Orientation Definition and 201 Threads

OK, so imagine you have a wire coiling over itself, in a near concentric spiral. When you get to the outer most edge, such as 10 or 100 wrappings depending on thickness, you then bend the wire so it's one diameter of the wire over and then start spiraling inward, till you get to the smallest...

Greetings, Other fields are curved around particles and objects. The Higgs field permeates all of space. What is the shape of the Higgs field lines? Is it parallel lines? Or a grid of perpendicular lines? Is it curved? What is the orientation? What determined the orientation? Thanks

An interesting thing that caught my attention before is how the space shuttle was oriented when it was in orbit (feels kinda sad to say "was" instead of "is"...). Maybe I'm not remembering right, or maybe the source was wrong, but I recall an astronaut mentioning that the tail end of the shuttle...

Homework Statement On the image, the left stick has a positive charge and the one of the right has a negative one. (Unirformed charge for each) Give the approximate orientation of the electric fields at the points A, B, C, D by using cardinal orientation. http://imgur.com/uWW7JJH [Image...

I didn't see these areas addressed, my apologies if I missed them. If there was no delay in the detection of the signals at the two sites, would that mean that the location of the event was 'directly overhead' or 'directly below'? Was the delay, compared to the speed of light and distance...

Hello, I am using accelerometer to detect orientation change.for an e.g.if mobile accelerometer senses the direction that is it in portrait or landscape mode.so basically in this method the change of axis is detected . I am using the BMA250e module as an acceleromter,which has an inbuilt...

The point mass (aka particle) is a fictional but useful concept. However, I have yet been able to find a definition of what exactly a point mass is. It is commonly accepted that a point mass does not have an orientation, and thus only 3 coordinates to determine its position are required (as...

I am doing an analysis concerning the torque-free motion of an axisymmetric body (J1 = J2 != J3). The angular velocity is given \omega(t) = [\omega_t\ sin(\Omega t), \omega_t\ cos(\Omega t), \omega_{z0}] where \omega_t, \Omega and \omega_{z0} are constants. I would like to determine the...

bapowell submitted a new PF Insights post A Poor Man's CMB Primer. Part 1: Orientation Continue reading the Original PF Insights Post.

Hello everyone, It's been a long time since I last posted in the forum, but I no longer have internet at home nor a lot of time either. I'm majoring in physics, I've done pretty well so far, but it's been harder for me than it should be. This is the consequence of two things: First, I...

I need help on where i can find the numerical study and a MATLAB code on how to visualize the distribution function and orientation tensor of fibers in simple shear flow for different closures as it is shown in Fig.1 and Fig.2 of the following paper...

So if we have a non-simply-connected region, like this one to apply Green's Theorem we must orient the C curves so that the region D is always on the left of the curve as the curve is traversed. Why is this? I have seen some proofs of Green's Theorem for simply connected regions, and I...

In the process for orienting molecular chains, for example dyneema, does the volume of the polymer change? In the process for creating dyneema, the fibers are drawn, heated and elongated. Would this change the volume of fiber? I know the density for dyneema is listed at .97. The density of...

Edit: since creating this post i found a video showing all of the rotations and phases of the moon for a year So for my purposes that should be sufficient. Thanks. ------------------------------original message----------------------------------------------- Hi, Can somebody explain why...

Anyone know what the specification of EU1L is in a garden tractor battery? I am assuming "U" is utility, and "L" is the positive terminal post faces left viewing the battery's face or front. If so, what is the "E" and "1"?

Why are the orientations of waves arriving at the screen not considered when adding amplitudes? For example a double slit in 2D has two radial lengths of R1 and R2, one from each source Slit 1 and Slit 2, arriving at point P1. (See attached) The provides a probability amplitude of...

The configuration and dimensions of any experiment are important in determining wave amplitudes. Then why are the orientations of complex waves not considered when they are added? For example in two dimensions; To find a resulting wave at a point P1 from two paths R1 & R2 we have...

