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

25,359 results, page 80

### Math

How do you solve this problem. Answer must be simplifyed 4/5+5/6-3/10

### Health Physics

What must a muscle do in order to work?

### science

how do we know a song thrush must have ears???

### Math

What must be true for a pentagon so that it will tessellate a plane?

### calculus

What conditions must be satisfied by vectors u and v for this to be true? |u + v| >|u - v|

### Math

4y^2-y^2/y-2x x^2-4/X^2+3x+2 could someone help me. Please I must turn this in tongiht.

### medical

when must a notice of use and disclosure be provided

### physics

4) Why must a geostationary satelite be above the equator?

### childcare

what taxes must be paid only by the employer?

### chemistry

why must a clean rod be used each time?

### chemistry

HOW MANY LITERS OF H2 must react to produce 75.0g of PH3

### math

:Explain why a prime number must be deficient.

### statistics

what type of datat must you collect for a t test and why?

### CHEMISTRY

Why must an organic layer be washed with NaOH?

### calculus

why is that when it comes to diagonal it must be divided into 2

### Electronics

Can you help with questions that have diagrams you must use?

### geometry

If ON=2x-3, LM=7x+2, NM=x+6, and OL=6y-3, find the values of x and y for which LMNO must be parallelogram.

### Science

what are two things that you must know to determine speed?

### Mathematics

Please help exponent questions =[ If 2^x = 10, then 2^2x = If 2a^2 + 3a - 5a^2= 9, then a-a^2= If 9^x = 25, then 3^x+1 = If b^3=4 then b^6 If 2= p^3, then 8p must equal if 5 = a^x then 5/a =

### math

explain why the equation x^(5)-3x+1=0 must have a solution with 0 < x <1

### chemistry

what are four examples of solution for which the concentration must be known?

### Chemisrty

How many grams of KClO3 must react to form 42.0 mL?

### SAT math

If a-b<0, which of the following expressions must be true? A) -ab>a B) b+5>a-5 C) b^4>a^4 D) b^3>a^2 E) 2a>b

### Maths

if y=(x +3)2, then (-2x-6)2 must equal which of the following: a) -4y2 b) -2y2 c) -4y d) 4y

### math

can you me the answer from fraction must be in simplest form!!!!

### MATHS

how many twenties must be added to 3 tens to equal £2.10

### Algebra

Assume that f(3)=4. Name a point that must be on the graph of y=f(x)+4

### Algebra

Assume that f(3)=4. Name a point that must be on the graph of y=1/2f(x/2).

### intro to psychology

To gain acceptance, a hypothesis must be:

### Life orintation

Which subject i must learn if i want to be a doctor?

### AP CALCULUS HELP

first, we must find 2z(dz/dt)=2x(dx/dt) + 2y(2y/dt) simplifying, we get: dy/dt=???(dx/dt + dy/dt) What is that simplified?

### English 3

A verb must agree with its subject in number

### math

what must b added to 183÷11 to make it a integer?

### math

if x...y=(x-y)^2 for all integers which are the following must be true? 1)x...y=y...x 2)x....y=x...(-y) 3)x...(-y)=-x..y

### math

11 divide 100 was difficult for me i think it must be 0.11

### science

things people must have to survive

### lab chimistry

Why we must mix the compound with MnO4?

### maths

what number must be added to 7/12 to get two wholes

### physics

what is the minimum work that must be done to raise a 30.0 kg object from h 7.0 m to h=11.0 m?

### physics

Near the surface of the Earth, a startled armadillo leaps vertically upward at time t = 0, at time t = 0.5 s, it is a height of 0.98 m above the ground. At what time does it land back on the ground?

### math

At a given time, Saturn was 9.1 x 10 to the 8th miles from the sun and the earth was 9.3 x 10 to the 7th miles from the sun. by what distance is one planet closer to the sun than the other planets?

### math

If earth rotates at about 1000 mph and it rotates constantly each day. How many rotations will it complete after 4th hour, 8th hour and 24th hour.

### nats

The Earth receives radiation from the Sun as if the Sun is a blackbody emitter at the temperature near 6000 K, although the temperature inside the Sun is about 15 million K. Explain why?

### physic

unit of distance used in astronomy is the parsec (pc): 1 pc = 3.26 ly. The distance to the Earth's next-nearest star, α-Centauri, is 1.3 pc. Find the distance d to α-Centauri in light-years and in meters.

### business

Appendix E Store Operations Messages Iam not sure how to write a message using this: You are a public relations manager called upon to present information regarding changes in retail store operations to three sets of stakeholders of a clothing store chain. The stakeholders ...

