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Topic: Liquid drop model


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  Patz Model 9000 Liquid Transfer System
Liquids drop through the screen into the sump that is installed below the floor of the gutter.
The submersible pump moves the liquid through a 2-inch PVC pipe to a discharge point at the end of the slide into your manure spreader.
Liquids drop through the screen into the sump.
www.patzag.com /products/ag-line/manure-handling-equipment/manure-pumps/9000   (499 words)

  
 Liquid Drop Model of Nucleus
A liquid drop model of the nucleus would take into account the fact that the forces on the nucleons on the surface is different from those on nucleons on the interior where they are completely surrounded by other attracting nucleons.
The volume of the liquid drop is proportional to the mass number A, and the surface would then be proportional to the two-thirds power of A. The first step toward a liquid drop model of the nucleus would then be to postulate a volume term and a surface term in the form:
In the liquid drop model, this is included by using the even-odd nucleus as a reference and adding a correction term which is positive for even-even nuclei and negative for odd-odd nuclei.
hyperphysics.phy-astr.gsu.edu /hbase/nuclear/liqdrop.html   (443 words)

  
 The Liquid-Drop Model of Fission
In the liquid drop model of the nucleus, formulated by Niels Bohr, the nucleons are imagined to interact strongly with each other, just like molecules in a drop of liquid.
On this basis the normal modes of vibration of a liquid drop may represent the states of excitation of the nucleus.
In this scenario, the drop will try to minimize its surface at all deformations, and the spherical shape will be stable for every distortion up to a limit where the drop is broken into two spheres, and the two spheres are moved apart, just out of the range of the surface forces.
dwb.unl.edu /Teacher/NSF/C03/C03Links/scijou.eou.edu/scijou98/node167.html   (762 words)

  
 Nuclear Models
Two models of the nucleus have proved useful: the liquid drop model and the independent particle model.
In the liquid drop model, formulated by Niels Bohr, the nucleons are imagined to interact strongly with each other, like the molecules in a drop of liquid.
The liquid drop model permits us to correlate many facts about nuclear masses and binding energies; it is useful in explaining nuclear fission.
library.thinkquest.org /3471/nuclear_models_body.html   (1254 words)

  
  U.S. Patent: 5092064 - Liquid-drop model diagramatic indicator plate structure - March 3, 1992
A liquid drop device as claimed in claim 1 wherein the plurality of recesses are arranged on the surface plate such that, when each recess contains a small amount of the second liquid, the totality of recesses define with the different color a pattern or message.
A liquid drop device as claimed in claim 6 wherein the plurality of recesses on each surface of the surface plate are differently arranged such that the plurality of recesses on each side form different patterns or shapes.
For instance, the structure of this invention is to add in the color liquid with dropping model to enable its flowing on the sliding surface plate thoroughly and evenly and to retain certain portions of color liquid in the multiple tiny holes pre-set on the surface plate.
www.everypatent.com /comp/pat5092064.html   (1414 words)

  
  NationMaster - Encyclopedia: Liquid drop model
The liquid drop model is a model in nuclear physics which treats the nucleus as a drop of incompressible nuclear fluid, first proposed by George Gamow.
A liquid drop model of the nucleus would take into account the fact that the forces on the nucleons on the surface is different from those on nucleons on the interior where they are completely surrounded by other attracting nucleons.
In the liquid drop model, this is included by using the even-odd nucleus as a reference and adding a correction term which is positive for even-even nuclei and negative for odd-odd nuclei.
www.nationmaster.com /encyclopedia/Liquid-drop-model   (1118 words)

  
 NationMaster - Encyclopedia: Interacting boson model
The Interacting Boson Model (IBM) is a model in nuclear physics Nuclear physics is the branch of physics concerned with the nucleus of the atom.
Liquid drop model The liquid drop model is a model in nuclear physics which treats the nucleus as a drop of incompressible nuclear fluid, first proposed by George Gamow.
Shell model In the nuclear physics, the nuclear shell model is a model of the atomic nucleus.
www.nationmaster.com /encyclopedia/Interacting-boson-model   (280 words)

  
 Models in Science (Stanford Encyclopedia of Philosophy)
The billiard ball model of a gas, the Bohr model of the atom, the double helix model of DNA, the scale model of a bridge, the Mundell-Fleming model of an open economy, or the Lorenz model of the atmosphere are well-known examples for models of this kind.
Weizsäcker's liquid drop model represents the nucleus of an atom in a manner very different from the shell model, and a scale model of the wing of an air plane represents the wing in a way that is different from how a mathematical model of its shape does.
Models of data play a crucial role in confirming theories because it is the model of data and not the often messy and complex raw data that we compare to a theoretical prediction.
plato.stanford.edu /entries/models-science   (9876 words)

