Video Definition and 702 Threads

Hi, everyone. I'm currently taking a gap year, and my plan is to study physics, probably for the rest of my life (With that I mean, reading and learning physics for the rest of my life ;-) ) But I thought why not start now? I kind of have fallen in love with the lectures held by Leonard...

Hi, I am looking for a video helping intuition on pressure, in the context of kinetic theory of gases. I remember seeing a video where someone poured a bucketful of little hard balls (lead sinkers for fishing?) onto an electronic scales (a dynamometer, really) showing that this corresponds to...

Hello, What is the fastest connection method (i.e. type of cabling) to transfer images from a video camera to a computer, i.e. what type of connection gives the highest frame per minutes? Is a USB connection fast? If not, why not? Should I look at a camera that connects in a different way...

Hello, I am looking at an IR camera that can be connected to a PC. The camera can store pictures and can only do video streaming but no video recording...What is the difference? Does it mean that we can view what is going on the camera screen also on the computer screen but not record it as a...

And hand eye coordination by playing first person shooters videogames like halo or cod?

I used to have a bunch of these on - ahem VHS,,, This was one that I think shows - all bets are off on trying to predict ground fault current... Even the firemen, keeping their distance (not enough IMO), are almost fooled as the arc stops around 1:42.. nope.

Hi, i came across this video on BBC yesterday: <link to video deleted> Now I wonder how this stuff works in detail? Is it the carrier wave or the multiplexer signal of the phone? best regards

I discovered this interesting series of videos that others might appreciate. Includes interviews with Alan Guth, Roger Penrose and loads of other interesting people. Definitely not pop-sci and fairly up to date. Episode 1 is a bit low quality with unnecessary subtitles, but it gets better as it...

Hi folks, I have just found a video on youtube that shows how a 2 mile linear accelerator was built in 1967, I share it with you, hopefully you will enjoy it as much as I did:

Hi PF! I have a .m4v video file that I want to convert frame-by-frame to .png files. Does anyone recommend software to do this? I'm using a Macintosh. Thanks so much! Josh

While solving an equation, the lecturer was using substitution in this video: x=au was subbed in for Psi at timestamp 39:27 d/dx = (1/a)(d/du). I get that. But then the second derivative is stated as being d2/dx2 = (1/a2)(d2/du2) How is it (1/a2) if we do not know if there is an "a" in the...

[ mod note: moved from general physics so homework template is missing ][/color] At the end of each lesson, the lecturer gives a problem. The question is: A rectangular, flat-bottomed rowboat has a mass of 120 kg when empty. It's 3 meters long, 1 meter wide, and 0.24 meters deep. How many 85 kg...

I'm looking for an online American college for a bachelor's degree, with video lectures, and no group work. What are my options? I have difficulty with reading. This kind of a college would work best for me.

Hello PF, I found this youtube video about the sound of a pulsar, and I have been wondering if this sound is really the radio signals of a pulsar converted into sound, or something fake. Thank you Link:

The thing which I am not getting is the role of scanning in generation of video signal by photoconductive way...the optical image is focused over the photoconductive material ...which decrease the resistance of the material according to the brightness of the scene being casted over the...

Hey, I want to set my own delays to a composite video signal, for use of live video feedback effects (for visuals / art purposes). I am no electrician, but this can't be hard to do right? After searching a few hours online, I haven't come up with any device that I can buy which will do this. Is...

I took differential equation 2 last semester and the book we used wasn't so great at explaining a lot of things. I was wondering if anyone knew of a video lecture series that parallels my book (Differential Equations 4th Ed. by Blanchard, Devaney, and Hall). Specifically I am having trouble with...

Hi, I have some questions about the video about the Banach-Tarski Paradox from the YouTube channel Vsauce: 10:09: Is this really a valid way of constructing the hyperwebster? In this order, one will never get past sequences of only "A". Shouldn't one follow an order like A, ... ,Z, AA, ... ...

Pure math books, in my experience are very hard to read(compared to engineering). An engineering book(in my experience) keeps repeating the same math(high school calculus+some engineering math) again and again. So, after time, the pattern of thinking become more normal. But math books on other...

Hi Everyone, I am very ignorant and uneducated but I have a few questions about a difficult thought experiment. 'How does time flow in a video game/simulation or even in our imagination in relativistic terms?' Let's say a processor operating at 4.2 Ghz, 42 billion instructions per second at...

Hi, just came across a video on CNN showing how to make water behave like it would in space: <link to video deleted> My question about that video is: what height do i need to get a free fall time of 10 sec? best regards

I recorded an amazing cloud chamber track tonight. It came from the direction of the sun, seemed like the angle was off slightly though. I was at 1200ft above sea level and it was 6 pm. I will attach a picture of my setup and a video that is typical and then the video with the awesome track. It...

My professor assigned us to watch the Dirac videos on Youtube: The video is extremely poor quality. Dirac does speak the equations as he is writing them, so I have been able to catch many of them. I am wondering if a team effort at trying to decipher these would be a worthy effort for all...

Hi everyone, I am a programmer. Been doing web development post my Bachelors. Physics was my favourite while growing up and even during my bachelor days. I want to return to it. How can I give up my programming career and make some bucks with Physics. I have been thinking of a couple of ways...

