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

25,359 results, page 63

### world geography

the word aborigine comes from the latin ab orgine and means: A)"the people" B)**"from the beginning" c)"out of the earth" D)"to the end"

### Earth Science

Where a major earthquake has happened in the past, but not in a while, is called a seismic? a)gap b)wave c)fault d)scale

### Science

Deep within the earth, the process of mantle___?___drives plate tectonics A)convection B)subduction C)currents D)condensation

### Earth Science

Plinian eruptions are the most powerful type of eruption. They are usually caused_______magma. A)rhyolitic B)bybasaltic C)andesitic

### Exploring Space

Why do astronauts appear to float when they aboard the ISS station and experience 90% of earth's gravitational pull? Is it because of the freefall?

### earth science

if continental crust were thinner than its average thickness of 40 km, would it depress the mantle more or less than it does now?

### college

Find the minimum initial speed of a projectile in order for it to reach a height of 2039 km above the surface of the earth.

### science

Let's say Glenn's trip around the earth took about 5 hours. that is how many times as long as Shepard's flight?

### science

A falling star is really a ______burning up in the atmosphere of the earth. Just need to know if my answer or right or wrong. Thanks! :) meteor

### science

The deepest layers of the earth is called the inner______. Just need to know if my answer or right or wrong. Thanks! :) Inner core.

### science

A falling star is really a ______burning up in the atmosphere of the earth. Just need to know if my answer or right or wrong. Thanks! :) meteor

### science

At the beginning of the____Era, the earth had no crust. Just need to know if my answer or right or wrong. Thanks! :) modern era

### earth science

how did cultures throughout history attempt to explain events such as volcano eruptions, earthquakes, and ecipses?

### physics

If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? Answer in m/s.

### physics

If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? answer in m/s.

### earth space science

A substance that cannot be broken down into simpler substances by physical or chemical needs is called an

### Science question

How do oceans redistribute energy around the earth? Isn't this due to evaporation? Or.. the Coriolos effect? Could someone help me? Thanks -Allyson

### science

Which planet by itself contains the majority of mass of all the planets? saturn jupiter uranus venus earth

### grade nine space

What is the difference between the terms rotation and revolution? I need to use the Earth to support my answer.

### Science

I need help answering with the below question please What are three ways resources are brought up from under Earth's Surface? Thanks!

### Physics 203

An object is projected upward from the surface of the Earth with an initial speed of 4.6 km/s. Find the maximum height it reaches.

### earth science

how do we calculate or determine the distance to stars? what units do we use and what are the limitations (if any) of the method used for such calculations?

### Natural science

What might happen to earth if the temperature in the atmosphere rises by 5degrees and if the water in the ocean gets colder?

### chemistry

A mole of 1 gallon cans of paint could cover every square inch of the surface of how many planets the size of the earth?

### science

until recently, many scientists were tentative in their acceptance for the theory of the chemical evolution of life on earth. what has changed their minds?

### Math

Make a picture of: a model of the earth, a stop sign, a dinner plate and a clock. Which one doesnt belong? Why?

### Science

I need a hypothesis on: How does the green house effect influence temperature on Earth? Can you plz not give a link that doesn't help much

### earth

please give me some important tips about a topic 'tiger in trouble'. I have to prepare a chart on this.

### earth

how long will it take Uranium-238 for there to ne 25% of the original radioactive period to be left? i need this question answered ASAP!!!!!(:

### earth science

astonomer think planets formed from interstellar dust and gased that clumped together in a process is called what?

### Science

How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?

### earth science

Astonomers think planets formed from interstellar dust and gases that clumped together in a process called

### physics

for an 84 kg person standing at the equator what is the magnitude of angular momentum about the earths center due to earth's rotation

### Physics

two satellites are launched from earth to the same altitude. One is twice the mass of the other. How will their periods compare?

### Physics

Satellites A and B are in circular orbits, with A two and a half times as far from earth's center as B. How do their orbital periods compare?

