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	Gravitational radiation - Wikipedia, the free encyclopedia
		In physics, a gravitational wave is a fluctuation in the curvature of space-time which propagates as a wave.
		Gravitational radiation has not been directly observed, although there are a number of existing and proposed experiments such as LIGO that intend to do so.
		A sufficiently strong sea of primordial gravitational radiation, with an energy density exceeding that of the big bang electromagnetic radiation by a few orders of magnitude, would shorten the life of the universe, violating existing data that show it is at least 13 billion years old.
	en.wikipedia.org /wiki/Gravitational_radiation (2250 words)

	Gravity - Wikipedia, the free encyclopedia
		Gravitational acceleration, and acceleration in general, is measured in metres per second squared or in non-SI units such as galileos, gees, or feet per second squared.
		The sea-level gravitational acceleration is 9.780 m/s² at the equator and 9.832 m/s² at the poles, so an object will exert about 0.5% more force due to gravity at sea level at the poles than at sea level at the equator [1].
		For any mass distribution there is a scalar field, the gravitational potential (a scalar potential), which is the gravitational potential energy per unit mass of a point mass, as function of position.
	en.wikipedia.org /wiki/Gravity (4408 words)

	Learn more about Gravity in the online encyclopedia. (Site not responding. Last check: 2007-10-26)
		Gravitation is the force of attraction that exists between all particles with mass in the universe.
		The gravitational attraction of protons is approximately a factor 10
		Crucial experiments that justified the adoption of General Relativity over Newtonian gravity were the gravitational redshift, the deflection of light rays by the Sun, and the precession of the orbit of Mercury.
	www.onlineencyclopedia.org /g/gr/gravity.html (1534 words)

	Gravity -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-26)
		The first mathematical formulation of the theory of gravitation was made by (English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion (1642-1727)) Sir Isaac Newton and proved astonishingly accurate.
		This law of universal gravitation was originally formulated by (English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion (1642-1727)) Isaac Newton in his work, the (Click link for more info and facts about Principia Mathematica) Principia Mathematica (1687).
		Newton's law of universal gravitation can be written as a (A variable quantity that can be resolved into components) vector (A mathematical statement that two expressions are equal) equation to account for the direction of the gravitational force as well as its magnitude.
	www.absoluteastronomy.com /encyclopedia/g/gr/gravity.htm (4061 words)

	Collected Papers Concerning Gravitational Attraction (Site not responding. Last check: 2007-10-26)
		If the gravitational equation is applied in its generalised form, where centre of mass defines the body to a sufficient degree, then the means for accurate prediction of the motions between bodies from local to a Galactic basis and beyond is provided.
		Thus gravitons exist within the core, possessing all the attraction generating characteristic we associate with gravity, and with its high velocity, and may in fact, form a major component in holding the core together, rather akin to the strong force which may be an observable embodiment of the same thing.
		Since the ejection is primarily a tangential process, whilst gravitational attraction is primarily radial, it follows that in the conditioning process, the final ejection trajectory is formed by a strong deceleration phase to align the graviton velocity with that of the general radially based field.
	www.praetor.clara.net /gravity.html (8622 words)

	Gravity
		The first mathematical formulation of the theory of gravitation was made by Isaac Newton and proved astonishingly accurate.
		Gravitational acceleration, and acceleration in general, is measured in metre per second squared or in galileoss or gees.
		Since Einstein discovered his theory of gravitation the gravity is not one of the fundamental forces of nature so it is a small wonder that it has not been fitted into the formalism of quantum mechanics (the three fundamental forces: Electromagnetism, the Strong Force, and the Weak Force, can be).
	www.brainyencyclopedia.com /encyclopedia/g/gr/gravity.html (3432 words)

