Tuesday, April 21, 2009

Transformers






It's a little late for my blog, but I plan on doing it anyways. So, this is a picture of a transformer. A transformer uses magnets to change the voltage and current of a circuit. They also help change the voltage of a power plant to be compatible with the voltage of an ordinary house. The really cool thing about transformers is that the power in a transformer remains constant, but the voltage goes up when the current goes down and vice-versa. Another really cool thing about transformers is that they do not have direct current, like a battery. In fact, they have something called alternating current. In the transformer, there are at least two copper coils. Both have a different amount of coils. The one with more coils will have a higher voltage and a lower current and with less coils there will be a lower voltage and a higher current. This is caused by an electromagnetic induction. :) Isn't it cool?

Sunday, April 5, 2009

Wii Fit


This weekend, my parents surprised me and my siblings by buying Wii Fit. They had talked about getting this video game to inspire exercise for our family, but I did not actually believe that they would go out of their way to buy one. It's quite an amazing piece of technology, actually. Even though Wii Fit is supposed to be for exercise, I prefer to think of it as a bunch of interactive games that require vigorous movement.

In my opinion, the interesting thing about Wii Fit is that it includes a balanceboard. This piece of technology can calculate your center of mass, which they call the center of balance. The Wii Fit video game includes many exercises to help people with their sense of balance. There are many exercises that help people learn to control their center of balance.

The amazing Balance Board can also calculate the mass of an object standing on it as long as the object is less than or equal to 150 kg. Aren't video games exciting?