Frame Definition and 1000 Threads

If I moved in the rest frame of a solar neutrino would I still measure neutrino oscillations? Thank you for any help!

Homework Statement Two particles of equal mass M and equal net energy E are approaching each other at an angle of 90 degrees. Find the net energy of one particle in the rest frame of the other. Do not assume that the velocities are small compared to the speed of light. Homework...

In a previous thread someone pointed me to DH's FAQ article on the Rest Frame of a Photon. In the article DH states, "Time and length cease to have meaning in the limit v→c. In that limit, all time and length intervals shrink to zero," and I've been thinking about the implications of that...

Hi, I have a rotated frame (new matrix, T(x,y, z)) and the original frame (old matrix T(X,Y,Z)). I want to use this formula to find the Rotation matrix: T(x,y, z) = R-1 T(X,Y,Z) R Is this equation right? how can I calculate R (rotation matrix) in ZYZ order in this equation? Thank You

Can frame dragging around a black hole induce closed timelike curves (CTC)?

Homework Statement [PLAIN]http://img847.imageshack.us/img847/1704/pinjointed.png Calculate the reactions at A and E and the forces in all members. The attempt at a solution At a loss regarding the reactions, tried equating vertical and horizontal. As for the members I guess its just a...

Are there lorentzian transformation equations relating non-inertial frame to inertial frame. Also are there transformations relating non-inertial frame to another non-inertial frame. By 'non-inertial frame', I mean frame of reference having absolute acceleration,jerk... or any n-th order time...

Hey all, I'm working on an experiment and we have a frame which will be exposed to loads in all directions. I'm trying to analyze how to best secure it and am having trouble considering the 3D analysis, while the 2D analysis seems rather simple to me. I was informed the 2D analysis is...

I don't find any option to remove the frame from a ContourPlot3D graphic in Mathematica. Can anybody help? Thank you.

Im having some trouble wrapping my head around this concept. I don't have the math background i really need to fully understand it which i suppose is causing my confusion. I picture a black hole. some distance outside of the Event horizion, i have a man floating in space. The black hole is...

Homework Statement Determine the forces acting on member ABCD The 100 lb force acts horizontally at point D, the large, bold circle is a wheel, and the smaller, less bold circles indicate pins connecting the members. Member BE is solid. I forgot to label point F in the picture...

It is obvious from particle accelerators that accelerating a mass increases its inertia. That should be a valid observation in all frames. But if the angle between the acceleration vector and the velocity vector is relative to the observer, then whether the mass is accelerating or...

Please help, I am confused with part c and d. 1. Doug in a lab on Earth observes a π-meson is created 2.8 km from the surface of the Earth. It has a rest decay time is 9.0 x 10-6 s and it travels straight down to the Earth at 0.95c. a) What distance would the π-meson measure to the lab...

This occurred to me when I first heard of the Space Time Frame Drag effect, which was confirmed by the results of Gravity Probe B (GP-B). http://science.nasa.gov/science-news/science-at-nasa/2011/04may_epic/" I am not a scientist or a mathematician, so I turn to my fellow humans who are. Do...

My question is: Is the inertial reference frame dependent on mass? In re-reading materials on the topic of special relativity, I have noticed something that passed my attention previously. Within the inertial reference frame, the mass of test particles isn't necessarily dependent on how they...

What is the shortest time duration that one particular frame can exist?(between two interval of universe) or what is the shortest duration between two unique events in the universe? Has it got limit? Is it measurable? If it is , to what extent it is measurable? What's our capabilities (...

Hi, I just register to this site. I'm reading a famous classical mechanics textbook. and it state that 'Since the spatial momentum in the C-O-m frame is zero, there is clearly more energy, p0, in this frame than in the laboratory frame.' I think the energy in the center of momentum(C-O-M)...

The speed of light is not constant in a non-inertial frame; the light accelerates with the acceleration of the observer in reverse direction. Consider the following problem: If a light pulse is created in an inertial frame at some time, t<0 (say t=-10); the light pulse moves at velocity c...

Homework Statement Find the force acting at pin E [PLAIN]http://img841.imageshack.us/img841/4983/piczt.png a = 53.0 mm, b = 212 mm, c = 318 mm, d = 106 mm, and e = 371 mm. A mass of 515kg acts through H. Homework Equations The Attempt at a Solution By finding the moment...

I'm wondering if there are any papers that consider the effect of a rapidly moving mass on a spinning gyroscope. The basic idea is you have some gyroscope, pointing at a distant "guide star", a "whoosh" as a massive relativistic object moves by, and then you look to see if your gyroscope is...

Q 1:Consider a disk of radius R. This disk is rotating around its center with a constarnt angular speed of w. Find the necessary work to move a body of mass m radially with respect to the disk from r=a to r=b. Q 2:The Bernoulli equation for a unit mass can be written as gdz+1/2VdV+vdP=0...

I'm free-falling towards a planet. Inertial or not? I suppose this is a postulate of general relativity isn't it? When I'm studying special relativity I would say Non-inertial, but then if I think about how I cannot really tell if I am accelerating or just traveling a constant...

Are galaxies, quazars inertial reference frame? I think they are at rest or moving at constant velocity relative to the expanding space. But what is the coordinate system to the scale of the whole universe that can describe these inertial reference frames appropriately? Is the coordinate...

Does a charge gain energy in every [inertial] frame when it is accelerated? If you start with one inertial frame, and then you accelerate a charge from that inertial frame to another one, it appears that we produced a changing electric field in making that occur. Isn't the changing electric...

I'm having trouble getting my head around the idea of 'proper time'. I've been thinking of this situation and I can't seem to understand what exactly the proper time is. Say we have a planet 'A' and a rocket B moving towards this planet. From the perspective of A, B is moving towards A. If an...