  
 Surface Evolver Examples   (Site not responding. Last check: )
A liquid drop between a flat circular pad (green) and a sphere (red).
The tricky part of this example is handling the gaps between the straight edges of the liquid surface facets and the curved wall of the tank.
The Evolver model actually consists of two polyhedra in a unit cube, with the opposite faces identified in what is called the 'torus model'.
www.susqu.edu /brakke/evolver/examples/examples.htm   (904 words)

  
 Columbia Encyclopedia - nucleus - AOL Research & Learn
One model is based on the fact that certain properties of a nucleus are similar to those of a drop of incompressible liquid.
The liquid-drop model has been particularly successful in explaining details of the fission process and in evolving a formula for the mass of a particular nucleus as a function of its atomic number and mass number, the so-called semiempirical mass formula.
Another model is the Fermi gas model, which treats the nucleons as if they were particles of a gas restricted by the Pauli exclusion principle, which allows only two particles of opposite spin to occupy a particular energy level described by the quantum theory.
reference.aol.com /columbia/_a/nucleus/20051206232209990029   (1752 words)

  
 Alsos: The Origin of the Liquid-Drop Model and the Interpretation of Nuclear Fission
This essay discusses the historical and scientific basis of the two theories of the nucleus which led to the groundbreaking 1938 theory of nuclear fission by Lise Meitner and Otto Frisch.
The first theory, developed between 1928 and 1936, was pioneered by George Gamow, who suggested that the nucleus could be considered to be like a drop of liquid, with energy holding the subatomic particles together just as tension holds together liquid particles.
The second theory is Niels Bohr’s 1936 theory of the compound nucleus, which describes the way in which particles may be released from the nucleus or that the nucleus may be destroyed by raising the energy of a particle which strikes the nucleus.
alsos.wlu.edu /information.aspx?id=1736&search=Gamow,+George+   (192 words)

  
 Cluster Ion Thermodynamic Properties: The Liquid Drop Model Revisited
The liquid drop (LD) model is revisited to assess the reliability of its predictions for thermodynamic properties of cluster ions and to examine the rate of convergence of such properties to their bulk counterparts.
The LD model allows a natural partitioning of the cluster ion thermodynamic properties into various components, one of which (the solvation part) is of prime importance in connecting cluster solvation properties to the bulk limit.
The latter LD model component is found to be entirely analogous to the so-called dielectric sphere theory, and as implied in earlier work, the results of dielectric models suggest that ion solvation is also a very slow process to converge to the bulk limit.
pubs.acs.org /cgi-bin/abstract.cgi/jpcafh/1999/103/i15/abs/jp983550g.html   (348 words)

  
 NVSHistory   (Site not responding. Last check: )
Each model has proven useful in explaining certain phenomena, but clearly they are mutually contradictory in implying very different nuclear textures.
The assumption underlying the "independent" motion of nucleons in the shell model is that nucleons do not interact strongly with other nearby nucleons, but rather are influenced by the net effect of the nuclear potential well.
The liquid-drop model is based on a contrary assumption - that nucleons interact solely with nearest neighbors in the dense nuclear interior.
www.res.kutc.kansai-u.ac.jp /~cook/NVSHistory.html   (166 words)

  
 Patz Industrial 9000 Liquid Transfer System
Material passes over a screen with the help of a material mover.
The submersible pump moves the liquid through a 2-inch PVC pipe to a discharge point at the end of the slide into your truck or container.
The material mover takes the solids up the slide and discharges them into the container.
www.patzindustrial.com /products/industrial/pumps/9000   (279 words)

  
 OCI Instruments, Inc - Pressure and Temperature Sensitive Instruments
Model 50 - Process and Industrial Gauge: Application: For neutral media such as air, water, steam, oil and other inert liquids and gases compatible with brass and bronze on medium to heavy duty industrial service in.
Model TA - Test Gauge - All Stainless Steel: Application: For use in plants, workshops and in the field in those instances where enhanced readability and a geater degree of accuracy are required.
Model TC - Safety Test Gauge - All Stainless Steel: Application: For use in plants, workshops and in the field in those instances where enhanced readability and a greater degree of accuracy are required.
www.ociinstruments.com /catalog.htm   (620 words)

  
 Abstract: Nucl. Inst. and Meth. for Phys. Res. B173 (2001) 455-462   (Site not responding. Last check: )
The liquid drop model (LDM) was developed to perform radiation damage studies in metals in an ionic energy range where molecular dynamics cannot be used because of computational restraints.
In this work the model is extended in an effort to explain the observation of tracks in organic insulators in an energy range where other theoretical models fail.
Although the model still has free parameters and shows some discrepancies with experimental data, its agreement is better than that obtained through the consideration of other models.
www.tandar.cnea.gov.ar /actividades/2001/abstracts/NIM_B173_455.html   (185 words)