### Science

Does the energy move from Earth’s surface and atmosphere out to space through radiation, conduction, or convection? Explain.

### physics

a watermelon has a mass of 8kg and 600 g . how mich force of gravity of the earthwill it experience ?what will be its weight on the earth and the moo

### Physical Science

Energy from the sun reaches Earth mostly by A. conduction. B. convection. C. radiation. D. thermal expansion. I think it's A.

### earth science

Which one of the following is not left in the land as a result of continental glaciers? A. Erratics B. Drumlins C. Loess D. Eskers

### Marketing

Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.

### science

an object being pulled to earth by gravity will have the force of air pushing back opposite directions

### PHYSICS

IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?

### marketing

What challenges do specialized magazines such as Mother Earth News face hen trying to entice advertisers?

### earth science

Which of the following is not an example of a mineral crystal shape? A. Pyrite B. Kryptonite C. Quartz D. Calcite i think its A am i right

### earth

Broad areas of folded rock layers that resemble a bowl turned right-side up are called _____.

### English language arts IV

Which words should be capitalized in the sentence " Hawaii has some of the most beautiful beaches on earth"

### science

Lava flows from cracks in the earth and hardens into basalt, what type of rock result, is the answer sedimentary

### Physics

A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.

### Earth Science

What are some factors that make it difficult for geologist to learn about the Precambrian era?? Please Explain

### Physics

Find the minimum initial speed of a projectile in order for it to reach a height of 2022 km above the surface of the earth.

### geology

list down six techniques used to transfer heat from the earth crust to the surface by fluid circulation

### physics relativity

An observer on Earth sees you travel 1000 m at half the speed of light. What distance do you think that you travelled?

### Maths

A body rises vertically from the earth according to the law s = 64t – 16t2. If it has lost k times its velocity in its 48 ft rise, then k = A)1 B) 1/2 C) 1/3 D)1/9

### Maths

A body rises vertically from the earth according to the law s = 64t – 16t2. If it has lost k times its velocity in its 48 ft rise, then k =

### Science

A body rises vertically from the earth according to the law s = 64t – 16t2. If it has lost k times its velocity in its 48 ft rise, then k =

### Science

The sun's light travels ninty-three million miles to reach the Earth. A. CONVECTION B. RADIATION C. CONDUCTION

### Physics

A raindrop has a mass of 5.9 10-7 kg and is falling near the surface of the earth. Calculate the magnitude of the gravitational force exerted in the following.

### Physics

A laser is aimed at the moon. The spot of light is seen on the lunar surface 2.37 s later. What is the distance from Earth to the mooon

### The Global Ocean

Which of the following strongly influences surface currents? A. Landmasses B. Earth's rotation C. The Moon D. Wind my answer is a.

### math, permutations and combination

1. A group of 25 lecturers include six mathematician. In how many ways can a committee of 4 be selected from this group to include at least one mathematician? 2. In how many ways can the first, second and third positions be taken by ten candidates in a test, assuming that ...

### Math

A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee must answer 5 of the multiple-choice questions and 2 of the open-ended problems, in how many ways can the questions and problems be chosen?

### MATH

A physics exam consists of 9 multiple choice questions and 6 open-ended problems in which all work must be shown.If an examinee must answer 6 of the multiple- choice questions and 3 of the open-ended problems, in how many ways can the questions and problems be chosen?

### English

I have to identify the verbs in the sentence and decide if they are linking,transitive, or intransitive. Please check these and let me know if they are correct. 2. She turned her face to the sun. (transitive) 4. The leaves on the tree turn bright red in the fall. (transitive) ...

### pre calculus

32% of a particular radioactive substance disappears in 227 years. Part 1: Find the decay constant. Your answer must be correct to five decimal places. Part 2: Determine the time T in years required for 93% of the substance to disapper. Your answer must be correct to two ...

