Physics Girl

Non notée

Année : 2012

Nombre de saisons : 1

Durée moyenne d'un épisode : 16 minutes

Genre(s) : Intérêt particulier

Physics Girl is a YouTube channel created by Dianna Cowern that adventures into the physical sciences with experiments, demonstrations, and cool new discoveries. Physics Girl has videos for every atom and eve. Mailing address: Physics Girl PO Box 9281 San Diego CA, 92169

Saisons

Saison 1

Épisodes

Choisissez votre saison au dessus et découvrez les épisodes qui vous attendent !

Épisode 26 - How to Make a Hurricane on a Bubble

18 août 2015

How do scientists mimic the physics of a hurricane on the surface of a bubble? What other types of crazy research are bubbles used for? Learn how to create colorful vortices on a bubble in your kitchen! instagram.com/thephysicsgirl facebook.com/thephysicsgirl twitter.com/thephysicsgirl physicsgirl.org Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Physics Girl has joined PBS Digital Studios! https://www.youtube.com/user/pbsdigitalstudios RESOURCES University of Bordeaux Experiment footage - CNRS http://videotheque.cnrs.fr/video.php?urlaction=visualisation&method=QT&action=visu&id=4175&langue=EN NASA Hurricane Footage https://www.youtube.com/watch?t=10&v=Z3Z_WuY_434 ttps://www.youtube.com/watch?v=yt6xI2p4kcU http://solarsystem.nasa.gov/multimedia/video-view.cfm?Vid_ID=3102 NASA bubbles in Space https://www.youtube.com/watch?v=cXsvy2tBJlU Paper on Hurricane Vortices: http://www.nature.com/srep/2013/131213/srep03455/full/srep03455.html Meuel, T., Xiong, Y. L., Fischer, P., Bruneau, C. H., Bessafi, M. and Kellay, H. Intensity of vortices: from soap bubbles to hurricanes. Scientific Reports 3, Article number: 3455 (2013). Footage used with permission from Hamid Kellay. Paper on Knotted Vortices: http://www.nature.com/nphys/journal/v9/n4/full/nphys2560.html Kleckner, D and Irvine, W. T. M. Creation and dynamics of knotted vortices. Nature Physics 9, 253–258 (2013) Footage used with permission from Dustin Kleckner. Paper on Popping Bubbles: http://www.sciencemag.org/content/340/6133/720 R. I. Saye and J. A. Sethian, Multiscale Modeling of Membrane Rearrangement, Drainage, and Rupture in Evolving Foams, Science, 340(6133), 720–724 (2013). Footage used with permission from James Sethian and Robert Saye For suggestions on how to set up lighting for filming bubbles, check out ShanksFX video here https://www.youtube.com/watch?v=ODfj3Tw6oE4

Épisode 52 - Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

14 juin 2016

Making Music with a Tesla Coil: https://youtu.be/KGhNgeg9IAw Watch a soda can rip itself apart in a fiery explosion at 11,000fps with a Phantom high speed camera. Running a current through a coil, produces an electromagnet. Turn up the voltage in this experiment, and make that current strong enough, and your electromagnet can rip a soda can in half. Or rather, make the can rip itself in half! This video was filmed at Arc Attack Studios in Austin, TX with Joe Hanson, Joe DiPrima, John DiPrima and Darren Dyk. This video is sponsored by Audible - http://audible.com/physicsgirl 360 Tesla Coil Video: https://youtu.be/2SNcbNlbyVo It’s Okay to Be Smart Channel: https://www.youtube.com/itsokaytobesmart ArcAttack: https://www.facebook.com/arc.attack/ Beyond Slow Motion: https://www.youtube.com/user/BeyondSlowMotion Use Induction to make your own DIY Electric Train: https://www.youtube.com/watch?v=9k7zywli4Vg Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator: Dianna Cowern Editor: Jabril Ashe Animator: Kyle Norby How the quarter shrinking demo works: A coil of wire is wrapped around the quarter so it follows the edge of the quarter. Then a capacitor - kind of like a battery - is charged until it’s at a VERY high-voltage, which is then discharged through the wire. The current produced is high enough to make you go bye bye. The coil becomes an electromagnet - because current —≥ magnetic field But this magnetic field creates another current or set of currents in the quarter - because changing magnetic field —≥ current in a circuit. But moving charges, i.e. currents, in a magnetic field will feel a force. For the quarter, the charges moving in the edge are feeling a force inward. The current was SO strong that the quarter PULLED ITSELF inward! This is madness. http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Music: APM and YouTube "On the Bach" “Built Together Marimba“ “The Bumbling Professor“ “Built Together Soundscape“ Provided by ArcAttack: “1812 Overture” For Science!

Épisode 57 - Does height matter in sports?

