Why must the centre of the satellite orbit coincide with the centre of the Earth?
25,660 results, page 68

space
the pull of gravity between earth and the sun acts across how many kilometers of space. 
Science (Chemistry)
The Average density of Earth is 5.52g/cm^3. What is its density in a. kg/m^3 b. lb/ft^3. Please help me set up these equations. Thank you! 
chemistry
Why do Alkali Metals & Alkaline Earth Metals have so much difference in their properties? 
geography
Into how many degrees of longitude is the Earth divided? My answer is 360 degrees. Am I correct? 
physics
An engine draws water from a depth of 10 m from earth at aspeed of 2m/s at arate of 10 kg/10 s. What is the power of the engine? 
Physics
How far above the surface of Earth would you weigh 63.6 percent of your surface weight? 
reading
Why do you think the earth's crust is thicker under land than under bodies of water? 
Science Help
mass = 4.5 kg Compare and contrast the mass and weight of this bowling ball on Earth and the moon. 
Physics~
The moon's gravity is onesixth that of the earth. What is the period of a 0.25 m long pendulum on the moon? 
physics
A canoe has a velocity of 0.31m/s southeast relative to the earth. The canoe is on a river that is flowing 
physics
a pendulum is 0.75 meters long and has a period of 4.17seconds is this pendulum on the earth moon or mars? 
biology
why is carbon so abundant in living things when oxygen is the most abundant element on earth 
physics
The force of gravity on a box is 597 N on the surface of the Earth. Find the mass of the box. 
physics
A body has mass 400kg on earth. What will be it mass on the moon if the Acceleration due to gravity is 9.8m/s2? 
physics
Osmium is the densest metal on earth. It has a density of 22.61 g.cm–3. Which of the following best represents this density in kg.m–3? 
Science
Does the tilt of the earth cause one hemisphere to be closer to the sun? True or false False. 
Physics
1 m pendlum on Earth has a period of 2 s. What would it's period be on the moon where the acceleration due to gravity is 1.63 m/s2 ? 
Earth science
If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ? 
Earth science
If a sample contains 50g of carbon 14 and 50g of nitrogen 14 , how many lives has it undergone ? 
earth science
An element's atomic number is 52. How many electrons would an atom of this element have? 
ChemTemperature and Volume Relationships
What condition must be true when conducting temperature volume measurement? Why would a rubber balloon be a poor system for this kind of expirement? The general equation is (P1V1)/T1 = (P2V2)/T2 If V and T are being studied, then P must be held constant. Would you think P ... 
org chem
My prof asked us the requisites for e delocalization. Sigma e delocalization Must have ch bond next to a sp2C Pi e delocalization Must have sp3 lone pair attach to an sp2C. Prof said there are more requisites besides on what ive written. I think if it has high en? What is ... 
Geometry
For what value of y must LMNP be a parallelogram? (A foursided figure LMNP has two horizontal sides and two sides that fall from left to right. Figure LMNP has angles labeled as follows: L, 75 degrees; M, unlabeled; N, 75 degrees; P, y degrees. 75 degrees75° y degreesy° ... 
Physics(check)
9)You are taking a road trip to the beach for Spring Break. You leave at 12:00pm. At 12:10 you stop for lunch 10 miles down the road. You get back on the road and travel 75 more miles and realize that you need to stop for gas. You notice that it is now 1:10pm. At this point in... 
english grammar
I have learned active listen, when people talk you must really listen to other team members. Don’t jump to conclusion let people finish to talk. Make things clear for yourself and for the sender and let the sender know that you really understand him. I don’t like give ... 
Algebra
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: w=Cr 2 where C is a ... 
inequality
Define a variable and write an inequality. Then solve. A local summer baseball team plays 20 games each season. So far, they have won 9 games and lost 2. How many more games must they win this season to win at least 75% of all their games? I don't know what define a variable ... 
English
Writeacher, I downloaded a few details about modals expressing possiblity/probabity but I'm still doubtful about their use. My questions to you are numbers 12. Using modals to talk about the present: 1)Will / won't We use will and won’t when we are very sure: •She’ll be... 
