Sal's series on the Law of Thermodynamics continues with this video on how heat and work are added to, or taken away from, a system. As a result of the heat and work energy, the system that is being worked on will transform into another...

How can something as vast as the universe also be flat? Go beyond the Big Bang Theory using a video from an expansive physics playlist. Topics include the expansion and inflation of the universe, why opposite sides of the universe are...

Think you know a lot about the universe? You may, or may not, be right! Aspiring astrologists examine our ever-expanding universe with a video from the Veritasium playlist. The narrator discusses the observable universe, the time it...

Temperature can be hard on outdoor structures. Learn how engineers consider thermal energy effects while constructing structures such as bridges. The video lesson also considers how heat affects gases by exploring the ideal gas laws....

What's driving the expansion of the universe, and will it ever stop? Take a trip to the dark side in a video full of surprising facts and twists about our view of what lies beyond. Junior cosmologists learn about the invisible energy of...

In the beginning, there was ... well, we don't know, exactly. Was there even a beginning to begin with? Amateur space scientists explore the nature of the origins of the universe in a brief video. Other topics include the misleading Big...

Can you measure the size of something that's getting bigger all the time? It depends upon your perspective! Space scholars discover fundamental facts about our ever-growing universe. The narrator explains the difference between the...

Water is powerful! Because it expands as it freezes, if it does so in a closed system, tremendous pressure can be created. All it takes is a little break to cause the system to explode! It's unlikely that you would submerge a pipe full...

Water is powerful! Because it expands as it freezes, if it does so in a closed system, tremendous pressure can be created. All it takes is a little break to cause the system to explode! It's unlikely that you would submerge a pipe full...

Have you ever seen an egg squeeze through a milk bottle? Show your class this experiment to illustrate expansion and contraction. Where else do we see these at work?

Nearly 400 years have passed since the thermometer was first created! But guess what? The principles are still the same. It works based off of expansion and contraction. Have small groups create thermometers and test them out in...

Gordon Wood, Professor Emeritus at Brown University, and the author of Empire of Liberty: A History of the Early Republic, 1789-1815, examines the post-Revolutionary generation and the tremendous changes that occurred during that period....