Orientation Definition and 194 Threads

What are the stable orientation(s) for a dipole in an external electric field? What happens if the dipole is slightly perturbed from these orientations?

Hi everyone, I’m using the Adafruit ICM-20649 IMU attached to a frisbee, and I'm trying to capture the orientation data during the throw. In the attached data, you can see a throw with a 30-degree roll angle. The beginning of the throw is calculated correctly, but the yellow-highlighted area...

Assume a 2D XY grid, and we'll label the obvious directions N, S, E, and W. Assume an object is just going along a straight line from S to N in flat space with no forces acting on it or imparted to it, including rotational. Let's assume some kind of mark on it so we can keep track of...

Hello, kind souls. I am planning to finish my bachelor in the start of next year (early February to be precise). Before I go for my PhD (I will skip the master, something not unusual in my country, especially after a long bachelor like I did), I wish to get some more hands-on research...

Hi everyone here. In 2012 when i was 22 years old , i started an apprenticeship in electronics repair , and worked for my self for almost 5 years . I was repairing switching devices like welders and inverters , easy job by replacing bad components like IGBTs and capacitors. In 2017 i started...

Sorry if this is obvious, but I have studied all the images of galactic orientation online, but I need to be sure. Diagram i made to help illustrate what I mean: I believe it's towards, using this as a reference...

Hi, unfortunately, I have problems with the task c I used the tip with the Laplace evolution theorem and rewrote the determinant to calculate ##W_n##. Then I simply formed the scalar product ##W_1 W_n## and here I get now no further.

I am confused by the question. So, the first thing I am trying to understand is whether the flag direction will be same to a boat observer as to a ground observer. I know that the flag will orient itself in the direction the wind is blowing towards, so the flag should always point in NE...

The gyro has 6 inertial axes and 3 magnetic axes. How do I make them work together to get the orientation of the rocket in the reference fixed to the ground? I found something from Matlab but I am not sure how it works...

Greetings the solution is the following which I understand I do understand why the current orientation of the Path is positive regarding to stocks (the surface should remain to the left) but I don´t understand why the current N vector of the surface is positive regarding stockes theorem...

When we take the x-axis parallel to incline surface its clear that the horizontal component of weight is causing the block to come down but when we take the standard orientation its not so clear to me. Is horizontal component of ##F_N## causing the block to come down? <Moderator's note: Use of...

Case 1 worked out great, I found it to be linearly polarized light at an angle ##\alpha = \frac{\pi}{4}##, but Case 2 is giving me trouble. As best I can tell, ##\alpha## is undefined in case 2. How do I solve case 2?

Greetings All, I have confusion to establish the orientation of a surface so please bear with me σ Those two surfaces are of course intersecting in z=10 on a circle . if I take the surface σ and I want it to be oriented so that it forms an acute angle with the axe Z , the orientation of the...

In other words, is there a rotational orientation of each atom in a monatomic gas (and corresponding rotational speed conserving angular momentum) that affects collisions, or does a substance need to have at least 2 atom particles to have the orientation/rotational ability to have particle...

According to Cauchy's stress theorem, the stress vector ##\mathbf{T}^{(\mathbf{n})}## at any point P in a continuum medium associated with a plane with normal unit vector n can be expressed as a function of the stress vectors on the planes perpendicular to the coordinate axes, i.e., in terms of...

Magnetic fields coupling question. I had to make a small tool holder for my drill press, it hangs on side of press using N52 cylinder magnets. The holder is 4" long x 3/4 x 3/4" AL bar. With a spacing of 3", two 1/2" holes are bored to accept the 1/2 x 1/2 N52's, which will be epoxied in. I...

One of my first exposures to special relativity was looking at a 'light clock' where a photon is emitted and captured by a detector whilst traveling on a train. The passenger sees the photon go straight up. The distance traveled by this photon in a given time, t, is c t An observer however...

I learned that, because ##du \, dv = \frac{\partial(u,v)}{\partial(x,y)} dx \, dy##, if you set ##u=y## and ##v=x## then you get that ##dx \, dy = - dy \, dx##. And that the product of two differentials is a wedge product, which is antisymmetric. If coordinates are orthogonal, then ##dx \, dy =...

I would like to show that fixing the orientation of k-manifold smooth connected ##S## in ##\mathbb {R} ^ n ## is equivalent to fixing a frame for one of its tangent spaces. What I know is that different orientations correspond to orienting atlases containing maps that cannot be consistent with...

I am studying on Zorich, Mathematical Analysis II, 1st ed. pag. 174-175. After having properly explained how orientations (equivalence classes) are defined for smooth k-dimensional surfaces in ##\mathbb {R} ^ n## that can be described with a single map, move on to the more general case by...

Hi, It is my first message :) I hope you are all fine and safe in these difficult days ! I cannot find the good orientation of the vector of friction. A circle moves in translation to the right and in the same time the wall rotates around A0. A0 is fixed to the ground. There is always the...

Hi, I'm looking for help in knowing which orientation is worse for finding leakage: upside down, sideways or no difference. I have a 30ml glass bottle filled with 26ml of oil that is closed with a glass stopper (cork) applied with a set force. The neck of the bottle is filled with oil when...

(Edited with suggestions from Berkeman) After reading the original 1930 paper by Sawyer and Tower (link to original paper here), I noticed that their hysteresis loops are mirrored around the y-axis from many of the ferroelectric hysteresis loops reported today ( see FE examples here, here...

Consider an ##N_2## molecule. Chemists say that the triple bond is due to one ##p_x - p_x## overlap, one ##p_y - p_y## overlap and one ##p_z - p_z## overlap. The x-axis (the label is not important; I’m sure you know what I mean) is clear because it’s the longitudinal axis of the molecule. But...

