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AGelbert

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Environmental Rules Being Rolled Back in the US 😠
« Reply #120 on: September 16, 2019, 07:53:46 pm »
Environmental Rules Being Rolled Back in the US

58 views•Published on Sep 16, 2019


The Science Revolution
339 subscribers

In the Science Revolution, Thom Hartmann covers the Trump administration trying to save us from the tyranny of efficient lightbulbs, with environmental rules being rolled back.

Also, author, Tim Wise joins Thom to talk about big AG and its effects on climate change. In our GBU segment,  the  Good is Ireland and what they're doing to help the climate and there is a very very ugly killer in the Mohave Desert, not found yet - we'll be talking about.

Plus, our new Geeky Science segment is inspired by Thom's indoor cat, Kedi, getting loose outdoors, and what he did.

Click the time to jump to a segment:
0:37 Energy Light Bulbs
3:15 Is Big Agriculture Destroying the Planet?
13:03 The Good, the Bad and the Very, Very Ugly
14:57 Geeky Science
16:08 Science Fact of the Week

0:37 ENERGY LIGHT BULBS
The Trump administration in the US continues to roll back environmental protections, this time on energy-efficient light bulbs. Is this going to help destroy civilization for profits?

3:15 IS BIG AGRICULTURE DESTROYING THE PLANET?
With special guest Tim A. Wise

Is big agriculture the biggest obstacle to solving climate change? Chemical intensive agriculture is kicking our planet and actually contributing to world hunger.

The deforestation in Brazil is contributing to CO2.

Why is the US federal government promoting the industrializing of land and pushing the same in other countries? Small scale farmers around the world are being pushed to increase in size and use chemicals produced in the US. Seed companies want farmers to not save seeds for the next year but buy fresh seed every year. There is nothing climate-smart or sustainable about that.

Timothy A. Wise joined Thom to explain the policies and what is going wrong.

13:03 THE GOOD, THE BAD & THE VERY, VERY UGLY
The Good - Ireland Planting Trees
The Bad - Broadcast News
The Ugly - The Killer of 42 Wild Burros

14:47 GEEKY SCIENCE
To crows chase cats? They do at the Hartmann residence. And what of bird sounds and squirrels?

16:08 SCIENCE FACT OF THE WEEK
According to scientists at NOAA's National Centers for Environmental Information - July 2019 was the hottest month on record for the planet. The average global temperature in July was 1.71 degrees F above the 20th-century average, making it the hottest July in the 140-year record. The previous hottest month on record was July 2016. Nine of the 10 hottest Julys have occurred since 2005 -- with the last five years ranking as the five hottest. Not surprising - There is also record-low sea ice. Average Arctic sea ice set a record low for July, running 19.8% below average -- surpassing the previous historic low of July 2012.

#MoreScienceRevolution
Category Education
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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🕵️ The Bizarre Behavior of Rotating Bodies , Explained 🧐
3,535,089 views • Sep 19, 2019


Veritasium
6.47M subscribers
Spinning objects have strange instabilities known as The Dzhanibekov Effect or Tennis Racket Theorem - this video offers an intuitive explanation.
Part of this video was sponsored by LastPass, click here to find out more: https://ve42.co/LP

References:
Prof. Terry Tao's Math Overflow Explanation: https://ve42.co/Tao

The Twisting Tennis Racket
Ashbaugh, M.S., Chicone, C.C. & Cushman, R.H. J Dyn Diff Equat (1991) 3: 67. https://doi.org/10.1007/BF01049489

Janibekov’s effect and the laws of mechanics
Petrov, A.G. & Volodin, S.E. Dokl. Phys. (2013) 58: 349. https://doi.org/10.1134/S102833581308...

Tumbling Asteroids
Prave et al. https://doi.org/10.1016/j.icarus.2004...

The Exact Computation of the Free Rigid Body Motion and Its Use in Splitting Methods
SIAM J. Sci. Comput., 30(4), 2084–2112
E. Celledoni, F. Fassò, N. Säfström, and A. Zanna
https://doi.org/10.1137/070704393

Animations by Iván Tello and Isaac Frame

Special thanks to people who discussed this video with me:
Astronaut Don Pettit
Henry Reich of MinutePhysics
Grant Sanderson of 3blue1brown
Vert Dider (Russian YouTube channel)


Below is a further discussion by Henry Reich that I think helps summarize why axes 1 and 3 are generally stable while axis 2 is not:

In general, you might imagine that because the object can rotate in a bunch of different directions, the components of energy and momentum could be free to change while keeping the total momentum constant.