10 août 2016

Some sports attract tall athletes and some are dominated by athletes with a shorter stature. The study of allometry investigates how strength scales with height. According to science, what are the reasons that certain sports attract tall or short athletes, besides the obvious (basketball nets are easier to reach if you’re taller)? Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator: Dianna Cowern Writer: Sophia Chen Editor: Jabril Ashe Animator: Kyle Norby http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Copa America/Messi footage: beIN Sports ttps://www.youtube.com/watch?v=kNBz4pc6WNk Michael Phelps Swim: Olympic Channel https://www.youtube.com/watch?v=2alP2ZlmmFA Gabby Douglas flips: USA Gymnastics https://www.youtube.com/watch?v=vggVYLD9RjY ‘Simone Biles and David Lee photo credit: twitter.com/Simone_Biles Static sports image: IOC Olympic diver photo: IOC/MINE KASAPOGLU https://www.olympic.org/photos/rio-2016/diving Olympic volleyball player photo: IOC/JOHN HUET https://www.olympic.org/photos/rio-2016/beach-volleyball Olympic swimmer photo: IOC/CHRIS FURLONG https://www.olympic.org/photos/london-2012/swimming Olympic gymnast photo: IOC/JASON EVANS https://www.olympic.org/photos/rio-2016/gymnastics-artistic Gymnastics Footage: USA Gymnastics https://www.youtube.com/watch?v=Zol8rFCNetQ https://www.youtube.com/watch?v=qDRgpML6f8o https://www.youtube.com/watch?v=yo_efL_jEcs NEED: Gymnastics footage of the white guy on the rings NEED: Diving Footage 1t 1:51: Oympic Channel NEED: Michael Phelps slow motion footage: ARTE https://www.youtube.com/watch?v=tAzYr4MUwGg Soccer Footage: FOX Sports https://www.youtube.com/watch?v=PGmmF4DSsC8 WNT https://www.youtube.com/watch?v=4CIMvtdHmeo Bundesliga https://www.youtube.com/watch?v=y6ckzqciZPA FIFA TV https://www.youtube.com/watch?v=0B4q6di-3fg Footage of my sister Alicia doing gymnastics courtesy of Alicia Stock Images: Pixabay and Clker Music: APM Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator: Dianna Cowern Writer: Sophia Chen Editor: Jabril Ashe Animator: Kyle Norby http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Copa America/Messi footage: beIN Sports ttps://www.youtube.com/watch?v=kNBz4pc6WNk Michael Phelps Swim: Olympic Channel https://www.youtube.com/watch?v=2alP2ZlmmFA Gabby Douglas flips: USA Gymnastics https://www.youtube.com/watch?v=vggVYLD9RjY ‘Simone Biles and David Lee photo credit: twitter.com/Simone_Biles Static sports image: IOC Olympic diver photo: IOC/MINE KASAPOGLU https://www.olympic.org/photos/rio-2016/diving Olympic volleyball player photo: IOC/JOHN HUET https://www.olympic.org/photos/rio-2016/beach-volleyball Olympic swimmer photo: IOC/CHRIS FURLONG https://www.olympic.org/photos/london-2012/swimming Olympic gymnast photo: IOC/JASON EVANS https://www.olympic.org/photos/rio-2016/gymnastics-artistic Gymnastics Footage: USA Gymnastics https://www.youtube.com/watch?v=Zol8rFCNetQ https://www.youtube.com/watch?v=qDRgpML6f8o Soccer Footage: https://www.youtube.com/watch?v=PGmmF4DSsC8 WNT vs Switz Source: Fox Stock Images: Pixabay Music: APM

Épisode 73 - Why aren't plants black? ?

22 février 2017

Why are plants green? Is there a reason plants evolved to be green, globally? What does it have to do with the color of the sunlight coming down through our atmosphere? If you liked this video check out these: Bandaids Glow when Opening?! | EVERYDAY MYSTERIES https://www.youtube.com/watch?v=DIILDg2d3Yk Why Hawaii's volcano is so UNUSUAL https://www.youtube.com/watch?v=k0tnqPmwWvk http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator: Dianna Cowern Editor: Jabril Ashe Hamburger eater: Jabril Ashe Colorful Planet Artist: Ashley Warner Thanks to: Dan Walsh, Kyle Kitzmiller, Joe Hanson and Kyle Norby Sources: Black Nigrescens Plant: http://www.thedangergarden.com/2013/02/ophiopogon-planiscapus-nigrescens-my.html With permission from Loree Bohl, thedangergarden.com Green Nigrescens Plant: With permission from © Davis Landscape Architecture, London, UK http://www.davisla.com Solar spectrum adapted from: https://commons.wikimedia.org/wiki/File:Solar_Spectrum.png Chlorophyll spectrum adapted from: http://www.austincc.edu/biocr/1406/labm/ex7/prelab_7_4.htm The Functional Significance of Black-Pigmented Leaves: Photosynthesis, Photoprotection and Productivity in Ophiopogon planiscapus ‘Nigrescens’ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3691134/ Functional evolution of photochemical energy transformations in oxygen-producing organisms http://www.publish.csiro.au/FP/pdf/FP09087 Evolutionary Competition Between Primitive Photosynthetic Systems: Existence of an early purple Earth? http://adsabs.harvard.edu/abs/2006AAS...209.0605S A Compilation of Selected Data on Solar Radiation at Sea Level http://www.dtic.mil/dtic/tr/fulltext/u2/646355.pdf Green Light Drives CO2 Fixation Deep Within Leaves http://pcp.oxfordjournals.org/content/39/10/1020.full.pdf+html Green Light Drives Leaf Photosynthesis More Efficiently than Red Light in Strong White Light: Revisiting the Enigmatic Question of Why Leaves are Green http://pcp.oxfordjournals.org/content/50/4/684.full.pdf+html http://msue.anr.msu.edu/news/green_light_is_it_important_for_plant_growth https://www.researchgate.net/publication/40900745_Cost_and_color_of_photosynthesis http://www.annualreviews.org/doi/abs/10.1146/annurev-arplant-042110-103811 The sensitivity of the human eye to different colors https://www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/Sample-Chapter.pdf Music: APM

