Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Friday, December 7, 2007

Physics for children

Stephen Hawking and his daughter have written a children's book: George's Secret Key to the Universe. Let's face it, there was no chance that my children would not be subjected to it. And of the past few weeks, subject them to it, I did.



It didn't disappoint. It purported to have the latest thinking on black holes. Hang on a second, didn't I already read that 20 or so years ago with Hawking's A Brief History of Time? Well, I am pleased to tell you that the latest thinking on black holes is new. For starters, apparently, theoretically you can survive an encounter with one -- so it turns out the Disney movie of 25 years ago was actually more accurate than Hawking's pop science book of a few years later. Of course, I won't be giving much away when I tell you that theory becomes practice here.

Anyhow on to the book -- which is fiction -- and despite having the latest thinking is not hard science fiction. Basically, it is set in the present day an involves a piece of technology, a laptop computer named Cosmos, who can open up portals to anywhere in the universe. This seemed a stretch on the credibility front but what can you do.

The book is about George who is a bright young kid with an interest in science and technology stuck in a family of Luddites/Hippies with practices that would have been extreme for that group in the 60s. One suspects young Stephen had some issues in college back then. There is no technology in George's house, no preservatives in his food (something my kids can identify with) and weekends spent going to environmental protest rallies.

George's only joy is his pet pig that doesn't get much of a role other than allowing George to encounter his next door neighbours, a polar opposite, academic, science family who spend their weekend traveling to comets and the like.

Anyhow this sets the stage for several adventures that allows us to cover the material of physics in a moderately interesting way -- apparently, it is not enough to just have the story, there are inserts, pop outs and pictures explaining the real science. We skipped those on the first read. But the subtext is some debate against Luddites and scientist that George eventually helps reconcile. The debate didn't seem particularly relevant in today's world but the idea of an intellectual debate underpinning a children's book was pretty interesting nonetheless.

This is no major work of literary magic but it has offsetting benefits that make it a great read for children 6 years and above.

Tuesday, July 17, 2007

Tough maths

A new study says that when it comes to daughters and their propensity for maths and science in later life, Dads are to blame. If Dads hold stereotypes, they hold their daughters back.

One a related note, I thought that it may be the 11th or 12th Grade before my daughter came home with a maths problem that stumped me. (The earlier that happened the better the reflect on our education system.) Usually, I look over her homework and try and work it out in my head. It never takes more than a minute and then I can at least check whether she gets it right or not. (By the way, we might talk about it, if she doesn't but I never give her the answer.) And some of those problems are tricky. Last term she had one where she had to take a clock face and draw two lines across it such that the numbers in each of the resulting three areas summed to the same number. Took her about 15 minutes and me about 2 (more than I wanted at the very least).

So this week's problem has me worried. Take the numbers 1 though 9 and keep them in that order. Then using any operator (+, -, x or /) and also parentheses make them into an expression that equals 100. Now I can see how to do that by trial and error but I can also see that is going to take sometime. My daughter is currently slogging through that. But I can't see how to do it simply. I ran out of my 5 minute limit so I thought I'd post it here for your amusement. Please feel free to leave, not the answer, but any short-cuts in the comments.