However, in the case of axis 1, the kinetic energy is the highest possible for a given angular momentum, and in the case of axis 3, the kinetic energy is the lowest possible for a given angular momentum (which can be easily shown from conservation of energy and momentum equations, and is also fairly intuitive from the fact that kinetic energy is proportional to velocity squared, while momentum is proportional to velocity - so in the case of axis 1, the smaller masses will have to be spinning faster for a given momentum, and will thus have more energy, and vice versa for axis 3 where all the masses are spinning: the energy will be lowest). In fact, this is a strict inequality - if the energy is highest possible, there are no other possible combinations of momenta other than L2=L3=0, and vice versa for if the energy is the lowest possible.

Because of this, in the case of axis 1 the energy is so high that there simply aren't any other possible combinations of angular momentum components L1, L2 and L3 - the object would have to lose energy in order to spin differently. And in the case of axis 3, the energy is so low that there likewise is no way for the object to be rotating other than purely around axis 3 - it would have to gain energy. However, there's no such constraint for axis 2, since the energy is somewhere in between the min and max possible. This, together with the centrifugal effects, means that the components of momentum DO change.

Category Education
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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If You Think Jupiter Orbits the Sun, You're Mistaken
« Reply #122 on: November 01, 2019, 01:33:09 pm »
An artist's depiction of the solar system. ANTAR DAYAL/GETTY IMAGES

If You Think Jupiter Orbits the Sun, You're Mistaken     
BY CHRISTOPHER HASSIOTIS AUG 9, 2016


If we picture the solar system, we often picture our dominant star at the center of things, static and immobile as planets orbit circles around it. That picture makes things simple to understand, but technically it's inaccurate. Take our largest planet Jupiter, for instance. It doesn't orbit the sun's center — it orbits a spot in empty space between it and the sun called the barycenter. This is because the sun doesn't just exert gravity on Jupiter — Jupiter's so big that its own pull affects how the sun moves, too.

The sun is about 1,000 times more massive than Jupiter, and these two bodies affect one another proportionally according to distance and mass, so the amount Jupiter's gravity pulls on the sun is one-thousandth the amount the sun's gravity pulls on Jupiter. And Jupiter's orbit takes 11.8 Earth years to complete, and the sun travels around the barycenter takes the same amount of time.

The Sol-Jupiter barycenter sits 1.07 times the radius of the sun from the sun's center, or 7 percent the radius of the sun from the surface. The sun also orbits this spot; if you were to look at the planetary plane from above, you'd notice a slight wobble as the sun moves around the Milky Way, as this hypnotic NASA animation helps explain.

https://science.howstuffworks.com/jupiter-orbit-sun-barycenter.htm

He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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Water Vapor Plumes on Europa
110,186 views•Nov 18, 2019


NASA Goddard
615K subscribers

What makes Jupiter's moon Europa so alluring is the possibility that it may possess all the ingredients necessary for life. Scientists have evidence that one of these ingredients, liquid water, is present under the icy surface and may sometimes erupt into space in huge geysers. However, no one has been able to confirm the presence of water in these plumes by direct measurement of the water molecule itself. Now, an international research team led out of NASA's Goddard Space Flight Center in Greenbelt, Maryland has detected the water vapor for the first time above Europa's surface. The team measured the vapor by peering at Europa through one of the world's biggest telescopes in Hawaii. Confirming that water vapor is present above Europa helps scientists better understand the inner workings of the moon.

Science Paper: https://www.nature.com/articles/s4155...

Video Credits:
Produced and Edited by: David Ladd (USRA/NASA's Goddard Space Flight Center)
Animations by: Michael Lentz (USRA/NASA's Conceptual Image Lab), and NASA's Jet Propulsion Laboratory
Lead Scientist: Lucas Paganini

Music provided by Killer Tracks: "Cross the Line" - Wally Gagel & Xandy Barry

Keck Observatory visuals provided by: Sean Goebel/W. M. Keck Observatory

This video is public domain and along with other supporting visualizations can be downloaded from the Scientific Visualization Studio at: http://svs.gsfc.nasa.gov/13163

Credit: NASA's Goddard Space Flight Center/David Ladd

If you liked this video, subscribe to the NASA Goddard YouTube channel: http://www.youtube.com/NASAExplorer

Follow NASA’s Goddard Space Flight Center
·  Instagram http://www.instagram.com/nasagoddard
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·  Facebook: http://www.facebook.com/NASA.GSFC
·  Flickr http://www.flickr.com/photos/gsfc
Category Science & Technology
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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Dark Matter ✨
« Reply #124 on: January 15, 2020, 11:40:01 pm »
Dark Matter ✨
358,886 views•Aug 18, 2016


Isaac Arthur
450K subscribers

A look at Dark Matter, what it is, what it isn't, and what it might be used for.

