I Influence of electron's kinetic energy disspation during photoelectric emission

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The work function of a metal is influenced by its atomic structure and the binding energy of its outer electrons. Heavier alkali metals like potassium exhibit a low work function due to the weaker binding of their outer shell electrons. The discussion highlights the balance between the electromagnetic energy of the electrons and the dissipation of their kinetic energy during photoelectric emission. Ultimately, the properties of the metal's atoms play a crucial role in determining the work function. Understanding these factors is essential for applications in photoelectric devices.
Timothy S.
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What are the properties of a metal that determine its work function? What has a greater influence on its value: the electromagnetic energy of an electron (which is going to leave metal's volume because of photoelectric emission) and the atoms of the metal or the dissipation of electron's kinetic energy in the process of THIS electron leaving the volume of the metal?
 
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I think the heavier alkali metals, such as Potassium, have a low work function, which I imagine is due to the loose binding of the electron in the outer shell?
 
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After a PM exchange with the OP, this thread is reopened. Thanks for your patience.
 
Thread 'Why higher speeds need more power if backward force is the same?'

Thread 'Why higher speeds need more power if backward force is the same?'

Power = Force v Speed Power of my horse = 104kgx9.81m/s^2 x 0.732m/s = 1HP =746W Force/tension in rope stay the same if horse run at 0.73m/s or at 15m/s, so why then horse need to be more powerfull to pull at higher speed even if backward force at him(rope tension) stay the same? I understand that if I increase weight, it is hrader for horse to pull at higher speed because now is backward force increased, but don't understand why is harder to pull at higher speed if weight(backward force)...
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