Épisode 112 - SUNSCREEN in UV

21 juillet 2018

How to Make Everything Video: https://youtu.be/lMXAY5F28L0 Veritasium Video: https://www.youtube.com/watch?v=V9K6gjR07Po To learn more about CuriosityStream, go to http://curiositystream.com/physicsgirl If you liked this video check out these: What stretching actually does to your body ft. Sofie Dossi https://www.youtube.com/watch?v=1JgBp7dX4AU Bandaids Glow when Opening?! | EVERYDAY MYSTERIES https://www.youtube.com/watch?v=DIILDg2d3Yk Creator: Dianna Cowern Videography: Chris Peck, Dianna Cowern, Derek Muller and Eric Birkemeier Editing: Jabril Ashe Thanks to Dan Walsh, and congratulations on his PhD! Thanks to Kyle Kitzmiller and Unicorn Snot Subscribe to Physics Girl for more unusual phenomena and riddles. https://www.youtube.com/subscription_center?add_user=physicswoman Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Twitter: http://twitter.com/thephysicsgirl Facebook: http://facebook.com/thephysicsgirl Instagram: http://instagram.com/thephysicsgirl Resources and Further reading: “The Food and Drug Administration (FDA) is proposing to limit the maximum labeled SPF value for over-the-counter (OTC) sunscreen drug products to ‘‘50+.’ https://www.gpo.gov/fdsys/pkg/FR-2011-06-17/pdf/2011-14769.pdf NYT Article on SPF 50 https://www.nytimes.com/2011/06/15/science/15sun.html FDA: Understanding over the counter sunscreens https://www.fda.gov/drugs/resourcesforyou/consumers/buyingusingmedicinesafely/understandingover-the-countermedicines/ucm258468.htm Sunscreen Penetration of Human Skin and Related Keratinocyte Toxicity after Topical Application https://www.karger.com/Article/Abstract/85861 Regulatory Policy Information for the Sunscreen Innovation Act (information on FDA’s rejection of new sunscreen ingredients) https://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/ucm434843.htm https://www.ncbi.nlm.nih.gov/pubmed/15908756 NEW SIA (sunscreen innvation act): https://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/ucm434782.htm Schedule of sunscreen lettesr: https://www.fda.gov/Drugs/GuidanceComplianceRegulatoryInformation/ucm434843.htm FDA blog safety and effectiveness data: https://blogs.fda.gov/fdavoice/index.php/2016/11/fdas-sunscreen-guidance-outlines-safety-and-effectiveness-data-recommended-for-additional-active-ingredients/ Sunscreen + coral reefs https://www.washingtonpost.com/news/energy-environment/wp/2018/07/02/hawaii-is-about-to-ban-your-favorite-sunscreen-to-protect-its-coral-reefs/?noredirect=on&utm_term=.bba2187271ad ”SPF 100 vs 50 study” https://www.sciencedirect.com/science/article/pii/S0190962217329080 Screenshot of “health blog” https://www.huffingtonpost.com.au/2016/11/29/chemical-versus-physical-sunscreen-whats-the-difference_a_21616016/ Overview of suncreen ingredients https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3543289/ “Titanium dioxide and zinc oxide provide UV protection primarily via absorption of UV radiation and not through significant reflection or scattering.” https://onlinelibrary.wiley.com/doi/abs/10.1111/phpp.12214 From the FDA’s website: “Although the protective action of sunscreen products takes place on the surface of the skin, there is evidence that at least some sunscreen active ingredients may be absorbed through the skin and enter the body” https://www.fda.gov/Drugs/ResourcesForYou/Consumers/BuyingUsingMedicineSafely/UnderstandingOver-the-CounterMedicines/ucm239463.htm#ingredients In 2014, the FDA updated sunscreen ingredient proposal rules https://www.fda.gov/drugs/guidancecomplianceregulatoryinformation/ucm434782.htm