English
Writeacher, I downloaded a few details about modals expressing possibility/probability but I'm still doubtful about their use. My questions to you are numbers 12. Using modals to talk about the present: 1)Will / won't We use will and won’t when we are very sure: •She’ll... 
Grade 11 math
A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ... 
trig pls.. help me
A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the rocket's angle of ... 
PhysicsIn what direction relative to north must ca
Two canoeists start paddling at the same time and head toward a small island in a lake, as shown in the figure . Canoeist 1 paddles with a speed of 1.60 at an angle of 45 north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 due east of canoeist... 
Science
1. Describe the landscape of the ocean floor. 2. (a) What is the MidAtlantic Ridge? (b) What is the relationship between an ocean ridge and an ocean trench? 3. What new technologies allowed scientists to confirm that the sea floors are spreading? 4. Hess hypothesized that new... 
Scienc
World poplation grow each year,does this mean the mass off earth increases each year? Why? 
Regents
Where is the site of the Regents countdown for Earth Science? It has the days, hours, minutes, etc. and I can't find it. Please help. Thank you. 
earth science
As an observer travels due east or due west, what happens to the angle of Polaris? 
Geology
I know that the earth quakes and shakes during a earthquake, but I do not understand how it moves. Can somebody explain how it moves? 
Earth Science
can someone help me? wat is the difference between the scientific theory and the scientific law? plz and thank you 
Nouns
Hawaii is one of the most beautiful places on earth. Would "places" be considered a noun?? 
Physic
How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface? 
EARTH science
A 100gram rock has a volume of 35 cubic centimeters. Find the density of the rock. 
space
How many Earth Diameters would it take to reach the Sun 93,000,000 miles away? 
Science
Ok, so I'm doing a project on the Earth's layers, and I just have a question on the model. DOES IT HAVE TO BE 3D? If it is, I'm dead meat. 
geometry
a globe of the earth measures 12 inches in a diameter. calculate the surface area and volume of this globe 
Science
By what factor would your weight change if the earth's diameter were doubled and its mass were also doubled? Thanks :) 
Earth Science
Were there any lessons learned from the Valdez Spill that helped contain the devastation of the BP spill in the gulf? 
Science
Dingtu can lift a weight of 60 kg on the earth. How much will he be able to lift when on moon? A. 60 Kg B. 10 Kg C. 360 Kg D. 120 Kg 
Physics
If an astronaut in full gear has a weight of 1150 N on Earth, how much will the astronaut weigh on the Moon? 
Science
How can scientists use the geologic time scale by sequencing the events of the earth in a time line? 
Science
How can scientists use the geologic time scale by sequencing the events of the earth in a time line? 
physics
How might you determine the age of a star from an Earthbased telescope? What measurements might you make? 
physics
How might you determine the age of a star from an Earthbased telescope? What measurements might you make? 
physics
On Planet Y, the value of g is 12 m/s/s. If the human weighs 685 N on this planet, then how much woud he weigh on earth? 
earth science
The gently sloping shallow area that extends from the continental shore is the called the continental? 
Physics
What would the weight of an object that is 4N on the earth be on the moon (acceleration due to gravity on the moon is 1.62m/s2? 
Physics Projectile Motion
What angle (from earth) should one shoot a projectile so that it reaches it's maximum? 
physics
a 70 kg astronaut is loaded so heavily that he can jump only to a height of 10 cm on earth.how far can he jump on the moon? 
Science
How does the position of Earth's axis at the March and September equinoxes compare to its position at the summer solstice? 
Science
About 10 percent of the earth’s surface are covered with glaciers today. Where are most of these glaciers found 
earth science
If a sample contains 50g of carbon14 and 50g nitrogen14 how many half lives has it undergone? 
Science
How far does any object on Earth fall after being in free fall for 7.5 seconds? Remember g=9.81 m/s2 
Algebra
The distance from the Earth to the sun is 93,000,000 miles. Write this number in scientific notation. 
