hand Definition and 466 Threads

I'm a surgeon, maths and physics study was a long time ago. I have been working on a project using an accelerometer and gyroscope.to.monitor hand movements during practice procedures. I thought to represent my 3 axis acceleration as a vector and then subtract from this 1g, to compensate for...

Homework Statement Homework EquationsThe Attempt at a Solution I have already solved for the magnetic fields everywhere AND THE magnetic field at R>F = (U/2*PI*R)*(I2-I1) My only problem is i know i use the right hand rule to determine the direction of the magnetic field B as clockwise or...

Hello everyone. I have a Python code which calculates, given a continuos uniform random variable U(-1,1), the order of a interpolation polynomial and a set of points the evolution of a function of this random variable. i.e. v0 = cp.Uniform(-1,1) t = np.linspace(0, 10, 10) order=1 . . . plt.plot...

HI, I've attached a rough diagram(emphasis on rough) of a waiter holding a tray, there is a downward force of 5N acting on the clockwise side, and a downwards force of 25N on the anticlockwise side of the pivot, which is his middle finger. The total force acting down is 30N, so therefore the...

What physical attribute of the electron causes it to experience force in one direction and not the other when it moves in a magnetic field? As a crude analogy, when wind blows in the face of a windmill, we can intuitively see why it rotates clockwise or counterclockwise. It is because of the...

Graph $f(x) = \frac{2}{(x - 3)}$ on the xy-plane by building a table of values. 1. How many values of x must I use to graph this function?2. Must I use the same amount of negative values of x as positive values of x to form an even number of points in the form (x, y)?3. Is graphing by hand an...

1. The problem statement, all variables, and given/known data A one loop wire is lying on the page with a magnetic field pointing into the page. The magnetic field strength is increasing with time, the induced current direction in the loop is: Assume magnetic field is pointing into the page and...

Homework Statement When the hand is rotating about the wrist in the sagittal plane its centre of mass has an acceleration of 3m/s(squared) in a horizontal direction, its mass is 2kg and the vertical direction (i.e. Y) is against gravity. The hand travels through 30 degrees. If the distance from...

This is a more general and probably silly question, but if you have a ball in your hand and you move it upwards, the acceleration will be positive then after you move it at constant velocity, acceleration will be 0. However, how is net force is 0 when the ball is still moving? You are clearly...

Hi there, I attached an image of a basic linear motor. I'm a little confused if I use the right hand rule or left hand rule. I did it both ways and I think the left hand rule is the only rule that allows for a force being applied to the right. I assume the current is going down rather than...

What are the differences between hand eye coordination and reflexes? So when one catches a ball, they must have a specific level of hand eye coordination and reflex / reactions in order to be able to catch the ball. What aspect of catching a ball is related to hand eye coordination and what...

1. Homework Statement I need to use the right hand rule to determine the direction of the force on the current carrying wire shown in the above figure Homework EquationsThe Attempt at a Solution Using the right hand rule, if I point my fingers in the same direction as I, then curl them...

Is there a generally accepted ball-park figure for the force a human can apply to a lever? Obviously, I am not thinking of an Olympic weight-lifter or of my three-year-old granddaughter - just the turning moment generated by the 'average' person standing up and pulling/pushing on an horizontal...

If there is a ball falling from a height due to gravity, and you keep your hand still and let the ball fall onto it, it stops suddenly and makes a loud noise. However, if you lower your hand as you catch the ball, like when a cricketer catches a fast moving ball, the catch is almost silent. I...

I would like to sketch the graph of equation a*b^0.3=constant for a and b are positive real numbers. How do I start? Which one should be as y-axis, and which one be x-axis. This only affects the shape of the graph. The confusing part for me is that should I use b itself or b^03 as an axis...

I have ran an FEA analysis on part screenshot below. I wanted to do some hand calculations to validate the results. What formula should I use to calculate the stress?

Why does ice piece sticks on hand but not wood piece?

There is this science gadget that consists of two parobolic mirrors, one with a hole in it and you place an item in the bottom of one, turn the other mirror with the hole on top of it, and you can see the image of the item standing above the hole in the top mirror. How is this done? Are the...