Are there any generally accepted techniques for maximizing cell phone reception with regards to phone orientation? When I search for this question on Google I get "answers" that seem more opinion than anything. Any engineers in the house with definitive experience with this topic and confident...

Hi everybody, i have a problem that i wanted to share with you if we consider a polycrystal made of cylindrical fibers following a von mises-fisher distribution equation (17) in http://bit.do/vmisesfisher (called orientation distribution function of fibers) . i must change the probability...

Hello everybody :) This is my first post! I have a mystery about radio communication that I was wondering about for a long time: If I have understood correctly, most computers have a single WiFi antenna in the shape of a rod, which is placed in a particular orientation. My question is this...

Can the genes or their epigenetic switches be modified in such a way that a person's sexual orientation changes, and the change becomes inheritable? Hypothetically, if a genetically exclusively heterosexual male performs sexual activity with another male in the absence of a female partner to...

I would like to use an ultrasonic transmitter and three receivers to be able to determine the position of the transmitter relative to the receivers. The distances to be measured are around 3-4 ft. I want to understand how the receivers orientation relative to the transmitter can affect the...

The AM/FM radio on my boat has a simple wire about 70 cm long as an antenna. It is much less effective than a car antenna. I say that because it has difficulty picking up stations that the car gets easily. At sunrise/sunset the effects of radio propagation become evident as the stations...

Hi guys, I was playing around with conductor configurations and observed this phenomenon. Mind you these are for the High voltage transmission (138 kV) lines that span kms. So apparently, the orientation of the conductor relative to North will change the ampacity of the transmission line. Can...

Homework Statement At time t=0, a block is released from point O on the slope shown in the figure. The block accelerates down the slope, overcoming sliding friction. a.) Choose axes 0xy as shown, and solve the equation ##\Sigma F = m a## into its x and y components. Hence find the block's...

Are there any experiments or theories about the relation between magnetic dipole moment orientation and velocity vector of free electrons?

Most ( or probably all?) galaxies are shaped like flat discs (10/30 times wider than thick). Are their planes all aligned on the same angle (from our point of view) or they vary? If so, is it just casual orientation or it follows a certain pattern, for example the angle grows proportionally...

Something I have been wondering for a time. How does PF do in terms of diverse sexual orientation. Don't worry, the poll attached is secret. But if you want to share something about yourself, feel free to use this thread! This thread might be a help towards other people who are having...

http://i.imgur.com/ZH9huJt.png Lets suppose this perfectly rigid cylinder has a uniform mass and has a length on the order of the distance between the Earth and Mars or some similar situation. This cylinder is orbiting around the Sun in a 2-body universe. What would this cylinder look like on...

In 2 dimensions we have clockwise and counter clockwise orientation, in 3 dimensions how to determine orientation in the space. for example: how to name the vertices of a solid like a cube or a tetrahedron.

Hi, So I was accepted into my #1 school for chemical engineering. I wanted any advice on any questions I should have or prepared to ask the personal running the program that might not be obvious to incoming student. I'm a transfer student with a fairly high gpa, and all of my credits have...

Homework Statement F= <y,z,x> S is the hemisphere x^2 + y^2 + z^2 = 1, y ≥ 0, oriented in the direction of the positive y-axis. Verify Stokes' theorem. Homework Equations The Attempt at a Solution So I completed the surface integral part. I'm trying to do the line integral part of Stokes'...

Homework Statement ∫Fdr Over C where C is the cirlce (x-3)^2+ (y+4)^2=4 F=<y-cosy, xsiny> Homework Equations The Attempt at a Solution So I applied Green's theorem and converted to polar and ended up with -4π, it should be positive. The orientation confused me since day one...

In the wiki, there is an explanation for what is the tangential angle in cartesian and polar coordinates. However, the orientation these angles aren't specified. In cartesian coordinates, I believe that the tangential angle φ is measured from the x-axis, in polar coordinates the tangential angle...