Épisode 127 - I Visited the First Gravitational Wave Detector! LIGO | STELLAR

27 juin 2019

Thank you to Draper and its Hack the Moon initiative for supporting PBS Digital Studios | Learn more at https://wehackthemoon.com We’ve been waiting to verify the existence of Gravitational Waves for over 100 years and I actually got to go to LIGO to see exactly how they proved it! I know, this video is a bit different from most Physics Girl videos. It's part of a new PBS miniseries called Stellar, done in collaboration with Matt O’Dowd from @PBSSpacetime and Joe Hanson from @It'sOkayToBeSmart. Over six episodes we travel to telescopes, go inside space research centers, and chat with amazing scientists. Next up is Joe's episode where he visits one of the telescopes that was part of world-spanning Event Horizon Telescope. Check out the other episodes in this series: The Quasar from The Beginning of Time | STELLAR https://www.youtube.com/watch?v=cqCPnXHKO5c Seeing a Black Hole with a Planet-Sized Telescope | STELLAR https://www.youtube.com/watch?v=gUpKta9yfCk&feature=youtu.be You'll be able to see future episodes on the Physics Girl, Space Time and It’s Okay to be Smart YouTube channels, as well as the PBS Digital Studios Facebook page. Stellar is a part of the PBS Summer of Space. They'll be lots of awesome space related content all summer long on PBS. See what's happening at https://www.pbs.org/summer-of-space/ #SummerOfSpacePBS #astrophysics #space Special Thanks to Michael Landry, Amber Strunk, and the whole LIGO Hanford team for all their help making this episode. Hosted by Dianna Cowern Written by: Sophia Chen, Dianna Cowern, Andrew Kornhaber, Eric Brown Directed by: Eric Brown and Andrew Kornhaber Producer: Randa Eid Director of Photography: Eric Brouse Sound: Theodore Kinney Production Assistant: Alexander Robino Editing: Pavel Ezrohi Graphics: Murilo Lopes Assistant Editing: Daniel Sircar Produced By: Kornhaber Brown

Épisode 131 - Testing what exercise actually does to your butt

4 août 2019

Check out Cassey's Video! https://youtu.be/AW6TZVwP-FA New Merch Launched! https://store.dftba.com/collections/physics-girl Cassey and I investigate the biomechanics of butts. What activates your butt muscles more, running or squatting? How effective are bridges as a butt workout? How much can we change the shape of our bodies with exercise? Huge thanks to Dr. Rowley for having us invade his lab for the day! You can check him out on facebook here http://www.facebook.com/kmichaelrowley If you liked this video check out these collaborations: What stretching actually does to your body ft. Sofie Dossi https://www.youtube.com/watch?v=1JgBp7dX4AU Why this skateboarding trick should be IMPOSSIBLE ft. Rodney Mullen https://www.youtube.com/watch?v=yFRPhi0jhGc http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Dr. Rowley's thesis on figure skaters: https://www.ncbi.nlm.nih.gov/pubmed/25775364 Sources: Sports and Gluteus Maximus Size: 'The cross-sectional area of the gluteus maximus muscle varies according to habitual exercise loading: Implications for activity-related and evolutionary studies' https://www.sciencedirect.com/science/article/pii/S0018442X15000761 Meta-analysis 1 'Twin study of genetic and environmental influences on adult body size, shape, and composition' https://genepi.qimr.edu.au/contents/publications/staff/CVPV080.pdf Meta-analysis 2 'The Beneficial Effects of Physical Activity: Is It Down to Your Genes? A Systematic Review and Meta-Analysis of Twin and Family Studies' https://sportsmedicine-open.springeropen.com/articles/10.1186/s40798-016-0073-9 Meta-analysis 3 'Variability in the heritability of body mass index: a systematic review and meta-regression' https://www.frontiersin.org/articles/10.3389/fendo.2012.00029/full Creator/Host: Dianna Cowern Editor: Levi Butner Research & Writing: Dianna & Imogen Ashford

Épisode 137 - Why This Stuff Costs $2700 Trillion Per Gram - Antimatter at CERN

14 novembre 2019

Physics Girl is on Patreon! ►► https://www.patreon.com/physicsgirl There’s a factory in Europe that makes antimatter! It’s the rarest, most expensive, and potentially the most dangerous material on earth. Scientists don’t know why this material is so rare. Anti-atoms took 72 years after we discovered antimatter to make. Why? Thanks to CERN, Elise Wursten, Loïc Bommersbach and Sarah Charley http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Creator/Host: Dianna Cowern Editor: Levi Butner Research & Writing: Sophia Chen & Dianna & Imogen Ashford Sources: Current estimate of Antimatter, courtesy of Elise: Stefan Ulmer made a back-of-the-envelope calculation based on energy and power consumption. The explanation goes as follows: 1. CERN produces 3e7 antiprotons per AD cycle or about 1e15 per year 2. This is about 1e15*1.67e-27kg = 1.67 nanogram per year 3. 1 gram of antiprotons has an energy (E=mc^2) of 9e13 Joule 4. The efficiency of the antiproton production process is 1e-9, so you need a billion times more energy: 9e22 Joule 5. The cost of power for CERN is 1kWh = 3.6e6 Joule = 0.1 euro 6. So that would make 0.1/3.6e6*9e22 = 2.5e15 euro 7. And it would take CERN 6e8 years https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19990110316.pdf (1999) https://nuclearsecrecy.com/nukemap/ - you can see the nuke city Mass of Fish: "Contribution of Fish to the Marine Inorganic Carbon Cycle" http://rsmas.miami.edu/groups/grosell/PDFs/2009%20Wilson%20et%20al.pdf https://web.archive.org/web/20120105085146/http://public.web.cern.ch/public/en/spotlight/SpotlightAandD-en.html Dirac’s attitude about the positive solution to his equation https://www.newscientist.com/article/dn17111-how-dirac-predicted-antimatter/ Dave’s Essay: http://multimidia.ufrgs.br/conteudo/frontdaciencia/dirac%20antimatter%20paper.pdf Questions at CERN https://public-archive.web.cern.ch/en/LHC/WhyLHC-en.html Creating Antihidrogen: https://home.cern/science/physics/antimatter/storing-antihydrogen https://public-archive.web.cern.ch/en/LHC/WhyLHC-en.html

