Topic: heat

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Feynman’s Building Blocks of Thermodynamics

Thermodynamics — 'thermo' meaning heat and 'dynamics' referring to work —is the branch of physics that focuses on the relationship between heat and other kinds of energy. This video from The Royal Institution introduc...

Can Bird Poop Make Clouds?

How does bird poop potentially help to keep our climate just a wee bit cooler? In this episode of Gross Science, Anna Rothschild helps connect tens of millions of seabirds in the Arctic to 40,000 metric tons of ammoni...

The 3-million-year old Ningwu ice cave never thaws

White stalactites hang down from every surface, and the walls and floors are glazed with thick ice. The Ningwu ice cave, also referred to as Wannian Ice Cave in Ningwu County, China, is a unique phenomenon: The subter...

Making a Forge Blower – Primitive Technology

A rotary fan from pieces of bark, a fan cover and spout made from unfired clay, a bow drill to power it, and a mud furnace to concentrate the heat. Watch how Primitive Technology constructs a forge blower from wood, b...

Understanding the Magnetic Sun – NASA Goddard

This dynamic computer model of our sun reveals the behavior of its invisible magnetic structure. The pink and green indicate open magnetic field lines that reach out into space, while the "closed" white lines loop bac...

Plastic Injection Molding

Bill [Hammack] details the key engineering principles underlying plastic injection molding. He describes its history and then reveals the intricate details of the process. He shows viewers where to found, on any injec...

Climate Change 101 with Bill Nye + solutions great and small

What is climate change, what causes it, and how do we mitigate its effects? Bill Nye summarizes Climate Change 101 in concert with National Geographic's Climate Change issue and COP21, the December 2015 Paris Climate ...

Meet the Balloonatics – SciFri goes to Macy’s Parade Studio

How are Macy's Thanksgiving Day Parade balloons designed, calculated, fabricated, tested, and retested before they show up on the streets of Manhattan on Thanksgiving morning? From Science Friday in 2011, visit the 'b...

Much A-Doo About Poo – Gross Science

Poop! Poop for fertilizer, heat, and electricity! Around 300 cows at Jordan Dairy Farm help generate energy and a nutrient-rich digestate, thanks to a specially built barn floor that collects their manure. Nearby, an ...

Peel, Pucker, Pinch, or Puncture? Coffee Lids, Explored

Why are there so many variations on the design of the plastic coffee lid? How many different kinds have you seen or used? Architect and NYU professor Louise Harpman, with her business partner Scott Specht, have amasse...

How the Baccarat crystal studio makes a blown crystal chandelier

Made from melted silica sand, potash, lead (over 24%), and other ingredients, crystal is heavier and more sparkly than glass, making it a perfect material for this light refracting decorative ceiling lamp: The chandel...

From seed to snack – How to Make Popcorn on the Cob

If you have a paper lunch bag, a dried corn on the cob, and a microwave, you can pop your own popcorn from the cob in just a few minutes. A few notes: You don't have to use butter or oil if you want to skip that s...

How do firefighters combat and control wildfires?

It takes vehicles in the air, tools on the ground, highly trained hot shots, smoke jumpers, and helitack crews, and additional reinforcements of all kinds to combat wildfires. When "43,000 wildfires have burned more t...

3D printing with 1900F molten glass – G3DP at MIT

Optically transparent glass printing. A brand new glass 3D printing process called G3DP has been developed through the teamwork of the Mediated Matter group at the MIT Media Lab, MIT's Mechanical Engineering Departmen...

How to Make a Cloud in Your Mouth – Physics Girl

To make a cloud in your mouth -- yes, this is a very cool trick that actually works with practice -- you'll need to make tiny water droplets in your mouth. Then up the pressure. Physics Girl Dianna Cowern demonstrates...

Why Warm Blood is Better Than Cold – Rise of the Mammals

What does a tiny Hadrocodium wui fossil tell us about the evolutionary advantages that mammals were developing before the Cretaceous–Paleogene mass extinction event that finished off the dinosaurs 65 million years ago...

The Amazing Art of Bread Baking in Tajikistan

From National Geographic, this is how traditional, homemade Tajik non is baked in a tanur oven in Kumsangir, Tajikistan. Round and flat, it's a huge part of meals in Tajikistan, where many areas are non-arable, and "w...

Sunlight is way older than you think – TED Ed

The random walk problem -- the "mathematical formalization of a path that consists of a succession of random steps" -- can be applied to sunlight... not the sunlight that travels from the sun to Earth, which takes onl...

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