The Roper resonance, also known as P11(1440) or N(1440)1/2+, is an unstable nucleon resonance with a mass of about 1,440 MeV/c2 and with a relatively wide full Breit-Wigner width Γ ≈ 300 MeV/c2. It contains three quarks (up (u) or down (d)) with total spin J = 1/2 and total isospin I = 1/2. In the quark model it is considered to be a radially excited three-quark state with radial quantum number N = 2 and positive parity. The Roper Resonance has been a subject of many studies because its mass is actually lower than three-quark states with radial quantum number N = 1. Only in the late 2000s was the lower-than-expected mass explained by theoretical calculations, revealing a quark core shielded by a dense cloud of mesons. (Wikipedia).
In this video i show pendulum resonance for different length of the rope of pendulum.
From playlist MECHANICS
Follow Christian Löffler: http://www.christian-loeffler.net https://web.facebook.com/christianloefflerofficial https://soundcloud.com/christianloeffler Tracklist: 1. Myiami 2. Athlete 3. Neo 4. Mosaics 5. lid 6. Silk 7. Haul 8. Wilderness 9. Swim
From playlist Classical
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STEP files of this video: http://www.mediafire.com/download/r9r2a5k7zaz2awq/CoaxialPropeller1STEP.zip
From playlist Mechanisms
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Resonance is an interesting phenomenon... but how does it work? In this video we'll look at 4 examples that help us clarify what resonance is and how we've come to use it for our own benefit. 0:00 - Intro, MUSIC! 1:42 - Example 1 - Playground Swing: What is Resonance? 2:46 - Example 2 - T
From playlist Classical Physics by Parth G
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From playlist Differential Equations
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STEP files of this video: http://www.mediafire.com/file/sbmdkpbi72jpxqt/CoaxialPropeller3STEP.zip Inventor files: http://www.mediafire.com/file/wiqakowkey2hfk2/CoaxialPropeller3Inv.zip
From playlist Mechanisms
The first U-boat sunk by a US Naval vessel in the Second World War would seem to be a big deal. However, when USS Roper sank the U-85 in April 1942, the the event was kept secret by the military. The History Guy remembers a nearly forgotten milestone in the Battle of the Atlantic. This
From playlist US History
THG Podcast: Tin Cans: Destroyers and the First Submarines Sunk by the US in Both World Wars
This is an episode of the THG Podcast, which posts to YouTube once every two weeks in addition to regular History Guy content, about a month after it releases to podcast services. Subscribe to the RSS feed: https://feeds.captivate.fm/thehistoryguy/ On today’s episodes we are talking about
From playlist Podcast
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From playlist James Randi | Big Think
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From playlist Cities with More Than One Football Team
Shocked by a Taser - For Science!
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From playlist Science Experiments!
The Giant Squid's Biggest Mystery
*** Please support our video productions - http://www.patreon.com/scifri *** MORE CEPHALOPOD VIDEOS - https://www.youtube.com/playlist?list=PLB2w1JNHV4HSYPPZ0p_OD3kJO9SxlwAOa Deep below the sea surface, giant squid fight off predatory sperm whales--stirring legendary tales of epic battles.
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From playlist Structured Light and Spin-Orbit Photonics - Edited
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From playlist MIT 8.421 Atomic and Optical Physics I, Spring 2014
When provided a kite determine the missing values
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From playlist Properties of Kites
The Hunt For Martin Bormann - Episode 4: A Tale of Two Graves
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From playlist The Hunt for Martin Bormann