There’s a saying that “it’s not the volts that kills you, it’s the amps” and while that’s true in a way, you can’t have amps without volts and skin resistance plays a big part too. This video explores all this, introducing voltage, current and resistance for those new to these things.
This project started with a Bungee Barbie activity (this one was developed by Stephanie Minor, DSBN and translated into French by me). This activity was great, as it helped students develop skills in making predictions and measuring results of trials and making modifications based on those trials.
A certain viral video may have brought it to your attention that blowing out candles on a birthday cake might be gross, but exactly how gross depends on who’s blowing the candles out.
We have just seen the first image of a black hole, the supermassive black hole in the galaxy M87 with a mass 6.5 billion times that of our sun. But what is that image really showing us? This is an awesome paper on the topic by J.P. Luminet: Image of a spherical black hole with … Continue reading