Category: reblog



Real’s Math Ask Meme

  1. What math classes have you taken?
  2. What math classes did you do best in?
  3. What math classes did you like the most?
  4. What math classes did you do worst in?
  5. Are there areas of math that you enjoy? What are they?
  6. Why do you learn math?
  7. What do you like about math?
  8. Least favorite notation you’ve ever seen?
  9. Do you have any favorite theorems?
  10. Better yet, do you have any least favorite theorems?
  11. Tell me a funny math story.
  12. Who actually invented calculus?
  13. Do you have any stories of Mathematical failure you’d like to share?
  14. Do you think you’re good at math? Do you expect more from yourself?
  15. Do other people think you’re good at math?
  16. Do you know anyone who doesn’t think they’re good at math but you look up to anyway? Do you think they are?
  17. Are there any great female Mathematicians (living or dead) you would give a shout-out to?
  18. Can you share a good math problem you’ve solved recently?
  19. How did you solve it?
  20. Can you share any problem solving tips?
  21. Have you ever taken a competitive exam?
  22. Do you have any friends on Tumblr that also do math?
  23. Will P=NP? Why or why not?
  24. Do you feel the riemann zeta function has any non-trivial zeroes off the ½ line?
  25. Who is your favorite Mathematician?
  26. Who is your least favorite Mathematician?
  27. Do you know any good math jokes?
  28. You’re at the club and Andrew Wiles proves your girl’s last theorem. WYD?
  29. You’re at the club and Grigori Perlman brushes his gorgeous locks of hair to the side and then proves your girl’s conjecture. WYD?
  30. Who is/was the most attractive Mathematician, living or dead? (And why is it Grigori Perlman?)
  31. Can you share a math pickup line?
  32. Can you share many math pickup lines?
  33. Can you keep delivering math pickup lines until my pants dissapear?
  34. Have you ever dated a Mathematician?
  35. Would you date someone who dislikes math?
  36. Would you date someone who’s better than you at math?
  37. Have you ever used math in a novel or entertaining way?
  38. Have you learned any math on your own recently?
  39. When’s the last time you computed something without a calculator?
  40. What’s the silliest Mathematical mistake you’ve ever made?
  41. Which is better named? The Chicken McNugget theorem? Or the Hairy Ball theorem?
  42. Is it really the answer to life, the universe, and everything? Was it the answer on an exam ever? If not, did you put it down anyway to be a wise-ass?
  43. Did you ever fail a math class?
  44. Is math a challenge for you?
  45. Are you a Formalist, Logicist, or Platonist?
  46. Are you close with a math professor?
  47. Just how big is a big number?
  48. Has math changed you?
  49. What’s your favorite number system? Integers? Reals? Rationals? Hyper-reals? Surreals? Complex? Natural numbers?
  50. How do you feel about Norman Wildberger?
  51. Favorite casual math book?
  52. Do you have favorite math textbooks? If so, what are they?
  53. Do you collect anything that is math-related?
  54. Do you have a shrine Terence Tao in your bedroom? If not, where is it?
  55. Where is your most favorite place to do math?
  56. Do you have a favorite sequence? Is it in the OEIS?
  57. What inspired you to do math?
  58. Do you have any favorite/cool math websites you’d like to share?
  59. Can you reccomend any online resources for math?
  60. What’s you favorite number? (Wise-ass answers allowed)
  61. Does 6 really *deserve* to be called a perfect number? What the h*ck did it ever do?
  62. Are there any non-interesting numbers?
  63. How many grains of sand are in a heap of sand?
  64. What’s something your followers don’t know that you’d be willing to share?
  65. Have you ever tried to figure out the prime factors of your phone number?
  66. If yes to 65, what are they? If no, will you let me figure them out for you? 😉
  67. Do you have any math tatoos?
  68. Do you want any math tatoos?
  69. Wanna test my theory that symmetry makes everything more fun?
  70. Do you like Mathematical paradoxes?
  71. 👀
  72. Are you a fan of algorithms? If so, which are your favorite?
  73. Can you program? What languages do you know?

I’m a physicists, but still



no longer going to pursue a career! id like to be a rock. thanks


Me, a disgraced academic turned farmer, surveying my crops: Finally… I am out standing in my field



It’s completely implausible and a violation of common-sense intuition to think that not-P. Therefore P.

astronomyblog: Retrograde motion of Mars in t…


Retrograde motion of Mars in the night sky of the Earth.

