Request Definition and 194 Threads

I need to understand the mechanics involved in performing a wheelie. That includes analyzing the free-body diagram. And considering all the factors involved in performing this manoeuvre in motorbilkes.

I am aware of the Newtonian model of Gravitation and I am interested in Relativistic Mechanics. I do not know anything about relativistic mechanics other than its more "accurate" at modelling gravitation and that it "reduces" to the classical formulation in some cases. I only want to be able...

Planning a kitchen renovation. We've found a SIEMENS iQ700 glass downdraft extractor [model LD98WMM60B] that we'd love to use. It, of course, is only available in EUROPE. EAN code : 4242003907122 Connection rating : 300 W Fuse protection : 10 A Voltage : 220-240 V Frequency : 50; 60 Hz Plug...

Summary: Request for an example of minimum energy principle usage The minimum energy principle states that, for a system at constant entropy, volume and other extensive quantities, the internal energy is minimized at equilibrium. Can you give me an example in which, using this principle, is it...

Does anyone on here have a 3D printer for metal? I'm looking to get a custom made socket wrench fabricated for 10 mm bolts or nuts. I'm looking for one that is extremely low profile. I don't care about the drive style (1/4", 1/2", 3/4", 1", external hex etc). The smallest mass produced one I...

https://lh5.googleusercontent.com/9QsQWXl9st7BwAufKwea7kxOpXwRzJCEIvN0MWmtaJy9aHgfopZQQ0pYHtcXfoNAJzGbP-x89zFcYwzI7FcZnNlHRI3eezngpJUJq1tPIYpCUImKTqvRlDTjScYf7n0jY9-NoMZLgl9dt-MOLQ Its explanation-...

According to the law, can a defendant or Plaintiff change his/her lawyer after certain court proceedings in both civil/criminal cases. Example. A Court is adjourned and given a certain date for next proceeding. Now the Plaintiff or Defendant would like to change his/her lawyer giving...

I am wondering if any of the scientists here with access to the necessary equipment would be willing to demonstrate this phenomenon under vacuum. A chamber of appropriate height or rigging the beads to a drill(as shown in some variations of the experiment) should suffice. My reason for this...

I’m planning to write a 2D Minkowsky spacetime diagram generator tool. At this point, I am looking for help reviewing the specification. I am not looking for help with the implemenation. To be clear, I’ve written a complete specification, but it would be a waste if it was missing features that...

If ##(u,v)## are null coordinates and ##S(u,v)## a two-surface of constant ##u## and ##v## then the Bondi-Sachs mass ##M_{\mathrm{BS}}(u) = -\dfrac{1}{8\pi} \displaystyle{\lim_{v \rightarrow \infty}} \oint_{S(u,v)}(k-k_0) \sqrt{\sigma} d^2 \theta## satisfies (Poisson, 2007)\begin{align*}...

Problem: Tablet is not detectable by computers. Yet... it is noted as "Unknown USB Device (Device Descriptor Request Failed)" in the device manager under Universal Serial Bus controllers. I have already done the basic 30 articles reading and tried the standard suggestions including: Try a...

Summary:: I've written a song based on a lecture I attended re: the universe. I'm hoping to confirm facts re: Dark Matter, etc. discussed within the song. I have a somewhat unusual request: I have written a song based on a lecture I attended re: the universe. Before recording and releasing...

The paper I refer to, I found on the Big Think blog titled "Is human consciousness creating reality? And here is the actual link to the paper. Unfortunately, this paper is too technical for me, hence the request for a review for such a big claim.

There is a nice fact. It approximately sounds like that: Let ##H=H(p,q)## be a Hamiltonian system with ##n## degrees of freedom such that all its orbits are closed. Then the periods of all the orbits belonging to the same energy level are the same. Please which textbook does contain this? I...

Is there an up to date list of all cosmological theories resource which provides some or preferably all of the following information: Which theories are considered speculative and even highly speculative? (degree 1 to 4) Which theories are still actively being worked on and roughly how many...

