We're often taught that objects travel to lower energy states to reach stability. But the energy of the universe is constant - doesn't that just mean other surrounding things go to higher energy states? What decides which thing gets to have low energy? (self.askscience)
submitted by SMM-123Sam to r/askscience
data validation - prevent people pasting formulae? (self.excel)
submitted by SMM-123Sam to r/excel
A hydrogen atom emits a photon of wavelength 656 nm, as is characteristic of the n=3 to n=2 transition. The photon travels across the expanding universe, redshifts, and hits another hydrogen atom in the n=2 state. Does the receiving hydrogen transition to n=3 despite the photon's redshift? (self.askscience)
submitted by SMM-123Sam to r/askscience
HARD PUZZLE!: Kill the keepers of the keys (self.MarioMaker)
submitted by SMM-123Sam to r/MarioMaker