Visit our Website:
www.IsaacArthur.net

Support the Channel on Patreon:
https://www.patreon.com/IsaacArthur

Listen or Download the audio of this episode from Soundcloud:
https://soundcloud.com/isaac-arthur-1...

Cover Art by Jakub Grygier:
https://www.artstation.com/artist/jak...

Dark Matter as Primordial Black Holes discusses:
http://www.space.com/33122-dark-matte...
Caption author (Portuguese)
Uendel Quintela
Category
Science & Technology
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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Moon: Industrial Complex
51,092 views•Jan 16, 2020

;)
Isaac Arthur
450K subscribers

Visit our sponsor, Brilliant: https://brilliant.org/IsaacArthur/
The Moon is gateway to space, and in the future it might serve as an industrial and mining complex fueling vast production of spaceships, rocket fuel, satellites, space stations, and colonial habitats.

Visit our Website: http://www.isaacarthur.net
Support us on Patreon: https://www.patreon.com/IsaacArthur
SFIA Merchandise available: https://www.signil.com/sfia/

Social Media:
Facebook Group: https://www.facebook.com/groups/15839...
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Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.
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Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-1...
Episode's Narration-only version: https://soundcloud.com/isaac-arthur-1...

Credits:
Moon: Industrial Complex
Episode 221; Jan 16, 2020

Writers:
Isaac Arthur
Keith Blockus

Editors:
Jerry Guern
S. Kopperud
S. Graham

Produced & Narrated by
Isaac Arthur

Cover Art:
Jakub Grygier https://www.artstation.com/jakub_grygier

Graphics:
Andy Nelson
Jarred Eagley
Jeremy Jozwik https://www.artstation.com/zeuxis_of_...
Justin Dixon
Ken York https://www.facebook.com/YDVisual/
Kristijan Tavcar https://www.miragedereve.com
Sergio Botero https://www.artstation.com/sboterod?f...
Space Resources CGI
Tytus Grabowski
Udo Schroeter

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Category Science & Technology
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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💫 Aerodynamics of Cars
« Reply #126 on: May 24, 2021, 03:52:31 pm »
Wings and Spoilers; Lift and Drag 👉 How it Works 🧐
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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How BIG Is The Milky Way?
« Reply #127 on: June 16, 2021, 03:38:14 pm »
The visible part of our galaxy is only 10% of the TOTAL MASS!

How BIG Is The Milky Way?

The Milky Way Galaxy (visibile part)
"The artist's concept also includes a new spiral arm, called the "Far-3 kiloparsec arm," discovered via a radio-telescope survey of gas in the Milky Way. This arm is shorter than the two major arms and lies along the bar of the galaxy.

Our Sun lies near a small, partial arm called the Orion Arm, or Orion Spur, located between the Sagittarius and Perseus arms."


Source: NASA/JPL-Caltech/R. Hurt (SSC/Caltech)
Published: November 8, 2017

He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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Heliosphere

Scientists publish the first 3D map of the heliosphere — the final boundary between our system and interstellar space

By Tibi Puiu on Jun 15, 2021 03:49 pm

It will help scientists better understand interactions between solar and interstellar winds.

Full article:
https://www.zmescience.com/science/news-science/scientists-publish-the-first-3d-map-of-the-heliosphere-the-final-boundary-between-our-system-and-interstellar-space/

He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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Flying Objects A State Secret | 🤖 UFO Documentary
Jun 7, 2021 52,930 views


Cow Lamp Films 10.4K subscribers

Are UFOs real? Unidentified flying objects have been a state secret for a long time. In less than 100 years, mankind has experienced a wide range of U.F.O./U.A.P. phenomena the world over. From these experiences, fascinating data has been gathered by military, government, and private organizations in key geopolitical countries, leading people within these organizations to believe that a unified human effort should be undertaken to study extraterrestrial phenomena.

Watch this UFO documentary and let us know what you think in the comments.

"Covers the most up to date, most credible ufo incidents in recent memory including the Pentagon UFO videos. While nothing new for ufo enthusiasts, for anyone not in deep in the ufo field, it's a short, succinct, straight to the point ufo documentary on the latest happenings."

Cow Lamp Films is the Midwest’s first and only full service independent film and television distributor.

