Recent content by KingNothing
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Trauma causing temporary unconsciousness: what happens physically?
I am a fan of combat sports such as boxing and martial arts. In competition a person might get hit and temporary lose consciousness, often for a fraction of a second before they regain their senses. I would like to know what is happening on a physiological level when this occurs. What is...- KingNothing
- Thread
- Replies: 1
- Forum: Biology and Medical
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A few questions about solid-state relays
Okay, good. I am essentially hoping to use a variable PWM and a low-pass filter as a variable DC voltage. Although, the board is also capable of digital output at +5V, +0V. Would it be sufficient to drive the relay using just a 178-ohm current-limiting resistor? In the picture, I did not...- KingNothing
- Post #5
- Forum: Electrical Engineering
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A few questions about solid-state relays
Thanks for the help; however, I don't think I completely understand. Specifically: I'm not sure what you mean by 'supply voltage'. Do you mean the control voltage? The SSR only has four pins, two for the control and two for the load connection. If you do mean the control voltage, I do plan...- KingNothing
- Post #3
- Forum: Electrical Engineering
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A few questions about solid-state relays
Today I bought a solid state relay, the datasheet for which can be found here. My goal is to use it to switch 120VAC, controlled by an Arduino Uno board (with Atmega 328 microcontroller). I am very rusty since my days in EE classes, and have not worked with solid state relays at all. In the...- KingNothing
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- Replies: 6
- Forum: Electrical Engineering
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Is a Bachelor's Degree Really Worth $66K at Age 25?
Whoops, sorry, I accidentally used the figure from the Master's degree row.- KingNothing
- Post #4
- Forum: STEM Academic Advising
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Is a Bachelor's Degree Really Worth $66K at Age 25?
"Education pays" on BLS website. The Bureau of Labor Statistics has this page on their website: http://www.bls.gov/emp/ep_chart_001.htm. http://www.bls.gov/emp/ep_chart_001.JPG Source: Bureau of Labor Statistics, Current Population Survey, 2010. This just seems very odd to me. This says...- KingNothing
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- Education
- Replies: 6
- Forum: STEM Academic Advising
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Undergrad Can Objects Travel at the Speed of Light?
Thank you kindly Mr. tiny-tim!- KingNothing
- Post #3
- Forum: Optics
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Undergrad Can Objects Travel at the Speed of Light?
I am not an expert on Physics and have for the past year been engulfed in work, so I am very rusty. I read a comment online recently that essentially said the laws of physics simply prevent any object from accelerating to the speed of light (infinite energy required?), but do not say that an...- KingNothing
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- Light Speed Speed of light
- Replies: 3
- Forum: Optics
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News Alternatives to First-Past-The-Post Voting
I think this would discourage less intelligent or less informed voters. Maybe that's a good thing.- KingNothing
- Post #11
- Forum: General Discussion
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High School F=ma, but Gravity is a Force with no mass?
The force will vary according to mass. So a 10-pound bowling ball will have twice the gravitational force ("F" in your equation) as a 5-pound bowling ball. But they will both have the same acceleration ("a" in your equation). Gravity follows the same laws everywhere, but the actual...- KingNothing
- Post #5
- Forum: Mechanics
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News Is Gasland a Reliable Source on Fracking Issues?
What frustrates me is that it's so hard to form a real opinion without being an expert on the subject yourself. I can't trust the filmmakers or their targets, because they all have an agenda and $$ to make. For what it's worth, I drink Colorado groundwater pretty much daily.- KingNothing
- Post #55
- Forum: General Discussion
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Is Nose Blowing in Public a Generational Difference?
As people age, they are allowed to do more and more "inappropriate things". Once you hit about ~75 you can just fart/burp/blow your nose anywhere you want.- KingNothing
- Post #63
- Forum: General Discussion
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Undergrad Interesting Practical Mathematical Problem
Think about it this way: whenever you move the drill in one direction, you are sacrificing room on that side. At 2/3 you are sacrificing the most room while the other side can compensate. If you go further than 2/3 you create a 'dead zone'.- KingNothing
- Post #9
- Forum: General Math
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Undergrad What is the g-force of a car stopping on a dime?
Would it not be appropriate to solve a system of equations, d=1/2 * a * t^2, d = 17.91 mm, and a * t = 55 mph? Doing this I get about 16.9 kilometers / s^2, or 1721g.- KingNothing
- Post #4
- Forum: Other Physics Topics
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High School Is Hard Work More Important Than Natural Talent in Achieving Success?
Welcome to the world. Even the smartest people eventually realize there are people who are better. You don't have to be the best physicist, just be the best at being you.- KingNothing
- Post #17
- Forum: General Math