### English

Are the following sentences possible? Thank you very much. 1) He shot me in the leg. 2) He showed me the way to the supermarket. 3) He likes shooting. 4) He shouted at him. 5) I always show my gift card to the check-out clerk so that I can get a discount on what I buy. 6)When ...

### science

During space flight, astronauts often refer to forces as multiples of the force of gravity on Earth's surface. What does a force of 5g mean to an astronaut? If Earth were twice as massive but remained the same size, what would happen to the value of g? http://hyperphysics.phy-...

### programming

write a java application to calculate the exponent value of a number using the following specification <Prompt the user to enter an integer value <Pass the integer value to the method squares the number and to a method cubes the number.The result must be returned to the ...

### Economics

The economic concept of guns or butter means that A. a person can spend money on either sports equipment or food. B. a company must decide whether to manufacture guns or butter. C. a government must decide to produce more or less military or consumer goods. D. a government can...

### Geometry

Given quadrilateral ABCD,ABllDC, diagonal AC. we can prove that angle 1= angle 2, but cannot prove angle 3=angle4 Why is this. What must be true about the sides of the Quadrilateral in order to prove that angle 3 is congruent to angle 4? My answer: The sides of the ...

### Geometry

Given quadrilateral ABCD,ABllDC, diagonal AC. we can prove that angle 1= angle 2, but cannot prove angle 3=angle4 Why is this. What must be true about the sides of the Quadrilateral in order to prove that angle 3 is congruent to angle 4? My answer: The sides of the ...

### Anatomy and Physiology

Hello! Thanks in advance for checking my question! ____ 3. Lacrimal bones form the walls of the (1 point) a) eyes. b) nose. c) mouth. d) ears. My Answer: A I'm not sure on this one, and the book doesn't have much information about it. The book says, "Lacrimal Bones, The ...

### Math

Choose the equation of a line that is parallel to y = 3x - 2 and passes through the point (-1,-6). y = 3x + 3 y = 3x - 3 y = (-1/3)x + 19/3 y = (-1/3)x - 19/3 *i think it's the last one! The slope must be 3. That is the "m" term in the form y = m x + b So the correct answer ...

### guidance

Two three-year-olds, Jenna and Neal, are pulling one another's hair. Using guidance techniques, what should you do? A. Ask, "What do you two think you're doing?"B. Say, "You must not do that. It's not nice."C. Remove Neal and say, "You must not pull little girls' hair."D. ...

### Data Management Grade 12

How many different five-letter words can be formed using the letters of the word STEVIN, a) if only one vowel is to be used? b) if both vowels are to be used and E is to precede I? c) if both vowels must be used, they must be adjacent, and E is to precede I? d) if either one ...

### Logical Reasoning

Ted is ordering food at a restaurant. One of the ways to order a dinner is to order a combination meal. Meal 1 includes chicken wings and fries. Meal 2 includes a burger and fries. Ted receives chicken wings as part of his order. Based on the information only, which of the ...

### physics

Tarzan, played by Patrick Huard, 60 kg, must cross a stream 5 m wide, and full of hungry crocodiles. To do this, decides to slide along a sloping tree trunk, hollowed and moist so that there is no friction. After the trunk, there is a part of 3 m platform covered in mud, with ...

### Physics

Tarzan, played by Patrick Huard, 60 kg, must cross a stream 5 m wide, and full of hungry crocodiles. To do this, decides to slide along a sloping tree trunk, hollowed and moist so that there is no friction. After the trunk, there is a part of 3 m platform covered in mud, with ...

### science

how does a metamophic rock form. http://www.cdli.ca/CITE/rocks_metamorphic.htm http://gpc.edu/~pgore/Earth&Space/metamorphic-notes.html

### Science

After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? a. an earthquake or motion along a fault. b. new deposits of sediment must build up on the eroded area. c. folding of sedimentary rock layers. d. a ...