  
 Physics News Update
Among the team's observations: as flow rate increases, a phenomenon known as "period doubling" can occur, in which drops make a transition from falling at a single time interval (such as every 5 seconds) to two characteristic intervals (such as 4 s followed by 2 s).
On the heels of the new dripping model comes an experiment showing how to prevent drips from a ceiling.
Normally, the smallest disturbance to such a liquid layer creates unstable variations in thickness along the layer, which leads to dripping.
www.aip.org /pnu/2000/split/516-2.html   (226 words)

  
 Magic Numbers and the Pascal Triangle
A shell model is one in which the system is thought to consist of individual particles moving in bound orbitals in response to the remainder of the system.
The Liquid Drop Model of the nucleus (Niels Bohr, 1936) compares the nuclear forces to molecular forces acting in a liquid drop.
The Liquid Drop Model fails to explain the unusual properties associated with the magic number nuclei.
milan.milanovic.org /math/english/atom/proton.html   (886 words)

  
 2_1.4.html The Nuclear Force
The liquid drop model contains assumptions which approximate the true nature of the interactions within the nucleus, although it fails to predict many of the finer details of nuclear structure.
This model is an extension of the ideas behind the theory of atomic structure: that there are energy levels with vacancies to be filled, and that energetically stable states can be achieved as these shells are filled.
The shell model is successful at predicting the total nuclear angular momentum J. This vector is the sum of three contributors: 1) the intrinsic angular momentum (spin) of the protons; 2) the spin of the neutrons; and the orbital angular momentum from their position withing the nucleus.
www.med.harvard.edu /JPNM/physics/nmltd/radprin/sect2/2.1/2_1.4.html   (625 words)

  
 Bohr on the Liquid Drop Model of Fission
Due to the extreme importance of this discovery, I should be glad to add a few comments on the mechanism of the fission process from the point of view of the general ideas, developed in recent years, to account for the main features of the nuclear reactions hitherto observed.
In the case of ordinary reactions, in which the disintegration consists in the scope of a single particle, this conversion means the concentration of a large part of the energy on some particle at the surface of the nucleus, and resembles therefore the evaporation of a molecule from a liquid drop.
In the case of disintegrations comparable to the division of such a drop into two droplets, it is evidently necessary, however, that the quasi-thermal distribution of energy be largely converted into some special mode of vibration of the compound nucleus involving a considerable deformation of the nuclear surface.
dbhs.wvusd.k12.ca.us /webdocs/Chem-History/Bohr-Fission-1939.html   (511 words)

  
 The Liquid Drop Model
The Liquid Drop Model (LDM) assumes that the nucleus has properties similar to a liquid drop.
The main analogies were the well-defined surface and the short-range forces, one attractive force holding the nucleons together, and one repulsive force stopping the nucleons collapsing in.
The LDM also provides an expression for the binding energy of the nucleus, analogous to the surface tension of a liquid.
www.phys.jyu.fi /research/gamma/publications/akthesis/node4.html   (267 words)

  
 Theoretical Models
A goal of nuclear physics is to account for the properties of nuclei in terms of mathematical models of their structure and internal motion.
The Liquid Drop Model treats the nucleus as a liquid.
The Nuclear Shell Model is similar to the atomic model where electrons arrange themselves into shells around the nucleus.
www.lbl.gov /abc/wallchart/chapters/02/4.html   (610 words)

  
 [No title]
The single-particle level scheme is used to calculate the shell model and pairing corrections to the liquid drop energy in the Strutinsky approach.
The standard Liquid Drop Model expressions are adopted to calculate the smooth part of the total potential energy.
The use of the standard Liquid Drop Model expressions does not allow the the use of the code in calculations with nuclei far from the beta-stability line.
www.cpc.cs.qub.ac.uk /summaries/ADKF_v1_0.html   (436 words)

  
 Britannicaindia.com: Britannica Browse
It was used as early as 1860 for a portable fuel...
substance that blends the structures and properties of the normally disparate liquid and crystalline solid states.
electronic display device that operates by applying a varying electric voltage to a layer of liquid crystal, thereby inducing changes in its optical properties.
www.britannicaindia.com /britannica_browse/l/l24.html   (1697 words)

  
 Francesco Iachello
The most celebrated of these models is the Interacting Boson Model of the atomic nucleus, introduced in 1974 by Arima and Iachello, in which the fundamental constituents are correlated pairs of protons and neutrons treated as bosons [1].
This model, together with the Nuclear Shell Model and the Liquid Drop Model, forms the basis for the description of all nuclear phenomena.
One of the most important models which exploits the concept of supersymmetry is the Interacting Boson-Fermion Model of the nucleus, in which the fundamental constituents are correlated pairs (bosons) together with unpaired protons and neutrons (fermions).
www.yale.edu /physics/research/iachello.html   (631 words)

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