arcadi7

3 ms·

1.
by arcadi7 2y ago
Rutherford, planck , bohr jumpstarted the 20th century physics .
2.
by arcadi7 2y ago
and they _always_ have few percent of protons and electrons — every single neutron star .
3.
by arcadi7 2y ago
and they _always_ have few percent of protons and electrons — every single one of them .
4.
by arcadi7 2y ago
protons can generate neutrons and neutrons can generate protons . why are there no nuclea with only neutrons ? — these could be as big as you want because there is no electric repulsion . the answer is that only neutron nucleus would have —
5.
by arcadi7 2y ago
nucleus is extremely fluffy by general relativity standards . for black holes the mass and size are linearly proportional . the solar mass black hole has few mile size and has density few times smaller than that of the nucleus . solar mass
6.
by arcadi7 2y ago
nonsense . heavy nuclea are bound states of many constituents . no different from grain of salt . grain of salt can be much heavier than planck mass (which is about few micrograms
7.
by arcadi7 3y ago
Short answer: talk about quantum wells in this context is meaningless .
8.
by arcadi7 5y ago
Not metaphors . We know these are out there — we just don’t know a lot about them. The situation is similar to atoms in second half of 19th century : we knew they are there , we knew some of their properties but only it the first quarter of
9.
by arcadi7 5y ago
the funny thing is that the calculation in this article misses the point, especially in the Feynman context. First, beyond all trickery, the log(alpha) answer might suggest that something bad happens at alpha=0 . What makes this integral i
10.
by arcadi7 8y ago
find a small group of people that are excited about what they are doing -- then go from there