background preloader

Theoretical physics

Theoretical physics is a branch of physics which employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimental tools to probe these phenomena. The advancement of science depends in general on the interplay between experimental studies and theory. In some cases, theoretical physics adheres to standards of mathematical rigor while giving little weight to experiments and observations.[a] For example, while developing special relativity, Albert Einstein was concerned with the Lorentz transformation which left Maxwell's equations invariant, but was apparently uninterested in the Michelson–Morley experiment on Earth's drift through a luminiferous ether.[citation needed] On the other hand, Einstein was awarded the Nobel Prize for explaining the photoelectric effect, previously an experimental result lacking a theoretical formulation. Overview History Examples

http://en.wikipedia.org/wiki/Theoretical_physics

Related:  The Theory of Everything - Hawking

Hans Thirring Hans Thirring (March 23, 1888 – March 22, 1976) was an Austrian theoretical physicist, professor, and father of the physicist Walter Thirring. He won the Haitinger Prize of the Austrian Academy of Sciences in 1920.[1] Together with the mathematician Josef Lense, he is known for the prediction of the Lense–Thirring frame dragging effect of general relativity in 1918.[2][3][4] He received a deferment during World War I because he had broken one of his feet while skiing. He was a leading pacifist before the Anschluss and after World War II. But he could not save his older son, who was declared missing in action during the final two months of World War II.

Second death The second death is an eschatological concept in Judaism and Christianity related to punishment after a first, natural, death. Judaism[edit] Although the term is not found in the Hebrew Bible, Sysling in his study (1996) of Teḥiyyat ha-metim (Hebrew; "resurrection of the dead") in the Palestinian Targums identifies a consistent usage of the term "second death" in texts of the Second Temple period and early Rabbinical writings. Complex logarithm In complex analysis, a complex logarithm function is an "inverse" of the complex exponential function, just as the real natural logarithm ln x is the inverse of the real exponential function ex. Thus, a logarithm of a complex number z is a complex number w such that ew = z.[1] The notation for such a w is ln z or log z. Since every nonzero complex number z has infinitely many logarithms,[1] care is required to give such notation an unambiguous meaning.

Frame-dragging In 2015, new general-relativistic extensions of Newtonian rotation laws were formulated to describe geometric dragging of frames which incorporates a newly discovered antidragging effect.[4] Effects Rotational frame-dragging (the Lense–Thirring effect) appears in the general principle of relativity and similar theories in the vicinity of rotating massive objects. Under the Lense–Thirring effect, the frame of reference in which a clock ticks the fastest is one which is revolving around the object as viewed by a distant observer. Old Earth creationism Old Earth creationism is an umbrella term for a number of types of creationism, including gap creationism, progressive creationism, and evolutionary creationism.[1] Old Earth creationism is typically more compatible with mainstream scientific thought on the issues of physics, chemistry, geology and the age of the Earth, in comparison to young Earth creationism.[2] Types of old Earth creationism[edit] Gap creationism[edit] Gap creationism states that life was immediately and recently created on a pre-existing old Earth. One variant rests on a rendering of Genesis 1:1-2 as: "In the beginning ... the earth was formless and void."

Abstract algebra The permutations of Rubik's Cube have a group structure; the group is a fundamental concept within abstract algebra. History[edit] As in other parts of mathematics, concrete problems and examples have played important roles in the development of abstract algebra. Lense–Thirring precession In general relativity, Lense–Thirring precession or the Lense–Thirring effect (named after Josef Lense and Hans Thirring) is a relativistic correction to the precession of a gyroscope near a large rotating mass such as the Earth. It is a gravitomagnetic frame-dragging effect. It is a prediction of general relativity consisting of secular precessions of the longitude of the ascending node and the argument of pericenter of a test particle freely orbiting a central spinning mass endowed with angular momentum

Young Earth creationism Young Earth Creationism (YEC) is the religious belief[1] that the Universe, Earth and all life on Earth were created by direct acts of the Abrahamic God during a relatively short period, between 5,700 and 10,000 years ago.[2] Its primary adherents are those Christians and Jews[3] who, using a literal interpretation of the Genesis creation narrative as a basis, believe that God created the Earth in six 24-hour days.[4][5] Young Earth Creationists differ from other creationists in that they believe in a strict-literal interpretation of the Bible regarding the age of the Earth. This contrasts with Old Earth Creationists, who believe that the Book of Genesis may be interpreted metaphorically and who accept the scientifically determined age of Earth and the universe.[6] Since the mid-20th century, young Earth Creationists starting with Henry M.

Full Report On 60+ Anticancer Herbs Please Share This Page: List Of 60+ Anti-Cancer Herbs image to repin / shareBackground pic © Jag_cz - Fotolia.com Introduction The subject of anticancer herbs is certainly a controversial one. Coulomb's law Fundamental physical law of electromagnetism Coulomb's law, or Coulomb's inverse-square law, is an experimental law[1] of physics that quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force[2] or Coulomb force.[3] The quantity of electrostatic force between stationary charges is always described by Coulomb's law.[4] The law was first published in 1785 by French physicist Charles-Augustin de Coulomb, and was essential to the development of the theory of electromagnetism, maybe even its starting point,[5] because it was now possible to discuss quantity of electric charge in a meaningful way.[6] where ke is Coulomb's constant (ke ≈ 9×109 N⋅m2⋅C−2),[7] q1 and q2 are the signed magnitudes of the charges, and the scalar r is the distance between the charges.

Creation of man from clay Fashioning a man out of clay According to Genesis 2:7 "And the Lord God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul."According to the Qur'an[23:12–15], God created man from clay.According to greek mythology (see Hesiod's poem Theogeny), Prometheus created man from clay, while Athena breathed life into them.According to Chinese mythology (see Chu Ci and Imperial Readings of the Taiping Era), Nüwa molded figures from the yellow earth, giving them life and the ability to bear children.According to Egyptian mythology the god Khnum creates human children from clay before placing them into their mother's womb. انا خلقنا الانسان من صلصال من حمإ مسنون reference from sour at alhijer holy Quran

The definitive glossary of hacking terminology We live in an era of unprecedented cyberattacks, where malicious campaigns, both personal and governmental, are carried out across laptops and wireless networks. Even if you are not technically minded, your day-to-day life is still probably pretty crowded with stories about hacking, whether you recognize them as such or not. Have you ever installed an antivirus tool on your computer?

Related: