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If the frequency of ultraviolet light is 2.53 x 10 power of -7 plancks constant is 6.63 x 10 power of -34 and the work function is 3.6eV what is the maximum kinetic energy?
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∙ 15y ago
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Wiki User
∙ 15y ago
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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
Why do all photoelectrons not come with the same kinetic energy?
Some energy is lost in releasing the electrons from the nucleus. This energy is known as the work function, which relates to the threshold frequency. Therefore, the kinetic energy of the released photoelectron is equal to the photon energy minus the work function.
Why is it easier to determine the coefficient of kinetic friction if the object moves with a constant velocity?
if moving with constant velocity the only force to slow it down is kinetic friction; if it is accelerating velocity is not constant and an additional force is being applied.
How do kinetic watches function?
Kinetic watches like the Direct Drive from Seiko function by preserving power when a person is not actively moving. In other words, the watch is powered by movement or kinetic energy.
As mass decreases kinetic energy increases?
kinetic energy of object=1/2 (mv2 ) mass of that object remains constant through out the motion so K.E. remains constant.. if some how mass decreasing then by formula we can see that the kinetic energy will also decrease.
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
In the Photoelectric effect after the threshold frequency what effect does the increased frequency have on the photocurrent If you assume the Intensity of the source to be constant?
The increased frequency increases the kinetic energy of the single electron ejected. Remember that the incident light releases a single electron when the threashod frequency is reached
Why do all photoelectrons not come with the same kinetic energy?
Some energy is lost in releasing the electrons from the nucleus. This energy is known as the work function, which relates to the threshold frequency. Therefore, the kinetic energy of the released photoelectron is equal to the photon energy minus the work function.
How is energy in potential and kinetic conserved?
For any object, the summation of its potential and kinetic energies is constant.
Why is it easier to determine the coefficient of kinetic friction if the object moves with a constant velocity?
if moving with constant velocity the only force to slow it down is kinetic friction; if it is accelerating velocity is not constant and an additional force is being applied.
What happens to the kinetic energy when you increase the speed but keep the mass constant?
the speed will make the kinetic energy smaller.
How do kinetic watches function?
Kinetic watches like the Direct Drive from Seiko function by preserving power when a person is not actively moving. In other words, the watch is powered by movement or kinetic energy.
What does boltzmann constant represent?
Boltzmann's constant relates the average kinetic energy of particles in a gas with the temperature of the gas.
As mass decreases kinetic energy increases?
kinetic energy of object=1/2 (mv2 ) mass of that object remains constant through out the motion so K.E. remains constant.. if some how mass decreasing then by formula we can see that the kinetic energy will also decrease.
What happens to kinetic energy of gas particles as temperature decreases at a constant pressure?
kinetic energy increases with the increase in temperature is a postulate in kinetic molecular theory of matter.if the pressure is kept constant when temperature decreases the kinetic energy of the molecules decreases resulting in decrease in the volume of the gas. Charle's Law state's that For a given mass of dry gas at constant pressure ,volume is directionally proportional to temperature ie V~T
Does kinetic energy depend on mass when body is acted upon by a constant forceant?
No.
Driving in a straight line at a constant speed is what kind of energy?
kinetic energy?
