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I'm new to science olympiad, and 2dv was sort of confusing to me. Does that limit it all the way to I can't have my circular-linear task pull a string to cause the pulley or the lever or is it just so that I cant have two different chains?

You can't have two different chains at any point. You can certainly have your circular to linear initiate your lever task--you just couldn't have your winch turning at the same time you were having another motor pull your lever, for example.

That's what I thought. Thanks for your help

I'm new to this event (and to the whole of Science Olympiad). I have a question about the tasks. I'm sorry if this has already been asked or if this is a common knowledge question. I just couldn't find it on the site.

Can one actual event in the device count for two tasks?
For example, I plan to fill up a balloon with baking soda and create a vinegar/ baking soda reaction. Could this reaction count for both 3.f (inflate a balloon with a gas) AND 3.i (Initiate an enclosed chemical reaction that creates gas)?

Rose12 wrote:I'm new to this event (and to the whole of Science Olympiad). I have a question about the tasks. I'm sorry if this has already been asked or if this is a common knowledge question. I just couldn't find it on the site.

Can one actual event in the device count for two tasks?
For example, I plan to fill up a balloon with baking soda and create a vinegar/ baking soda reaction. Could this reaction count for both 3.f (inflate a balloon with a gas) AND 3.i (Initiate an enclosed chemical reaction that creates gas)?

I was actually just looking this same question up.
The answer is yes, you may.

Just be careful how you write it up in your TSL:
i. reaction creates gas
f. gas fills balloon

I am doing this in my Rube. We went to 2 invitationals with it and it was fine. So yes, i would say so

What is Double Duty?

XJcwolfyX wrote:What is Double Duty?

When one action is scored as two tasks. It's not allowed, with the exception of the gas from the chemical reaction filling up the balloon.

If I use the lever task to compress the first stage of my hydraulic task, the lever will be moving the same time the hydraulic task is moving. Does it count as a parallel task if the lever and the hydraulic system are moving at the same time, but the lever is causing the hydraulic system to move?