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by mjcox2000
June 5th, 2019, 8:10 pm
Forum: 2019 Nationals
Topic: Nationals Event Discussion
Replies: 124
Views: 14913

Re: Nationals Event Discussion

Circuit Lab C Thought I would share some thoughts on how the event went from a supervisor perspective. Test Design: The format was heavily influenced by my organic chemistry exams that I took over the past year. The boxes for answers, score totalling page, and "draw this" type of questions were all...
by mjcox2000
May 31st, 2019, 4:47 am
Forum: 2019 Nationals
Topic: 2019 National Tournament: Cornell University
Replies: 476
Views: 68260

Re: 2019 National Tournament: Cornell University

Does anyone know where and when Detector Building is impounded this morning?
by mjcox2000
May 22nd, 2019, 8:12 am
Forum: 2019 Nationals
Topic: 2019 National Tournament: Cornell University
Replies: 476
Views: 68260

Re: 2019 National Tournament: Cornell University

The Awards Ceremony is scheduled from 7:30 pm to 9:30 pm. Who is taking odds on the ability to stick to that schedule? I do not think I have been at a Combined Div B/ Div C National Awards Ceremony that has taken less that 3.5 hours.... Last year, awards’ scheduled start time was 7:30, and awards c...
by mjcox2000
May 17th, 2019, 9:00 am
Forum: 2019 Lab Events
Topic: Sounds of Music C
Replies: 204
Views: 25100

Re: Sounds of Music C

There was a clarification posted a while ago: — THE RULES SAY THAT "ALL NOTES OF THE SCALE MUST LIE BETWEEN F2 AND F5." IS THIS INCLUSIVE OR EXCLUSIVE, I.E. WOULD HAVING F2 OR F5 AS ONE OF THE NOTES BE ALLOWED, AND IF IT IS, WOULD A SLIGHTLY SHARP F5 OR A SLIGHTLY FLAT F2 BE DISQUALIFIED? Yes, that...
by mjcox2000
May 17th, 2019, 7:25 am
Forum: 2019 Lab Events
Topic: Sounds of Music C
Replies: 204
Views: 25100

Re: Sounds of Music C

There was a clarification posted a while ago: — THE RULES SAY THAT "ALL NOTES OF THE SCALE MUST LIE BETWEEN F2 AND F5." IS THIS INCLUSIVE OR EXCLUSIVE, I.E. WOULD HAVING F2 OR F5 AS ONE OF THE NOTES BE ALLOWED, AND IF IT IS, WOULD A SLIGHTLY SHARP F5 OR A SLIGHTLY FLAT F2 BE DISQUALIFIED? Yes, that ...
by mjcox2000
May 9th, 2019, 4:48 pm
Forum: 2019 Question Marathons
Topic: Sounds Of Music C
Replies: 120
Views: 11956

Re: Sounds Of Music C

There is a minor horizontal crack in the bar since the bar primarily vibrates by flexing lengthwise.
That’s right! Your turn.
by mjcox2000
April 28th, 2019, 10:09 am
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 10420

Re: Thermodynamics B/C

A sample of air starts at STP. Then, a sound source emitting a 10kHz sine wave is placed in the sample of air. At a certain point P at a given distance from the sound source, the RMS sound pressure level is 100 dB. Assuming air behaves adiabatically when sound travels through it and there are no fri...
by mjcox2000
April 24th, 2019, 8:48 am
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 10420

Re: Thermodynamics B/C

Suppose you had a cylinder with a piston in it. Describe how you would cause the system to undergo: 1. adiabatic expansion 2. isothermal expansion 3. isobaric expansion Answer|1. Quickly pull on the piston 2. Submerge the cylinder in a constant-temperature water bath and slowly pull on the piston 3...
by mjcox2000
April 23rd, 2019, 4:36 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 11632

Re: Circuit Lab B/C

What direction does the magnetic field point across a wire with current running into the page?
The magnetic field circulates clockwise around the wire.
by mjcox2000
April 22nd, 2019, 12:32 pm
Forum: 2019 Question Marathons
Topic: Thermodynamics B/C
Replies: 127
Views: 10420

Re: Thermodynamics B/C

I'm confused how the reservoirs could reach equilibrium? The Carnot cycle assumes that the reservoirs will never change temperature. The Carnot cycle doesn’t require constant-temperature reservoirs. Hint|The Carnot efficiency equation predicts the instantaneous efficiency. Try integrating. Answers ...

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