Hi I am wondering whether tattoos affect chances of jobs getting a phd, that sort of thing? I'm talking about more subtle small ones, i.e. rather than on top of the hand /fingers, on the under-side of fingers, or side of little finger or thumb I know the obvious answer is get them somewhere...

Homework Statement Hello. Given the statically determinate truss shown in the image, solve for all forces in the members, in terms of the load P. Homework Equations Equations of equilibrium. Node analysis. Section analysis. The Attempt at a Solution I was able to solve it by solving first...

Background: (I'm a beginner) I plan on using PCV pipe for the main body. The drill's purpose will be to install screws into pre-cut groves (basically a motorized screwdriver). These screws will be only a couple centimeters tall so the motor will only need a moderate amount of torque and rpm. It...

I suffer from an extremely rare congenital disease known as arthrochalasia (or EDS Type VII). Basically, it means that all of the ordinary collagen in my body is brittle and elastic. I've always had problems with long-winded handwriting - thankfully I eventually was allowed to use electronic...

Homework Statement Homework Equations P=I*(I*)*R/2 The Attempt at a Solution R1 = 12 R2 = 20 L = 0.0531H C = 265.26*10^(-6)F W = 2*pi*60 L -> jwL = 20j C = 1/(jwc) = -j10 Mesh equations: Mesh 1 (left mesh, clockwise) -Vs +I1(R1+L+C)-I2(C)=0 Mesh2 (right mesh, clockwise) I2(C+R2)-I1(C)=0...

Homework Statement Link: http://i.imgur.com/JSm3Tqt.png Homework Equations ##\omega=2\pi t## Fourier: ## Y(f)=\int ^{\infty}_{-\infty}y(t)\mathrm{exp}(-j\omega t)dt## Linearity Property: ##ay_1(t)+by_2(t)=aY_1(f)+bY_2(f)##, where a and b are constants Scaling Property...

Hi, I am a bit confused. So I have a shaft with a step on both sides so it gets really large in the middle. I am trying to model torsion on the rotor of a BLDC motor with FEA (or by hand calculations). If I apply a moment on the sides and fix the faces at the end of the shaft I get 1 result...

The crane that we use in our warehouse is not operational the repair tech said the vector motor is defective. Any recommendation as to where we can find a second hand vector motor?

Homework Statement How many one-pair 5-card poker hands are there in a standard 52-card deck? Homework Equations {}^nC_k = \frac{n!}{(n-k)!} 3. The Attempt at a Solution I've seen the following solution in several different places: n = {}^{13}C_1 \cdot {}^{4}C_2 \cdot {}^{12}C_3 \cdot...

Homework Statement [/B] I am trying to answer two questions: 1. Solve part (b) in the image above by hand. 2. What are the differences between transfer function (a) and transfer function (b). Homework Equations cos(Im(s) / Re(s)) = ζ The Attempt at a Solution 1. For part one given the...

Would it be feasible to wear something on a wrist that could detect when the wearer's thumb is touching another finger on that same hand? Through changes in capacitance and/or resistance maybe – or something? If so, would it be able to tell which finger the thumb is touching? Where on the...

Thought this might be of interest. diogenesNY ------------- New York Times: Astronomers Discover New Likely Dwarf Planet, the Latest of Many By KENNETH CHANG JULY 13, 2016...

Suppose you had a bar that spinned due to a torque load applied, but the pivot was not centered at exactly the middle of the bar. If you arrested the bar with your hands, obviously you are applying a couple to counter the torque to stop it from moving, but your hands are not at equal distances...

Hey, I would like to showcase my experiment I'm doing. I'm 16, in high school, and the only science I know is chemistry. But that was a default class. I'm learning about Quantum Physics on my free time. and would very much like to become a scientist in that field. To start off this is kind of a...

For Flemming's left hand rule, your second finger represents the direction of flow of current (in the current carrying wire perpendicular to a magnetic field), so does the direction of the current show the direction of flow of electrons or does it show the direction of the conventional current...

