Videos We All Watch

We watch these videos for two reasons:

  1. to add new words to our vocabulary
  2. to practice explaining things using more sophisticated words and word combinations

How sugar affects the brain

  • gooey (     )
  • velvety (     )
  • watering (     )
  • craving (     )
  • carbohydrates (     )
  • a wide variety of (     )
  • starch (     )
  • raw (     )
  • flavoured (     )
  • how it affects (     )
  • taste receptors (     )
  • taste buds (     )
  • brain stem (     )
  • forks off (     )
  • bitter (     )
  • umami (     )
  • pathways (     )
  • fuzzy (     )
  • overactivating (     )
  • increased tolerance to (     )
  • gut (     )
  • neurotransmitter (     )
  • forebrain (     )
  • dense clusters (     )
  • hotspots (     )
  • overdrive (     )
  • seek (     )
  • inducing (     )
  • let’s say (     )
  • spike (     )
  • leveling out (     )
  • when it comes to (     )
  • to be hooked on (     )
  • kickstarts ... sparks (     )
  • overconsumption (     )
  • wedge (     )

♥

Optical fibre cables, how do they work?

  • Have you ever thought about... (0:00)
  • which are laid under the ground (     )
  • optical fiber cable’s made up of thousands of fiber strands (     )
  • optical fiber cables carry information in the form of light (0:40)
  • to understand the workings of optical fibers (     )
  • the speed of light changes when it passes through a medium, and this change in speed is expressed by the refractive index (     )
  • prism (1:10) pronounced PRIH-zum
  • this phenomenon is known as refraction (     )
  • refraction occurs when light passes... (     )
  • the light bends toward the interface when it goes from a medium of high to one of low refractive indices (     )
  • using some dopants, we’re able to increase the refractive index of the glass in real time (1:42)
  • cylindrical glass (     )
  • if the laser strikes the interface (2:40)
  • no matter what complex shape the fiber forms (     )
  • optical fibers need a protective coating (3:03)
  • the introduction of protective material will replace the position of the air and cease the total internal reflection phenomenon (     )
  • an easy way to overcome this issue (     )
  • cladding (3:22)
  • we'll be able to use a protective layer (     )
  • the difference in the refractive index can be achieved by adding different types of dopants (     )
  • this loss of signal strength is generally called attenuation (3:52)
  • absorption and scattering are the main reasons for signal attenuation (     )
  • this is why you see amplifiers and cables after a certain distance (     )
  • they boost the signal strength (     )
  • the power required for the amplifier is drawn from nearby sources (     )
  • assume you want to send a Hello text message through your mobile (4:28)
  • if the electromagnetic wave is of high frequency, a light pulse is generated (4:55)
  • otherwise no pulse is generated (4:55)
  • a detailed cross section view of an undersea cable is shown here (     )
  • the light which travels through the cable is always confined within the fiber. Thus (6:40)

Hand vs. liquid nitrogen - revisited

  • warning (     )
  • Greetings, fellow nerds (     )
  • Back in July of 2009
  • heater plate / hot plate (0:20)
  • Water now just beads up and rolls off the plate. (0:31)
  • vaporizes (     )
  • cushion of steam (     )
  • remaining (     )
  • heat conduction (     )
  • pipette (1:05)
  • dragging it around (     )
  • skirts away (     )
  • soaking into (     )
  • protect my hand from (     )
  • Dewar flask (     )
  • it'll settle once it cools (2:30)
  • even though (     )
  • it feels like ice, though (     )
  • nonetheless (2:56)
  • thermal transfer (     )
  • slightly too large (     )
  • protects her from being frostbitten (     )

Inferno: Dust explosion at Imperial Sugar

  • devastated the Imperial sugar refinery (0:15)
  • sugar that had spilled from equipment (     )
  • thick concrete floors heaved up (     )
  • brick walls were blown into stairwells (     )
  • fires spread rapidly (     )
  • dozens of others were injured (     )
  • the plant's massive sugar packing buildings were a total loss (0:55)
  • combustible dust hazards (     )
  • there were significant accumulations of sugar dust (1:20)
  • granulated sugar was stored ... and then conveyed into packing buildings (     )
  • bucket elevators, screw conveyors and conveyor belts (2:17)
  • fine particles, which became airborne (     )
  • The machines were connected to a dust collection system, but it was undersized and in disrepair. (     )
  • ducts, beams and light fixtures (3:10)
  • from time to time, clumps of sugar would become stuck in one of the chutes (     )
  • releasing dust into the tunnel (     )
  • the company enclosed the conveyor belt with stainless steel panels (     )
  • dust likely accumulated to an explosive concentration (     )
  • sugar dust contacted a nearby ignition source, likely an overheated bearing (4:30)
  • emergency evacuation drills had not been conducted (     )
  • plant managers were aware of (     )
  • despite the longstanding awareness (     )
  • OSHA began implementing a new National Emphasis Program to increase the enforcement of existing regulations (6:27)
  • decades of operating without a castastrophic explosion may have lulled managers into complacency (     )