physicsDefinition from Wiktionary, the free dictionary Jump to: navigation, searchFrom Wiktionary under the GNU Free Documentation License. Physics (Ancient Greek: φύσις physis "nature") is a natural science that involves the study of matter and its motion through space-time, as well as all applicable concepts, including energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves. Physics is one of the oldest academic disciplines, perhaps the oldest through its inclusion of astronomy. Over the last two millennia, physics had been considered synonymous with philosophy, chemistry, and certain branches of mathematics and biology, but during the Scientific Revolution in the 16th century, it emerged to become a unique modern science in its own right. However, in some subject areas such as in mathematical physics and quantum chemistry, the boundaries of physics remain difficult to distinguish. Physics is both significant and influential, in part because advances in its understanding have often translated into new technologies, but also because new ideas in physics often resonate with other sciences, mathematics, and philosophy. For example, advances in the understanding of electromagnetism or nuclear physics led directly to the development of new products which have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of motorized transport; and advances in mechanics inspired the development of calculus. From Wikipedia under the
GNU Free Documentation License PHySICS!!!!? Q. A particular horizontal turntable can be modeled as a uniform disk with a mass of 200 g and a radius of 20 cm that rotates without friction about a vertical axis passing through its center. The initial angular speed of the turntable is 2.4 rad/s. A ball of clay, with a mass of 80 g, is dropped from a height of 35 cm above the turntable. It hits the turntable at a distance of 10 cm from the center, and sticks where it hits so that the clay and the turntable rotate together at a new angular speed. Assuming the turntable is firmly supported by its axle so it remains horizontal at all times, find the final angular speed of the turntable-clay system. please explain how to do it!! Asked by yep - Mon Nov 26 16:15:04 2007 - - 2 Answers - 0 Comments A. This is a conservation of angular momentum question. Wbefore = angular speed before clay Wafter = angular speed after clay Jbefore = angular momentum before clay Jafter = angular momentum after clay Id = moment of inertia of disc Ic = moment of inertia of clay Rd = radius of disc Rc = radius of disc Md = mass of disc Mc = mass of clay Assuming no frictional losses anywhere in the system and a point mass of clay: Id = (1/2)(Md)(Rd)^2 (from definition of moment of intertia of a solid disc) Id = (1/2)(0.2 kg)(0.2 mt)^2 (converting to kilograms and meters because I can't think in any other units) Id = 0.004 kg-mt^2 Ic = (Mc)(Rc)^2 (from definition of moment of inertia of a point mass about a center point) Ic = (0.08 kg)(0.10 mt)^2 Ic = [cont.] Answered by FJSL - Mon Nov 26 19:05:06 2007 What professional careers involve both architecture and physics? Q. I am currently a physics major in my second year of college and I only recently discovered that I also have a strong interest in architecture. Is there some sort of professional career in the architecture field (maybe structural planning or something?) that will allow me to synthesize my love of physics and eventual physics degree with my newfound appreciation of architecture? Asked by colin - Sun Apr 4 06:18:55 2010 - - 2 Answers - 0 Comments A. As far as I'm aware, Civil Engineering combines physics and architecture, but whether or not a physics degree will gain you entry into this field I do not know. Answered by Chimpan V - Sun Apr 4 06:20:42 2010 Help with my physics course work, how does length affect the resistance of a wire?
Q. I have done a piece of course work for physics, which is titled how does length affect the resistance of wire? i have done the aim, method, collection of data, conclusion etc now i need to do the evaluation, i have already commented on how i collected data safely, and the limitations. i have also wrote improvements. on my help sheet it says; note the presence or absence of results that are beyond the range of experimental error idk what that means! help :S note the presence or absence of results that are beyond the range of experimental error<< A. When you do an experiment there is always some chance of error. Your ohm-meter cannot be 100% accurate. Perhaps it is very accurate, and has an inaccuracy of 0.01 % but it will never be perfect. There are all sorts of tiny variables, like the heat of the meter leads and the resistance of the wire in them. And so, whatever experiments you do will give you imperfect results. So if I measure what I think will be a 100 ohm resistor and get 99.9, I will probably be satisfied. I would feel that my results were within the range of experimental error: my 'set up' was anyway not more accurate than that. If, however, I got one reading that said that it was a 32 ohm resistor, I would know that that was not just 'experimental error', not just a… [cont.] Answered by Midatlantian - Sat Jul 11 15:53:12 2009 From Yahoo Answer Search: "physics" Physics is the science of the natural world, which deals with the fundamental particles the universe is made of, the interactions between them, and the interactions of objects composed of them (nuclei, atoms, molecules, etc). ContentsSourced
From Wikiquote under the GNU Free Documentation License.  english.ruvr.ru Mon, 30 Aug 2010 14:05:30 GMT+00:00 The Voice of Russia Iran will have the first nuclear fusion research reactor by 2020, the head of Iran's Plasma Physics and Nuclear Fusion Research Center Asghar Sedigh-Zadeh ... Iran to build first indigenous nuclear fusion research reactor by 2020 isna iran to develop first fusion research reactor by 2020 RIA Novosti A united Iran against a collapsing Israel Pakistan Daily Mail  redorbit.com Sat, 28 Aug 2010 11:32:53 GMT+00:00 RedOrbit In addition, through its Global Physics Solutions subsidiary, the Company provides therapeutic and diagnostic physics services and educational services to ...  physorg.com Mon, 30 Aug 2010 11:30:09 GMT+00:00 PhysOrg.com Sanguinetti is interested in how differences between what happens in the quantum world and what happens in the world of classical physics can be used to ... From Google News Search: "physics"  he.courses-careers.com 129px x 200px | 6.10kB [source page] from over 50 000 in 1990 to less than 40 000 in 2000 So I ask you why not consider studying it at university Physics provides  physics.library.wisc.edu 421px x 600px | 840.40kB [source page] Map Click map to go to an interactive campus map A map of this and other campus libraries can be found at the campus libraries map page From Yahoo Image Search: "physics"  gamedev.net unknown Mon, 06 Sep 2010 17:07:38 GM I am worried about implementing gravity with a center of mass for the cars involving basic . physics. so they dont glide when half on a cliff and I do not want to use third party API's. Any recommended places to go? ... From Google Blog Search: "physics"  nanohub.org Thu, 18 Sep 2008 12:32:39 PDT Raman's momentous discovery in 1928 that the spectral analysis of the light scattered by matter, illuminated with monochromatic light of ... nanohub.org.  sciencestage.com Sat, 12 Sep 2009 15:25:25 PDT at the time. Bringing together the research of Western medicine, neuroscience and physics with the insights of Ayurvedic theory, he explains that ... sciencestage.com.  youtube.com Tue, 16 Dec 2008 21:28:06 PST Lecture Series on Quantum Physics by Prof.V.Balakrishnan, Department of Physics, IIT Madras. For more details on NPTEL visit nptel.iitm.ac.in. youtube.com. From Google Video Search: "physics" |
