a radius of 6500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy it absorbs, what...

English

Please check my answer thanks :) In research , you must document the source of all specific information unless it's common knowledge. I said True

physics

How much work must be done to roll a metal safe, mass 116 kg, a distance of 15.0 m across a level floor? The coeffecient of friction is 0.050.

English

When creating an argument, regardless of type, you must write it to ensure it not just read, but also what? A. Understood B. Utilized C. Heard D. None of the above

MATH

How do you find the value of a variable in a trianlge when it is split into two and only the hypotnuse and one side are given? Geometricmeans must be used.

Compare & Contrast

Essay ideas? It needs to be 800 words. The two things must be similar at face value, but have differences between them. Help?

College Calc I

If f is decreasing and f(20)=10, which of the following must be incorrect? Explain. a. (f^1)'(20)=-3 b. (f^1)'(10)=12 how would i go about figuring this out??? i'm not sure exactly what the concept in question is here.

history

Alfred T. Mahan argued that to protect its trade, the United States must build up its a. army b. navy c. labor unions d. pioneer spirit B?

english

OK im supposed to identify the part of speech of the word in brackets...A city must be planned [carefully], or people will not want to live in it. I think it is an adverb but im not certain.

effective writting

What must one do to convert the annotated biliograph to an APA-formatted reference page as part of a rough draft for a research paper.

literature novel

In The Call of the Wild, what valiant, tragic figure among the dogs must finally be put down for the good of the lives of the team

English

Why do these phrases contain a pronoun case? "Each of the applicants must submit their completed forms to the interviewer." and "My best friend and I are going to Hawaii this summer."

chemistry

How fast must a 56.5 g tennis ball travel in order to have a de-Broglie wavelength that is equal to that of a photon of green light (5400 Angstroms)?

spelling

what is the answer to this analogy? must start with the letters scr, spr, str, or thr. couldn't:wouldn't ; green ????also for fifteen: five: nine ???

Physics

Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

Physics

Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

Biology.. Nutrition (college)

What root was widely traded were the seeds that Lewis and Clark concluded that they must have been indigenous to North America

physics

What force must be exerted to prevent a truck weighing 15 tons from rolling down an inclined plane which makes an angle of 3 degrees with the horizontal.

Physics

How much work must be done to bring three electrons from a great distance apart to within 2.1×10−10 {\rm m} from one another (at the corners of an equilateral triangle)?

Physics

How do you solve this problem? How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of 115,000 g's?

Science

What minimum acceleration must it engines produce if the airoplane has become airbome after starting from rest and travelling a distance of 300m on the runway

ap ch em

004 10.0 points To what temperature must a sample of helium gas be cooled from 144◦C to reduce its volume from 4 L to 0.86 L at constant pressure? Answer in units of K.

Speechwriting

Hey How would I go about doing a PPT, assuming that I'm delivering a speech at a conference on Waltzing Matilda. My teacher said it must not detract from the presentation.

Physics

An advertisment claims that a certain 1200 kg car can accelerate from rest to a speed of 25 m/s in 8.0 s. what average power must the motor supply in order to cause this acceleration?

Finance

Your Firm has an established debt policy of 60 percent for all capital expenditures. What targeted value for the replacement viability ratio must be set?

physics

A football is thrown upward at a(n) 37 angle to the horizontal. The acceleration of gravity is 9.8 m/s2 . To throw a(n) 57.8 m pass, what must be the initial speed of the ball? Answer in units of m/s

Physics!

