Why must the centre of the satellite orbit coincide with the centre of the Earth?
25,660 results, page 74

English
Identify the correct sentence. A. A crew of six people must travel long distances nearly every day to harvest bamboo for two pandas. B. A crew of six people must nearly every day travel long distances to harvest bamboo for two pandas. C. A crew of six people must travel long ... 
physic
What does "seven earths" as mentioned in surah alTalaq acctually mean? It means that, according to the Quran, Allah created seven heavens, each contining one earth. 
Music
I want to make a song with the theme of "Planet Earth", although I'm not good at singing, so I'm just looking for a beat song. Can anyone of you suggest a genre or what instruments should I use? 
Geology
Suppose the shadow zone for P waves was located between 90° and 110°, rather than between 105° and 140°. What would this indicate about the size of the Earth’s core? 
english
Which of the following is not characteristic of the suras in the Koran? a. they are lyrical passages b. they are written in rhymed Arabic verse c. they emphasize the mercy of Allah d. they emphasize the richness of life on earth D 
science
A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? 
Universe and Stars
As u look at the stars that re beyond and farther away, what occurs to the angle measured at earth? at what point will this method no longer work? Someone please help explain 
Physics
Please help me solve this! The spectrum of the sodium atom is detected in the light from a distant galaxy. If the 590.0 nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the Earth? 
science
A total solar eclipse means that no sunlight reaches a certain area on earth. true false Just need to know if my answer or right or wrong. Thanks! :) true 
science
A total solar eclipse means that no sunlight reaches a certain area on earth. true false Just need to know if my answer or right or wrong. Thanks! :) false 
College Algebra
The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years. 
earth
classify each of the folowing layers as liquid,rigid,or solid but able to flow slowly:lithosphere,asthenosphere,lower mantle,outer core,inner core. 
pre cal
The radius of the earth is approximately 3960 miles, what is the linear speed of a point on the equator in miles per hour. Round your answer to the nearest mph. 
physics
While on the moon, the apollo astronauts enjoyed the effects on gravity so much smaller then that ont he earth. If neil armstrong jumped up on the moon with the initial speed 
Algebtra
from 630 feet at the top of the horizon. Due to the curvature of the earth how far away is the city. using d=sqrt[3h/2] where d is the distance in nautical miles and h is the height in feet. 
Physics
light travels at a constant speed of 3x10*11 cm/sec. how long does it take light to reach the earth a distance of 1.5x10*8 km. give the answers in seconds and minutes. 
physics
light travels at a constant speed of 3x10^11 cm /sec how long does it take light to reach the earth a distance of 1.5x10^8 km give your answer in seconds and minutes. 
physical
a rocket moves through outer space at 11,000 m/s at this rate how much time would be required to travel the distance from earth to moon which is 380,000 km 
earth
A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. What is the vertical velocity component of the ball? Round the answer to the nearest tenth of a m/s. 
astronomy
If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters. 
Maths
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform. 
Maths
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform. 
Maths
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform. 
Maths
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform. 
chemistry
how much heat would be required to warm the earth's oceans by 1 degree celcius if the volume of the earths oceans is 137x100000000km3 and the density of the seawater is 1.03g/cm3 
math
in 1933 wiley post flew around the world in 7 DAYS 18 HOURS. WILEYS TRIP WOULD BEST BE DESCRIBED AS FLYING AROUND THE ? OF TEH EARTH. 
physics
If a person pushes on a block and it travels a distance of 6.0m before stopping. How far would the block travel if it were pushed with the same force, but on the moon(which has 1/6 of the earth's gravity). 
INTSCIENCE
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False 
Earth Science
15. _______ currents assist in the transfer of thermal energy from warmer climates to cooler climates. A. Platonic B. Plutonium C. Convection D. Tectonic C? Please explain 
Weight Is Force! Science
A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet? 
