Act Definition and 188 Threads

I'm aware of the uncertainty princple but I want to know why the quantum world is uncertain. Is it just because we are hitting it with a photon? Is it still an open question? Why is that on smaller scales it is more uncertain?

I'm trying to use a MOSFET as a voltage controlled resistor, and am under the impression that it acts this way when it is in the linear region. However, our VDS will be 2.5V-20V, and our VGS will be 3.6V-5V. That means our VDS will most likely be greater than our VGS - VT, which means it will...

This is fairly amateur but I'm not an engineer so: If you have a drop of water on a table and you stick a straw in it some of the water goes up the straw until gravitational force equals the capillary force. Am I right in saying, (generally): 1) If you have a small drop of water hanging from...

[b]1. A proton has a mass 1.7x10^-27 kg and its speed is v=.969c. When an electric force acts on the proton and does 5.8x10^-9 J of work on the particle, what are the following values? A) Particle energy B) Particle Rest Energy C) Particle Momentum D) Particle Beta [b]2. Particle...

What are the top theories as to why particles show the interference pattern in the double slit experiment.

I've always wondered about this. Bimolecular fluorescence complementation allows the incorporation of fragments of the green fluorescent protein (GFP) at the N and C-terminus of separate monomers. If the monomers dimerize, the process allows the GFP fragments to come together and form a...

Homework Statement Two forces act on a 48 kg object. One force has magnitude 65N directed 59° clockwise from the positive x-axis and the other has a magnitude 35N at 32° clockwise from the positive y-axis. What is the magnitude of this object's acceleration? Homework Equations F = ma...

Considering that the US economy was just about brought to its knees, what the heck happened? Warnings about Fannie Mae and Freddie Mac go back to the late 90's! On Jan 26, 2005, Chuck Hagel introduced a bill 'Federal Housing Enterprise Regulatory Reform Act of 2005' with cosponsors John...

Test your brain's age here: http://flashfabrica.com/f_learning/brain/brain.html" Apparently, mine is 20...much older than most PF'er brains I am sure. I used the Google toolbar to translate the instructions:

Which one is more difficult? ACT or SAT?

Can anyone explain to me what how is the act of observation defined in quantum mechanics? It is commonly said that the double slit experiment shows that if one simply observes the state of the electron as it passes through the slits, it effects the results. Many forms of observations are...

Hi all, I am new to Physics. Rather my profession is different. We are working on a project at domestic level; where i have to handle physics theory. Question: How can i pull object up at some distance from Earth contantly against Earth's gravity? Thanks in advance.

I'm not sure if the Senate is trying to extend the Protect America Act again, but I just caught some of the coverage of the Senate trying to amend the FISA Act. Does anyone know of the details?

F=ma prob with electrons (They don't even act like particles!) Well here's the problem: 1. Electrons in an oscilloscope are accelerated from rest by a constant force of 8.0*10^16 N over a distance of 15mm. Find (a) the acceleration and (b) the final velocity. Relevant equations: 2...

lest we forget

All actions have motivational considerations, but can you describe a truly selfless act that transcends motivation or gain? It's a simple question, but a difficult one to answer I think.

How does a 2from w, act on vector fields X,Y? example w(X,Y) =?

The reason why this thread is here instead of the Earth science files, will be clear in the last sentence In the spring of this year I received a discussion-group E-mail with an early draft of this paper: http://www.pnas.org/cgi/reprint/0606291103v1.pdf Emphasis mine. As a reaction...

CD's have little bumps on them that act like a grating right? but how is it that the little bumps can split white light into the rainbow of colors when I look at it?

Would forces act with the same symmetry in 4D as it does in 3D?

I just got my score today, and I'm happy with it. It's not amazing, but decent. My top choice school is Washington University in St. Louis, but I'm applying to many schools a little less than the caliber. How do you think I'm doing just in this component? Thanks, Jameson

This might be the last quiz I'm posting here!:-p http://www.blogthings.com/whatagequiz/ I act 23, and I'm 23.:cool: (someone was 20 and act 7:biggrin: . ) I'm sure we'd have a bunch of kiddies around here!:-p

Some papers are being released at present, that indicate that the FBI has not been following the 'rules.' Most notably from my perspective, they have been keeping people under surveillance without proper paperwork to do so...

