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| HELP Required on Science Demos! |
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| EEVblog:
I've been roped into giving a 1hr online science demo to a bunch of 10-11yo's about forces, energy and electricity next Thursday :scared: This is an early guideline. Haven't really though about it yet, and don't know what electricity component they want yet. My first thought was a demo of a neodymium magnet down a copper pipe to show how it slows down. This demonstrates gravity, magnetism and electricy all in one. Another though as the 2-G tipover effect in crystals, and a demo of how tipping a crystal oscillator over applies gravitational force to the crystal and changes the frequency. Easy demo I've done before. The other more physics type stuff :-// I had a fleeting thought about using my thermal camera to somehow show a temperature change when I apply a force (like squeezing?) to somthing? Maybe a demo of electrostatic force pushing something? Bending water with electrostatics? Any ideas appreciated! Obviously they have to be realtively simple and effective, and doable by next thursday. Thanks. |
| EEVblog:
Turns out it's a multi part series! Forces, then transformation of energy, then electricity. So the one next week is just forces as per the sylabus. |
| antenna:
--- Quote from: EEVblog on September 29, 2021, 05:07:07 am ----thermal camera to somehow show a temperature change when I apply a force (like squeezing?) to somthing? -electricity, gravity -Maybe a demo of electrostatic force pushing something? --- End quote --- -Rubber bands get hot when stretched and cool when relaxed. -Kelvin Water Dropper? -Electroscope(like a Kearny Fallout Meter)? For a non-contact force, it would be cool to find a radiometer and a laser by next thursday. |
| daqq:
An improvised single stage/multistage coilgun is something the kids might enjoy? Have the 'projectile' hit a light object then a heavy object and measure how far the other object travels? Play around with the voltage/energy in the capacitor? Don't overdo it though, people like their eyes ;) You will demonstrate how by means of magnetism and inductors electrical energy is transformed into kinetic energy and movement and how the same amount of energy will have a different effect on an object depending on its mass. |
| jpanhalt:
Transformers and turns ratios. Buoyancy in air -- large, thin trash/dry cleaning bags filled with hot air and/or whatever you can find. |
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