20Hz to 20kHz (Human Audio Spectrum)
In briefA two-minute sine tone sweeping exponentially from 20 Hz to 20 kHz, covering the human hearing range at constant acoustic pressure.
Physics & Space
Page 24 of 25
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Murray Gell-Mann talks about Richard Feynman
In briefIn a short interview clip, physicist Murray Gell-Mann talks about working alongside Richard Feynman at Caltech. He describes how the two men clashed in personality and image despite similar brilliance.
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Elon Musk | Full interview | Code Conference 2016
In briefKara Swisher and Walt Mossberg interview Elon Musk at Code Conference 2016 about one-way Mars missions, electric vehicles, autonomous cars, SpaceX booster reuse and AI.
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100 car batteries wired in parallel!
In briefStyropyro wires 100 car batteries in parallel to produce more current than a lightning bolt and tests what happens when it is shorted. The experiments, done with other YouTubers, show spectacular effects of extreme current.
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SpaceX Pad Abort Test
In briefA short SpaceX video of the Dragon 2 pad abort test, in which the capsule's thrusters fire to carry it away from the launch pad. It also shows the pad deluge system.
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Vertical Landing Rockets Before SpaceX
In briefCurious Droid surveys vertical take-off and landing rockets that predate SpaceX and Blue Origin, including the McDonnell Douglas DC-X of the 1990s. It shows that propulsive landing has about 60 years of history.
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FREE water from AIR device: BUSTED
In briefThunderf00t critiques the MIT and Berkeley metal-organic framework device that claims to pull water from air using only solar heating. He argues the energy accounting does not work and that such devices are essentially fancy dehumidifiers.
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5 REAL Possibilities for Interstellar Travel
In briefPBS Space Time surveys five realistic options for interstellar travel, from conventional rocket fuel to antimatter and nuclear pulse propulsion. The options rely only on known physics.
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Space Suit Testing
In briefShort footage from a NASA space suit test in which a technician is exposed to near-vacuum after an accidental depressurization. It shows the instantaneous effects on a human body.
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Stars orbiting the black hole at the heart of the Milky Way
In briefA time-lapse from ESO's Very Large Telescope showing stars orbiting the supermassive black hole at the Milky Way's center over nearly 20 years.
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A laser pointer at 2 billion fps makes the speed of light look... kinda weird
In briefAlphaPhoenix shows off a new camera that films at two billion frames per second and uses it to film a laser pointer pulse. He investigates a strange quirk in how the speed of light appears on camera.
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DC-X Flight 8
In briefFootage of DC-X Flight 8 from July 1995 at White Sands, in which the Delta Clipper Experimental reusable rocket turned over into a re-entry profile and re-oriented itself for landing.
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The Glass Age, Part 1: Flexible, Bendable Glass
In briefA Corning-sponsored video in which Adam Savage and Jamie Hyneman introduce flexible, bendable glass. It covers the history of glass innovation with demonstrations of bendable optical fiber and ultra-thin glass.
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Synchronization of Metronomes
In briefA Harvard lecture demonstration in which five metronomes on a movable board gradually fall into synchronization through coupling. Removing the coupling lets them drift out of step.
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Richard Feynman: Magnets and Why Questions
In briefA clip from a BBC interview in which Richard Feynman is asked why magnets repel and attract. He explains that "why" questions depend on what a person already accepts as fundamental.
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Project Orion Nuclear Propulsion - 1950s Tests | Unclassified Video
In briefDeclassified footage of 1950s tests of Project Orion, the nuclear pulse propulsion concept, including the Hot Rod prototypes flown on conventional high explosives. It shows the pusher-plate idea working in small scale.
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Airflow across a wing
In briefA one-minute clip from Cambridge's Prof. Holger Babinsky that debunks the equal transit time explanation of lift. It shows how air actually flows over a wing.
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The NEW Warp Drive Possibilities
In briefPBS Space Time explains how general relativity permits warp drive in principle and covers recent theoretical advances toward solving the negative energy problem.
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Fluorescent Lights under High Voltage Power Lines!
In briefFootage of Richard Box's art installation in which fluorescent tubes light up in the ground under high voltage power lines, showing the electric fields they produce.
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Why Do You Make People Look Stupid?
In briefVeritasium answers criticism that his videos make people look stupid, explaining that teaching must address learners' misconceptions and that holding common beliefs inconsistent with science is not stupidity.
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The Greenhouse Gas Demo
In briefA four-minute demo of the greenhouse effect showing how increased carbon dioxide raises temperature. It uses a simple setup that is dramatic and easy to understand.
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EEVblog 1637: Solar Freakin' Space Mirrors! - Reflect Orbital DEBUNKED
In briefEEVblog's Dave Jones critiques Reflect Orbital's plan to sell sunlight to solar farms after dark using orbital mirrors. He walks through the numbers to show the idea does not work out.
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What If Dark Matter Is Just Black Holes?
In briefPBS Space Time asks whether dark matter could be made of primordial black holes. It walks through the observational constraints that limit this idea.
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SpaceX Reusable Launch System
In briefA SpaceX concept animation of a Falcon 9 and Dragon launch with powered vertical return of both stages and the capsule. It was uploaded to YouTube in 2011.