Épisode 140 - This thing is -270°C and is EVERYWHERE

21 janvier 2020

Download the PBS Video App: https://www.pbs.org/pbs-video-app/ The universe is microwaving itself. A mystery signal discovered in the 1960s led to a Nobel prize. In this video, Dianna explores one of the most mysterious discoveries in physics - a constant microwave signal that seemed to be coming from everywhere in the universe. It turned out to be light from an unusual process 13.8 billion years ago. Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Vincent Flores. Join the Physics Girl Patreon community! ►► https://www.patreon.com/physicsgirl Check out MinutePhysics - Why do compressed air cans get cold? https://www.youtube.com/watch?v=kjraelDMrFQ If you liked this video check out these: Why is the universe flat? https://www.youtube.com/watch?v=MTUsOWtxKKA How the Edge of our Galaxy Defies Known Physics https://www.youtube.com/watch?v=c6Eq2sI1NDY MANY thanks to: Nick Lucid, Katie Mack, Derek Muller, Henry Reich, Thom Ory and Edward Wright for helping with this video! Thanks to Levi Butner for inspiriting the idea for this video by asking me WAY too many questions during work! 🙂 http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Creator/Host: Dianna Cowern Editor: Levi Butner Writing: Valerie Bentivegna Research/Copy Editing: Dianna Cowern Sources: Temperature and wavelength of original CMB: http://www.astro.uvic.ca/~jwillis/teaching/astr405/astr405_lecture3.pdf http://www.astronomy.ohio-state.edu/~ryden/ast162_9/notes39.html ESA Planck References: http://www.esa.int/Science_Exploration/Space_Science/Planck NASA WMAP Reference: https://map.gsfc.nasa.gov Interview with John G. Cramer (via email) https://kipac.stanford.edu/highlights/understanding-dark-energy-through-cmb-observations Nobel prize photo - Alexander Mahmoud 2018 https://www.aps.org/publications/apsnews/200207/history.cfm

Épisode 141 - How rainbows with NO COLOR are possible

7 février 2020

What the heck are spider-web rainbows? What are these rare white rainbows, and how do they form? If you liked this video check out these: Does this look WHITE to you? https://www.youtube.com/watch?v=uNOKWoDtbSk The Projector Illusion: https://www.youtube.com/watch?v=Xp6bxCh_p7c Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, Dave Butler, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Zalster. Join the Physics Girl Patreon community! ►► https://www.patreon.com/physicsgirl Thanks to: Brussels Airport (@BrusselsAirport) / Twitter, NWS Key West (@NWSKeyWest) / Twitter, Phil Plait (@BadAstronomer), Chris Cox, (c) Timm Chapman - www.timmchapman.com, Alex Tudorica, Colin Leonhardt at Birdseye View Photography, Craig Gardner (@rcraiggardner) / Twitter, Pascal (@Pascal_Brunet) / Twitter, Fabio de Albuquerque (@fabio914) / Twitter, Justin Hoover (@baselogik) / Twitter, Kayden Morrison. http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Creator/Host: Dianna Cowern Editor: Levi Butner Production Assistance: Heather Dewis Sources: The mathematical physics of rainbows and glories John A. Adam https://ww2.odu.edu/~jadam/docs/rainbow_glory_review.pdf Raindrop and mist droplet sizes: https://www.nasa.gov/feature/goddard/2016/size-matters-nasa-measures-raindrop-sizes-from-space-to-understand-storms https://www.usgs.gov/special-topic/water-science-school/science/are-raindrops-shaped-teardrops?qt-science_center_objects=0#qt-science_center_objects https://www.atoptics.co.uk/droplets/clouds.htm https://www.nist.gov/system/files/documents/el/fire_research/R0200514.pdf https://adele.faculty.ucdavis.edu/research/projects/cloud-dsd/ https://www.atoptics.co.uk/droplets/fogform.htm http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/fogbow.html http://media.bom.gov.au/social/blog/1807/explainer-what-is-fog/ http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/mch/diff.rxml Screenshotted articles about Fogbows/White Rainbows https://www.realsimple.com/holidays-entertaining/entertaining/seasonal-events/white-rainbow

Épisode 143 - HOME CHALLENGE: 20 Easy Experiments in 5 mins for Bored Adults and Kids at School Inside

