The formula is simple.
Kinetic energy = Photon energy - Binding energy
In some places, binding energy is also called work function.
So, Photon energy =
=
(Here we multiply lambda by 10^(-9) to change nm to m)
=
J
Change it to ev from Joule (J)
so, Photon energy =
J =
= 7.8 eV
Now, KE = 7.8 - 3.31 = 4.57 eV
Done !!!
Answer:
The sky looks different in each nighttime section of the artifact because the artifact sections represent different seasons. ... Different constellations are visible on different nights throughout the year because of the earth's orbit. The Earth orbits around the sun. A full orbit is 365 days or one year.
Explanation:
The ratios would remain the same for both elements, so it would be 1.5 times the mass of sodium in 100 grams.
1.5 * 39.34 grams Na = 59.01 grams Na
The fourth most abundant element in terms of mass is Carbon.
The first, second, and third most abundant element in terms of mass are Hydrogen, Helium, and Oxygen, respectively.
Hope this helps~