What is the Dark energy?
So what is dark energy? Well, the simple answer is that we don t know. It seems to contradict many of our understandings about the way the universe works. We all know that light waves, also called radiation, carry energy. You feel that energy the moment you step outside on a hot summer day. Einstein…
Gravitational attraction between Earth and Moon
Gravity or gravitational forces are forces of attraction. We re not talking about finding someone really cute and adorable. It s like the Earth pulling on you and keeping you on the ground. That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force…
Scientific Meaning of law
Definitions of Fact, Theory, and Law in Scientific Work Science uses specialized terms that have different meanings than everyday usage. These definitions correspond to the way scientists typically use these terms in the context of their work. Note, especially, that the meaning of “theory” in science…
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Gravitational force planets
Gravity is a natural occurrence in which physical objects are attracted toward one another. This attraction is proportional to the objects’ masses. Since the mass of each planet is different, the gravitational pull on an object will be different on each planet as well. Hence, an individual’s weight would…
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Universal Gravitation Definition
An artist s rendering of some of the forces of the universe. The apple falling is of course from the story of Isaac Newton discovering the law of gravity as an apple fell from a tree he was sitting underneath. Windows to the Universe original image Related links: Gravity is one of the universal forces…
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What causes gravitational pull?
Editor s Note: We asked several scientists from various fields what they thought were the greatest mysteries today, and then we added a few that were on our minds, too. This article is one of 15 in LiveScience s Greatest Mysteries series running each weekday. In the deepest depths of space, gravity…
Equations for gravitational field
You told us how an almost churchlike atmosphere is pervading your desolate house now. And justifiably so, for unusual divine powers are at work in there. Besso to Einstein, The basis of Einstein s general theory of relativity is the audacious idea that not only do the metrical relations of spacetime deviate from perfect Euclidean flatness, but that the metric itself is a dynamical…
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Famous scientific laws
As long as we re talking about one of the greatest scientists who ever lived, let s move on to Newton s other famous laws. His three laws of motion form an essential component of modern physics. And like many scientific laws, they re rather elegant in their simplicity. The first of the three laws states an object in motion stays in motion unless acted upon by an outside force…
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