20 mars 2020

Are you a bored adult or a parent stuck at home? Try these DIY science experiments! Join my Patreon Community! ▶▶▶ http://patreon.com/physicsgirl SAFETY TIPS FOR TEA BAG ROCKET • Flammable surfaces: DO NOT light tea bags on a flammable surface. Experiment should be conducted on a fireproof surface, like a metal pan. • Smoke detectors: Do not light tea bags under or near smoke detectors • Safety Glasses: Safety glasses should be used • Touching fire: Do not allow anyone else to touch the lighter or the burning tea bag • Falling ash: Be aware! Some ashes may be produced from the teabag, and they may fly into the air. Experiments in this video: 1. making a cloud in your mouth 0:22 2. moving water with static electricity from a balloon 00:40 3. demonstrating the Leidenfrost effect 00:55 4. dipping a can with boiling water into ice water 01:12 5. opening a can with pressure and a marker 01:23 6. raising water level in a jar by putting candle out 01:37 7. re-lighting a candle from the smoke 02:03 8. put out a candle with CO2 from vinegar and baking soda 02:09 9. turning empty tea bags into rockets by lighting on fire (02:30) 10. eating up needles until they’re no longer magnetic (02:55) 11. floating a ping pong on a stream of air from a straw (03:39) 12. balancing forks and a toothpick on a single toothpick (03:44) 13. pouring water from one glass to another with a string (04:02) 14. spinning a hard-boiled egg until it stands up (04:19) 15. using a card to turn a glass with water upside down (04:30) 16. observing properties of corn syrup with polarized lenses (4:35) 17. DIY lava lamp with water, oil, and alka seltzer (04:46) 18. throwing an egg at a sheet (without it breaking) (04:55) 19. creating a non-newtonian fluid that glows with tonic water and cornstarch (05:11) 20. knocking eggs propped up by toilet paper rolls into glasses (05:26) More DIY experiments: Seven Surface Tension Experiments: https://www.youtube.com/watch?v=WsksFbFZeeU 5 weird ways to put out a candle: https://www.youtube.com/watch?v=WainnKKtGZI Glowing Band-Aids: https://www.youtube.com/watch?v=DIILDg2d3Yk Stacked ball drop: https://www.youtube.com/watch?v=2UHS883_P60 Special thanks to our Sally Ride Patrons: Alejandro Gutierrez, Brian O'Connell, Darkbit, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, and Zalster Thanks to Derek Muller and Patrick Morgan for advising on this video! More Physics Girl: http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Creator/Host: Dianna Cowern Editor: Levi Butner Thanks to: Hope Butner, Kyle Kitzmiller, Derek Muller and Patrick Morgan Are you Social Distancing? Looking for Self Isolation activities? Fun DIY home activities for adults and kids.

Épisode 144 - Ballistic Ping Pong Ball vs. Tennis Ball at 450km/h!

11 avril 2020

What happens when you shoot a ballistic ping pong ball going 450kph at a tennis ball? Check out Brandon’s iPhone video on GizmoSlip: https://youtu.be/JYivWedGCKc Support more physics content like this by joining our Patreon community! http://patreon.com/physicsgirl Many things to my Sally Ride Level Patrons on Patreon Sally Rides: Alejandro Gutierrez, Brian O'Connell, Darkbit, David Cichowski, Edi, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, Vikram Bhat, wc993219, Zalster More Physics Girl videos you might like: How the edge of our galaxy defies known physics https://www.youtube.com/watch?v=c6Eq2sI1NDY Singing this note is IMPOSSIBLE https://www.youtube.com/watch?v=F64xcPKKES8 We turned this TRUCK into a Giant Camera! https://www.youtube.com/watch?v=qIp9kItDUh8 Thanks to Kyle Kitzmiller, Ed Ivory, Brandon and Darren from GizmoSlip, Check out Darren’s channel at http://youtube.com/beyondslowmotion More Physics Girl: http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Check out the car crash testing educational materials at https://classroom.iihs.org/ Resources: Car Crash Testing Footage used with permission from IIHS at https://www.iihs.org FAA Explosive Decompression: https://www.faa.gov/pilots/training/airman_education/media/ac%2061-107a.pdf Moon atmosphere: https://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html Vacuum at CERN: https://home.cern/science/engineering/vacuum-empty-interstellar-space https://www.wired.com/story/lego-bugatti-chiron/ Fiat Specs https://www.edmunds.com/fiat/500/2019/features-specs/ High G Training https://en.wikipedia.org/wiki/High-G_training#/media/File:20G_centrifuge.jpg https://news.google.com/newspapers?id=iEIfAAAAIBAJ&sjid=VdAEAAAAIBAJ&pg=4123%2C5598453 https://www.military.com/video/rockets/aircraft-rockets/human-g-force-testing-at-1000kmh/663113048001 https://en.wikipedia.org/wiki/John_Stapp#/media/File:Rocket_sled_track.jpg https://vimeo.com/292235615 Other Stock Footage and Photos: Pixabay Music: APM Music

Épisode 148 - Are planes safe during COVID?

