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Topic: Potential well

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	Potential well - Wikipedia, the free encyclopedia
		Energy captured in a potential well is unable to convert to another type of energy (kinetic energy in the case of a gravitational potential well) because it is captured in the local minimum of a potential well.
		In quantum physics, potential energy may escape a potential well without added energy due to the probabilistic characteristics of quantum particles; in these cases a particle may be imagined to tunnel through the walls of a potential well.
		A potential hill is the opposite of a potential well, the region surrounding a local maximum.
	en.wikipedia.org /wiki/Potential_well (422 words)

	Particle in a box - Wikipedia, the free encyclopedia
		In physics, the particle in a box (also known as the infinite potential well or the infinite square well) is a very simple problem consisting of a single particle bouncing around inside of an immovable box, from which it cannot escape, and which loses no energy when it collides with the walls of the box.
		See also the Particle in a spherically symmetric potential where the case is treated of a particle in a spherical box, or the particle in a ring which shows the case for a particle in a 1D ring.
		This means that when the particle reaches one border of the well, it instantaneously disappears from this side to reappear on the opposite side, as if the well was some kind of torus.
	en.wikipedia.org /wiki/Particle_in_a_box (2293 words)

	Physics Tutoring: Electric Potential (Site not responding. Last check: 2007-10-05)
		The potential of the nucleus of an atom in a molecule.
		The concept of "volt" or "potential" in electricity is similar to the concept of "height" in gravity and the concept of "temperature" in thermodynamics.
		A: The concept of potential, V, in electricity is equivalent to the concept of "height"/"level"/"altitude", h, in the case of the gravitational field.
	www.slcc.edu /schools/hum_sci/physics/tutor/2220/e_potential (1682 words)

	Roller Coaster Potential (Site not responding. Last check: 2007-10-05)
		Potential energy curve with potential barrier illustrates electron-atom, atom-atom or ion-ion interactions.
		This is a one dimensional potential well model with a potential hill that can be used to represent several scenarios.
		The well shows the optimum separation for a stable molecule, but when the atoms approach, the interaction is initially repulsive.
	www.fas.harvard.edu /~scdiroff/lds/QuantumRelativity/RollerCoasterPotential/RollerCoasterPotential.html (275 words)

	Water Quality / (Site not responding. Last check: 2007-10-05)
		Well age is an important factor in predicting the likelihood of high nitrate concentrations in drinking water.
		Even well casing that is only 30 to 40 years old is subject to corrosion and perforation.If you have an older well, you may want to have it inspected by a qualified well driller.
		Wells that have not been used for more than five years or are in a state of disrepair, are required to be sealed (IC 25-39).
	www.ecn.purdue.edu /SafeWater/farmasyst/surveys/factsheets/farmassess1.htm (2064 words)

	Bound State Solutions to the Schroedinger Equation (Site not responding. Last check: 2007-10-05)
		With the mouse you can sketch a 1-D potential well and the applet will plot the corresponding energy level diagram and wave functions for the first 4 levels.
		Note that the spacing of the levels increases with increasing quantum state, as is the case for an infinitely deep well.
		As you narrow the well the energy levels increase, as suggested by the formula for the energy levels for an infinite well.
	bama.ua.edu /~jharrell/PH505/bound_states.htm (261 words)

	Spherical Potential Well (Site not responding. Last check: 2007-10-05)
		The idealized infinite-walled one-dimensional and three-dimensional square-well potentials can be solved by the Schrodinger equation to give quantized energy levels.
		For the case of a nucleus, a useful idealization is an infinite-walled spherical potential.
		That is, we model the nucleus with a potential which is zero inside the nuclear radius and infinite outside that radius.
	hyperphysics.phy-astr.gsu.edu /HBASE/nuclear/sphwel.html (124 words)

	Finite Square-Well Potential (Site not responding. Last check: 2007-10-05)
		With the finite potential, it is possible for the particle to be bound or unbound.
		Decrease the depth of the well to 200 units while keeping the bottom of the well at 0 units.
		Describe the effect of the well on unbound wave functions as the energy is decreased.
	webphysics.davidson.edu /faculty/dmb/SingleWells/Well2.html (431 words)

	Potential Well
		Motion in a central potential is demonstrated by a ball rolling on a circular 1/r curved surface.
		The 1/r potential well simulates the gravitational potential surrounding a point mass; a ball bearing moving in this potential follows a parabolic or elliptical orbit depending upon its initial trajectory and velocity.
		It is important to level the potential well, well.
	www.fas.harvard.edu /~scdiroff/lds/NewtonianMechanics/PotentialWell/PotentialWell.html (191 words)