Science
List some of the atmospheric conditions that might be described as weather? What is the purpose of weather on the earth? 
earth science
_____ currents assist in the transfer of energy from warmer climates to cooler climates 
math
the scientific notatio of velocity of light velocity of sound distance between the sun and earth 
maths
Angle of elevation of sun from earth is called? (A) sunset (b) sun's altitude (c) sunrise (d) none 
Physics
An astronaut on earth has a weight of 850 N calculate his weight on the moon where the gravity is 5 times less 
Earth Science
Compare the classification of minerals with the classification of rocks. 
Science
Summarize the hydrologic cycle, and how important this cycle is to earth. 
science
erthquake would be on earth as _______ would be on venus? 
science
an earhquake would be on earth as ______ would be on venus? 
science
what are the four major fields of earth science? please help and thank you 
earth
Plate Tectonic Theory: What evidence that supports this theory? 
earth
Plate Tectonic Theory: What evidence that supports this theory? 
physics
A woman has a mass of 42.9 kg. What is her weight on earth? and what is her weight on the moon, where g=1.17 m/s2 
Earth science
what are the causes of groundwater contamination? How can you stop the contamination? 
Science
full composition that explains the composition of the earth’s layers 
Science
How is the water in icebergs involved in the water cycle on Earth? 
Tides
What astronomical bodies are most responsible for the tides on earth? 
Help Science!!! :( need help
Is earth an inner planet or outer planet??? 
PHYSICS
Sun..BLANK....than moon. earth iS..BLANK... mercury. 
physics
At what altitude the value of g becomes 3/4 of its value on the surface of earth? 
science
at what altitude the value of g becomes 3/4 of its value on the surface of earth ? 
physics
realation between earth gravity and moon gravity 
Physics
A person weighs 600 N on Earth. What is the person's mass? 
Chemistry
Which of the following statements are false regarding using a solid drying agent? (select all that apply) a) Water can be present due to isolation and/or purification conditions b) A good drying agent must be soluble in organic solvent c) One type of drying agent is sodium ... 
french
Here is my last post for a little bit I have two questions one Mme when ever you reply all the accents on my screen turn weird is there a problem with that? and here are 3 more with english and french SaintLouisDuHa!Ha! English If you are going to book an event why not do ... 
Science Urgent Please help
(I have no idea how to even approach this question. Can anyone please help me?) Some people have proposed that the earth could solve its population problem by shipping people off to space colonies, each containing about 10,000 people. Assuming that we could build such large... 
physics
i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was wrong. I doubt if ... 
Math
Working with simple addition and multiplication of positive and negative numbers. Have completed 59 of 60 problems on a worksheet, I am stumped by one of them. For example Two numbers are given 30 and 13, You must find two number multiplied together equal 30 and when added ... 
Alg2
A video store has 8 new releases this week. Each is available on videotape and on DVD. How many ways can a customer choose a new release and a format to rent? answer here How many ways can six different books be arranged on a shelf if one of the books is a dictionary and it ... 
english
Please don't just give me the answer, because I won't learn that way. I am home schooled, and my parents are at work during the day. 9. Which sentence corrects the following sentence? The final decision must be made by Ellen and he. (1 point) A. The final decision must be made... 
Quadratic Equations
Describe a sporting situation that has quadratic characteristics. Use key terms such as maximum or minimum, starting or ending points(ordered pairs), shape, vertex, etc. to explain why the situation could be considered to have quadratic characteristics. A complete response ... 
Math
I have no idea, but I guessed 5 pieces won out of 15. Anyhow here is the question. During an art contest at your school, you and a classmate each won blue ribbons for 1/3 of the pieces you entered in the contest. You won 2 blue ribbons and your classmate won 3 blue ribbons. ... 
physics
Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crashresistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown... 
Physics
Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crashresistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown... 
Algebra
'L' has yintercept (0,3) and is parallel to the line with equation y=2/3x+1. (Instructions  write the equation of the line 'L' satisfying the given geometric conditions) We know that two lines that are parallel must have the same slope. So this line must have the slope (2/3... 
physics
consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a. downward b.northward c.westward d.woutheastward 
a&p
If an astronaut returned to earth after a 180 day stay in a weightless space station he would have a decrease in bone mass? true or false? 
science
Would you say,as a whole,we who live on the earth,are living sustainable or unstainable lifestyles.Why? Also in what ways might we be wasting our natural capital?