29 juillet 2020

How likely are you to get sick on an airplane? How safe are airplanes? The science of ventilation and bioaerosol research. If you liked this video, check out: What stretching actually does to your body: https://www.youtube.com/watch?v=1JgBp7dX4AU Only some humans can see this type of light: https://www.youtube.com/watch?v=CSu0cV3fqi8 Creator/Host: Dianna Cowern Video Editing: Levi Butner Research/writing: Sophia Chen Writing/Editing: Dianna Cowern Special thanks to our Sally Ride Patrons! Special thanks to our Sally Ride level patrons: Alejandro Gutierrez, Brian O'Connell, David Cichowski, Fabrice Eap, Henning Bitsch, Kenneth Hunter, Margaux Lopez, Patrick Olson, Vikram Bhat, wc993219. Join the Physics Girl Patreon community! ►► https://www.patreon.com/physicsgirl Thanks to Malin Alsved, Hope Butner and Kyle Kitzmiller. http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl Credits: Some Stock footage provided by Videvo, downloaded from www.videvo.net Resources: https://pdfs.semanticscholar.org/3a69/98741b1e14fe3e15d5fe0bc6ed4e58d83475.pdf?_ga=2.94557724.129545850.1594340593-1120174445.1589328977 [1977 info and H1n1 stat are in Lei 2017, with further details about 1977 flight here: http://blog.h1n1.influenza.bvsalud.org/en/2009/09/28/influenza-air-transmission/] [THERE’S THIS VERY COMPREHENSIVE TABLE OF RECOMMENDATIONS FROM A TRADE ASSOCIATION, THAT IS COOL TO JUST RUN THROUGH. YOU CAN PICK THE EXAMPLES YOU LIKE, BUT I’LL JUST HIGHLIGHT A FEW THAT I FOUND INTRIGUING.] https://www.ashrae.org/File%20Library/Technical%20Resources/Standards%20and%20Guidelines/Standards%20Addenda/62-2001/62-2001_Addendum-n.pdf [Source: https://www.designingbuildings.co.uk/wiki/Indoor_air_velocity] http://epibulletins.dhss.alaska.gov/Document/Display?DocumentId=888 https://www.smithsonianmag.com/smart-news/study-maps-how-flu-virus-moves-around-plane-180968541/ Transmission of COVID-19 virus by droplets and aerosols: A critical review on the unresolved dichotomy https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7293495/ https://lbourouiba.mit.edu/sites/default/files/documents/14BourouibaBush-sneezecloudJFM_corrected.pdf https://up.codes/s/outdoor-airflow-rate https://www.technologyreview.com/2020/07/07/1004841/a-group-of-239-scientists-say-theres-growing-evidence-covid-19-is-airborne/?itm_source=parsely-api Timeline of COVID-19 https://www.who.int/emergencies/diseases/novel-coronavirus-2019/events-as-they-happen https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it#:~:text=The%20International%20Committee%20on%20Taxonomy,two%20viruses%20are%20different. Ventilation rates on airplanes: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.304.7321&rep=rep1&type=pdf Ventilation rates inside: https://www.epa.gov/indoor-air-quality-iaq/how-much-ventilation-do-i-need-my-home-improve-indoor-air-quality Transmission rates on airplanes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7165818/

Épisode 162 - Work and Energy - Physics 101 / AP Physics 1 Review with Dianna Cowern

12 novembre 2020

Lesson 9 (Work and Energy) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! Exercises in this video: 1. A rocket pushes a space cow, from rest, with a Force of 100N, over a distance of 10m. How much work did the rocket do? What is the final kinetic energy of the cow? How fast is the cow moving? 2. You lift a 10kg cow, with a constant velocity, 10m up. How much work did you do? How much potential energy is stored in the gravitational field? 3. You drop the cow 10m onto a big cow airbag. How fast was the cow moving right before she hit the airbag? How fast would a cow with twice as massive be moving with the same setup? 4. A giant wrecking ball with 80kg mass, is dropped from a height of 35m. It bounces off of a trampoline and reaches a height of 14m on the return trip. How much energy was lost to heat in the bounce? 5. A square cow slides down a frictionless ramp, starting at a height h above the ground. At the bottom the cow starts sliding along the ground. How far does the cow slide, in terms of m, g, h, and u, where u is the coefficient of friction between the cow and the ground? [u is mu] Special thanks to Mark Rober for his encouraging shoutout and to Simone Giertz for letting me almost hit myself in the face with a bowling ball at her workshop. Credits: Dianna Cowern - Executive Producer/Host/Writer Jeff Brock - Lead Writer/Course Designer Laura Chernikoff - Producer Kaitlyn Ali - Video Editor Sophia Chen - Researcher/Writer Erika K. Carlson - Researcher/Writer Hope Butner - Production Assistant Levi Butner - Videographer Lauren Ivy - Set Design Vanessa Hill - Consulting Producer Aleeza McCant - Illustrator Rachel Allen - Illustrator Consultant - Kyle Kitzmiller Lucy Brock, Samantha Ward - Curriculum Consultants Cathy Cowern - Transcription

