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Jarod Kintz
Imma do both just in case.

a casual observer
Exactly! The edit function is there for a reason, so that we can improve other …

Serena Federer
What does this even mean????

Keyhero User
So, do you want to wear shoes years later?

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never stop learning

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Unknown - Simple physics
An electron is in the second energy level of a hydrogen atom. The atom absorbs a photon, which causes the electron to rise directly to the fifth energy level. Find the change in the Bohr radius of the electron's orbit and the frequency of the absorbed photon.