## Search found 18 matches

April 6th, 2017, 9:37 pm
Forum: General Competition
Topic: Events 2017-2018
Replies: 320
Views: 96547

### Re: Events 2017-2018

Will compound machines or circuit lab come back anytime soon? Not sure what the rotation is like for these physics events. Physics events are generally in a 6 year cycle: 2 years in, 4 years out. The current projected schedule is that circuits will be back in 2 years and compound machines in 3. Wha...
April 5th, 2017, 9:12 pm
Forum: General Competition
Topic: Events 2017-2018
Replies: 320
Views: 96547

### Re: Events 2017-2018

Since everyone is talking against the rotations in the tech cycle, I will speak for them. The tech events in scioly are not meant to teach students how to program or solder or manipulate electronics. The main point of the events is INNOVATION. Sure, students will learn certain skills doing certain ...
March 2nd, 2017, 8:12 pm
Forum: 2017 Study Events
Topic: Remote Sensing C
Replies: 119
Views: 17161

### Re: Remote Sensing C

One unit of spectral radiance is W⋅sr^-1⋅m^-2⋅Hz^-1. Wouldn't this just simplify to J⋅sr^-1⋅m^-2? Hz^-1 is the same as seconds, and W⋅s is a joule. Am I missing something?
March 2nd, 2017, 7:31 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34277

### Re: Wind Power B/C

Btw my binder is not trash, but it is bad compared to Community MS (won 4th in nats last year and same people doing this year). I have barely any chance of beating them, but I still have some hope. We compete in NJ. I want to beat Community really badly, and we had a chance until yesterday when our...
March 2nd, 2017, 12:05 pm
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

Use the form of Planck´s function tλ(λ,L) to find the answer.
March 2nd, 2017, 11:47 am
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

It would be in the infrared (LWIR). I'll ask the next question. What temperature must a blackbody with 5.54* 10^-28 W × sr-1 × m-3 spectral radiance and 550 nm wavelength be at? Alright. I have an idea, but I'm confused on how we would use the wavelength information. Stefan-Boltzmann's law states t...
March 2nd, 2017, 4:11 am
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

Ah, well I never knew the constant's units. Thanks. So to confirm- This would be in the infared range. Do I get next question? If so, I'll just let someone else do it (If that is allowed. I can't think of one rn). It would be in the infrared (LWIR). I'll ask the next question. What temperature must...
March 1st, 2017, 5:05 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34277

### Re: Wind Power B/C

I mean of a rotor also can someone help me with this question? A power plant in Chicago is generating 900 MW on a 700 KV line. Assuming the line is 100 kilometers long, with a resistance along the line of 0.2 ohms, what is the current along the lines When I use I=V/R I get 3500kA but when I use I=P...
March 1st, 2017, 2:07 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34277

### Re: Wind Power B/C

Hey does anyone know how to calculate the solidity of the wind blade?
What do you mean? When I look up solidity, all I find is a programming language.
March 1st, 2017, 11:17 am
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34277

### Re: Wind Power B/C

Although we are division C and can only go to 14cm max, I find that having longer blades generates higher results than shorter blades for sure. Cp=0.5 rho * av^3 Yes, the easiest way to max out your speed would be to do longer blades due to the equation above. However, that equation is mostly usele...
March 1st, 2017, 11:16 am
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

What is the peak wavelength of a blackbody at temperature 310 K? You can use Wein's law so you can do: 0.29/310K = 0.000935483871 nm. That's in the gamma ray range I think. Er, either your units out constant are incorrect I think. No way the wavelength is that low at 310K. If that was in centimeter...
March 1st, 2017, 9:34 am
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

What is the peak wavelength of a blackbody at temperature 310 K?
March 1st, 2017, 7:50 am
Forum: 2017 Study Events
Topic: Remote Sensing C
Replies: 119
Views: 17161

### Re: Remote Sensing C

Has anyone found any useful textbooks for this event? The only free one I've managed to find is http://www.gdmc.nl/oosterom/PoRSHyperlinked.pdf but most of the information in here is irrelevant. In particular, I'm looking for a book that covers more of the ecology behind remote sensing and less of ...
March 1st, 2017, 7:47 am
Forum: 2017 Question Marathons
Topic: Remote Sensing C
Replies: 59
Views: 9867

### Re: Remote Sensing C

If I get it right, here's my question: (This is actually from an invitational) The Hubble Telescope has a diameter of 2.4 meters and orbits at a height above earth of 559 km. If it were used to observe the Earth, instead of space, what would be its theoretical limit of resolution in the visible spe...
February 28th, 2017, 5:42 pm
Forum: 2017 Lab Events
Topic: Wind Power B/C
Replies: 338
Views: 34277

### Re: Wind Power B/C

I got 600mV on high speed with no resistance. However, we are only using 14 cm blades. Whenever we increase the blade length, it becomes slower. We are thinking it is because of the added weight longer blades bring to us, but I am hearing from other teams that the longer the blade the better. Can s...