Treatment Definition and 165 Threads

Homework Statement When the thigh is fractured, the patient's leg must be kept under traction. One method of doing so is a variation on the Russell traction apparatus. If the physical therapist specifies that the traction force directed along the leg must be 25N, what must W be? Homework...

I am a third year undergraduate physics major. Often time people ask what I want to do with physics, and I didn't really have an answer for them. I guess I always assumed I'd pursue a masters degree in some kind of engineering, but I want to be able to do something that I'm passionate about...

I am a third year undergraduate physics major. Often time people ask what I want to do with physics, and I didn't really have an answer for them. I guess I always assumed I'd pursue a masters degree in some kind of engineering, but I want to be able to do something that I'm passionate about...

There are plenty of examples where someone derives the magnetic force from a current carrying wire on a moving charged particle by looking at the frame of the particle and finding that the current has Lorentz contracted in such a way as to produce an electric field in an otherwise neutral wire...

I want to know more about hair loss issue. The basic idea to stop hair loss by knowing the main cause of hair loss. Also provide some valid hair loss treatment available in the market

Hi everybody, In Robert W. Boyd's book "Nonlinear Optics", the quantum treatment of the nonlinear optical susceptibility lead to the next expression, for the second order case: \chi^{(2)}_{ijk}(\omega_{\sigma},\omega_q,\omega_p)=\frac{N}{\hbar^2} P_F\sum_{mn}...

I am looking for a rigorous (preferably HIGHLY rigorous) treatment of the trigonometric functions from their definitions through to basic relationships and inequalities through to their differentiation and integration ... and perhaps further ... Can someone please suggest (i) an online...

Hello, I am trying to understand the details of the full treatment of synchrotron radiation. I am using Rybicki & Lightman (1979), along with the more detailed treatment given by Longair (1992). For instance, in Longair, chapter 18 (p.240 in the Second Edition), I see that the radiated energy...

Hey Guys, I was wondering in Sewage treatment plants ,how are detergents (Bleach and such )generally dealt with ,especially if the treated output is expected to be used in agricultural applications and such . Thank You

hello this is the first time I'm using this forum so I hope that my post is in the right sub-forum I'm working now on a project for water treatment , I don't know exactly how to design the setup of the experiment. what is needed 1- 50l feed water tank connected with a pipe , I have to...

"Precipitation hardening is a heat treatment that distributes secondary phases more evenly in an alloy..." What does it mean by a secondary phase?

Hey Guys, I would like to know from some of the more experienced engineers out there how you would go about ball-pointing the feasibility of a sewage treatment plant at the get go. In other words ,before anyone decides to spend any money on a thorough feasibility study. Namely ,I'm interested...

I am designing a surgical instrument which will be impacted many times over its life cycle. We are trying to determine the best heat treating option for the steel (17-4 precipitation hardened) so that we maximize its usable life. Typically, we heat treat 17-4 to H900. However, I'm not sure...

Hey, could someone please explain in detail the differences between a wrought alloy, a forged alloy and a cast alloy and give some example applications as to where each type of alloy would be the best. Thanks :)

I've been reading, in my own time, a first course in thermodynamics and they present a quantum treatment of statistical mechanics (discrete energy levels), but on the article for the partition function on wikipedia, I find out that there is a classical treatment of statistical mechanics as well...

Is it true that the reaction 2 H2O = H3O+ + OH- has a different equilibrium constant to that of Kw, H2O = H+ + OH- ? How can that be? If we want a decent treatment of an acid-base system using [H3O+] rather than the less accurate [H+], what modifications do we have to make to the process used...

My tutor showed me something today, and I still can't completely wrap my head around why it makes sense. Consider the following integral equation: ##\int f(x) = f(x) - 1## Then: ##\int (f(x)) - f(x) = -1 \implies f(x) \left( \int (\text{Id}) - 1\right) = -1## so we get the geometric series...

Q: Which of the following mutagenic treatments would be least effective in creating a mutation in non-replicating cells? Explain your choice. a. Treatment with a deaminating agent like nitrous acid b. Treatment with an alkylating agent like MMS c. Treatment by exposure to UV d...

I hesitate to post this as it sure sounds like woo but it comes from an Irish University Prof. and appears to be endorsed by the Royal botanic gardens at Kew! Does anyone know of a peer reviewed paper...

I remembered a case where a girl died of diabetes complications because her parents chose to pray instead of take her to the hospital. I just looked it up to see what kind of punishment the parents received, and it's pathetic. Wis. court upholds convictions of parents who prayed for dying girl...

I realize this is something I should probably know intuitively, but why are core states (generally) treated relativistically in density functional calculations? What exactly makes these relativistic bound states rather than non-relativistic? I think this is some basic physics I'm forgetting.

Hello. Currently I am doing a test on a vacuum heat treatment machine and came up with an unsolved problem for the past 2 months. I am out of clue and I’m here to hear everyone's opinion. Below are the steps what I did. 1) Vacuum chamber pumped down to 4.5E-04 Pa (Rotary + Mechanical booster...

How do we systematically calculate the molar solubility of a substance with regards to its Ksp? In other words, where does the value of "molar solubility" fit into the equilibrium calculations? This should build up so that I can understand how to systematically treat the common ion effect...

what is the best heat treatment for mild steel which will produce hardest result when tested in laboratory

I will be treating carbon in 3 steps under reflux and I would really appreciate some suggestions, tips and advice on getting a proper and SAFE setup in the lab. I have at my disposal a fume hood and standard laboratory glassware. Treatment 1: 20g carbon treated with 100mL 65% Nitric Acid under...

Hi all, I've been having a look at Thidé's treatment of magnetostatics in the free ebook www.plasma.uu.se/CED/Book/EMFT_Book.pdf A couple of questions, about embarrassingly simple matters that I've forgotten: 1) In equation (1.11), is it a mistake that the magnetic force between two...

