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bio website abelmolina.me
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visits member for 3 years, 5 months
seen Jul 17 at 21:06

Jul
15
comment Why doesn't matter pass right through other matter if atoms are 99.999% empty space?
Thanks for asking this, I had wondered the same for a long time, and ended up just using classical justifications (thinking the number of layers of atoms would just cancel out the small volume), it was great to see how that was not the case in the answer : )
Jul
10
comment Classic home experiments for an 8-year-old child
Maybe something about resonant frequency?
Jul
6
comment Why is filling a balloon from your mouth much harder initially?
I think it's interesting how this gives an example where the formal concept of force doesn't match the intuition about what is going on...
Apr
26
revised Why are sine/cosine always used to describe oscillations?
added 1 character in body
Apr
26
answered Why are sine/cosine always used to describe oscillations?
Feb
21
comment What is the difference between translation and rotation?
Charged particle in magnetic field.
Feb
15
comment Does an athlete's proficiency at luge depend on his mass?
Uhm, if I am reading the answer from User11865 right, the rider's surface area is proportional to m^(2/3)
Oct
15
revised Proof that Our Planet is 1D
added 16 characters in body
Oct
14
answered Proof that Our Planet is 1D
Sep
1
answered What is the difference between translation and rotation?
Jul
27
comment How can a photon have no mass and still travel at the speed of light?
For the "talking to laypeople" part, I'd actually suggest starting by explaining what physicists mean by mass. Starting with the difference between gravitational and inertial mass is probably good, specially if it is remarked that neither of those is what people probably have mind (which would be more like "Amount of stuff")
Jul
8
awarded  Popular Question
Jun
10
comment Classical results proved using quantum mechanics
Just being pedantic here, but as far as I understand the correspondence between classical and quantum mechanics is a bit more subtle than taking the limit hbar -> 0. See arxiv.org/abs/1201.0150 for some interesting elaboration on the topic.
May
10
awarded  Editor
May
10
revised Has anyone theorized a connection between entropy and quantum uncertainty?
added 1 characters in body
May
10
comment Is the universe fundamentally deterministic?
That last comment reminds me of en.wikipedia.org/wiki/Black_hole_information_paradox ...
Mar
2
comment Why is gravity so hard to unify with the other 3 fundamental forces?
I'm not sure I know what I'm talking about, but I'd say another (other than considering well-defined force particles) relevant aspect of quantum modeling here is that the entities in it don't have a particular position in space. It makes sense that it is hard to apply this idea to space itself.
Feb
22
awarded  Supporter
Feb
22
awarded  Critic
May
4
awarded  Yearling