Suppose that you are standing on a train accelerating at 0.39g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

grammar

Can you check these sentences, please? "I've always loved animals and felt I could communicate with them. To become a veterinarian, I must carefully choose the right school."

alegebra 1

in some states in order to drive you must be at least 16 years old to obtain a driver's lisense. write an inequality to express this situation

chemistry

What mass (in grams) of potassium acetate, KC2H3O2, must be added to 140 mL of 0.010 M acetic acid to form a buffer solution with a pH of 4.5? (Ka (HC2H3O2)= 1.8 x 10-5)

Maths

For ghana lotto if 44-88 play closed in the first and second position respectively what order two number must follow in the next draws.

algebra 2

the printed matter on a 10 by 16 centimeter page of a book must cover 0 square centinmeters. if all margins are to be the sme width, how wide should they be?

chem 101

How much alcohol must be burned to generate 279kj of heat to warm the water as described in problem 3?(from 60 F to 180 F) a. 18.7 g b. 2.9 g c. 1.6 g d. 10.4 g e. 9.3 g the answer is D help with solution?

math

the printed matter on a 18 by 22 centimeter page of a book must cover 96 square centimeters.If all margins are to be the same width, how wide should they be?

Art

Can you please check these two sentences, Writeacher? Thank you. 1) Each answer must be developed in no more than ten lines. 2) Only a monolingual dictionary is allowed.

Research and Writing

I am trying to write an internal memorandum and must analogize two cases first. I cannot get it straight in my head what the process it for making the analogy! HELP!!

Physic

You must show your work for full credit.) Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin):

literature

"There is one correspondent who is a sure draw, Watson. That is the bank. Single ladies must live, and their passbooks are compressed diaries." What does this quote mean?

Reading/language arts

Can someone help me with this. Create 1 sentence with these words KEEN, FURIOUS, AGONY, CRUELTY, MOLES, DWELL. It must make sense.

chemistry

To what temperature, in degree celsius, must 10.0 grams of ammonia gas (NH3) have to be heated in a 15.0 L container in order for it to exert a pressure of 3.50 atm?

physics

A 50.7 kg student climbs a 6.35 m long rope and stops at the top. What must her average speed be in order to match the power output of a 130 W lightbulb

Chemistry eq

How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

Chemistry eq

How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

writing

how can i reword this differently Free will is God’s indispensable gift to humanity, and we must allow ourselves to be open to salvation in light of the choices we make.

Data Management

How many ways can the manager of a baseball team put together a batting order of his nine players, if the shortstop must bat 3rd?

microeconomics

Question 7 of 20 5.0 Points Suppose that the elasticity of demand for a product is 0.5 and quantity demanded increases by 20%. What must the percentage decrease in price have been?

algebra

the printed matter on a 10 by 16 centimeter page of a book must cover 40 square centimeters. if all margins are to be the same width, how wide should they be?

chemistry

What is the minumum acceleration potential (V) that must be applied to a beam of free electrons for diffraction to occur in a crystal of niobium (Nb)? Express your answer in volts.

algebra

how much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $300 from the investment?

social studies

1.why must omar and his brothers work in the mines? A.they cannot attend school B.their mother cannot support them C.they have no other job prospects D.they do not know another trade

Physics!!!

How much work W must be done on a particle with a mass of m to accelerate it from rest to a speed of 0.899c ? Express your answer as a multiple of mc^2 to three significant figures.

Calculus Please Need Urgent :/

Find the most general antiderivative of f(x)=–8e^x–6secant^2(x) where -pi/2<x<pi/2 Note: Any arbitrary constants used must be an upper-case "C". F(x)=?

Math

Charlie is due a refund of $800. If he wants to receive his money 2 months early then he must pay a $50 fee. What is the annual simple interest rate?

Math

Good day please help.Iam struggling with number patterns,i must fid the rule and also give the nextthree numbers in the sequence. 31;30;27,22;15

Math

What is the linear approximation of the square root of 8.9? Must be accurate to the fifth decimal place. I have tried entering 2.98328 but that does not appear to be correct.

Algebra 1

Which expression is the factored equivalent of 3x^2-4x+1? A. (3x-1)(x-1) B. (3x-1)(x+1) C. (3x+1)(x-1) D. (3x+1)(x+1) When I factor it, I keep getting D. But I know the answer is A. So this must be a common mistake students make. What am I doing wrong? Here is my work. 3x^2-4x...

History

Muslims must A. pray eight times a day B. save all their money C. fulfill the five pillars of Islam D. live in Makah PLEASE HELP........

