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by photolithoautotroph
June 11th, 2018, 11:33 am
Forum: 2018 Nationals
Topic: Prediction Contest 2018
Replies: 24
Views: 5211

Re: Prediction Contest 2018

when you accidentally put BASIS Charter fourth for B...
by photolithoautotroph
May 7th, 2018, 2:38 pm
Forum: 2018 Study Events
Topic: Ecology B/C
Replies: 91
Views: 14816

Re: Ecology B/C

Just wondering, will I need to go super in-depth with all the nutrient cycles (oxygen, carbon, sulfur, rock, water, phosphorus, nitrogen)? I do understand it and have notes on it but is it something that is frequently on the test? Nutrient cycles do show up on almost all of the tests I have taken. ...
by photolithoautotroph
May 5th, 2018, 5:33 am
Forum: 2018 Study Events
Topic: Ecology B/C
Replies: 91
Views: 14816

Re: Ecology B/C

I was just put on Ecology because of national tournament scheduling conflicts. I understand the basic concepts of pretty much everything in the rules and I'm trying to learn more. Do you think I will need to learn chemotroughs, and all the sub-classes such as methanogens, halophiles, and more? It i...
by photolithoautotroph
May 3rd, 2018, 4:19 pm
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

If nobody posts a question in this long, you can. Question|Derive a formula for the acceleration of the blocks in a real atwood machine with two masses of mass [math]m1[/math] and [math]m2[/math]and a pulley in the shape of a uniform disk of mass [math]M[/math] and radius [math]r[/math]. The string ...
by photolithoautotroph
May 3rd, 2018, 4:04 pm
Forum: 2018 Lab Events
Topic: Thermodynamics B/C
Replies: 857
Views: 84456

Re: Thermodynamics B/C

I saw this question in a test on the test exchange and couldn’t figure it out. Can one of you help? A monatomic, ideal gas at 0C and 1 atm occupies 57.3L. It expands isothermally to 4 times its volume, is compessed isobarically to its original volume, after which it is returned to its original temp...
by photolithoautotroph
April 29th, 2018, 6:28 pm
Forum: 2018 Question Marathons
Topic: Thermodynamics B/C
Replies: 227
Views: 24471

Re: Thermodynamics B/C

2.50 L of gas originally at 60 ̊C is warmed to 145 ̊C. 1. What is the new volume if the pressure remains constant? 2. Who named this law? 1) 1.99 L 2) Jacques Charles if you mean who the law was named after Shouldnt the gas expand? It should expand. I get 3.14L but there is technically only one sig...
by photolithoautotroph
April 19th, 2018, 12:39 pm
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Consider a pipe with radius r. If an ideal fluid is flowing through the pipe, how would the flow rate change if the radius was increased to 2r? If a non-ideal, viscous fluid is flowing through the pipe, how would the flow rate change if the radius was increased to 2r? Both fluids would go through t...
by photolithoautotroph
April 15th, 2018, 11:11 am
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Correct, your turn.
by photolithoautotroph
April 15th, 2018, 8:49 am
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Sorry for the wait, had to grind to keep my GPA afloat for the past few days.
Question
What is the optimal angle for a projectile to be launched at to maximize range? height? time?
by photolithoautotroph
April 11th, 2018, 12:29 pm
Forum: General Competition
Topic: How do you guys form your cheat sheets?
Replies: 47
Views: 4489

Re: How do you guys form your cheat sheets?

Size three font, arial narrow. The most narrow font in the smallest size that I can read (and that I think my printer can print) to allow for the most information on the cheat sheet. I usually use three columns to make the information readable (not stretching all the way across the page). As for ima...
by photolithoautotroph
April 11th, 2018, 12:23 pm
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Nah, I think rotational motion is fair game. I just haven't gotten to it yet >.> EDIT: For #1, in order for the ball, don't you have to apply a torque to it first though? You can assume that the gravity does all of the work, like it starts on an incline. Gravity and the normal force only apply tran...
by photolithoautotroph
April 10th, 2018, 5:31 pm
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Answer Corrections:|For the first two questions, you must take into account that the object is a rolling disk, rather than a sliding block. The disk has rotational kinetic energy as well as translational kinetic energy. Thus, the gravitational energy is equal to the sum of the rotational and transl...
by photolithoautotroph
April 10th, 2018, 9:35 am
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Answer Corrections:|For the first two questions, you must take into account that the object is a rolling disk, rather than a sliding block. The disk has rotational kinetic energy as well as translational kinetic energy. Thus, the gravitational energy is equal to the sum of the rotational and transl...
by photolithoautotroph
April 9th, 2018, 5:20 pm
Forum: 2018 Question Marathons
Topic: Hovercraft B/C
Replies: 188
Views: 17479

Re: Hovercraft B/C

Questions:|1. A uniform disk is rolled down a hill of height 11m. What is the speed of the disk when it reaches the bottom of the hill? 2. As soon as the disk reaches the bottom of the hill, it hits a horizontal surface of frictional coefficient 0.13. What is the acceleration of the disk? 3. A ball...
by photolithoautotroph
April 9th, 2018, 5:00 pm
Forum: 2018 Question Marathons
Topic: Experimental Design B/C
Replies: 51
Views: 3987

Re: Experimental Design B/C

Questions...|1. What is the difference between deviations from the procedure and experimental errors? 2. What is the significance of the line of best-fit and in what type of graph is it used? 3. What would be an example of the standard of control in a qualitative experiment? Answers:|1. Experimenta...

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