John Richardsim wrote: Watergirl wrote:
Just asking. How did you determine that you had to use 1560m/s as the speed of sound for this equation? I thought the speed of sound was supposed to be 1500 m/s.
They got 1560 m/s in the speed of sound in seawater section
of that Wikipedia article (according to the section above it, the speed of sound in freshwater is almost 1500 m/s). However, the speed of sound in seawater will vary depending mainly on temperature, salinity, and pressure, each of which varies with depth. The figure of 1560 m/s in the text does not address any of those factors, so I would be skeptical about putting it in my notes at all. I personally think most tests would give the specific speed it wants you to use, which would probably be something along the lines of "Assuming an average speed of sound of _____..."
I wasn't really sure what to use, and I dont have an answer key so that also doesn't help me. But I figured I'd use 1560m/s as it was the only speed I found.
So this is my first time doing this event and I was wondering what is the best way to go about studying...
I have a textbook and I am taking notes on all the information, but would that be enough? Is this the first year the event is using those NGSS practices?
You definitely wanna look up each of the different bullets in the rules packet. (I often use Wikipedia for info, although some may argue with its reliability. A university professor's website may sometimes have good info you can find that). Also, diagrams are extremely helpful. You have 4 sheets so you should be able to put a lot of diagrams. Occasionally you may end up having a diagram on the test that is the exact one in your notes, and it makes those questions rather easy. Random facts (e.g. what is the deepest part of the ocean? The Challenger Deep in the Mariana Trench) can also be important. After you do that, I'd say take practice tests. There are 2 under "Test Exchange" and I'd suggest taking both. If you don't know something look it up, and put it in your note sheets.
If you wanna know how to organize your note sheets, that's a different question, but this is on the information you should have.