In black body radiation, there are two regions of low intensity. One is at the high frequencies and one is at the low frequencies. I understand that there is lower probability to emit radiation at high frequencies because it requires higher energy than the average thermal energy provided...
In this website, http://hyperphysics.phy-astr.gsu.edu/hbase/molecule/nacl.html , it says that it only takes 1.52 eV to create both ions. And when the two ions form come close to 0.94 nm, they have potential energy of -1.52 eV. Then is says that if the two neutral atoms come closer than 0.94 nm...
Homework Statement
I understand the concept of negative potential energy value because it's chosen to be 0 at infinity. So considering two positive charges, as separation r increases, the potential energy V decreases.
When there's one positive and negative charge, as r increases, V...
Homework Statement
The questions are about binary star system.
Homework Equations
Why the two stars in a binary star system are always diametrically opposite positions?
Why the two stars have common period?
Why the inner star is more massive?
The Attempt at a Solution
For the...
Why caffeine has 178 oC as point of sublimation but 237 oC as melting point?
Is it about the pressure? If so, then what is the preesure that makes 237 as melting point instead of sublimation at 178 oC? Cuz the science websites always just said 237 is the melting point, but didn't mention the...
Why caffeine is more soluble in dichloromethane than in water?
I thought caffeine is more polar than water and water is more polar than dichloromethane, so shouldn't caffeine is more soluble in water than in dichloromethane, since their dipole moment is closer?