Image Credit: Tunc Tezel

stem-stims: Physics: More pencil tricks Sourc…


Physics: More pencil tricks


astronomyblog: images of the Sun captured duri…


images of the Sun captured during the first year of NASA’s Solar Dynamics Observatory (SDO) mission.

Credit: NASA/SDO






the drum is filled with hot steam and then sprayed with cold water. the pressure on the outside of the drum is far more than inside. the pressures try to maintain and find balance taking the drum as a casualty.

“Oh FUCK that’s cold!”

when youre in the shower and someone flushes the toilet

My Chemistry teacher did this the first day of class with a coke can, a hotplate, and a basin of water. I have never forgotten the scientific principles behind it, and here’s why.

There were 20-something of us in the classroom, all dying of sleep deprivation since it was the first day back to school, first class of the day. Mr. Moses was that teacher you weren’t sure how to deal with. I mean, the man’s name was Noah Eugene Moses, for starters. He drove a Harley to school, but also drove the bus. He had giant cokebottle glasses and a doofy mustache with shaggy ex-Beatles hair. He always wore suspenders and a grease-stained t-shirt because he had a potbelly and taught the shop/electrical classes. He wasn’t even really lecturing; he was throwing in tidbits of the syllabus in the midst of bad jokes and fun stories. We were all a bit nervous, because none of us had taken a class from him before, but his tests were legendary—nobody had ever made it out with an A (until I did, but that’s another story for another time and involves a really awesome bet and some hair cutting scissors).

Well, as we were fighting to stay awake, and attempting to take notes of whatever he was talking about, he was pacing around the room from here to there, straightening things and moving stuff. He was very scatterbrained, and it was easy to tell from how he kept forgetting where he put his coke. Turns out, that was just a ruse. He had the can filled with just a tiny bit of water, and the things he was moving around were stacks of papers and books hiding the hot plate and water basin. So he set his coke can down onto the hot plate, continued talking loudly enough so we wouldn’t hear the water boiling, and then knocked it over really fast into the water basin.


Three girls fell out of their seats, one dude swore so violently I’m pretty sure the devil himself cringed, everyone at least jumped and screamed, and I actually broke my pen in half.

See, with rapid decompression comes a vacuum, and with a vacuum comes a rushing of air that creates a massive sound. Think “thunder”. That’s the same principle behind it. His little tiny coke can of steam into a bucket of ice water, and we had a bang so loud the band teacher came in from across the hall to see “what was exploding today.” To which Mr. Moses responded, “Nothing, it imploded. Explosions are chapter 3.”

And that’s when I knew it was going to be the best class ever.

spaceplasma: SN 2006gy: Possible Quark Nova …


SN 2006gy: Possible Quark Nova

Supernovae (SN) usually occur when massive stars exhaust their fuel and collapse under their own gravity. In the case of SN 2006gy, however, a very different effect may have triggered the explosion. SN 2006gy and its host galaxy NGC 1260 are located in the Perseus Cluster of galaxies, part of the Pisces-Perseus Supercluster.

The SN 2006gy – discovered by Robert Quimby in 2006 August, has challenged our understanding of stellar evolution. SN 2006gy was 100 times more luminous than a typical SN and at the time the most energetic ever recorded. For almost a year it continued to radiate at a rate in which an ordinary SN could only sustain for at most a few days. The superluminous SN was too bright in visible light for Type-II supernovae produced by most massive stars, and it produced relatively few x-rays for Type Ia supernovae, which means SN 2006gy may have originated from an extremely massive star.

Massive stars with 130 – 250 solar masses produce high-energy gamma rays that can convert some of the energy into matter and anti-matter pairs (mostly electron-positron pairs). Instead of mass being converted to energy in the star’s core, energy is being converted to mass (nickel-56). The resulting drop in pressure causes the star to shed some of its outer layers in a large eruption, and collapse – earlier than expected during the luminous blue variable (LBV) phase. Pair instability supernovae are luminous enough but they seem to have a slow rise, and core collapse.


 However, there’s an alternative, more exotic explanation. Subsequent study of SN 2006gy suggests that it underwent a neutron star (NS) to quark-nova (QN) stage. A quark nova, is the explosion driven by phase transition of the core of a neutron star to the quark matter phase leading to the formation of a quark star (QS). The collision between material ejected through the QN explosion and the preceding stellar envelope could basically re-brighten the SN, which means it could radiate at higher levels for longer periods of time.

Check out the links below for more information:

X-ray: NASA/CXC/UC Berkeley/N.Smith et al.; IR: Lick/UC Berkeley/J.Bloom & C.Hansen