### how concepts develop

Which of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...

### Physics

When an automobile moves over a wide, closed loop of wire embedded in a road surface, is the magnetic field of the Earth within the loop altered? Is a pulse of current produced? Can you cite a practical application for this at a traffic intersection?

### physics

i tried doing this on my calculator but i keep getting the wrong answer..can someone try it on theirs and tell me what they got? thanks Substitute the period in seconds, T = 86,400 s, the gravity constant G = 6.67 multiplied by 10-11 kg-1 m3/s2, and the mass of the Earth, ME...

### Physics

When an automobile moves over a wide, closed loop of wire embedded in a road surface, the magnetic field of the Earth within the loop altered? Is a pulse of current produced? Can you cite a practical application for this at a traffic intersection?

### physics

captain iplanet measures the magnetic forces on a proton which is vertically falling at 1996 m/s at the equator (take the earth's field to be .4 Gauss horizontal and pointing northward). what force would she measure? Give both force and direction.

### Physics Help, Please

In the final stages of the landing process, a spaceship decelerates at a constant rate of 5.3 m/s2 heading towards the Earth. A 3kg lamp is hanging straight down, attached to the ceiling of the ship cabin by a chain. What is the tension in the chain?

### Physics!

Imagine a giant dry-cleaner's bag full of air at a temperature of -31 floating like a balloon with a string hanging from it 15 above the ground. Estimate what its temperature would be if you were able to yank it suddenly back to Earth's surface.

### english

Is these sentences are correct. Even though we have discovered thousands of dinosaur fossils, we still don’t know much about these creatures. While they dominated the earth longer than humans have, they suddenly died out for unexplained reasons.

### Earth Science

Unlike most road maps, topographic maps can be used to find 1: the best route to a town 20 km away. 2: the temperature at any place on the map 3:the elevation above sea level. 4:the distance between two locations

### To ? -- English

Q.Each line contains a mistake and error>Find error and replace it with suitable words>>> Bernard Shaw or Chesterton were known to having jokes at each other‟s expense. Once they faces one other in a corridor. Chesterton stood her ground and firmly said, “I...

### chemistry

Couze The water in the buket has some energy (tempreture) it is absorbed by the water and the ice melts this way water cools...now if you consider the ice outside the bucket water will no longer be in tuch with ice ,since energy of water since must be absorbed the ice first ...

### MACROeconomics - Game Theory

I don’t get anything from below except for (c). Please help me! Thanks. Consider the following game matrix: ....................................................Player B............ ............................................Left............Right....... Player A.........Top...

### Math

Could someone please help me out with the data homework? All I need is someone to check my answers. If any are incorrect could you please explain what I did wrong. 1. A student must answer 7 of 10 questions on an exam. How many different sets of questions can be answered if a...

### earth

You are standing on a planet with a radius 10,000kilometers. It's mass is 10^26 kg. What is the planet's escape velocity from where your standing? Ignore rotation of the planet.

### Physics

1An object is thrown upward at an initial velocity and caught at the same level as it was thrown. What should the maximum height be if the hang time is 6.4? (please report numerical value to 2 decimal places- unit will not be necessary to report) 2An object is thrown upward at...

### yr 8 re

what are genesis 1 & 2? i've never been a great bible reader and i thought genesis was just when God created the Earth and so on, but I'm supposed to know the difference in WRITING,like calling God 'Lord' amd stuff... please help!

### Physics

i have just started physics, can someone please show me step by step how to do this: The radius of Earth is 6 370 000 m. Express this measurement in km in scientific notation with the correct number of significant digits. thank you for your help

### trig

an airplane leaves the airport and flies due west 150 miles and then 240 miles in the direction 200°40'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?

### Physics

Near the equator, the Earth's magnetic field point almost horizontally to the north and has a magnitude of B = 50 micro T. What should be the magnitude and direction for the velocity of an electron if its weight is to be exactly balanced by the magnetic force?

### Math

An airplane leaves the airport and flies due west 170 miles and then 240 miles in the direction 200°30'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?

### physics

Locate the position of a spaceship on the Earth-Moon center line such that, at that point, the tug of each celestial body exerted on it would cancel and the craft would literally be weightless. What is the distance (in m from the moon)

### world history

with the adoption of hristianity by constantine, the emperor a. stopped using images of pagan gods b. was no longer worshipped as a god c. ended pagan rituals and ceremonies d. was called God's deputy on earth

### math

a building cast a shadow approximately 130 ft long on the street when the suns ray form an 82.9 degree angle with the earth. how tall is the building? 180-82.9-90= 7.1 degree tan 7.1 = x/130ft x= 16.19ft is this correct? thanks!