Biology
Explain the structure of a water molecule and how hydrogen bonding leads to some of its very special properties. Be sure to include how these properties are important to life on Earth 
Physics
what is the angular speed of the earth as it orbits the sun a) in radians/second? b) in degrees per day? I need help please. Use the equation and step by step to get the answer 
English
Description: does anyone has teas 6, the new version , passage about new York central park, earth cousin, or time management , if i anyone has it let me know am willing to pay anything for it 
Social studies. PLS HELP
19. Byzantines believed that their emperor(1 point ) A. should report to the pope B. represented Jesus Christ on earth C. was immortal D. should be more religious 
Geography
The most accurate way to show Earth's continents and bodies of water is with a(an)? 1) Mercator projection 2) globe 3) Robinson projection 4) equalarea map I think #3 
Sculpturing Earth's Surface
What is the source of almost all ground water? A. The ocean B. Human activity C. Rainwater soaking into the ground D. Absorption from rivers My answer is d. 
physics
Given that Earth orbits the Sun with a semimajor axis of 1.000 AU and an approximate orbital period of 365.24 days, determine the mass of the Sun. (1 AU = 1.496 ✕ 1011 m) 
physic
Given that Earth orbits the Sun with a semimajor axis of 1.000 AU and an approximate orbital period of 365.24 days, determine the mass of the Sun. (1 AU = 1.496 ✕ 1011 m) 
Earth's Dynamic Atmosphere
What is the mainstream unit of measuring air pressure? A. Inches of mercury B. PSI C. Pounds per square foot D. Centimeters of mercury my answer is a. 
science
1) Which of the following is a valid reason why a scientist might reject a scientific theory? (1point) Some people disagree with it. It covers too broad a topic. New evidence contradicts it.*** It is too old. 2) A scientific hypothesis must be (1point) Correct Able to be ... 
Art
I left out the following sentences. Thank you very much for your invaluable help, Writeacher. 1) On my summer holiday(s) I’m competing in a chess tournament in the first week of July. It will probably be difficult because the best players will participate. 2) Where will you ... 
PhysicsPlease check
Posted by JulieAnne on Wednesday, January 5, 2011 at 5:15pm. Please check my two answers I was sitting in a park on a bench next to another person and I moved tow times the original distance between the two of us, the force of gravity between me and the other person would be: ... 
(Arts/Theater)(Stuck on what to do) Help please?
My improvisation teacher today told us to bring something with us to class where you can do a physical action with it. This action must be something you can do in barely 10 minutes and must have an actual ending to that action. We're doing this assignment tomorrow and I have ... 
Math
It takes the earth about 31,558,100 seconds to circle the sun. By how many seconds does this exceed the number of seconds in 365 days? 
Science Astronomy
How are Earth and Venus different? I already wrote that they have different atmospheres but I need another reason why are different so can someone help me please? 
Riddle
I am something, I appear first on earth, second in heaven. I appear twice in a week, Never in a month, but I appear once in a year what am I? 
Calc BC
A shoe company will make a new type of running shoe. The fixed cost for the production will be $54,000. The marginal cost will be $25 per pair of shoes. The shoes will sell for $115 for each pair. a) Write the cost function b) Write the revenue function c) Find the number of ... 
Calc BC
A shoe company will make a new type of running shoe. The fixed cost for the production will be $54,000. The marginal cost will be $25 per pair of shoes. The shoes will sell for $115 for each pair. a) Write the cost function b) Write the revenue function c) Find the number of ... 
Math
A shoe company will make a new type of running shoe. The fixed cost for the production will be $54,000. The marginal cost will be $25 per pair of shoes. The shoes will sell for $115 for each pair. a) Write the cost function b) Write the revenue function c) Find the number of ... 
English
Posted by rfvv on Thursday, December 16, 2010 at 3:21am. {At a restaursant} For hear or to go? Is this for here or to go? It's for here, please. It is to go, please. (Are the expressions above all grammatical? What is the meaning of 'is to' in 'It is to go, please.'? Does it ... 
Mathematics
Don is planting flowers in the school garden's planter box. The planting are is five and onehalf feet long and 10 inches wide. Each plant is 2 inches wide. There must be 8 inches of space between the flowers. What is the largest number of plants he can put into the planter ... 
Physics
please check: 1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall. STRAIGHT DOWN 2. Which is the force of an acceleration? FORCE 3. A freebody diagram of a ball falling in the presence of air ... 
physics.
MultipleConcept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of ... 
Physics
MultipleConcept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of ... 
what does this mean???
Students must make a choice concerning their daily practices that will reduce the amount of energy that is consumed in their practice. This must be clearly illustrated using fotor, including the choice made, types of energy conserved, approximate amount of energy conserved, ... 