	One-Dimensional Potential Energy Well (Site not responding. Last check: 2007-10-05)
		The simple pendulum is a system for which the potential energy of the system is symmetrical for displacements from equilibrium.
		In this state, the kinetic energy is zero and the total and potential energies are at a global minimum.
		All you need to know to predict the period of small oscillations of a mass m oscillating in a parabolic potential energy well is the effective spring constant k of the potential well.
	kossi.physics.hmc.edu /courses/P23A/Experiments/anharmonic.html (1786 words)

	Articles - Potential energy (Site not responding. Last check: 2007-10-05)
		Potential energy is stored energy due to position in an energy field.
		The factors that affect the amount of gravitational potential energy that is created are: the mass of the object, the distance that it is raised and the gravitational field strength.
		The electrical potential energy of an electrically charged object is defined as the work that must be done to move it from an infinite distance away to its present location, in the absence of any non-electrical forces on the object.
	www.sinoz.com /articles/Potential_energy (1513 words)

	Yukawa potential
		The square-well potential is often used as a crude approximation to the effective intermolecular potential in colloid-polymer mixtures.
		is a measure for the range of the attractive part of the potential [9,10,8,7].
		Although one cannot directly compare the width of a square-well and a Yukawa potential, the characteristic well widths are of comparable magnitude.
	www.science.uva.nl /~bolhuis/ths/pages/node31.html (672 words)

	Finite Square-Well Potential
		In exercise is designed to study the finite square well and to show the shooting method works.
		Although the finite square-well potential problem is more realistic then the infinite well, it is difficult to solve because it yields transcendental equations.
		The walls of the graph are hard, i.e., the potential at the walls is always infinite.
	webphysics.davidson.edu /physletprob/ch10_modern/finitewell.html (583 words)

	A Conversation with Samuel Hawkins (Site not responding. Last check: 2007-10-05)
		I think the answer has to be more than, "well, he's Super," or "well, he had really good parents." I had really good parents too, but I wouldn't have put up with what Clark did if I could have done something about it.
		After all, the pre-Crisis Superman isn't human, he doesn't fail (at least, not as often as the post-Crisis Superman), and his stories teach that humans are not innate failures.
		It's the toughest one there is. So basically I wanted to have Martha look back over life and tell her story, and I don't feel bad or sexist that when I was done it turned out that most of it involved her husband and son.
	theages.superman.ws /users/hawkins/interview-lives.php (3372 words)

	The Square Well
		W is total energy, E is the total energy of the particle inside the well, which is also equal to its kinetic energy.
		The oscillatory wave functions inside the well, where the kinetic energy is positive, have exponential tails outside the well, where the kinetic energy is negative.
		This theory also applies in three dimensions for a spherical potential well of radius a for states of zero angular momentum, since the radial problem is then a one-dimensional problem of the same nature that can be solved the same way (except for r = 0 to ∞).
	www.du.edu /~jcalvert/phys/sqwell.htm (2970 words)

	How To Live Up to Your Greatest Potential
		You will do well, because you will be doing what you really want to do and you will be determined to develop the full potential of your strengths.
		Develop your limited potentials as well as those that you feel are your assets.
		Well, just because you have a clear purpose, know what you want, are willing to work on developing your potential, and willing to be a nice person, success will not drop into your lap overnight.
	rbmilne.com /howto/HT04.htm (4832 words)

	Fusor and/or General Fusion Theory - why just one potential well?
		Unforunately the apparatus to create the potential well also blocks the paths of the ions, robbing energy from the system.
		Ions might initially go to one of the genetrating wells, but their orbits should be drawn towards the stronger, artifical one fairly rapidly.
		So long as they are caught by the 'artificail' well at a faster rate than lost to impacts from the generator apperatus,you should have a system with a significantly reduced loss due to non-productive impacts.
	fusor.net /board/view.php?site=fusor&bn=fusor_theory&key=1063587219 (271 words)

	2.2.2 Energy levels
		In this section we will present the details of two particular quantum systems: That of a particle in a one-dimensional potential well and that of an electron surrounding a proton as is the case in a hydrogen atom.
		The infinite well represents one of the simplest quantum mechanical problems: it consists of a particle in a well which is defined by a zero potential between x=0 and x=L
		The potential is due to the electrostatic force between the positively charged proton and the negatively charged electron.
	ece-www.colorado.edu /~bart/book/eband2.htm (631 words)

	[No title] (Site not responding. Last check: 2007-10-05)
		The resulting potential pattern must be in a special form: The low two bits of the value of the potential in each cell are encoded in CAM-B. Plane 2 (green) represents the XOR of these bits and plane 3 (blue) is the two's bit.
		The original potential must be continuous (at most a change of one between adjacent cells).
		The resulting pattern looks like overlaping bands and is easy to generate by modding out the potential by the appropriate interval.
	www.ai.mit.edu /projects/im/ftp/cam6/software/well.4th (151 words)