Hi, I'm new here. And i have much wonder about the technology in the field of nuclear waste treatment. I have no idea where to find some info. and resourse. Can anybody provide some info of them? Much Thx.

Hi there, I am looking for books that treat signals and systems from a mathematical perspective. When I say "signals and systems", I am referring to the typical second/third year material taught in EE programs: system characteristics (causality, memory, stability), LTI systems, linearization...

I having a bit of trouble understanding Joos's treatment of virtual displacements. I am referring to pages 114 and 115 of Theoretical Physics, By Georg Joos, Ira M. Freeman http://books.google.com/books?id=vIw5m2XuvpIC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false...

Homework Statement Calculate the molar solubility of Ag2C2O4 (silver oxalate) in a solution that has a fixed H3O+ concentration of 1.0 x 10^-6 M. Homework Equations The Attempt at a Solution I found the pertinent reactions, the charge balance and the mass balance so far, but I...

Hello, As far as I understand Chemotherapy intends to stop cancer growth and reduce it as much as possible as well as to destroy cancerous cells in the blood stream to avoid metastasis. Now, and again as far as I understand, if someone else cancerous cell would enter my bloodstream my...

This question pertains to the classical treatment of Larmor precession.I don't know whether to put it in the Classical Physics forum or this so I am putting it here. In the treatment we assume that the potential energy of the dipole-magnetic field system remains constant because there is no...

I'm currently in the midst of a QED course which presupposes a lot of relativistic QM, which I never saw in depth. I have found some good resources on the Dirac equation and its consequences, but most of them glance over the non-relativistic limit. While not crucial for what I need to know, I...

Hi, I'm really struggling with a statistical problem: 5 people had a medical treatment, they were tested before and after using a questionnaire which recorded some numerical data. I want to analyse the before and after results to see whether there was any change, whether it is...

"economic physical methods" for surface treatment of plastics I am a material science student, working on a plastic based composite (reprocessed polyethylene solid form, mixed with cement). Initially, the mechanical strength of composite was lesser, probably because of the poor bond...

I can't seem to find anything about the heat treatment specific to austenitic stainless steels. (e.g. SS 304, SS 316L) The info I need is pretty much everything that has to do w/ the heat treatment of stainless steels (benefits, procedure/process, equipment ...) The only thing I have...

This is to clarify Landau's treatment of polarization in his classical fields book. Say we have a monochromatic plane wave \mathbf{E}=\mathbf{E_0}e^{i(\mathbf{k} \cdot \mathbf{r} - \omega t)} and we want to make a vector \mathbf{b}=\mathbf{b_1}+i\mathbf{b_2} where...

I'm struggling to figure out whether measurements of the second kind can be treated using the unitary ansatz. as far as I can gather Von Neumann's measurements of the first kind can be modeled as below: for system being measured S and apparatus A with states |S1>, |S2> and |A1>, |A2>...

I have just started my first real analysis course and we are using Spivak's Calculus. We have just started rigorous epsilon-N proofs of sequence convergence. I was trying to do some exercises from the textbook (chapter 22) but there doesn't seem to be any mention of epsilon-N in the solutions...

Hey guys, I'm looking for a good treatment (good = concise, and clear) of affine geometry. Connections, parallel transport, etc. I'm looking for this from a mathematical P.O.V. Most of the differential geometry books I have deal only with the exterior forms, and general manifolds without this...

I just came across this thought-provoking opinion article in the NY Times. http://www.nytimes.com/2012/01/29/opinion/sunday/childrens-add-drugs-dont-work-long-term.html?pagewanted=1&_r=1 It raises some important questions so many years into using medications to treat ADD, including whether...

Can one tell me if the treatment of the Mach-Zehnder interferometer in the attachment is correct ?

What test or distribution should I use for before and after treatment? Say, I have 30 subjects I test their blood before and after a pill they take a pill, what kind of test should I use? I want to test mean difference, so, paired t-test? or Wilcoxon signed rank test? The data looks like this...

Error treatment on temperature~~ I recently did an experiment at school. I don't know how to calculate the error of temperature after changing the unit of temp. from degree celsius to kelvin. Here is the question. Let T=23 °C ± 0.5 What is the error after changing the unit to kelvin...

I just read this article in the New York Times, and I'm surprised it's not bigger news considering how important it could be if the treatment turns out to be as effective as it seems: http://www.nytimes.com/2011/09/13/health/13gene.html?pagewanted=1&_r=2 Later they mention it giving the...

I'm a physicist, but I'm not a specialist in the foundations of quantum mechanics. This month's Scientific American has an article by Vlatko Vedral about entanglement and decoherence. Paywalled article, with a brief summary...

Flame Treatment Machine, need help... I work for a automotive supplier company. I am needing to fabricate a Flame Treatment Machine to Flame Treat the Parts before applying a adhesive shim. The Flame Treatment Improves the Dynes of the parts for better adhersion of the shim. I am fabricating a...

Could anyone possibly explain how ferrofluid is used in cancer treatment? Is it via an electromagnet or an alternating current? Have Googled but am none the wiser. Is ferrofluid difficult to warm up? What sort of temperatures are we talking about? Many thanks

Newbie to the forum, so forgive me if I post this in the wrong place! If I heat steel (a bearing outer race to be exact) from room temperature to approx 200C, the hardness of the steel will reduce. If the temperature is then allowed to reduce back to room temperature, what will happen to the...

I've been playing around with some proofs and find myself relearning how I do my mathmatical thinking. Just a general question regarding how to handle something like this. 0<a<b So a and b must be positive a/2 <b I just divided one side by two instead of "dividing through" like you...