the_fungible_man

the_fungible_man t1_jdu7skt wrote

Reply to comment by mfb- in Can you entangle more than two particles? Can entanglement be produced on a macroscopic scale to observe new physical interactions? by and-no-and-then

I read the article you linked, and achieved 0% comprehension, which made me wonder, how esoteric is the information it presented? Pretty basic for physics post-grad students? Or only those with advanced degrees specifically in more narrow physics specialties?

5

the_fungible_man t1_jcx1bsg wrote

Reply to How much space does it require to accommodate 1 hydrogen atom? by Alvsvar

One hydrogen atom occupies approximately 6 x 10^(-31) m^(3). Nearly all of that volume is empty space. But then the volume occupied by every atom is overwhelmingly empty space.

The hydrogen nucleus, a single proton at the center, is about 1.7 femtometers wide (1.7 x 10^(-15) m). While the spherical electron cloud surrounding it (which contain one solitary electron) has a Bohr radius of approximately 50 picometers (5 x 10^(-11) m).

6

the_fungible_man t1_jci0mls wrote

Reply to comment by dangil in Energy can not dissappear or be created, only change form, right? Earth is blasted by the sun 24/7, where does the excess energy go, because I guess it doesn't stay here or we'd cook by mr_greenmash

>Basically every form of energy on earth available to humanity or not comes from the sun’s energy.

Two significant exceptions come to mind:

  • Nuclear energy does not come from the Sun.

  • Geothermal energy is not powered by the Sun.

11

the_fungible_man t1_jbw6or7 wrote

Reply to What if an interstellar object like Oumuamua crashes into Earth? by stanerd

>wasn't the Moon formed by a huge asteroid slamming into Earth

The moon was formed by a planet slamming into the Earth. There are no longer any rogue planets waiting to smack into the Earth.

Whether a smaller interstellar object would be detected before impact depends on its size and direction of approach. Such objects travel faster relative to the Earth than local asteroids, shortening to lead time between detection and impact. In the unlikely event the object approached from the sunward direction we might never see it coming.

BTW, the Earth has been struck by meteoroids of interstellar origin as recently as 2014. Our atmosphere affords us a great deal of protection from most of what's out there, interstellar or not.

>How could we stop it though?

For the foreseeable future, we couldn't.

9

the_fungible_man t1_japz7vm wrote

Reply to comment by RabbitFuzz in The Vyvanse patent expires this year. How long does it usually take generic alternatives to get approved, and how much of a reduction in cost is expected on average? by paleselan1

Following that link, it appears that the Vyvanse patents expired on February 24^th . It will be interesting to see whether and how quickly these other manufacturers are able to bring a generic to the market.

44

the_fungible_man t1_j8brln1 wrote

Reply to Hours to impact! A newly discovered asteroid will hit Earth's atmosphere near northern France on February 13 around 03:00 UTC (that's around 9 pm CST). Fortunately, the asteroid, named Sar2667, is just 1-meter wide, which means it poses no danger to Earth. by Remote_Combination14

Link to video of Sar2667 vaporizing high above France: https://www.reddit.com/r/space/comments/110xr10/small_asteroid_spotted_in_south_of_england_13th/

48

the_fungible_man t1_j7csiu8 wrote

Reply to How does shingles cause a rash when the infection is located all the way in the dorsal ganglia? by menooby

The varicella zoster virus (VZV) can lie dormant in the dorsal root ganglia for decades after the immune system has cleared the virus from the rest of the body (from an initial chickenpox infection).

However, once reactivated, the VZV resumes replication and virions are transported through neural cells from the ganglia into the associated skin area. The subsequent immune response produces localized inflammation, blistering, and pain.

8

the_fungible_man t1_j6auoxh wrote

Reply to In the event of a fatal manned mission (example Artemis 2), would exploration stop in this period? by damarisu

The deaths aboard Soyuz 1 and Soyuz 11 didn't end Soviet manned spaceflight.

The Apollo 1 fire didn't stop the Apollo program.

The loss of the Challenger delayed, but didn't stop future Shuttle launches.

The loss of Columbia ultimately led to the end of the Shuttle program, but not for another 8 years during which 22 more missions were flown.

Crewed spaceflight will continue.

3

the_fungible_man t1_j5gq7e4 wrote

Reply to comment by Doumtabarnack in Oumuamua by Doumtabarnack

Its encounter with the Sun changed the direction of it's motion, but not its speed. It's path was bent 66° by its trip through the Sun's gravity well, but for all practical purposes – treating the Sun and Oumuamua as a simplified two body system – Oumuamua left the solar system at the same speed it entered it.

3