Practice Problem: Electrophilic Aromatic Substitution Multi-Step Pathway

It's now time to dig into quantum field theories with considerably more rigor than earlier in the series. First up is quantum electrodynamics, or QED. This was the first successful QFT, combining quantum mechanics and special relativity. Let's learn what this model is all about, and how to do math with Feynman diagrams.Script by Andrew Mattson, Physics PhD Student at Johns Hopkins UniversityWatch the whole Modern Physics playlist: http://bit.ly/ProfDavePhysics2Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1Mathematics Tutorials: http://bit.ly/ProfDaveMathsGeneral Chemistry Tutorials: http://bit.ly/ProfDaveGenChemOrganic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChemBiochemistry Tutorials: http://bit.ly/ProfDaveBiochemBiology Tutorials: http://bit.ly/ProfDaveBioEMAIL► [email protected]► http://patreon.com/ProfessorDaveExplainsCheck out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!Amazon: https://amzn.to/2HtNpVHBookshop: https://bit.ly/39cKADMBarnes and Noble: https://bit.ly/3pUjmrn Learn more about your ad choices. Visit megaphone.fm/adchoices

Continuing with the invertebrate chordates, we arrive at subphylum Tunicata, also known as the tunicates. There are over 3,000 species within this clade, and the creatures are fascinating. The body of a tunicate is enclosed in a thick covering called a tunic, and they can. become colonial superorganisms which are incredible to observe. Let's get a closer look!Script by Ryan HelcoskiWatch the whole Zoology playlist: http://bit.ly/ProfDaveZooGeneral Chemistry Tutorials: http://bit.ly/ProfDaveGenChemOrganic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChemBiochemistry Tutorials: http://bit.ly/ProfDaveBiochemBiology Tutorials: http://bit.ly/ProfDaveBioAnatomy & Physiology Tutorials: http://bit.ly/ProfDaveAnatPhysMicrobiology Tutorials: http://bit.ly/ProfDaveMicrobioBotany Tutorials: http://bit.ly/ProfDaveBotanyEMAIL► [email protected]► http://patreon.com/ProfessorDaveExplainsCheck out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!Amazon: https://amzn.to/2HtNpVHBookshop: https://bit.ly/39cKADMBarnes and Noble: https://bit.ly/3pUjmrn Book Depository: http://bit.ly/3aOVDlT Learn more about your ad choices. Visit megaphone.fm/adchoices

Moving along with our study of the diversity of the echinoderms, we arrive at class Asteroidea, the sea stars or starfish, and class Ophiuroidea, the brittle stars. How many different kinds of starfish are there? What is their ecological relevance? Let's take a look!Script by Ryan HelcoskiWatch the whole Zoology playlist: http://bit.ly/ProfDaveZooGeneral Chemistry Tutorials: http://bit.ly/ProfDaveGenChemOrganic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChemBiochemistry Tutorials: http://bit.ly/ProfDaveBiochemBiology Tutorials: http://bit.ly/ProfDaveBioAnatomy & Physiology Tutorials: http://bit.ly/ProfDaveAnatPhysMicrobiology Tutorials: http://bit.ly/ProfDaveMicrobioBotany Tutorials: http://bit.ly/ProfDaveBotanyEMAIL► [email protected]► http://patreon.com/ProfessorDaveExplainsCheck out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!Amazon: https://amzn.to/2HtNpVHBookshop: https://bit.ly/39cKADMBarnes and Noble: https://bit.ly/3pUjmrn Book Depository: http://bit.ly/3aOVDlT Learn more about your ad choices. Visit megaphone.fm/adchoices

Skeptic Haven is a show that I appear on from time to time which features live callers on topics pertaining to religion and science, and the calls range from highly contentious to thought-provoking and constructive. Here is one of them.Check out Skeptic Haven: www.youtube.com/ ⁨@SkepticHaven⁩ Watch my other debunks/debates/discussions: http://bit.ly/ProfDaveDebunkEMAIL► [email protected]► http://patreon.com/ProfessorDaveExplainsCheck out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!Amazon: https://amzn.to/2HtNpVHBookshop: https://bit.ly/39cKADMBarnes and Noble: https://bit.ly/3pUjmrn Learn more about your ad choices. Visit megaphone.fm/adchoices

Grignards are all over the place! Better make sure we can draw the correct products of Grignard reactions. Try these for practice.Try all of the organic chemistry practice problems: http://bit.ly/ProfDaveOCPPOrganic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChemEMAIL► [email protected]► http://patreon.com/ProfessorDaveExplainsCheck out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!Amazon: https://amzn.to/2HtNpVHBookshop: https://bit.ly/39cKADMBarnes and Noble: https://bit.ly/3pUjmrn Book Depository: http://bit.ly/3aOVDlT Learn more about your ad choices. Visit megaphone.fm/adchoices