There's No Such Thing As Cold

From the creator

Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate If cold isn't real, then how can I feel it? Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: http://twitter.com/jtotheizzoe Follow on Tumblr: http://www.itsokaytobesmart.com Follow on Instagram: http://instagram.com/jtotheizzoe You've felt cold before. Sometimes it's cold outside. But what if I told you that "cold" isn't real? There's no substance or quantity called "cold" in science. We can't measure the amount of "cold" in something. Instead it's about what's NOT there. In this week's video, learn the difference between heat and temperature, why a wind makes us feel colder, and what it's like to live as a mass of jiggling atoms. This is the physics of cold Cool PBS NOVA episode on the search for absolute zero: https://www.youtube.com/watch?v=y2jSv8PDDwA Richard Feynman on jiggling atoms: http://youtu.be/v3pYRn5j7oI The movement of atoms in a wind: http://www.newton.dep.anl.gov/askasci/chem03/chem03448.htm Why a breeze feels cool: http://physics.stackexchange.com/questions/72163/why-does-a-breeze-of-wind-make-us-feel-cooler Density of the interstellar medium: http://en.wikipedia.org/wiki/Interstellar_medium Have an idea for an episode or an amazing science question you want answered? Leave a comment below! ----------------- It's Okay To Be Smart is written and hosted by Joe Han

Published 2015-01-19 · Watch on YouTube ↗
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