Hi everyone.
I have a digital circuit which is supposed to talk to a temperature detector. The detector speaks open drain I2C (and it is a slave of course).
My problem is not with I2C but is instead the following. The data line for the detector is, on the other side, the driver input and...
Definitely by the time of Helmholtz, there was an understanding that force times distance caused a change in energy.
What actually happened (as I understand it) was that kinetic energy was the first real breakthrough. In particular, Leibiz defined "vis viva" for an object of mass m and speed v...
I am currently a third year student at uchicago, and I have a question relating to grad schools and gpas.
I feel like a jerk for throwing out my numbers, but it is relevant to my question. My cumulative GPA (including all sorts of non sciencey classes) is a 3.6, my physics only gpa is a 4...
Quick question:
Suppose I hold two initially synchronized clocks on Earth and throw one up and catch it when it comes back down. Now my (small amount of) knowledge of GR tells me that the proper time on the thrown clock should be maximized since it was on a geodesic.
However, this seems like...
I'm still confused. Is this just like if I have say, a stars shaped object that happens to send light out from every point, then if I look at a wall next to it, I will see a blurry star?
Someone I know has asked about a certain property of holograms which he said he was shown while he was in school, but i can't figure out why the property should be true.
He says that he once saw a video of a demonstration where a light (presumably a laser) was shone through a hologram, and...
You need to be a lot more clear. No one knows what math 131 is unless they go to your college. If you gave a course description or something, we could suggest resources for you.
Hello,
Mary Boas is by FAR the most popular undergraduate math methods book. I kind of thing that some physicists go a little crazy for it in fact (maybe crazy for her? I don't know) but whatever the case, it's a good book and it has the virtue of covering MANY topics. Reading it will even...
I had a little bit of trouble understanding this but I'm assuming you want the initial velocity that gives a max height of 100 and crosses the point (190,65).
There are probably several approaches but here is what comes to mind:
1) Write y = ax^2 + bx (no need for an extra + c since y(x=0) =...
Yeah, AUMathTutor, you're basically a savior. I am embarrassed for posting here and I accept your condemnation.
I feel so bad for the original poster. His innocent little question should not have led to the least clear, least productive discussion in Physics Forums' history.
I didn't make a a "personal theory." That's why I put little stars around the word "notation" in my post. I was stressing that thinking of it as a "sort of generalization of a tangent line" was only a heuristic and not a mathematical idea.
Didn't this whole thing start because you wanted to...
Here is how I like to look at this. (df/dx) at a point x is a sort of generalization of a tangent line. That means that it isn't always one (consider f(x) = x^2 if x is rational, 0 otherwise which has f'(0)=0), but can be.
For that reason, since the *notation* df/dx looks like a difference...
For functions from R to R, a derivative is a limit of a fraction. Now I understand that dy/dx seems perfectly reasonably viewed as a fraction because of that, but then we run into trouble.
For instance, if f(x) = 3x for all x, then it is awesome to write df = 3 dx because it makes sense...
I think you have some typos. It's not clear what you mean here. You have, for instance, 0 is less than or equal to y^2/8. That gives no information as y^2 is greater than or equal to zero for all real numbers y.