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...

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...