	Newton's Law of Universal Gravitation
		This comparison led him to conclude that the force of gravitational attraction between the Earth and other objects is inversely proportional to the distance separating the earth's center from the object's center.
		This force of gravitational attraction is directly dependent upon the masses of both objects and inversely proportional to the square of the distance which separates their centers.
		Gravitational interactions do not simply exist between the earth and other objects; and not simply between the sun and other planets; gravitational interactions exist between all objects with an intensity which is directly proportional to the product of their masses.
	www.glenbrook.k12.il.us /gbssci/phys/Class/circles/u6l3c.html (1712 words)

	Gravity (Site not responding. Last check: 2007-10-26)
		Since the Newtonian deflection of the ray corresponds only to the time dilation, and it happens for certain reasons (for conservation of energy in gravitation) that the relative curvature of space must be exactly the same as the relative time dilation, the total deflection is twice as big as its Newtonian prediction.
		So it is not a regular gravitational redshift and so not the regular gravitational time dilation.
		Gravity is small unless at least one of the two bodies is large or one body is very dense and the other is close by, but the small gravitational force exerted by bodies of ordinary size can fairly easily be detected through experiments such as the Cavendish torsion bar experiment.
	www.sciencedaily.com /encyclopedia/gravity (3795 words)

	Potential Energy
		Gravitational potential energy is the energy stored in an object as the result of its vertical position (i.e., height).
		The gravitational potential energy of the massive ball of a demolition machines is dependent on two variables - the mass of the ball and the height to which it is raised.
		There is also a direct relation between gravitational potential energy and the height of an object; the higher that an object is elevated, the greater the gravitational potential energy.
	www.glenbrook.k12.il.us /gbssci/phys/Class/energy/u5l1b.html (1008 words)

	Gravitation and Gravity (Site not responding. Last check: 2007-10-26)
		Gravitation is the attractive force existing between any two objects that have mass.
		Since gravitational force is happening to all matter (objects) in the universe, from the largest galaxies down to the smallest atoms, it is often called universal gravitation.
		Sir Isaac Newton was the first to fully recognize that the force holding any object to the earth is the same as the force holding the moon, the planets, and other heavenly bodies in their orbits.
	alex.edfac.usyd.edu.au /methods/science/studentwork/MassoftheEarth/gravitationandgravity.htm (471 words)

	Gravitational attraction
		Calculate the gravitational attraction between two identical lead spheres each of mass 10 kg if their centres are 0.2 m apart.
		Calculate the gravitational attraction between them if a piece of Earth equal to the mass of the Moon were transferred to the Moon.
		This break-up will occur when the gravitational attraction of a planet on a fragment of its satellite is greater than the gravitational attraction of the satellite on that fragment.
	www.emanuel.org.uk /curriculum/science/physics/website/alevel/aprobs/gravity/grav1.htm (866 words)

	MSN Encarta - Tide
		Tide, periodic rise and fall of all ocean waters, including those of open sea, gulfs, and bays, resulting from the gravitational attraction of the moon and the sun upon the water and upon the earth itself.
		Because the force of gravity decreases with distance, the moon exerts a stronger gravitational pull on the side of the earth that is closer to it and a weaker pull on the side farther from it.
		The earth does not respond to this variation in strength because the planet is rigid—instead, it moves in response to the average of the moon’s gravitational attraction.
	encarta.msn.com /encyclopedia_761561041/Tide.html (1080 words)

	Lunar Tides
		But this gravitational attraction of the Moon is not limited to the water molecules; in fact, the Moon exerts a gravitational force on every object on and in the Earth.
		The gravitational attraction of the Moon produces two tidal bulges on opposite sides of the Earth.
		The liquid at point A is closer to the Moon and experiences a larger gravitational force than the Earth at point B or the ocean at point C. Because it experiences a larger attraction, it is pulled away from the Earth, toward the Moon, thus producing the bulge on the right side.
	csep10.phys.utk.edu /astr161/lect/time/tides.html (767 words)

