Let's say you come across a shapeshifter who can manipulate physical reality and particles using some kind of force, perhaps bending light and gravity at a ridiculously quick rate. The shapeshifter is also really good at avoiding cameras and witnesses, so you can never really see the...
First off, question 10 was not answered; perhaps because I added it in late to the post prior to seeing the second poster's reply in this thread.
Secondly, thank you, all, for the replies so far.
Are these weak and strong forces something from quantum mechanics or something before...
Hello, all.
I've been attempting to understand relativity the past week. I've also been reading about quantum mechanics. However, I'm going to try and direct this thread toward relativity.
1) Does relativity only cover space, time, gravity, and light?
2) In the realm of relativity, how is...
So, I am learning about atomic clocks.
I went to this website: http://tycho.usno.navy.mil/simpletime.html
And I started watching the atomic clock on that website tick away. It was ok and cool. At the moment, the website is frozen with "Loading..." for each time zone.
When I started...
I don't see that. However, I think I'll take this thread to another board here at PF.
Where should I go to talk about time travel on PF?
In able to go to the future, why can't time and space simply bend around me while I attempt to maintain a particular position on Earth? The way I see it, if...
So, I've been learning about quantum mechanics as of late.
If I understand correctly, there would be a large amount of energy required to "turn back the clock" on all particles throughout Earth (assume that I don't change the position of satellites or the stars) in order to go back in time...
I'm thinking about Cathode Ray Tube (CRTs) television sets. I'm also studying consciousness and attempting to wrap my cognition around Fourier transformations. There are electronics involved. And there is energy and power involved. However, all of it comes together to develop a visual, right...
Well, one of the things that concerns me is whether or not the past research has been biased and writing off consciousness and cognition of temporal events as some kind of artifact. These days, I don't really see the same physical phenomena that I saw as a child. Furthermore, the idea of...
Currently I'm researching consciousness in relation to the physical universe. This thread is to ask if any physicists here know about this phenomena and can possibly describe why it happens and how it works. I'm not sure it is a phenomenon, but I do recall it happening to me more than once as a...
Homework Statement
The altitude of the space shuttle during the first 30 s of its ascent is described by the expression у = bt2, where the constant b has the value 2.9 m/s2. Using calculus, obtain an expression for the velocity and acceleration of the space shuttle during this period...
Homework Statement
Problem 3.7 Suppose that motion studies of a runner show that the maximum speed he
can maintain for a period of about 10 s is 12 m/s. If in a 100-m dash this runner
accelerates with constant acceleration until he reaches this maximum speed and then
maintains this speed...
Sorry about the editing. But there is an image attached if that helps.
Perhaps the reason the orientation of the tension arrow in the way they are has to do with the condition of acceleration. If acceleration is not going to occur, then the arrows would be in opposition, thus there would be no...
Ok, so another thing that is confusing me is how the free-body vector diagrams would look.
In the first example, the Tx is moving to the right. Ty is moving upward.
And since Tx = Ty, then I could label them Tx = T1; Ty=T2
If I were to connect the free-body diagrams, it seems like things look...
So, you're saying that a rope exerts tension?
I'm trying to read more into this.
Would it not be better to say that objects that pull on the rope cause tension, which is the magnitude of force shared throughout the length of the rope?
Or to use your terminology, how about
"tension is the...
The rope would <edit> have negligible mass. Also, see attached image.
The problem says to neglect the rope's mass. I'm assuming that means it has negligible mass.
So, the magnitude of the tension is shared between the objects, not the tension itself? Because to say tension alone would imply...