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it is only zeo at the state of rest .
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What is the difference between free electron theory and nearly free electron theory?
free electron model not take into account the potential neither the electron interaction. nearly free electron take into account the potential.J.C. Aguiar
How does energy remain constant during free fall?
Let's assume the object is falling down (this is only one case of free fall). Its speed increases, therefore, its kinetic energy increases. However, to compensate, the object loses energy of position - potential energy. The sum of the two, kinetic energy + potential energy, remains constant, as long as no other forces (other than gravity) act on the object.
What type of energy can travel trough empty space and travels in waves?
Electron free light.
When is energy negative?
Because of the laws of enthalpy and entropy, free energy is always increasing. However, in endothermic reactions, or chemical reactions that require energy to occur, net free energy is negative because the energy is "lost" to the environment as it is bonded in the reaction. Energy is often defined in reference to something else, and the sign of the energy is a function which direction is flowing. If energy (heat) flows from a system to the environment, the enthalpy change is negative (exothermic), whereas if energy flows from the environment to the system, the enthalpy change is positive (endothermic).
What is the difference between work function and threshold frequency?
The threshold frequency is the minimum frequency of radiation required to raise the potential energy of the most energetic electrons in a metal to zero, therefore giving the free electron (once emitted) a velocity of zero. The work function of a metal surface is the energy required to remove the most energetic electron from it. Each metal has a different work function, with the negative of this the maximum potential of the de-localised electrons in the metal. W=hf0 The formula: Kmax = hf - W (in Joules) gives the maximum kinetic energy of the electron. As h is Planck's constant, and f is the frequency provided to the metal (ie. frequency of the electromagnetic wave that had irradiated the metal), and W is the Work Function of the metal, if the frequency provided to the metal is the threshold frequency, then the electron has kinetic energy of zero. However, if more than the threshold frequency is provided, the electron will have a kinetic energy > 0. I hope that's explained okay! Bec
What is the difference between free electron theory and nearly free electron theory?
free electron model not take into account the potential neither the electron interaction. nearly free electron take into account the potential.J.C. Aguiar
In what way electrons quantized?
They have fixed energy values.
How does energy remain constant during free fall?
Let's assume the object is falling down (this is only one case of free fall). Its speed increases, therefore, its kinetic energy increases. However, to compensate, the object loses energy of position - potential energy. The sum of the two, kinetic energy + potential energy, remains constant, as long as no other forces (other than gravity) act on the object.
Why does aluminum conduct?
Because it has a free electron in the conduction energy band.
What is energy released on adding an electron to an isolated gas phase atom?
All electron shells represent an energy level - it doesn't matter if its the outermost shell or not. In order for there to be a release of energy the electron has to be coming from a higher energy state. The only energy state higher than the outer-most electron shell would be a free electron. The only way an electron becomes a free electron is that sufficient was provided to lift it from what-ever electron shell (energy level) it was previously in to escape velocity. The energy that it then releases in returning is then this exact same amount of energy.
Why does aluminum conduct electricity?
Because it has a free electron in the conduction energy band.
Which electron in oxygen have the higher energy those in the first energy level or those in the second?
The second level is associated with higher energy than the first is. Keep increasing the energy of an electron enough, and eventually it breaks free of the atom completely.
When do riders free-fall on a roller coaster?
Well in roller coasters there is potential and kinetic energy. So when the roller coaster is getting pulled up it is using kinetic energy while gaining potential energy. So the potential energy it gained is used while going down and not being pulled.
How do you add energy to electron?
It would be possible to add energy to an electron in numerous ways, expressed most simply using descriptions of interactions from the fundamental forces of physics. If you accelerate a free electron by applying an electric or magnetic field it can acquire kinetic energy - through interactions with the force carrier of the electromagnetic force, the photon. If you increase its energy level or shell in an atom, it would thereby again acquire potential energy; again this could be accomplished by interactions of the electromagnetic force, for example in its response to energy acquired by a interaction with a photon. It would also be possible to increase its gravitational potential energy by accelerating it away from a given mass - or increase its kinetic energy by allowing it to fall towards a mass. Elastic interactions with other particles can add kinetic energy to it, if you were to bounce another particle off it, or simply move the atom in which it was bound. This is not a complete list, there would be other ways to add energy to an electron, directly or indirectly.
Is Gibbs free energy constant?
In general Gibbs free energy is NOT constant. Gibbs free energy can be translated into chemical potential and differences in chemical potential are what drive changes - whether it be chemical reactions, phase changes, diffusion, osmosis, heat exchange or some other thermodynamic function.
What is the change of energy called as it moves between kinetic energy and potential energy and back again?
Look on wikapedia the free encyclopedia!
Amy is at basketball practice She is about to shoot a free throw When she releases the ball?
the ball will have kinetic energy and potential energy.
