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  #1326  
Old 08-10-2019, 11:42 AM
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Default Re: Drive by science



New ‘Galaxy’ Crayfish Discovered In Indonesia Has A Nebula On Its Shell | Bored Panda
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  #1327  
Old 09-12-2019, 11:14 PM
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  #1328  
Old 09-12-2019, 11:39 PM
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  #1329  
Old 09-13-2019, 05:15 AM
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I've found a new life goal and anthem for the living of life.
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  #1330  
Old 09-14-2019, 09:06 AM
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  #1331  
Old 09-27-2019, 07:23 PM
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Default Re: Drive by science

https://cimss.ssec.wisc.edu/goes/blo...orian_anim.gif

Time lapse of Dorian moving on the Bahamas. I refrained from embedding it because it's a large download.
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  #1332  
Old 09-30-2019, 10:39 AM
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Default Re: Drive by science

Spiders are super cool as always.

Spiders Use Earth's Electric Field to Fly Hundreds of Miles - The Atlantic

Also, what does this mean for Spiderman? Bort, please tell us in a detailed essay :D
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  #1333  
Old 09-30-2019, 12:03 PM
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Quote:
climb to an exposed point, raise their abdomens to the sky, extrude strands of silk, and float away
I can't remember which Spiderman film this happens in
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  #1334  
Old 09-30-2019, 04:27 PM
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Default Re: Drive by science

Quote:
Originally Posted by slimshady2357 View Post
Also, what does this mean for Spiderman? Bort, please tell us in a detailed essay :D
One definitely has to file long-enough run comics into the COMICS ARE WEIRD file at some point. Some sooner than others. Historically, Marvel hasn't been as enamoured with the reboots and reimagines and rewipes and reattempts at hero making as their prime competitor. But there's always room for power creep and smarterer writing for when the next story just has to be bigger or more powerful than the last one, right?

I can't speak too in depth about the comic-comic history of the Spider-Man except in broad strokes. But the cinematic versions of the character are easy to digest. It doesn't show up in either the MacGuire or Garfield Spiders-Man, but the Marvel-Sony Tom Holland guy gets a good powerup thanks to Tony Stark. (A situation I'm not as big a fan of, but it forwards both characters' stories so I deal with it.)

One of this power additions is an ability to electrify the webbing. I don't remember if Homecoming showed this off explicitly or if it was briefly mentioned by the suit AI. In the Far From Home movie, however, it's used to fantastic effect and quite liberally.

I'd have to review - any excuse to rewatch is good - Into the Spider-verse which stars multiple versions of the Spider-Man, including Spider-Ladies, the central protagonist is an alternate universe Spider-Man who has no other connection to Peter Parker or his extended circle of friends, allies or enemies. His special power I believe is called a venom strike. Envenomed? I think it's unique among all of the other Spider-Persons (and Pig). There may be some electricity based component to it as well.

So. You see. Marvel is way ahead of the science of spiders using electricity.

:glasses:
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  #1335  
Old 10-02-2019, 10:48 AM
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  #1336  
Old 10-04-2019, 08:35 AM
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Default Re: Drive by science

Alien civilization blocks humanity after receiving unsolicited nudes - The Beaverton

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  #1337  
Old 10-04-2019, 04:36 PM
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Default Re: Drive by science

This is a small tile on the moon.

What? No thatís Andy Warhollís initials. Get your mind out of the gutter!
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  #1338  
Old 10-07-2019, 02:30 PM
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Magnets! How do they work?




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  #1339  
Old 10-07-2019, 05:26 PM
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Default Re: Drive by science

What's going on in the second pic? Looks like it's something to do with magnetic fields, but why does the weight stop swinging so suddenly, and why doesn't it swing back or wobble more than it does? It looks super unnatural.
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  #1340  
Old 10-07-2019, 05:56 PM
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Default Re: Drive by science

Good ol Lenz law. Itís the same effect as dropping a magnet down a copper pipe and having it fall slower. The changing magnetic field from its motion is inducing a current in the copper block which is in the direction that produces an opposing magnetic field to the inducing one. Similar to a generator motion is being turned into current and ultimately heat.

The neodymium magnets magnetic field is so strong compared to its weight that the induced current is able to sap all of the motion from the swinging magnet and bring it to a dead stop.
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  #1341  
Old 10-07-2019, 06:04 PM
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Yes. You can also see that the magnet is reluctant to move AWAY from the copper block when it's drawn back (the zoomed-out part of the video shows that best).

Whenever a magnet moves relative to a nearby conductor, eddy currents are induced in the conductor - and those eddy currents set up a magnetic field that opposes the magnet's movement.

If you've got superconductor so that the eddy currents can flow without resistance, you can levitate magnets over it - or levitate the superconductor over a magnet.


With a regular old copper block, the eddy currents do encounter resistance and quickly die away - so it behaves more like a shock absorber for the magnet than the 'perfect spring' behaviour of the superconductor.
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  #1342  
Old 10-07-2019, 06:35 PM
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Default Re: Drive by science

Eddy's in the space-time continuum.
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  #1343  
Old 10-08-2019, 08:46 PM
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Is he?
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  #1344  
Old 10-09-2019, 01:29 AM
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In old-fashioned cars with speedometers and tachometers with real mechanical hands (pointers) the dials worked by this effect. There was a spinning cable connected to the wheels or engine that spun a magnet around inside the instrument. There was an aluminium cup around the magnet - and that cup was connected to the indicator hand/pointer with a spring pulling it back towards zero. The faster you drove, the faster the magnet spun, and that dragged the cup with it against the force of the spring, so indicating your speed.

This was the standard way of doing it up till about 30 years ago. Most modern vehicles have electrically driven instruments, even if they still have mechanical hands.
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  #1345  
Old 10-09-2019, 10:12 AM
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Sprites, upper atmosphere "cold lightning". APOD: 2019 October 8 - Sprite Lightning in HD
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Old 10-09-2019, 04:48 PM
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Default Re: Drive by science

For a second I thought it was an artsy photo for a fuzzy spider's pedipalps.
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  #1347  
Old 10-09-2019, 04:52 PM
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IT CAN BE THAT TOO.

Unless the chelicerae are in the way.
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  #1348  
Old 10-12-2019, 06:58 AM
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Old 10-18-2019, 11:17 PM
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Quote:
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Eddy's in the space-time continuum.
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Old 10-21-2019, 03:59 AM
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Quote:
Originally Posted by ceptimus View Post
Yes. You can also see that the magnet is reluctant to move AWAY from the copper block when it's drawn back (the zoomed-out part of the video shows that best).

Whenever a magnet moves relative to a nearby conductor, eddy currents are induced in the conductor - and those eddy currents set up a magnetic field that opposes the magnet's movement.

If you've got superconductor so that the eddy currents can flow without resistance, you can levitate magnets over it - or levitate the superconductor over a magnet.

Magnetic Levitation with a Superconductor - YouTube

With a regular old copper block, the eddy currents do encounter resistance and quickly die away - so it behaves more like a shock absorber for the magnet than the 'perfect spring' behaviour of the superconductor.
By serendip, just the other day I was watching the gold mining show and thought of using eddy current to separate the gold. I was disappointed to learn that my invention of the eddy current separator was late by about 57 years. :laugh:

As far as I read, though, the separators aren't used for gold, more for getting other non ferrous metals out of a mixed materials stream.
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