	Bending Spacetime in the Basement
		When measuring the gravitational constant one must precisely calibrate the torsional strength of the fibre, but to simply observe gravitation we need only make sure the fibre is sufficiently limp to allow the gravitational force to overcome its resistance to twisting.
		Since attraction is linear by mass but inverse square in distance, you're better off with a modest mass of high-density material than a large mass of a substance with lesser density.
		Using the gravitational force calculator earlier in this document, we can compute the gravitational attraction between the 338 gram mass at the end of the balance beam and the 740 gram test mass at the 14 cm distance when the beam is at the midpoint between the masses to be 0.000085 dynes.
	www.fourmilab.ch /gravitation/foobar (5823 words)

	Ride the Tide
		Tides are the periodic variations in sea level caused by the gravitational attraction of the sun and the moon on the Earth.
		Because of the gravitational attraction of the moon, the ocean on the side of the Earth facing the moon bulges outwards.
		As shown in the figure, the attraction of the gravitational forces on Point C is not as strong as the forces on A and B. Thus, this water gets left behind, so to speak.
	powayusd.sdcoe.k12.ca.us /teachers/rsaxton/tides.htm (2647 words)

	earth - Article and Reference from OnPedia.com (Site not responding. Last check: 2007-10-26)
		The planet's internal heat was originally generated during its accretion (see gravitational binding energy), and since then additional heat has continued to be generated by the decay of radioactive elements such as uranium, thorium, and potassium.
		These motions are caused by the differential attraction of Sun and Moon on the equatorial bulge due to the Earth's oblateness.
		The gravitational attraction between the Earth and Moon cause the tides on Earth.
	www.onpedia.com /encyclopedia/earth (3424 words)

	Science / Why Gravitational Biology? / Gravity Basics (Site not responding. Last check: 2007-10-26)
		It is the attraction that exists between all objects.
		The gravitational formula states that the force of gravity is proportional to the product of the two masses, and inversely proportional to the square of the distance between their centers of mass.
		There is a gravitational attraction between two apples, for instance, but the force between each apple and the Earth is so much greater, that the force between the two apples is not noticeable.
	brp.arc.nasa.gov /Science/Y_GBL/bsc_resrch.html (1294 words)

	The Myth of Gravitational Attraction
		The gravitational attraction of a single proton does not just attract one electron, but rather all electrons and all other protons in the entire universe.
		This gravitational attraction between all particles of matter is continuous and unbroken.
		Both gravitational attraction, proposed by Newton, and “curved” space, used by Einstein to explain this attraction, are such totally preposterous concepts that it is difficult to understand how they were able to gain any kind of acceptance in the scientific community.
	www.circlon-theory.com /HTML/mythofgravattr.html (523 words)

	Paradoxes Resolved, Origins Illuminated - Gravitational Attraction
		This is also the speed of "gravitational waves", which have never been detected in the solar system, directly or indirectly, and which have nothing to do with gravitational force.
		There are several arguments against this, but the simplest is that the reason why delayed propagation causes orbits to spiral outward is that a delayed force is non-central.
		This is explained in "Possible new properties of gravity", and explains why the character of the law of gravity seems to change for large-scale structures.
	www.metaresearch.org /msgboard/topic.asp?TOPIC_ID=12&whichpage=2 (4457 words)

	Elements of Music - Page 36
		The chord with the third greatest stability and "gravitational attraction" is the fourth scale degree Ð the subdominant chord (IV).
		The primary level of harmonic gravitational attraction is the attraction to the tonic chord.
		Observe: (1) the triad quality of these three triads is major in the major scale, (2) these three chords contain all of the notes of the scale of their tonality, (3) the central gravitational attraction to the tonal center is established by the root of these three primary triads.
	trumpet.sdsu.edu /m151/Elements_of_Music4h.html (460 words)

	Howstuffworks "How much does planet Earth weigh?"
		The measurement of the planet's weight is derived from the gravitational attraction that the Earth has for objects near it.
		The attraction is extremely slight, but if your instruments are sensitive enough you can measure the gravitational attraction that two bowling balls have on one another.
		The same is true for two golf balls, but the attraction is even slighter because the amount of gravitational force depends on mass of the objects.
	www.howstuffworks.com /question30.htm (417 words)

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