French
Can someone check this recipe for me? I don't know how to use "de" properly. * 1 livre [454 g] de les liens de saucisson italiens doux, a coupé * 6 oeufs * 2 [10ounce/de 284 mL chaque] d'emballe gelé a coupé des épinards, dégelés et bien drainés * 1 [16ounce/de 454 g... 
Economics
Suppose that the average earnings for high school graduates is $25,000, the tuition, fees, and books for typical year of college total $10,000 and that a college degree takes 5 years. a) How large must the present value of the increment to earnings from getting a college ... 
math
Suppose that the average earnings for high school graduates is $25,000, the tuition, fees, and books for typical year of college total $10,000 and that a college degree takes 5 years. a) How large must the present value of the increment to earnings from getting a college ... 
algebra 2
Factor completely with respect to the integers. 1. 9x^2  4 2. x^3 + 64 3. 200x^2  50 4. 8x^3  64 5. x^3 + x^2 + x + 1 6. x^3  2x^2 + 4x  8 7. 2x^3 + 4x^2 + 4x + 8 8. 2x^3 + 3x^2 32x  48 9. 7x^3 + 14x^2 + 7x 10. 6x^3  18x^2  2x +6 11. 3x^4  300x^2 12. x^4 + 12x^3 + 4x... 
Maths Algebra
Mass of Earth is (5.97×10^24)kg and Mass of Moon is (7.35×10^22)kg.What is the Total mass of the two? 
Physics
Block A is 4.5 kg and Block B is 2.25 kg. a. determine the mass of block C that must be placed on block A to keep it from sliding if the coefficient of static friction between block A and the table is 0.2 b. If the coefficient of kinematic friction between the surface and ... 
Science
What are the differences between terrestrial biome and aquatic life zone? A terrestrial biome is on land. An aquatic life zone is in water. Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://lpc1.clpccd.cc.ca.us/lpc/kmoore/biology10/... 
physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ... 
Math  General word problem
At a certain dance class, each student must pick exactly one partner. Each pair of dancers must consist of one advanced student and one beginner student. At first, after everyone pairs up, there are 4 extra beginner students. Then, after half of the beginner students have left... 
Today is my.......
Today is my birthday! I wonder what is my HOROSCOPE SIGN? Is it Capricorn? HAPPY BIRTHDAY KAVERI!!!!!!!! WHEN I SAY HAPPY YOU SAY BIRTHDAY HAPPY BIRTHDAY HAPPY BIRTHDAY HAPPY BIRTHDAY TO YOU , HAPPY BIRTHDAY TO YOU , HAPPY BIRTHDAY DEAR KAVERI HAPPY BIRTHDAY TO YOU......... ... 
Chemistry
I need help finding reactions beneficial to society. Here's the assignment quoted. "Your assignment is to research two different chemical reactions that are used to address social/environmental needs or problems. These reactions must clearly be attempting to improve our world... 
Chemistry
I need help finding reactions beneficial to society. Here's the assignment quoted. "Your assignment is to research two different chemical reactions that are used to address social/environmental needs or problems. These reactions must clearly be attempting to improve our world... 
Math  Word Problem
At a certain dance class, each student must pick exactly one partner. Each pair of dancers must consist of one advanced student and one beginner student. At first, after everyone pairs up, there are 4 extra beginner students. Then, after half of the beginner students have left... 
physics
a 50 kg crate is at rest on a level surface the coefficients of friction are 0.3 and 0.4,what is the normal force acting on the crate, a man begins pushing horizontally on the crate how much force must the man exert to start the crate moving, how much force must the man exert ... 
science
(a) at what times of year are the periods of daylight and darkness the same everywhere on the earth? What are these times called? (b) Where is the noon sun directly overhead at these times? 
physics
Rank the average gravitational forces from greatest to least between:A. Sun and Mars.B. Sun and the Moon.C. Sun and Earth. i answer b,c,a and its wrong 
coulomb law and gauss law Physics
Two negative particles of charge=Q and mass=rn orbits a stationary, positive particle of charge=+2Q at a radius= R' They are always at diametrically opposite points on the orbit. a. Find the total inward Coulomb force on one negative particle. b. Write the equation that total... 
