Sapling #4

[Maddie Turk Disc 2J]

Hi,
I was able to find the work function easily, but how do you find the maximum number of electrons ejected? The first part was "When a metal was exposed to photons at a frequency of 1.47×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.30×10−19 J." My work function came out to 6.44022×10−19
The second part asks, "What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 3.89×10−7 J?" Please help explain how to solve this!!

[Nathaly Cruz 2D]

Hi,
I was able to find the work function easily, but how do you find the maximum number of electrons ejected? The first part was "When a metal was exposed to photons at a frequency of 1.47×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.30×10−19 J." My work function came out to 6.44022×10−19
The second part asks, "What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 3.89×10−7 J?" Please help explain how to solve this!!

For the second part, you want to use the equation:

work function x electrons = total energy

for you, it would be 6.44022x10^-19 x electrons = 3.89x10^-7

Then, just solve for electrons, so it would be electrons = (3.89x10^-7)/(6.44022x10^-19)

Hope this helps :)

[Maddie Turk Disc 2J]

Hi,
I was able to find the work function easily, but how do you find the maximum number of electrons ejected? The first part was "When a metal was exposed to photons at a frequency of 1.47×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.30×10−19 J." My work function came out to 6.44022×10−19
The second part asks, "What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 3.89×10−7 J?" Please help explain how to solve this!!

For the second part, you want to use the equation:

work function x electrons = total energy

for you, it would be 6.44022x10^-19 x electrons = 3.89x10^-7

Then, just solve for electrons, so it would be electrons = (3.89x10^-7)/(6.44022x10^-19)

Hope this helps :)

Thank you so much!! This helps a lot! Is (work functions x electrons = total energy) a specific equation? By that I mean does it have a specific name?