If a solid object rotates at constant angular velocity, is it possible to chose an inertial reference frame in which the object will not rotate?

I am confused about the twin paradox. Let's imagine Mike and Angela are twins. Mike stays on Earth, and Angela rockets off, away from Earth at close to the speed of light, with the intention of making a round trip back to Earth at the end of her voyage. My question is this: why wouldn't...

Homework Statement This isn't a homework problem but rather a problem I need to solve for a personal project of mine. Basically I need to find the moment of inertia of the following: http://img860.imageshack.us/img860/3952/roboframe.jpg Uploaded with ImageShack.us The rotation is with...

From http://en.wikipedia.org/wiki/Frame-dragging" : "Under the Lense–Thirring effect, the frame of reference in which a clock ticks the fastest is one which is rotating around the object as viewed by a distant observer. This also means that light traveling in the direction of rotation of the...

Homework Statement Usually in physics problem on special relativity, the state that this particular spaceship is traveling at, say, 0.6c. Question is, where does this 0.6c come from? If the speedometer in the cockpit reads 0.6c, does it mean that the observer will look and think that it...

I am trying build a frame in mass production with the aluminum profiles but always have the problem at the mating region of the profiles. As you see in the picture, there is always a line at the mating region of the profiles. Is there anyone who can help me about this problem? Do you know...

A moving charge constitutes current, which in turn produce magnetic field around it. So does that mean if the observer is also moving with charge, then it will not experience ne magnetic field? And if the same observer is carrying a permanent magnet, then it will not show ne motion to align...

I have a digital photo frame that's pooped out on me. In attempting to replace it, I am really disappointed with the digital photo frames I've looked at at Best Buy. Half of them did not work and the other half were so unintuitive that I could not figure out how to operate them without the...

The Earth is an approximately inertial reference frame since it's acceleration with respect to the stars is very small. But if a group of stars is accelerating with respect to another group of stars which group is the inertial frame? Or thinking on an even larger scale, if a universe is...

Homework Statement I'm required to assign co-ordinate frames to an RPR robotic structure, using the Denavit-Hartenberg notation. Homework Equations N/A The Attempt at a Solution I've made the following two attempts at the problem, but i aren't sure which, if any, is correct...

So I was pondering long distance space travel. As I understand it, if you can accelerate a vessel, say over the course of a year, to near light speeds, you can cover very very long distances in a very short period of time(as measured on your on space ship) due to the effects of relativity...

Homework Statement A 0.150 kg frame, when suspended from a coil spring, stretches the spring 0.050 m. A 0.200 kg lump of putty is dropped from rest onto the frame from a height of 30.0 cm The collision between the two is perfectly inelastic. Find the maximum distance the frame moves downward...

Einstein's theory of relativity is based on the fact that all motion is relative, which precludes the existence of a universally defined state of rest (priviledged reference frame). Einstein also recognises the existence of rest mass. If an object were at its rest mass, wouldn't it be perfectly...

hi, I've been toying with the idea of converting my mini cooper to an electric car, and I'm brainstorming ways to reduce the weight as much as possible. I came up with the idea of a carbon fiber frame to replace the heavy steel one, I found a company that can do it for me, but I was wondering...

Okay, so I know what inertial and non-inertial frames of reference are: 1. Inertial is when Newton's laws of motion hold. 2. Noninertial is when they do not hold (the object is accelerating without a force). And I have a few examples as well, such as when you are is in a car and the car is...

I've been learning about 4-velocity and all the "proper" 4-vectors recently, and if I understand correctly, proper velocity η (the 3-vector) is related to ordinary velocity by the relation \vec\eta = \frac{\vec u}{\sqrt{1-\frac{u^2}{c^2}}}, where u is ordinary velocity of an object within a...

Let a clock A be at rest in an inertial frame and let a clock B rotate around it with constant velocity and constant distance from A. Let v be the velocity of B relative to the inertial frame. Both clocks count how long it takes for B to rotate once. According to clock A, the time it takes is...

Does light beam create linear frame fragging around it? If answer is positive, can light become 'tired' going thru the universe and exchanging the momentum with the environment via frame dragging?

Homework Statement A man of weight W is in an elevator. The elevator accelerates vertically up at a rate a and at a certain instant has a speed V. The man then climbs a vertical ladder within the elevator at a speed v relative to the elevator. What is the man's rate of expenditure of energy...

I have been doing some study on the theory of relativity and it has got me thinking. We say that the Earth revolves around the Sun but from what reference frame? From the reference frame of Earch, we are stationery and the Sun simply spins. Why is any reference frame more accurate than another...

The wikipedia article on connection forms refers to a local frame. What is the relationship between local frames and coordinate bases? Are they the same thing? Is one a subset of the other? The connection form article uses general notation e_\alpha for the basis elements instead of the...

I've read that in relativity the concept of the rest frame of a photon doesn't make sense. Why is that? A rest frame of some object is a reference frame in which the object's velocity is zero. One of the key axioms of special relativity is that light moves at c in all reference frames. The rest...

My thinking has been that a photon, in its own F of R, in a vacuum, travels through space, but not through time. This seems to have been "confirmed" in various things I have read. However, I recently came across the assertion that "...in physics, there is no theory that defines the frame...

If the equivalence principle is true then it means that the Earth's gravity field is a constantly accelerating frame of reference. In any accelerating frame of reference the direction of acceleration is always opposite to the direction of attraction. That means that for all observers on the...

Homework Statement The Attempt at a Solution I'm going to post all that I figured out or tried. Most of it is really just pieces of information that I don't know how to put together. The frame is accelerating, so I have to apply a pseudo-force of \frac{3mg}{2} on B and C in the...