### Physics

A person can jump a maximum horizontal distance (by using a 45 percent projectile angle) of 3 m on Earth. The acceleration of gravity is 9.8 m/s2. What would be his maximum range on the Moon, where the free-fall acceleration is g/6 ? Answer in units of m

### Physics

A person can jump a maximum horizontal distance (by using a 45 degree projectile angle) of 3 m on Earth. The acceleration of gravity is 9.8 m/s2. What would be his maximum range on the Moon, where the free-fall acceleration is g/6 ? Answer in units of m

### Physics

A person can jump a maximum horizontal distance (by using a 45 degree projectile angle) of 3 m on Earth. The acceleration of gravity is 9.8 m/s2. What would be his maximum range on the Moon, where the free-fall acceleration is g/6 ? Answer in units of m

### Physics

A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E) 2,000 m

### Physics

A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E) 2,000 m

### Physics

A projectile is fired from the surface of the Earth with a speed of 200 meters per second at an angle of 30° above the horizontal. If the ground is level, what is the maximum height reached by the projectile? (A) 5 m (B) 10 m (C) 500 m (D) 1,000 m (E) 2,000 m

### Physics

An airplane flies 220 km due east, makes a right-angle, and then flies 400 km due north. Find the magnitude of the plane's displacement from it's starting point. Neglect the culrvature of the earth

### science

Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not

### physics

Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not.

### Physics

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one?

### Physics

At ground level g is 9.8m/s^2. Suppose the earth started to increase its angular velocity. How long would a day be when people on the equator were just 'thrown off'? Why is the expression 'thrown off' a bad one ?

### 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. ...

### Calculus

Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth?

### Rocket Science

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth

### Math/Science

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 260 miles and a perigee of 220 miles above the surface of Earth.

### science

what move tectonic plates around earth?and how does it move the plates?

### tangential velocity physics

find the tangential velocity of earth and moon

### Earth Science

My question is what is the ability of some natural materials to reflect and absorb sunlight? What do they mean natural materials? I could answer this on my own if I understood what is considered a natural material.

### physics

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?

### physics

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?

### Solar Energy

With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), \(P_{mpp} \lt V_{oc} \times I_{sc} \) b) For a given Irradiance and ...

### Windows 7 operating system

A medium-sized survey company stores sensitive government data that is used as part of the study. A security requirement from the government requires that all sensitive data must remain stored at the company's head office. All staff and the head office network have undergone a...

### social studies

the task of economic policy is to create a properous america. The unfinished task of properous Americans is to build a Greta Society. Our accomplishment have been many; these tasks remain unfinished:> to achieve full employment without inflation;> to restore external ...

### math

Jeanette wishes to retire in 30 years at age 55 with retirement savings that have the purchasing power of $300,000 in today’s dollars. 1. If the rate of inflation for the next 30 years is 2% per year, how much must she accumulate in her RRSP? 2. If she contributes $3000 at ...

### physics

A mass m = 88.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 15.8 m and finally a flat straight section at the same height as the center of the loop (15.8 m off the ground). Since the mass would not make it around the loop if ...

### 9th Grade Biology

Sometimes, a new experimental result may seem to go against a well-established scientific theory. Often, such results seem like they are the results of researcher error. Regardless, scientists cannot just ignore new findings that disagree with accepted ideas. Which statement ...

### science

these are all very confusing for me 1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really ...

### BAA App. Essay Help! (please read!)

One of my personal achievements has to do with artistic. When I was in the 7th grade I participate in the 2012 Reflections Competition. The theme was "Diversity Means...". I decided to do visual arts. In my art work, I drew a huge earth and on top of the earth I drew five ...

### visual

Choose three (3) works of art from three artists from the Baroque period through the Postmodern era. Your three (3) works of art should come from the time periods or art movements covered in the reading from Unit 4 and Unit 5. Your choices must comply with the following ...

### Math

50% Rule: The repackaged vial or unit dose must have an expiration date placed on it; but it is not the same expiration date as what is on the stock bottle. You must take the date on the stock bottle and write the half way date between today’s date and the expiration date. ...

### Windows 7 operating system

A medium-sized survey company stores sensitive government data that is used as part of a study. A security requirement from the government requires that all sensitive data must remain stored at the company’s head office. All staff and the head office network have undergone a...