Homework Statement The ammonia molecule (NH3) has a dipole moment of 5.0×10−30C⋅m. Ammonia molecules in the gas phase are placed in a uniform electric field E⃗ with magnitude 1.0×106N/C. What is the change in electric potential energy when the dipole moment of a molecule changes its...

Suppose that H2O molecule (micro = 1.85 D) approaches an anion (such as Cl-) in the gas phase (situation typical of the ion-induced nucleation of atmospheric water vapor). (a) What is the favorable orientation of a molecule? (b) Calculate the electric field (in V/m) experienced by the...

Here is my task and my attempt of solution: How to use fact that C is positively orientated viewed from point (10,0,0)? I'm not sure I understand it.

This is not really a problem, more just a fact-based question. I have been using the Google, but I have been unable to find an answer. Is there a way to induce the answer that I am missing? :confused: Question: What range of distance does a double convex lens have to be from an object to...

Hi, All: Say S is a submanifold of an ambient, oriented manifold M; M is embedded in some R^k; let ## w_m ## be an orientation form for M. I'm trying to see under what conditions I can orient S , by contracting ## w_m ## , i.e., by using the interior product with the "right" vector...

If instead of evaluating the above line integral in counter-clockwise direction, I evaluate it via the clockwise direction, would that change the answer? What if I evaluate ##C_1## and ##C_3## in the counter-clockwise direction, but I evaluate ##C_2## in the clockwise direction?

Hi, I'm learning vectors and there's two notions which I don't distinguish : Is the orientation of a vector (determined by the angle it has) the same thing as the direction of a vector ? thank you

Hello. I just wanted your input on orientation week (frosh week). For those that attended, was it worth it? And for those that didn't, what reason motivated you not to? And yes I know its a rather silly forum question.

A force of 16,000lb compresses a string from its natural length of 13 inch to 8 inch. Find the work done to compress it to the first inch W=$$\int F dx$$ F=kx 16000=K(5) 3200=KW=$$\int F dx$$ W=$$\int_1^{13}\!\ 3200xdx$$ [1600x^2] from 1 to 13 w= 268800ftlb Am I right? I think the trick...

Hello. I'm sorry if this is a really trivial question, but I'm not that good with vector arithmetics, so I have to ask. Let's say I have two objects on a 2D plane, that face some direction. I have (x,y) coordinates of each object, and I have an angle each object is facing. The relative...

Say I have a particle in the rest frame with spin up in the z direction. If I boost the system in x direction, does the spin still point in the z direction? Why or why not? In Dirac Spinor, if I choose "spin up", namely setting \phi=\begin{bmatrix}1\\0\end{bmatrix} in the notation shown in...

Let an electron is orbiting in a orbit with the principal quantum number n =1. According to wave mechanics its angular momentum is √ l(l+1) h/2∏ and angle : cosθ = ml/ √ l(l+1) How one can explain the electron angular momentum and its possible orientations for l =0? Off course for n =2, l...

I am trying to compute -dx i CROSS -x i -y j i,j,k are the unit vectors x is from -∞ to ∞ and y can only be negative. Right hand rule tells me that the cross should be in the negative k direction but computing the cross product gives me y dx k. What's wrong?

Hi there all, I have a personal project I'm working on and since I haven't done any linear algebra in many years I'm not sure what I think is right, is right. I'm also not entirely sure this is the right place to ask but I'm asking more for confirmation/clarification of methodology than...

So I need to find the structural orientation of CO32- The answer is that its trigonal planar, forming a double bond with one of the oxygen atoms. However, why is this so? Why does one of the oxygen atoms form a double bond instead of a single bond as the other atoms do? See...

Determine the magnitude of the resultant force FR. Assume that F1 = 230 and F2 = 395 Express your answer to three significant figures and include the appropriate units. Determine the direction of the resultant force FR , measured counterclockwise from the positive x axis. I got the...