Diversity in the Classroom
Imagine that you have been asked to serve on the advisory board for a new, alternative school program in your school district. The advisory board must specify the factors that will be considered in determining which students qualify for the program and they must create a plan ... 
physics
(a) Find the force P that must be applied to a piston of area 10.60 cm2 to produce sufficient fluid pressure to support a car weighing 12,101 N by means of a column of fluid of cross sectional area 285 cm2 as seen in the figure below. F1/A1=F2/A2 F1=F2*A1/A2 12101*10.6/285 =... 
Physics
The Hubble Space Telescope (HST) has recorded evidence of a black hole at the center of the M87 galaxy. Using Doppler data, it's been measured that matter is orbiting the center of this galaxy at an orbital speed of 7.5x10 5 m/s, out at a radius of 5.7x10 17 m. Calculate the ... 
physics
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ... 
science
when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter from the center the girl must move to 3 meter ... 
Physics
Understanding Newton's First and Second Laws, why do all objets near Earth accelerate at a constant rate "g"? I'm very confused, is it something about how inertia keeps the objects accelerating? Please help , thank you. 
Atmospheric Science
One of the earliest examples of primitive humans, Australopithecus, lived in Africa between about 4 and 1 million years ago. For what fraction of Earth history have hominids been around? 
PHYSICS
The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below? 
phys3
A biologist is studying growth in space. He wants to simulate Earth's gravitational field, so he positions the plants on a rotating platform in the spaceship. The distance of each plant from the central axis of rotation is r = 0.11 m. What angular speed is required? 
physics
During a thunderstorm, the separation between the clouds and the earth acts as a giant capacitor with a capacitance of 2,500 µF (µ is the SI prefix for 106). If a tower is struck by a lightning bolt that releases 50 C of charge, how much energy is released? 
Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory? 
Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory? 
Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory? 
SOC 302
According to the authors, why did the Administration under George H. W. Bush oppose the Rio Earth Summit environmental treaty? A:Belief that provisions to slow global warming should be modified and weakened 
physics
Suppose that the displacement of a particle is related to time according to the expression delta x = ct^3. What are the SI units of the proportionality constant c? My answer: delta x = ct^3 m = c s^3 (s: seconds) m/s^3= c The SI units for c: m/s^3 correct? 2) Determine if ... 
physics
A helicopter is ascending vertically with a speed of 5.60m/s. At a hight of 115m above the earth, a package is dropped from a window. How much time does it take for the package to reach the ground. 
Physical Science
A rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km? 
Science (Atmosphere)
What happens to the energy absorbed by Earth's surface and atmosphere? They get radiated back into space as longer wave radiation. Is there anything else I should add to this answer? Thanks. 
EARTH SCIENCE
If the warm North Atlantic Drift were to cease, how might the climate of Western Europe change?Speculate about how such a climate could influence the biosphere? help me please. 
Earth
So how long will global warming last for in the future? Remember the movie, "The Day After Tomorrow"? The whole world might experience all those disasters depicted in the movie. 
science
For any mass m located anywhere in the universe, F=mg is the formula that tells the gravitational attraction between m and the earth, true false Just need to know if my answer or right or wrong. Thanks! :) False 
Science
For any mass m located anywhere in the universe, F=mg is the formula that tells the gravitational attraction between m and the earth, true false Just need to know if my answer or right or wrong. Thanks! :) False 
Earth Science
During the Dinosaur Ages, if there was a region with a mountain range, alluvial plain, and a shallow sea. Which place would it be the most likely for dinosaur fossils to be formed? 
Science
Need help on the question below...I know it is not C or D The formation of metamorphic rocks depends on all of the following except a. the composition of parent rocks b. Earth's magnetic field c. temperature d. pressure Thanks 
Physical Science
a rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 381,000 km? 
math
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a plat form of dimension 28m by 22m. Find the height of the platform. 
Physics
Calculate the energy needed to accelerate a spaceship of mass 10,000 kg to a speed of 0.3c for intergalactic space exploration. Compare with the projected energy usage of the Earth in a decade 10^22J? 
Physics
What is the apparent weight of a 70kg astronaut 3800 km from the center of the earth's moon in a space vehicle moving at constant velocity and acceleration toward the moon at 2.9m/s^2? State the direction in each case.