He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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A Heat Shield For The Largest Spacecraft Ever Built
« Reply #130 on: August 15, 2021, 12:41:03 pm »
Aug 8, 2021

How SpaceX Designed A Heat Shield For The Largest Spacecraft Ever Built


Scott Manley 1.29M subscribers

For the first time we saw the fully assembled Starship/SuperHeavy stack assembled on the pad. This is all designed to put Starship, the largest spacecraft ever built, into orbit, but we also got a really good look 🧐 at a near complete thermal protection system, and that's critical to bringing the Starship back from orbit safely.
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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The Big Misconception About Electricity
« Reply #131 on: November 27, 2021, 04:53:57 pm »
6,452,415 views :o 👍 Nov 19, 2021

The Big Misconception About ⚡ Electricity


Veritasium 10.9M subscribers

The misconception is that electrons carry potential energy around a complete conducting loop, transferring their energy to the load. This video was sponsored by Caséta by Lutron. Learn more at https://Lutron.com/veritasium

Further analysis of the large circuit is available here: https://ve42.co/bigcircuit

Special thanks to Dr Geraint Lewis for bringing up this question in the first place and discussing it with us. Check out his and Dr Chris Ferrie’s new book here: https://ve42.co/Universe2021
 
Special thanks to Dr Robert Olsen for his expertise. He quite literally wrote the book on transmission lines, which you can find here: https://ve42.co/Olsen2018
 
Special thanks to Dr Richard Abbott for running a real-life experiment to test the model.
 
Huge thanks to all of the experts we talked to for this video -- Dr Karl Berggren, Dr Bruce Hunt, Dr Paul Stanley, Dr Joe Steinmeyer, Ian Sefton, and Dr David G Vallancourt.

▀▀▀
References:
A great video about the Poynting vector by the Science Asylum:

Sefton, I. M. (2002). Understanding electricity and circuits: What the text books don’t tell you. In Science Teachers’ Workshop. -- https://ve42.co/Sefton

Feynman, R. P., Leighton, R. B., & Sands, M. (1965). The feynman lectures on physics; vol. Ii, chapter 27. American Journal of Physics, 33(9), 750-752. -- https://ve42.co/Feynman27

Hunt, B. J. (2005). The Maxwellians. Cornell University Press.

Müller, R. (2012). A semiquantitative treatment of surface charges in DC circuits. American Journal of Physics, 80(9), 782-788. -- https://ve42.co/Muller2012

Galili, I., & Goihbarg, E. (2005). Energy transfer in electrical circuits: A qualitative account. American journal of physics, 73(2), 141-144. -- https://ve42.co/Galili2004

Deno, D. W. (1976). Transmission line fields. IEEE Transactions on Power Apparatus and Systems, 95(5), 1600-1611. -- https://ve42.co/Deno76
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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The Beauty of a 💧 Drop of Water Rolling down a 🍃 Leaf's Waxy Surface
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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664,378 views Oct 23, 2021

The Birth of Photography: Drawing With Light (and silver iodide)


Technology Connections 1.48M subscribers

Cameras. How do they work?

00:00 Intro
00:32 Camera Obscura
05:37 Conception of photography
06:37 The Daguerreotype process
10:19 Examining a daguerreotype
12:04 The strange viewing properties of the daguerreotype
14:44 The Ambrotype
17:20 The Tintype
19:10 Eastman Kodak and the path to mass-adoption
22:05 120 film format
24:25 A 120 format camera's quirks and features
27:44 Loading it with film
30:52 Using the camera
33:31 Unloading the camera
35:25 Bloopers

436,601 views Nov 5, 2021

Making Film Reveal its Image: the B&W Development Process (Photography Part 2)


Technology Connections 1.48M subscribers

Developers! Developers! Developers! Developers! Developers!

00:00 Intro
01:42 What the emulsion is and how it works
04:53 Preparing the film for development
07:18 A note on developing tank styles and why I prefer plastic tanks
09:16 Loading the 120 film onto the reel
10:42 Developers! Developers! Developers!
12:24 Stand development
15:22 The development process
18:20 Fixer
20:39 Rinsing and Photo-flo
21:53 A Mishap
22:50 Image reveal
23:33 A viewing trick
24:12 Outro, credits, & bloopers
He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

AGelbert

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January 11, 2022

WEBB Space telescope expected to reach Lagrange Point L2 by January 24, 2022

Agelbert NOTE: However, it will be another 5 months or so before we get to see some pictures because it has to cool WAY down to work properly.

WEBB telescope Sunshield

The following graphic explains why this type of telescope belongs in space, not on Earth:

It will be deployed in space near the Sun–Earth L2 Lagrange point, a point in space about 1.5 million kilometers (930,000 mi) from Earth, where its 5 layer kite-shaped sunshield can protect it from warming by the Sun, Earth and Moon at the same time.


Bottom                                                 Top
Engineers Clean JWST Secondary Reflector with Carbon Dioxide Snow




He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. Matt 10:37

 

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