TOTAL POLICE STATE TAKEOVER The Secret Patriot Act II Destroys What Is Left of American Liberty A Brief Analysis of the Domestic Security Enhancement Act 2003, Also Known as Patriot Act II By Alex Jones www.infowars.com (Posted Feb 10, 2003) Congressman Ron Paul (R-Tex) told the...

3d Vectors Very Hard! Three Forces of 30N , 45N and 50N act on an Object. The first act at an angle of 120 to each other the third is perpendiuclar to the plane of the first two. Find the Magnitude of the resultant, and the angle which the resultant makes with the plane containing the first two...

Engineers and engineering students: what did you get on the ACT? from what i understand, the ACT is an approximation of how well you will do in your first semester of college. i know a bunch of people will say, "it doesn't matter what i got...i just worked hard my first year of college."...

Hey Pengwuino - Did you catch the news today about the Patriot Act debate? It's mostly Republicans that want to keep watching what you're checking out at the library.

I'm making a distillation apparatus and I've hit a block. The steel wool I packed into the plastic tubing (acting as a fractionating column) is rusting incredibly fast. I obviously don't want to be drinking rust, so can I just take the wool out and use an extra long tube instead? I'm thinking...

In 2002, President Bush signed into law that requires abortion doctors to attempt to save babies born alive during an abortion. Reading my local news today, this act will be enforced much greater since our government is choosing to take on more morality issues. The beauty of this law (IMO) is...

The following result has been established by Griffiths (pp.50) \nabla \cdot \left(\frac{\hat{r}}{r^2}\right) = 4\pi \delta^3(\vec{r}) Applying this result to Coulomb law, I get that \nabla \cdot \vec{E} = \frac{q}{4 \pi \epsilon_0}4\pi \delta^3(\vec{r}) =...

This may seem like a stupid question to ask, but i kind of have a test tonight. Is there a free site where can i find maybe a list of important quotes in hamlet (act 4 in particular)? i tried sparknotes, but they have very few quotes. Thanx

http://thomas.loc.gov/cgi-bin/query/z?c109:S.520: Sec. 1260. Matters not reviewable SEC. 101. APPELLATE JURISDICTION. (a) Amendment to Title 28- Chapter 81 of title 28, United States Code, is amended by adding at the end the following: `Notwithstanding any other provision...

A ring of mass 0.3kg is threaded on a fixed, rough, horizontal curtain pole. A light inextensible string is attached to the ring. The string and the pole lie in the same vertical plane. The ring is pulled downwards by the string which makes an angle "A" to the horizontal, where tan A=3/4. The...

Hi! I'm currently a junior in high school, and I was wondering if anyone knew any good colleges for a physics major. I live in MS, but the location of a college is not very important to me. I have an okay ACT score of 31, but it was the first time I took it and I'm hoping to improve on it. I...

Unless you're a judge that is... "Responding to the latest court ruling against the act, Mr Ashcroft said, 'We believe the act to be completely consistent with the US constitution.' New York District Judge Victor Marrero said on Wednesday that the act violated the constitution by allowing...

A thought occurred, as they often do, whilst I was singing whilst taking a shower. "Is freewill , in the main an act of improvisation?" I thought as I sung total gibberish to the sound of cascading water. Do we take every moment and improvise in that moment? Is life a continuous state of...

And they said it would never happen! Underneath is a link to the most incredible “anti-terrorism” legislation ever inflicted upon the Western World. The legislation was passed in a midnight stealth-session of the government in Australia (I think what little opposition that existed, were actually...

David Blaine?? Yo, d00dz, any of you familiar with David Blaine's levitation act? Assuming it's not just a cheap camera trick, any ideas as to how he might do it? My friend noticed that it's always shown to people or the camera from one specific angle, if it is an illusion somehow, but...