Achieve 6

[Daniel N]

How do I calculate the work function after I find the E?

[Devyn Chun 3I]

For achieve question 6, the max kinetic energy is already given to you. So to find the work function, we need to use this equation: E = hv - (work function) where E is the max kinetic energy, h is Planck's constant, and v is the frequency. We plug in max kinetic energy (given) and set it equal to Planck's constant (6.626x10^-34) times the given photon frequency (given). Once we do that, we can solve for the work function. We will subtract our max kinetic energy from our multiplied values and move the work function to the other side of the equation to get our answer.

[Uma Patil 2A]

I just refer to this equation: E (energy of photon) - work function (energy needed to eject an electron) = KE(kinetic energy of ejected electron). We are given the KE in the question, and you have calculated E, so you can plug both of those values into the above equation to find the work function.

[Iman Gauhar 3E]

You can use the frequency given in the question to find the energy of the photon. Then, use the equation work function = energy of photon - KE. Subtract the kinetic energy given in the question from the energy of the photon that you previously calculated to get the answer.

[Sabira Mohammed 3I]

Hi, you would just subtract the kinetic energy from E photon.

[William Huang 1K]

Since the work function is taken off from the energy of the photon to equal KE, just subtract the KE from the energy of the photon to find the work function.

[Daniel N]

For achieve question 6, the max kinetic energy is already given to you. So to find the work function, we need to use this equation: E = hv - (work function) where E is the max kinetic energy, h is Planck's constant, and v is the frequency. We plug in max kinetic energy (given) and set it equal to Planck's constant (6.626x10^-34) times the given photon frequency (given). Once we do that, we can solve for the work function. We will subtract our max kinetic energy from our multiplied values and move the work function to the other side of the equation to get our answer.

Thank you. This was very helpful.

[Claire Kim 1F]

How do I calculate the work function after I find the E?

For this question I believe that E = (work function) + KE. Knowing this, given the KE, and solving E, you should plug them into the stated equation to calculate the work function.

[LaurenAkason2A]

Hi! I just remember that it's KE= hv (or energy) - work function. From there, you would be able to substitute the values in that you have to find the work function.

[HannahArabi14a]

I used the equation work function = h x frequency (which is your already found energy) - the kinetic energy (maximum kinetic energy listed in the problem). Using this equation you will be able to find the work function.

Hope this helps!