[Mentor's note: The thread title has been edited to change the level from "A" to the more appropriate "B"] Suppose there is planet Z revolving around black hole. Astronaut from Earth go in that Planet Z and start video recording and make a DVD . Suppose they played that DVD in the computer in...

Hi all, I'm going to have my students (algebra-based mechanics at a community college) do a video analysis project and I'm wondering if anyone knows of any resources for good sets of instructions for this type of project. I'd like something pretty open-ended so students can choose their...

Can anyone tell me which video editing software is used in this video. I am doing some project and i need to show the presentation but i really liked what this video has in the background. Can anyone tell me about this software or another similar software for editing. video:

in all three cases there is no battery or voltage source,right?Because I can't see any battery.But there is voltage ,then without battery how is potential difference created?I think potential difference is generated due to charged capacitors not by battery or any other voltage source.

I thought this was pretty cool: www.youtube.com/watch?v=sKOlfR5OcB4 You can skip about the first 2 minutes, which are just the credits and some footage of them transferring some fluid. Nice concrete demonstration of various fun stuff such as superfluidity and second sound.

Hi, I'm currently doing a PhD about how to use carbon nanotubes as an efficient single photon source. On my spare time I've done a short video to explain it to my familly and friends. I thought you might be interested, so here it is :

Which are the most common tools that can be used to create such videos ?

So I was on this site called pluto.tv (which is pretty cool but) I was disappointed that they had no "math channel." I even tried to get them to create one, and they looked into it, but no. So I made one. Sort of. So here's what you do. Go here...

I have a Matlab program that reads data file and then create avi. files and tiff pictures. It runs without problem in window OS using R2014a but cannot run in a Linux high performance computer(HPC). When the Matlab in Linux is started there are two warnings: Warning: No display specified. You...

Recently, Toyota held a 'press drive' day for their 2016 Prius and Jason of Jalopnick had the good sense to make a video of the speedometer during a maximum acceleration. I downloaded the video and coded the timestamps of each speed change to generate this curve: This confirmed the 0-60 is...

Several of my students have pointed me to this video: http://bit.ly/1N1IGR8 Apparently the guy put his cell phone inside his guitar and took a video. My initial reaction was that it looked fake, because the time scale of the movement of his thumb seemed mismatched to the time scale of the motion...

Hi All, Does anyone perhaps now of a book or free video course on alternator design, Like where I can learn about how to design alternators? Sorry if I posted the question in the wrong "apartment" of the site. Thanks Dilan

Hi all, I'm at a bit of a crossroads - I'm in a direct PhD program (in Astrophysics) right now, with the option of walking away with my Master's in September. In all of my research projects I've focused heavily on simulations (I know Python and Fortran, but not anything from the C family...

Fallout 4 launch is just around the corner. Since I probably won't be leaving the house for a month or so after that, I should stock up on supplies. Preferred food should be keyboard and mouse friendly: food that can be eaten with one hand, without utensils. I already have some stock of pizza...

I am trying to test the function movie2avi using simple codes in R2014a as follows: clear; close all; figure; Z = peaks; surf(Z); axis tight manual; ax = gca; ax.NextPlot = 'replaceChildren'; loops = 40; F(loops) = struct('cdata',[],'colormap',[]); for j = 1:loops X =...

from a bit of googling, i realize it's because the frame rate of the camera and the projector are different. however, i have tried recording videos with cameras of 60fps, 30fps and 15fps, and the projector is likely 60 fps. That's why I'm curious about this - which frame rate is faster (the...

Is there a computer algorithm that can determine if a person it moving their right arm or there feet, or if they are running or not ?

Hi Thanks for the help

So, I opted not to post this in Science Fiction and get my thread locked~ I watched this video and it seemed quite ludicrous to me. The man in the video measured sword speed (which I assumed was angular velocity) with mph. He then continued to say that linear momentum applies when swinging...

Does anyone know where I can find video lectures similar to in that they are from the 1950's?

www.youtube.com/watch?v=oW4jM0smS_E That's the video I'm referencing in particular, but 1 and 3 are necessary prereqs if you're new to the matter (as I am). He goes through and derives the product rule and power rule for polynomials using algebra. [FONT=Times New Roman]My question is this...

Hi I am studying Differantial Geometry.My textbook is Lipschultz Differantia Geometry and I am in chapter two.I undersand the basic idea of Vector function but I wanI to gain more information.Is there any video lectures about vector functions.I found this...

Hope this Link works. I thought this guy was great, for the layperson looking for more than the usual fluff. Might nice to give SITP some heavy "likes". Maybe they will do more. Sorry not sure what forum this was most appropriate for...

Can you explain the sort of sinusoidal path here: http://i.imgur.com/vN7PJCu.gif

Hi, yesterday i saw this video on discovery channel. <link to video deleted> in the documentation it was said that this trick with the three hammers and three rulers doesn´t match with actual laws of physics! does anyone can give more information about this?

Hi, using Fortran that writes a large amount of arrays to a text/dat file. Is there some kind of software where I can create a video of these arrays changing from beginning to end? I've tried using VMD, but cannot get dat/text files working on it. Any input will be appreciated.