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Épisodes

Épisode 1 - Amusing Surface Tension Experiment

Épisode 2 - How the Hippies Saved Physics | EXPERT ANSWERS PHYSICS GIRL QUESTIONS

Épisode 3 - What can you do with a physics degree? Take 2

Épisode 4 - How to float a ping pong ball on air - The Coandă Effect

Épisode 5 - What's in the darkest part of the sky? The Hubble Deep Field

Épisode 6 - Singing plates - Standing Waves on Chladni plates

Épisode 7 - What is Color? Flame Challenge Winner 2014

Épisode 8 - What is Dark Matter? A Mystery of the Universe

Épisode 9 - The Physics Behind a Curveball - The Magnus Effect

Épisode 10 - The Vomit Comet ft. Emily Calandrelli | EXPERT ANSWERS PHYSICS GIRL QUESTIONS

Épisode 11 - The Physics of Weightless Flight ft Emily Calandrelli

Épisode 12 - Cosmic Inflation with Alan Guth | EXPERT ANSWERS PHYSICS GIRL QUESTIONS

Épisode 13 - What's the difference between a solar and lunar eclipse?

Épisode 14 - Why is the universe flat?

Épisode 15 - Crazy pool vortex

Épisode 16 - Fun with Vortex Rings in the Pool

Épisode 17 - How Rainbows Form

Épisode 18 - Stacked Ball Drop

Épisode 19 - Why do mirrors flip horizontally (but not vertically)?

Épisode 20 - Calculating Pi with Darts

Épisode 21 - Special Relativity and the Twin Paradox

Épisode 22 - 7 Science Tricks with Surface Tension

Épisode 23 - Seeing the Smallest Thing in the Universe

Épisode 24 - Quarks Explained in Four Minutes - Physics Girl

Épisode 25 - New Horizons first probe to reach pluto!

Épisode 26 - How to Make a Hurricane on a Bubble

Épisode 27 - How to Make a Cloud in Your Mouth

Épisode 28 - Can you take perfect 3D photos?

Épisode 29 - How 3D holograms work

Épisode 30 - Epic Space Rescues ft. BrainCraft

Épisode 31 - Does this look white to you?

Épisode 32 - AMAZING! Ferrofluid + Glow Sticks

Épisode 33 - Can you solve the boat puzzle?

Épisode 34 - Avoid electric shock getting out of a car!

Épisode 35 - Are MRIs safe?

Épisode 36 - Are perpetual motion machines possible?

Épisode 37 - 5 physics experiments for the holidays!

Épisode 38 - 5 AMAZING stars we’ve discovered in space!

Épisode 39 - Spaceships pushed by LIGHT – the future of space travel?

Épisode 40 - The black hole death problem

Épisode 41 - 5 weird ways to put out a candle

Épisode 42 - Gravitational Waves Discovered for the First Time!

Épisode 43 - Quantum Cryptography Explained

Épisode 44 - Is energy always conserved?

Épisode 45 - Can you call a cell phone in the microwave?

Épisode 46 - How does laser cooling work?

Épisode 47 - Could you replace your eye with a camera?

Épisode 48 - How science explains monster waves

Épisode 49 - BIZARRE spinning toys

Épisode 50 - How SMOOTHNESS of a SOCCER BALL affects curve!

Épisode 51 - World’s Easiest DIY Electric Train

Épisode 52 - Exploding soda cans with electromagnets in SLOW MOTION ft Joe Hanson

Épisode 53 - Should you go to Mars? ft Bill Nye

Épisode 54 - How to Shrink a Quarter with Electricity

Épisode 55 - Can you solve this pier puzzle?

Épisode 56 - What are antibubbles?

Épisode 57 - Does height matter in sports?

Épisode 58 - 5 Awesome Science Party Tricks!

Épisode 59 - 5 Science Tricks w/ Explanation

Épisode 60 - How do touchscreens work?

Épisode 61 - The ULTRAVIOLET CATASTROPHE

Épisode 62 - 5 cool math tricks ft. Technicality

Épisode 63 - Can explosions work in space?

Épisode 64 - How tall is this building?

Épisode 65 - Solving crimes with INFRARED?

Épisode 66 - How to control light with water

Épisode 67 - My dad was stuck by lightning (TWICE!)

Épisode 68 - DIY Lightning Experiment! Make a SHOCKING Capacitor

Épisode 69 - Can you solve these physics riddles? ft Simone Giertz - Part 1/3

Épisode 70 - The Boat/Rock Brainteaser ft Simone Giertz part 2/3

Épisode 71 - Can you solve the burning stick riddle? ft Simone Giertz part 3/3

Épisode 72 - Physics Girl Trailer

Épisode 73 - Why aren't plants black? ?

Épisode 74 - Everything you should know about TRAPPIST-1 exoplanets

Épisode 75 - Why Hawaii's volcano is so UNUSUAL

Épisode 76 - Can you solve the $20 riddle? ft SMBC Comics' Zach Weinersmith

Épisode 77 - Oxygen is MAGNETIC?!