On that note
Even though Lamis has been helping me by wearing her I love Egypt T shirt, I have to report that I failed to mention the Egyptian pyramids in more than 3 lessons. One of those was about how the Egyptian pyramids could be used as pumped storage power stations by building big water tanks on their tops. On another occasion I managed to spot that the magnets, that are stuck to the no longer used chalk board, (conveniently magnetic) had mysteriously arranged themselves into the shape of a pyramid. In the mean time my HL class are have just started standing waves so I got out my favourite musical instrument, the sonometer, and delighted the students with my rendition of the 3 harmonics of a stretched string. Quite a difficult piece but after 30 years of practice I've pretty much got it. On a more serious note, last week they were doing the hydro power practical measuring the water squirting from a pipe attached to an inverted plastic bottle. Some of them noticed an interesting phenomenon; the last bit of water to come out of the bottle squirted the furthest. I've heard that most of the resistance to water flow in a hydro power station is where the water flows into the pipe, maybe that last bit of water doesn't have top enter the pipe so has less resistance. Worth another look I think.