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What is Physics?

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What is Physics?

What makes physics so cool? To me, physics is awesome and interesting because it asks the one question no other [physical] science does: “how?” Physics looks at how things happen-the reason things happen-and explains it. No other [physical] science does this. Chemistry deals with the result of things happening while biology deals with why things […]

Maxwell’s Equations: Crash Course Physics #37

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Maxwell’s Equations: Crash Course Physics #37

By the 19th century, we were pretty sure there was something was going on between electricity and magnetism. First, in the early 1800s, Michael Faraday showed us how a changing magnetic field induces an electromotive force, or emf, resulting in an electric current. He also found that electric fields sometimes act like magnetic fields, and […]

2020 PSU Scholarship Reception: Polina Polikakhina

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2020 PSU Scholarship Reception: Polina Polikakhina

Doping of semiconductors

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Doping of semiconductors

At the previous video chapter the hybridization, the electron configuration and the crystallization of silicon has been discussed. To the left of silicon, the element aluminum is placed at the periodic table. The valence electron configuration at the ground state of a neutral atom is 3s2 3p1. Like silicon, the aluminum atom forms hybridized orbitals […]

Does Putting Batteries in the Freezer Make Them Last Longer? | Don’t Be Dumb

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Does Putting Batteries in the Freezer Make Them Last Longer? | Don’t Be Dumb

– Hi and welcome to Don’t Be Dumb. I’m Josh Clark. Thank you for joining me. Have you ever met somebody or heard that some people keep batteries in their freezer? It turns out that keeping your batteries in the freezer is one of histories biggest lies. See, it turns out that putting your batteries […]

P-N junction of a semiconductor diode

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P-N junction of a semiconductor diode

At the previous video chapter we discovered the drifting of holes inside of a p-type semiconductor while connecting the crystal to a DC voltage source. Even in the absence of an electric field, the holes can move through the crystal lattice. The energy level of the covalent bonds between the impurity atom and each of […]

Semiconductors, PN Junctions and Bipolar Junction Transistors | HKUSTx on edX

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Semiconductors, PN Junctions and Bipolar Junction Transistors | HKUSTx on edX

Astrophysics and Cosmology: Crash Course Physics #46

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Astrophysics and Cosmology: Crash Course Physics #46

After a year of studying the laws of the universe together, a year of studying and calculating, learning about motion and fluids, thermodynamics, electricity and magnetism, light and sound, We find ourselves here: Space, the final frontier. We’re all voyagers on a mission to understand the universe, using the power of physics. And even though […]

Energy poverty: let there be light | Steve Huff | TEDxSouthBank

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Energy poverty: let there be light | Steve Huff | TEDxSouthBank

Translator: Leanne Payne Reviewer: Cristina Bufi-Pöcksteiner Meet Fahteme. Fahteme lives in Chad near the border with Sudan. She lives in a UNHCR sponsored refugee camp. This is her with her daughter. It’s about 35 kilometers from the border with Sudan which she left in 2004 due to war. She lives in a camp called Iridimi. […]

Why Do People Say We’ve Reached the End of Physics?

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[♪ INTRO] The whole point of physics has always been to understand what the universe is made of and how the stuff in it interacts. You know, like how Isaac Newton wanted to figure out why an apple always falls straight toward the ground. And we’ve come a really long way over the years. These […]