What Equations Calculate Kinetic Energy and Work Function in Physics?

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Homework Help Overview

The discussion revolves around understanding the concepts of kinetic energy and work function in the context of a physics problem involving Barium's frequency and cutoff potential. Participants are exploring the relevant equations and their applications to calculate maximum kinetic energy and threshold frequency.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the meaning of cutoff potential and its relation to the frequency provided. There is an inquiry into the appropriate equations to use, particularly whether the equation E=eV is applicable in this context.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the definitions and implications of the quantities involved. Some guidance has been offered regarding the relationship between cutoff potential and the emission of electrons, but no consensus has been reached on the specific equations to apply.

Contextual Notes

Participants express confusion regarding the definitions and relationships between the given quantities, indicating a need for further exploration of the underlying physics concepts.

raladin3d
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how to solve this problem? :( help

Hello, I have this questions which I am confused at, :( I can't figure out what equation to use to solve it :(

given that the frequency of Barium is 6.25X10^14 Hz and the cutoff Potential is 0.10V find the Max Kenitic Energy, threshold frequencie and work function

thanks a lot I would really appreciate the help :)
 
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Well start with the cut off potential, ask yourself, what exactly is this quantity?

If they said that the frequency of Ba is 6.25(1014)Hz, which frequency is this?
 


rock.freak667 said:
Well start with the cut off potential, ask yourself, what exactly is this quantity?

If they said that the frequency of Ba is 6.25(1014)Hz, which frequency is this?

asked myself, and couldn't answer it :(

Is it possible that I should use the equation E=eV ?
 


raladin3d said:
asked myself, and couldn't answer it :(

Is it possible that I should use the equation E=eV ?

Yes but do you know why you would use that equation?

Wouldn't the cut-off potential be the potential difference needed to stop the electrons from being emitted?
 

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