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Demo - The Little Engine that Could (explode) - I fill the tank half full, seal it up, and I get a couple of cotton balls and roll them out so they fit on the fuel tray. I soak them it 99% isopropyl alcohol, and light them. The whistle will tell you when you are up to pressure. I also like to put other fuel in after the alcohol burns down. When the kids had paper planners, I would borrow one, and rip out the useless pages in the front and burn those. This lives in the back equipment cabinets with the other heat and pressure demos.
Lab- Newton's Law of Cooling. The website lays it out pretty well, it also has pictures of the setup. A beaker of boiling water comes to equilibrium with ice water. This is overly complicated. I would just use a thermometer in a piece of metal maybe?
Here's the website: https://sites.google.com/a/ttsd.k12.or.us/tuhsphysics/home/htp-ib-physics/thermodynamics/newton-s-law-of-cooling
Demo - Pendulum
Demo - Pendulum
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