Sir/madam, I request you to solve 2 questions ( q-3 and q-5 ) of symbolic logic ( Strenthened method of conditional proof ). These questions are taken from I.M.Copi's 'symbolic logic' ( edition -5, sec. 3.8, pg- 61 ) File is being attached. thank you yours truly Deep Kumar Trivedi

Hi, I want to frame the above Probability question for computer science students. I have stated my idea above but I want to refine it so that it becomes a more comprehensive real world problem. Zulfi.

Can someone simply screenshot this figure and send to me: Consider Figure 5.4 d) on page 153 of Hecht. As shown, converging rays that are headed toward the point F convert to a plane wave upon hitting the boundary between n2 and n1.

Hi all. I'll get to the point. I've been interested in electricity since I was in college. Concepts such as current and resistance seemed easy to grasp for me but voltage remains a little bit obscure. It's thanks to this forum (specially forum members Jim Hardy r.i.p and SophieCentaur, sorry if...

Hi I've been reading Peskin & Schroeder lately and I have some confusions over the ward identity. So I think I understand how the identity works at a practical level but not exactly where it comes from. To illustrate my questions (which are difficult to state generally), I will make use the...

Hi, Could you please help me with the queries below? Please have a look on this attachment. Question 1: It says, "Because the processor cannot know when an interrupt will occur, it automatically saves on the register stack status information about the program that is executing at the time...

A) I understand that an 'Ideal Fluid' Describe Behavior of Matter in Phase States of liquid/gas and sometimes Bulk-Solid: -continually deform under applied shear stress or external force -usually zero shear modulus -behavior can further be specified by Constitutive Material model for that fluid...

The Faraday paradox is a very curious example in the topic of relative motion. An experiment demonstrating the curious results is shown in the video below: This has made me curious about the linear version of the Faraday paradox. A conductor placed atop a magnet, both at rest in one scenario...

I am writing some automatic differentiation routines for Taylor series, and would like to verify my results for the value and first six derivatives of ##sinh## and ##cosh## evaluated at ##\pi /3##, and also ##tanh##, and ##sec^2##, evaluated at ##\pi / 4##. I have attempted to use this site to...

Homework Statement Coefficient of xy(z^-2) in (x-2y+3(z^-1))^4 Homework EquationsThe Attempt at a Solution [/B] I was wondering if anyone could give me an explanation for my answer? The coeffecient of xy(z^-2) does not = 4 where I would be able to use the multinomial theorem. So since I...

As the title says, I would like to self-study multivariable real analysis (integration, specifically; the Riemann integral) and I need some recommendations (resources, books, videos, ...). I'm from Croatia and got my hands on some Croatian notes about multivariable real analysis so if some of...

I took a stab at simplifying Special Relativity, but I want to be 100% sure I'm not butchering physics in the process. Anybody care to weigh in on that? Here is a draft of my Medium article: https://medium.com/@philipkd/special-relativity-explained-with-a-deck-of-cards-f99bfd873bd5 Thanks, - Phil

Hi. Can anyone recommend a text introducing differential forms along with all the necessary pre-requisites for understanding them? For example, I'm not really familiar with tensor calculus but would like to shortcut studying it completely separately to learning differential forms. If that's too...

Hi! Can anyone recommend a good introductory book for measure theory? I've found Terence Tao's online book to be a good start, but would I be asking too much if I wanted something even more introductory? Ultimately I'm working toward Ergodic theory (and probability theory along the way) with...

Greetings… I am interested in philosophy and while reading about "philosophy of physics" I came across "Quantum Physics" (quantum mechanics to be exact). I need a book (or several books if one can't encompass what I want) that explains the experiments that were conducted on this matter and the...

Hi All, I am trying to up my game in SQL Server in general. Specifically, my knowledge has been obtained so far by working with very small-scale databases ( fewer than 200 rows). Does anyone know of free larger-scale databases that are available? Thanks.

Hi there, I have been searching multiple websites and forums but have not found a cohesive answer to my queries. I am currently going through this textbook to learn pre-algebra: https://www.amazon.com/dp/0618250034/?tag=pfamazon01-20 Also, is this a good book to be studying as an autodidact...

