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AP Physics Practice Test: Impulse, Momentum
AP Physics Practice Test: Impulse, Momentum

... is affixed to the end of the spring and allowed to slowly slide down the plane until it is resting in an equilibrium position. The dimensions of the masses in this problem are insignificant. Give answers to all questions in terms of stated variables and fundamental constants. a. Draw a free-body dia ...
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... particle can be formulated in either equivalent form, or in either ‘‘representation.’’ If the form C(x, t) is used, it is said to be in the ‘‘Schrödinger representation,’’ in honor of one of the founders of quantum mechanics. If the form C(px, t) is used, it is in the ‘‘momentum representation.’’ T ...
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... particle can be formulated in either equivalent form, or in either ‘‘representation.’’ If the form C(x, t) is used, it is said to be in the ‘‘Schrödinger representation,’’ in honor of one of the founders of quantum mechanics. If the form C(px, t) is used, it is in the ‘‘momentum representation.’’ T ...
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... which is fulfilled by all cluster and particle emission processes 2) CSM is able to decribe energy levels and B(E2)-values in vibrational, transitional and rotational even-even nuclei in terms of the deformation parameter d. 3) CSM describes α-transitions to excited states these nuclei by using an u ...
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Slide presentation from lecture

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sy16_oct26_f11a
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< 1 ... 170 171 172 173 174 175 176 177 178 ... 788 >

Atomic theory



In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.
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