It's About Time C

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bearasauras
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Re: It's about time

Post by bearasauras » March 3rd, 2009, 6:37 pm

You should check with your tournament director to see if there will desk table where the event takes place

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Re: It's about time

Post by Hola » March 6th, 2009, 4:48 am

HELP!!!
:? With a pendulum, how do you measure fractions of a swing?
i.e. if a quarter of a swing has gone by, where will the the bob be? What about a fifth of the swing? three fifths? How do I figure this out? What math is involved? I'm really having trouble with this right now....
I'm bad with last minute things, and my regional competition is tomorrow. :shock: I'm leaving for it... today, so the sooner anyone could hint me towards anything, even if it's just a guess or a not-so-helpful thought, please say it! :mrgreen: Thank you thank you to anyone who takes the time to respond....
Smile :D

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Re: It's about time

Post by Hola » March 6th, 2009, 5:29 am

Also... Does anyone happen to know where I can find a good list of time (not clock) words and definitions, like "jubilee" and "sesquicentennial" and "olympiad?"
Smile :D

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Re: It's about time

Post by vofbassist » March 6th, 2009, 11:37 am

I've been wondering, what's the advantage of a pendulum clock as opposed to other ones? It's easier to build, but is it also more precise or something? I know that many teams that have pendulum clocks have done very well with them, but I can't help but think that there's some kind of trick to it.

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Re: It's about time

Post by Melkor6000 » March 6th, 2009, 4:14 pm

Hola wrote:
With a pendulum, how do you measure fractions of a swing?
i.e. if a quarter of a swing has gone by, where will the the bob be? What about a fifth of the swing? three fifths? How do I figure this out? What math is involved? I'm really having trouble with this right now....
I'm bad with last minute things, and my regional competition is tomorrow. :shock: I'm leaving for it... today, so the sooner anyone could hint me towards anything, even if it's just a guess or a not-so-helpful thought, please say it! :mrgreen: Thank you thank you to anyone who takes the time to respond....
a pendulum is shm (simple harmonic motion) which is a sinusoidal curve, so you would calculate the displacement with respect to equilibrium, and use the equation T = 2(pi)sqrt(l/g) to get a graph of the displacement, and pair it with a specific time. You can't just use a liear relationship up and down, because it will be slightly off because shm is a curve. Hope this helped.

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Re: It's about time

Post by Butternuts » March 8th, 2009, 12:48 pm

Okay, so I live in Cheyenne, Wyoming and I just got assigned to this event for state (in like 2 weeks!!! and I've ever participated in science olympiad). I was thinking about using a pendulum with a simple escapement. It seems like the most accurate idea. Also, a stiff rod instead of, say, string for the pendulum would be better, so that it doesn't move around. How would I attach the rod? I told you I live in Wyoming because the recomended book, --Jespersen, Fitz-Randolph, Robb. "From Sundials to Atomic Clocks: Understanding Time and Frequency" 1999-- is not avalible at any library in Wyo. So is there a website or alternate book that we can study from?

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Re: It's about time

Post by Flavorflav » March 8th, 2009, 5:56 pm

If you only have two weeks, forget the escapement. With a heavy bob you won't need it.

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Re: It's About Time C

Post by Mickey » March 12th, 2009, 2:02 pm

Hey, if you are interested in trading tests, shoot me a message! :D

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Re: It's About Time C

Post by dhbrann » March 12th, 2009, 6:04 pm

Wait should I use to reduce the friction of the pendulum? What were your pendulum's made of? What did you guys do for a pivot point?
If anyone has a practice test they want to give to me, I'll be willing to take it.

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Re: It's About Time C

Post by Jazzy09 » March 15th, 2009, 10:10 am

i got first in state in this event and my team got first as well. will i see anyone else in Augusta?
“He who is humble is confident and wise. He who brags is insecure and lacking.”
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