# Blog OffInMyOwnWorld

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## More Gymnastics Physics

I was at the gym the other day watching one of my teammates do her uneven parallel bar routine, and I thought about something new: in her giant swings, her feet would have to be moving extremely fast in order for her body to make it around the bar. How fast do they travel? A giant is a skill on the uneven bars in which a gymnast swings all the way around the bar in a handstand, ex: Giant swings follow a pattern of uniform circular motion. I timed one of my teammates doing her giants, and on

## Physics of a Full

In gymnastics, a full-twisting layout is a skill in which the gymnast starts in a laid out position (with the body completely flat) and then uses her arms to initiate rotation. When the gymnast first leaves the ground, her body has a great deal of angular momentum, since she will have gained speed by first doing a round-off back handspring. When her feet land back on the floor at the end of her back handspring, they apply a great deal of force to the spring floor beneath her. The reaction force

## Webassign-Induced Forgetfulness

So this weekend I was incredibly proud of myself for completing the webassign... EARLY! Only to realize that I had forgotten my weekly blog post. Darn. Last week I felt relatively good about what we were doing in class, which was a pleasant surprise since I remember being pretty lost in this unit last year. I guess all I needed was a year to get my brain to catch up to class... I feel much better about doing derivatives and integrals, so the last 42 minutes of every day aren't feeling so much

## Black holes and physics tests....

Overall, I was really disappointed for this test: I spent hours learning and committing to memory the process of writing and solving differential equations, only to have so little time on the test that I didn't even get to it! Ah well, better luck next time, self. In the meantime, here's a Phun Physics Phact: Black holes are not actually black. In fact, they emit small amounts of radiation, causing them to glow slightly. This light, referred to by physicists as Hawking Radiation, is actually t

## Springs, etc.

So I was only in class for two days this week, and they were some of the most frustrating 42 minutes of my life. The mystery mass lab got the best of our group on several occasions, but I'm glad to say we finally figured out two ways to find the mass of the cart. I think what made it most frustrating for me was the fact that we did this same lab last year, and I remember it being MUCH easier. Our frustrations were set to ease as soon as we found out that we were allowed to use springs to find

## Busting the Mythbusters

[ATTACH=CONFIG]216[/ATTACH]Our discussions of friction this week reminded me of a Mythbusters episode that I saw a few months ago. In it, Jamie and Adam were trying to bust the myth that cartoon characters could slip and fall on banana peels. They came to the conclusion that this was not possible, and to prove it, they had a person run across a field of banana peels without falling. However, I had some problems with their conclusions. First of all, the mythbusters altered their walk when they

## Making Up Numbers Is Fun...

I was feeling pretty confident about all of the material we've covered so far, until i got to the the relative velocity questions on the webassign. And whoooooooosh, there goes my test grade tomorrow! I've been studying for quite a long time today, but things are not looking good. To get these webassign questions, I resorted to my usual strategy of throwing random numbers around and occasionally multiplying both sides by zero. Sounds like I'm in for a fun 9th period...

## Mapping Galaxy Clusters

[ATTACH=CONFIG]195[/ATTACH]Over the summer, I had the opportunity to meet with Margaret Geller, a scientist within Harvard's Center for Astrophysics (CfA). She showed me some of the new research that she and her husband, Scott Kenyon, were conducting. She is currently in the process of mapping the visible universe in terms of the galaxies that reside within it, and is interested in what appear to be formations of galaxes, millions of light years tall. She showed me visual representations of of t

## Daydreaming in Economics...

So far this week in class has brought down my stress level concerning physics quite a bit, but that's probably because we haven't learned much new stuff yet. Still, I'll take what I can get! The quiz went pretty well for me today and I would do very well in math if our universe was one-dimensional! Anyway, while I've been daydreaming every day during AP Economics, I've noticed that tons of sirens go off during the course of the period; apparently eighth period is a dangerous time around here!

## Hey there AP-C!

To start, I'd just like to say that I'm a nerd through and through (I enjoy doing econ homework), which is the reason that I signed up to take Physics C. I don't plan to major in anything science or math-related when I go off to college, but I do love to challenge myself, so here I come, AP! I'm hoping to learn more about some of the topics that we touched on last year. One of my goals for this year is to learn a little bit more about how the world around me works, since I discovered last year i

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