English

How to write an a prepare speech that i argue that African slaughter rituals should be allowed in the surburbs,it must have introduction,body and a conclusion

Math

If an elevation that is cruising at an altitude of 9 km wants to land at NAIA iys must begin its descent so that the angle of depression to the airport is 7 degrees. What is its illustration and the answer

chemistry 1020

You have 67.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?

statistics

find the number of units that must be produced to break even. R(x)=200x - x^2 C(x)= 70x +2200 0 < x < 100 (These < are supposed to b less than or equal to signs)

CHEM 120

What mass of ammonium nitrate must be added to 350 mL OF 0.150 M solution of ammonia to give a buffer having pH of 9.00? (Kb(NH3)= 1.8X10-5

science, Health

RATE of diffusion must be expressed as number of particles moved per unit time. Write this as a word. Can you please teach me this?

math

How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment?

Science

In order to reproduce, flowering plants must do what? A. split into two cells B. release seeds C. regenerate D. mate I think the answer is b.

Physics 1

A football is thrown upward at an 48◦ angle to the horizontal. The acceleration of gravity is 9.8 m/s^2. To throw an 80.4 m pass, what must be the initial speed of the ball? Answer in units of m/s.

Earth Science

A scientific hypothesis can become a theory if? a- the entire scientific community accepts it b- the hypothesis is tested extensively and competing hypothesis are eliminated c- there are no other competing hypothesis d- the hypothesis can be tested at least once My answer is B

earth science

I need to draw a diagram showing delta, oxalate, tributary and meander. I also need to draw a diagram showing water table, zone of saturation, cone of depression, working well, dry well, aquitard, aquifer, spring, perched water

Chemistry

I did a back titration with an unknown carbonate and using the average % carbonate (by mass) which I found to be 27.40% and appropriate calculation decided where the unknown is an alkali metal carbonate or an alkaline earth metal carbonate. I have no idea how to tell the ...

English - Caesar & Antigone

Can you check these questions? 1) Which is an example of verbal irony as spoken by Antigone? a)"You have yourself to consider, after all." b)"You must decide whether you will help me or not." c)". . . and if I must die, / I say that this crime is holy . . ." d)". . . if it ...

physics

A baseball pitcher throws a baseball horizontally at a linear speed of 41.3 m/s. Before being caught, the baseball travels a horizontal distance of 15.4 m and rotates through an angle of 52.7 rad. The baseball has a radius of 3.74 cm and is rotating about an axis as it travels...

7th grade Science

How does the internal structures of earth's density compare to the lithosphere's density? It is a lot greater, a little greater, a lot smaller or a little smaller?

Writing I

Label each sentence below. Use S for simple, CD for compound, CX for complex, and CD-CX for compound-complex. 1. Do you know the theory of black holes? 2. Objects in space have gravitational pull, so smaller objects are attracted to larger object. 3. Throw a rock into the air...

Earth Science

Seismic waves move faster through which of the following media? a.) water b.) steel c.) oxygen d.) oil Please answer my study guide is due Monday and the teacher hasn't gone over this I looked through my notes and everything. It would really help if you answer...Please answer ...

Symbolic Logic

Even if you know only some of them please help! 1. Give a proof of the following: (∀F)( (P)( [ιxGx][Px] ⊃ F(P) ) ⊃ F(G)) (∃F)( (P)( F(P) ≡ [ιxGx][Px]) Therefore, E!(ιxGx) 2. Prove the following: [ιxMx][Thales believed that Bx...

Chemistry

Which of the following is true about oxidation reactions? A. Oxidation reactions are the principal source of energy on Earth. B. All oxidation reactions are accompanied by reduction reactions. C. The burning of wood in a fireplace and the metabolization of food by your body ...

just a ?

Do you think that it is even possible that we could live in a sustainable way at this point? In other words,even if our population growth decreased and each member of society was willing to contribute to sustainable living and protecting the environment, could the earth still ...

PHYSICS

Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...

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