### Science

After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? a. an earthquake or motion along a fault. b. new deposits of sediment must build up on the eroded area. c. folding of sedimentary rock layers. d. a ...

### Statistics

The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to ...

### Statistics

The music industry must adjust to the growing practice o consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to determine...

### Physics

A uniform ladder of mass m is 2.5 m long. Its upper end leans against a frictionless wall. The coefficient of static friction between the ladder and the floor is 0.58. How far from the wall can the lower end be placed before the ladder starts to slip? Hint: for the ladder to ...

### proof by induction

proof by mathmatical induction that the sum of the first n natural numbers is equal n(n+1)/2 It's true for n = 1. Assume that it is true for some n. Then the sum of the first n+1 natural integers can be obtained by dding the last number n+1 to n(n+1)/2. So, the assumption that...

### Math

1. ABC Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10 000lbs of a mixture that is 25% protein? 2. Meg has a solution that is 40% alcohol ...

### Calc

A paper cup is to be designed in the shape of a right circular cone. It must have a capacity of 12 fluid ounces (1 fluid ounce = 1.80469 cubic inches) of soft drink but it must use a minimum amount of material in its construction. What should the dimensions of this paper cup ...

### Physics

The figure shows the treatment of fractures of the humerus shaft with a cast of the upper arm bent by 100 to 110 degrees at the elbow joint, and an attached traction device. The traction device keeps the upper arm under tension to lower the risk of fracture dislocation due to ...

### Math

Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know ...

### Social Studie

1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. 2, Which features form the...

### physic

In order to qualify for the finals in an race, a runner must achieve an average speed of 5.24 m/s for the entire mile race. If she runs at a constant speed of 4.63 m/s for the first half of the 1609 meter race, what constant speed must she maintain for the second half of the ...

### programming

I need help with a C++ exercise. I need to write a code to display a table consisting of four rows and 11 columns. The first column must contain the numbers 1 through 4 and the other columns must contain the result of multiplying the number in the first column by the numbers 0...

### Algebra

Word problem: A house is to be built on a lot 70ft wide by 100ft deep. The shorter side of the lot faces the street. The house must be set back from the street at least 25ft. It must be 20ft from the back lot line and 10ft from each side lot line. What are the maximum length ...

### English

I have to identify the verbs in the sentence and decide if they are linking,transitive, or intransitive. Please check these and let me know if they are correct. 2. She turned her face to the sun. (transitive) 4. The leaves on the tree turn bright red in the fall. (intransitive...

### English

The sentence "Like a boil that can never be cured as long as it is covered up but must be opened with all its pus-flowing ugliness to the natural medicines of air and light, injustice must likewise be exposed" communicates a(n) __________ tone A.Urgent B.Matter of fact C....

### Chemistry

These are all true or false questions, and I think some of my answers may be wrong. Could someone please check them for me? 1) All stoichiometry calculations are based on STP conditions. (True) 2. Given the amount of reactant, you must use coefficients from the balanced ...

### ryan

You propose to build a space ship that allows the entire population of the United States (280 million) to leave earth. Your plans allocate an average space of 1,000(=10*10*10) cubic feet to each person. You space ship is going to have the shape of a sphere. The radius of you ...

### Language Arts

1.which of the following passages from the cay best indicates that Philip will manage to survive without timothy? A. But the two small bars of chocolate that we had been saving for a "feast" were ruined. B. I'd found one lone coconut in a mass of sea grape and broken sticks. C...

### Physics

I found the average acceleration of earths orbit around the sun over a period of 5 days by calculating delta theta and dividing by radius and 1/T. I got the right answer but as I am studying for my test, I am seeing the units do not work...does this make sense? Can someone ...

### collage physics

a block of wood rest on a plane incline at 35 degrees to the horizontal.if the coefficient of the static friction between the surface is 0.45.determine: a) what is the horizontal force that must be applied to the block to initiate motion up the plane b)the horizontal force ...