I have to perform the following computation by hand to get a number within two decimal places: ##\displaystyle (120)(\frac{54.30}{194.79})##. The answer is 33.45, but how can I do this by hand?

Hello! My book explained how to take cube root of a number withou using calculator. I managed to extract the cube root of number less than a million. But when its higher like this one 12812904. I cannot extract it. Can you suggest an algorithm on how to go about this one? Thanks!

I learned the left hand/right hand rule like this: Hold your hand in a stop motion, put your thumb perpendicular to the rest of your fingers. Like making an L sign with your index finger and thumb, but the rest of your fingers are with your index finger. Thumb is charge/current, direction your...

I've been reading the explanation of Britannica.com about the direction of magnetic force on a moving charge in hall effect. "Whether the current is a movement of positive particles, negative particles in the opposite direction, or a mixture of the two, a perpendicular magnetic field displaces...

Just watched the documentary 'Stephen Hawking Grand Design: Did God Create The Universe'. S.H. stated that the big bang was similar to subatomic particles that appear, disappear and reappear somewhere else following the laws of quantum mechanics. If that were so, wouldn't it also be possible for...

Homework Statement Homework Equations Right Hand Rule #3 The Attempt at a Solution For #11 I can do b) left f) downward But I don't understand how to do a,c,e because I don't understand how to use RHR 3 with those inward/outward info for V. And I don't understand D because it doesn't...

[Mentor's note: Thread moved from technical sections so no template shown] So the calculations all make sense. But for example to find the direction of B2= 1.33 X 10-5T I believe you should position your right hand like this: Because your thumb should point in the direction of the current...

Homework Statement An electron is suspended due to the combination of an electric field and a magnetic field. What is the direction of the magnetic field in this region? Don't need to solve this, just need to explain the approach to solve it. Homework Equations Right hand rule 1- thumb...

i get the differentiation the halves cancel the 2 the h bar cancels the h bar square and to get rid of the root in the denominator the entire thing is squared But I cannot understand where the huge square root came from at the end where I circled. Can someone help me here

Homework Statement find the slandered equation of a parabola that has a vertex axis that satisfies the given condition. X intercepts -3 and 5 Y coordinate 4 Homework Equations A(x-h)^2+k=yThe Attempt at a Solution -4(x-1)^2+4

i saw some articles about people with hand prosthesis that also have some sensory feedback trough implants on a nerve in what left from the arm that gets signals from sensors on the artificial hand . but i didn't understand exactly how its work, dose the amputee actualy 'feels' the hand? like...

Homework Statement A particle travels 27 degrees to the y axis, a magnetic field travels parallel to the y axis. In which direction is the magnetic force. Homework Equations Thumb=direction of q Fingers=direction of field palm=direction of force The Attempt at a Solution Basically how do I...

What is the probability that a five-card poker hand contains two pairs (that is, two of each of two different ranks and a fifth card of a third rank)? My attempt: Let us first pick the 3 different ranks. There are {13\choose 3} ways of doing this. Out of each rank consisting of 4 suits, we...

Homework Statement We were given two diagrams in our notes about the right hand thumb rule. Homework EquationsThe Attempt at a Solution Is the second image(one on the right) wrong? Isnt the magnetic flux density supposed to be clockwise in second image? Also is this statement correct...

Homework Statement How many 10-card hands are there chosen from a standard 52-card deck in which there are exactly two 4-of-a-kinds; no pairs or 3-of-a-kinds? The Attempt at a Solution if there are exactly 2 4 of a kinds that takes up 8 of the 10 cards in the hand and the remaining 2 must be...

In the recent android version which is Lollipop the feature of palm showing to mobile to take a selfie after 2 seconds has been removed or I am not able to spot it clearly? There is also a space left in between camera reversal and some beauty thing. Earlier that was there in Kitkat version. Why...

This is completely confusing me, please help. The word that is giving me problems is "direction". The text talks about the "direction of the magnetic field lines" . As I understand it, the fied lines curve around a straight wire. So you can only have two directions, clockwise or anticlockwise...