Hot Goes to Cold
A bouncy thermodynamics song about how heat flows from hot to cold, how engines do work in that gap, and why no engine ever runs at 100% efficiency — the second law in kid-pop form.
Clap clap stomp! Clap clap stomp! Are you ready to learn about heat? Let's GO!
Hot hot hot hot — molecules go FAST! Cold cold cold cold — molecules go slow! When the sun shines down you feel the jiggles inside, Temperature's the dance — it's a wiggly ride!
HOT goes to COLD, that's the waaaay! HOT goes to COLD every single day! Jiggle jiggle jiggle when it's HOT HOT HOT! Slow slow slooooow when it's NOT NOT NOT!
Every engine separates the hot and cold, Using that difference to make work unfold! Heat wants to flow from the hot to the cold, And on the way down, work is what we hold!
HOT goes to COLD, that's the waaaay! HOT goes to COLD every single day! Jiggle jiggle jiggle when it's HOT HOT HOT! Slow slow slooooow when it's NOT NOT NOT!
WORK! WORK! Clap clap! When heat flows through! WORK! WORK! Clap clap! That's what engines do! Really hot and really cold? LOTS of work! Kind of hot and kind of cold? Little work! The bigger the difference in temperature, The more your engine can do for sure!
Efficiency means how much work you get, From all the heat that you put in — don't forget! Can you get it ALL? Can you waste none? NOPE! Some heat always sneaks away — that's how we cope!
HOT goes to COLD, that's the waaaay! HOT goes to COLD every single day! Jiggle jiggle jiggle when it's HOT HOT HOT! Slow slow slooooow when it's NOT NOT NOT!
Hot goes to cold... Jiggles getting slow... That's thermodynamics... Now... you... KNOW! ...molecules! YEAH!