Hi. I would like a source code to integrate the ikonal equation. I would like to compute the ray path. Of course I am able to compute the phase refractive index n(x,y). Cartesian system is preferred. Can anybody give me a suggestion? Bye, Carlos

Homework Statement Assume a uniform hollow cylindrical copper tube with the following parameters: Inner radius = R0 Outer Radius = R1 Length = L1 (Length > Outer Radius) Mass = M1 Now assume a cylindrical permanent magnet with the parameters: Length = L0 (L0 < L1) Mass = M0 Magnetic...

My research requires using the multilevel structural equation model (MSEM). I've read countless articles related to MSEM and I have not been able to pinpoint the best program. They vary from SPSS, MPlus, SAS, LISREL, AMOS, R2, etc. Any recommendations? I've asked around my academic circle and...

Hi All, I need to do some work on Factor Analysis on Non-Continuous variables. I have searched the web, but found nothing of much substance. I would appreciate references on helpful sources on it. Thanks.

Hello I'm trying to come up with a solid Lab to use for my chapter on Waves and Optics. I am considering having it center on refraction. Here is the problem: All labs I create for my class must avoid being a set of instructions for the student to perform. The must always be set up as a...

I've spent 10+ hours on trying to solve this and can't get it to work! In short, I have a method private async void LoadAndSavePage(object source, ElapsedEventArgs e) { // ... } which is being called every 1 second when the Windows Service that contains...

First off, sorry for posting yet another one of these threads. I've scavenged through this forum for undergrad textbook recommendations and have been somewhat overwhelmed. I'm beginning first year soon and would like a textbook that I can rely on as either my main textbook, or at least a...

Hello everyone, I have a request. Can someone please provide me with a metallurgy research design template? I'm starting my 5th year in a MSE PhD program and for the last 3 years my advisor has instructed me to perform experiments on my alloy without reason. And while I thought this was...

Hi everyone, So to provide some background, I'm a 20 year old student in a community college who is about to transfer to a 4 year school in the coming winter. My interest in physics is fairly recent, as I was planning on becoming an astronomer when I entered college, but took an algebra based...

Homework Statement , relevant equations, and the attempt at a solution are all in the attached file. I was reading through Invitation to Discrete Mathematics and attempted to solve an exercise that involved a proof. I've typeset everything in LaTeX and made a PDF out of it so that it does not...

I've recently patented a device which converts high speed rotary motion to slow speed, ultraprecise, high force linear motion using a single, compact moving part. I've just begun the marketing/licensing process but am having trouble getting any useful feedback. If you'd be so kind, please look...

Hi! I am a student who is passionate about engines and mechanics (although the major I'm pursuing is CS.I believe we must not inhibit our intellectual curiosity). The following link will take you to the picture of an uncovered General Electric Next Generation Turbofan engine used by the 787...

I study a textbook in Discrete Math 7e Rosen , I am in ch.4 Number Theory Mainly for computer science improvement (cs) Is it ok study same time a Probability & Statistics textbook again for cs...? I have background in Calculus I II and Linear Algebra & web development.

Hi All,' I remember there was a site where one could search using math symbols, like > , and Math terms. Anyone know what the name/address of that site is? Thanks.

There is a story of the inventor of chess. The king wanted to reward him with riches, but he only asked for the following. One grain of wheat for the first square, two on the second, four on the third, doubling the amount for each square until 64 squares are accounted for. Questions 1) Design...

Hello, I just finished high school and will be starting a math degree next year. However, I have recently become interested in physics and am thinking of switching to a joint math/physics degree in year 2, so I will want to spend my first year privately studying some select physics books. My...

Thank you for taking the time to stop by this thread. I am in a Computer Science Engineering course and have just finished my first year. I don't think the first year was very fulfilling in terms of quench in my thirst for knowledge. But that's alright because it was largely unrelated to my...

I've started using LaTeX to take notes on Donald Fitts' Nonequilibrium Thermodynamics. After I finish, I intend to use other resources to add more to it. Fitts' book focuses on classical fluid nonequilibrium thermodynamics (i.e. doesn't use statistical mechanics but instead uses continuum...