	Quantum Mechanical Potential Well
		The potential well applet allows the user to visualise the wavefunction of a particle as it passes over a potential well, shown in shaded grey, and to see the wavefunctions inside a well.
		This is due to the discrete values that the well width is fixed to.
		This is correct but when the well becomes less than 0.3Å in size this energy level pops off the top.
	www.abdn.ac.uk /physics/vpl/well (400 words)

	The Finite Potential Well (Site not responding. Last check: 2007-10-05)
		The finite potential well cannot contain the particle at all times.
		The particle can either get up over the top of the wall or there is a finite probability that the particle can exist in a non-classical region outside the potential well.
		The potential is larger than the depth of the well because of the probability that the particle can exist outside the well at a higher potential
	www.cord.edu /faculty/ulnessd/legacy/fall2000/hofferber/tsld003.htm (68 words)

	Britney Spears guide to semiconductor physics: finite barrier quantum well.
		Quatum wells are important in semiconductor lasers because they allow some degree of freedom in the design of the emitted wavelength through adjustment of the energy levels within the well by careful consideration of the well width.
		In the case where the mass of the particle in the barrier differs from the mass of the particle in the well, then we introduce a scaling factor to account for this.
		The energy levels in the well are found from the intersection of the tangent and cotangent relationships with the circle within the positive quarter.
	britneyspears.ac /physics/fbarr/fbarr.html (392 words)

	Potential wells and oscillations
		If the plot of V(x) versus x has a dip (a potential well), then at the bottom of that dip the slope will be zero, so dV(x)/dx = 0 at that point.
		At the bottom of a dip (or well), the curve will look at least approximately like that of a parabola centered on the point where dV/dx is zero.
		The first term, V(a), is just a constant and is unimportant since potential energy is defined with an arbitrary constant in it (the standard position).
	www.cbu.edu /~jholmes/P380/oscillations.html (507 words)

	Oil and Gas Well Drilling and Servicing eTool: General Servicing
		Working on an existing well to restore or increase oil and gas production is an important part of today's petroleum industry.
		A well that is not producing to its full potential may require service or workover.
		To begin the process, the wellhead must be removed from the casing flange.
	www.osha.gov /SLTC/etools/oilandgas/servicing/general_servicing.html (548 words)

	delta function potential
		For that matter the regular finite potential well has bound states that have exact energies (and therefore momenta) and yet the uncertainty in position seems to not be big enough to satisfy the HUP?
		Are these finite potential well bound states (stationary states) not realizable by particles.
		The uncertainty in the position of the particle is the amount of 'spread' in the probability distribution of the position.
	www.physicsforums.com /showthread.php?mode=hybrid&t=43643 (670 words)

	Unocal's Ling says Harvest deep shelf well discovers potential commercial gas resource 4/2/03
		Timothy H. Ling, Unocal president and chief operating officer, said the well was now being sidetracked to determine the extent of the reservoir and ultimate recoverable natural gas volumes.
		Later this year, the company expects to drill a delineation well to the northeast of the discovery well location.
		The addition of Harvest production would put the company well on its way to meeting or exceeding projections for production from the deep shelf program for the year, with the majority of the scheduled 2003 prospects yet to be drilled.
	www.unocal.com /uclnews/2003news/040203.htm (519 words)

	MOSFET Analytical Inversion Charge Model with Quantum Effects using a Triangular Potential Well Approximation
		The triangular potential approximation has been shown to be a good approximation for the charge density when the MOS device is in depletion or weak inversion.
		In this paper we continue to use the triangular potential to estimate the inversion charge, but we use asymptotic solutions of the Poisson equation for the MOS device at strong inversion.
		The electrostatic potential asymptotic expression is given in [3], which was improved in [4].
	www.nsti.org /BioNano2005/showabstract.html?absno=277 (215 words)

	RIGZONE - Rally Energy Cases Potential Gas Well in PEI
		Rally Energy Corp.'s Seaview #1 well, 18 km north of Kensington, on Prince Edward Island, has reached Total Depth of 1610 meters and is being cased as a potential gas well.
		The presence of gas in the well was confirmed by the gas detector while drilling.
		Additional seismic is planned during August to delineate exploration well locations for possible drilling in the fall of 2003.
	www.rigzone.com /news/article.asp?a_id=7439 (253 words)

	Potential Monitoring Well Donations Form
		I have an inactive well I would be willing to donate to the groundwater monitoring program.
		I am interested in providing a land easement to the County for the purpose of installing a long-term groundwater monitoring well.
		The county would like a commitment from the property owner that a donated well will be available and accessible for monitoring for as many years as possible.
	www.loudoun.gov /b&d/well/donateform.htm (115 words)

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