Hi there, I am making a very basic model of an earth, moon, sun system in ECEF in C# using the Helix Toolkit and in order to begin transformations according to Earth's rotation, tilt, and orbit, I need a reference orientation/position/time of Earth with respect to the sun and moon. So my...

Dr. John R. Hibbing of the University of Nebraska-Lincoln, USA, has published several papers which basically say that there is a correlation between certain physiological reactions of a person and her political ideology (or at least her position in the American political spectrum, with Hibbing's...

How do I determine how much drag is required to orient a spinning spherical projectile with a small parachute just before apogee? The projectile is going straight up. The parachute will not be deployed until around 6.5 seconds into flight when the object is traveling at 14.2 m/s. This isn't a...

I noticed high frequency (greater than 800khz) corona tends to orientate vertically as if it were a flame with a strong air blower beneath it regardless of electrode positioning. This is not the case for DC and low frequency AC corona. Is there a reason why high frequency corona orientates...

Dear all, Hi, I am looking for a non-destructive method of determining the crystal orientation of a smaller-than-50x50x50 μm single crystal, mounted on a quartz substrate. I've considered several x-ray methods like Laue method, or microfocused XRD, but there are some experimental difficulty...

What is an orientation (i.e., set of Euler rotations) or shear transform collectively termed? It seems that these transforms, along with the scale transform are known as "linear" transforms, as described in the Venn diagram on page 2...

The orientation of frequency components in the 2-D Fourier spectrum of an image reflect the orientation of the features they represent in the original image. In techniques such as nonlinear microscopy, they use this idea to determine the preferred (i.e. average) orientation of certain features...

Hi, I am looking at how molecules with hydrophobic and hydrophillic properties move and orientate themselves in water. If I have say a PFOS molecule... The hydrophobic part (the perfluoroalkyl group - the carbon chain) will move to the liquid surface but the hydrophillic part (the sulfonate...

Homework Statement How does this picture represent a unpolarised light?Homework EquationsThe Attempt at a Solution [/B] I thought light waves were perpendicular to the direction of propogation so if it has diagonal components then isn't that not perpendicular to the wave direction If it is...

Hey! :o I want to calculate $$\iint_{\Sigma}\left (ydy\land dz+zdz\land dx+zdx\land dy\right )$$ where $\Sigma$ is the surface that is described by $x^2+y^2+z^2=1$ and $y\geq 0$ and has such an orientation that the perpendicular vectors that implies have a direction away from the point...

If you have a new linear polarizer, how do you find its orientation of polarization? In other words, how do you orient it so it would, let say, polarize light vertically if there is no marking for the 0 degrees angle?

A while ago, I saw an explanation of radio waves. Overall, it's a decent vid. I bumped into some nasty problems. Basically, the image shows that the wavelength of a EM-wave corresponds to the height of the antenna. The visualisation however can't be right since the wave cannot go upwards- the...

I thought this was an easy enough question but then I managed to obtain arguments both for and agaisnt it and confused myself. Is there a clear demonstrable answer to this question in relativistic field theory? Is spatial and temporal orientation a convention?

If you have a free neutron viewed from a known frame of reference which is known to be spin up and it decays, is there anything in theory or experiment which indicates whether the remaining proton will be spin up or down? Thanks Jerry

Hello, Homework Statement I'm given the following exercise: "A rod with neglected thickness exists. What is the relation between the α,β angles to Euler angles of orientation? α is defined as the angle between the rod and its projection on the XY plane. β is defined as the angle between the...

In case the orientation of a primitive cell is not what I want, is there tools to do a user-supplied 3D rotation to bring the primitive cell to the preferential orientation and output the new coordinates? Thanks,

I've been tinkering with a few diagrams in an attempt to illustrate the motion of the solar system in its journey around the Milky Way. I also wanted portray how the celestial, ecliptic and galactic coordinate systems are related to each other in a single picture. Note: in the Celestial, or...

I have been reading through "Complex Analysis for Mathematics & Engineering" by J. Matthews and R.Howell, and I'm a bit confused about the way in which they have parametrised the opposite orientation of a contour ##\mathcal{C}##. Using their notation, consider a contour ##\mathcal{C}## with...

this is a small part of a problem on tidal forces and I wasn't sure what the question asks as it seems to me that more information is needed. Am I right or is there something I am missing? the question goes as: "A spacecraft approaches a neutron star of radius 10 km and mass 1.5 times mass...

For line integrals in vector calculus, \int^a_b F \cdot dl I almost always see the path oriented from a to b. But my textbook has the following (look at the first equation for V(r): Since the integral's limits are from O to r, I would have expected dl to also be pointing in the direction...

Well hello there, My name is Alex, I'm a belgian high school student (currently going to start my senior year), and I'm 17. I love this forum, it helps me a lot when I need an info about physics, the physics major and the jobs associated with physics. I joined this forum because I myself have a...

I've been recently trying to understand the concept of paramagnetism, but I feel like I'm running into 2 conflicting models. Stern–Gerlach seems to suggest that electron spins always point up or down to an incident magnetic field, regardless of their spatial orientation. Similarly, when...

Can Cooper pairs have any spatial orientation within a superconductor? In most graphical depictions of a Cooper pair they are both on the same axis (moving through the same channel within the lattice), and parallel with the current direction. Is there any reason the pair cannot be at a right...

Hi, am working on a vehicle tracking device, i am using LIS3Dh accelerometer to get the acceleration data. i am using TM4c1231e6pz controller. I need to implement a harsh breaking alert, I am having difficulty in finding out which direction the vehicle is moving since the axis are not aligned...

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...