Reduction Definition and 447 Threads

Velocity of any flowing vapour reduces as it condenses. Can any of you please suggest the equation to find the reduction in velocity of a vapour as it condense. Thanks in advance.

Homework Statement I am in a calculus class where we are learning the introduction to row reduction. I have done this before in other courses, so I am familiar with the process, but I am not sure about this one. We were given: x4 + 2x5- x6 = 2 x1 + 2x2 + x5 -x6 = 0 x1 + 2x2 + 2x3 - x5 +...

We're doing electrochemistry this week and this concept confuses greatly. I know that voltage is the work per unit charge. And electrons move from high potential(is this voltage as well?) to low potential- what is meant by this by the way? How is this related to standard reduction potential? If...

Hi. My name is abi. I was wondering if anyone knew how to remove pupil ghost from images using the rmpupil command in IRAF.

Hi Folks, I have been studying some scanning electron microscopy and read that the SEM tip is made from tungsten but is coated with a mono-layer of zirconium-oxide to reduce the work function from 4.5ev to 2.7ev, to make it easier to emit electrons (this is a field emission SEM). Does anyone...

Homework Statement My problem is with a portion of a much larger problem, I'm working on an exercise involving the production of synthesis gas in where there's a reactor in which it is postulated that the following reactions take place: CH4 + CO2 ⇔ 2CO + 2H2 CO + H2O ⇔ CO2 + H2 CH4 + H2O ⇔ CO...

Hello, Does anyone know a method to reduce the number of decimals in the answer when multypling with a number with 15 decimals? What I want to achieve an answer with 4 decimals or less. x * 86,4716007952918 = y,yyyy X can be any number. Nicolai

This is one of the example problems in my book to show how to deal with integrating trigonometric functions to higher powers, by breaking them down into identities. $$=\int cos^5x dx$$ $$=\int (cos^2x)^2cos^x dx $$ $$=\int (1-sin^2x)^2*d(sin x)$$ $$=\int (1-u^2)^2 du$$ $$=\int 1-2u^2 + u^4...

Can someone show me how I would "use" the reduction formulae for $$tan^n x$$ ? I just want to see an example on when I would ever use it. A simple one will do.$$\frac{tan^{n-2}x}{n - 1} - \int tan^{n-2} x dx$$

Homework Statement Use resistance reduction and source transformation to find Vx in the circuit below. All resistance values are in ohms. Homework Equations The Attempt at a Solution For this problem, I know I can combine the 16 Ω resistors, but where I'm having a little trouble...

If I_{n}=\int_0^1 (1-x^{3})^{n} dx, use integration by parts to prove the reduction formula I_{n}=\frac{3n}{3n+1}I_{n-1}My attempt: let u=(1-x^{3})^{n}, and dv=dx. Then I_{n}=[(1-x^{3})^{n}x]_0^1 - \int_0^1 -3x^{2}n(1-x^{3})^{n-1}x dx = 3n \int_0^1 x^{2}(1-x^{3})^{n-1} dx. But I don't know where...

Homework Statement Write and row reduce the augmented matrix to find out whether the given set of equations has exactly one solution, no solutions, or infinitely many solutions. -x+y-z=4 x-y+2z=3 2x-2y+4z=6 Homework Equations The Attempt at a Solution I saw right away that...

Why the electrical purification of copper involves both an oxidation and a reduction process.

Would the electrochemical reduction of H2 form Hydrogen Anions of H- H2 + 2e- -> 2H- If this is the case, is the following true? H- + (1/2)H2 -> H2

Hello, I'm working on a project for my college class where we need to build a windmill that will be able to lift a 5lb mass 3ft above the ground. The energy of the wind is produced by two 20 inch box fans. We are allowed to use several materials- pine wood, ice cream pails, floss, nuts, bolts...

Okay, so I am having a problem, I'm not the greatest at math, here is the problem: I need a set of reduction gears, my plan is to have a gear attached to a shaft (base diameter of this first gear is 33mm) with 50 teeth (maybe?) To turn a reduction gear that will be on another shaft that will...

Hi, I'm practicing some of the methods for solving LODE's for my exam tomorrow afternoon and am struggling to understand one of the steps, I'm hoping someone will be able to explain it for me :) So I have the equation $(x-1)y''-xy+y=0$ with x being a solution. Then: $y(x)=xv(t)$...

Here is the question: I have posted a link there to this thread so the OP can view my work.

what types of chemical reaction does not have oxdiztion and reduction...

Hello, I am new here and have a question about sizing a chamber for pressure reduction. I am going to run CO2 75 degree at 1000 psi into a chamber that is 150+ degrees. What size chamber...or what volume rather do I need to drop down to the 2-300psi range? I am sure this is a vague...

Hi, i have to reduce the order of a 2nd order differential equation, to solve it with a numerical method. The equation is: \ddot{r}+a\dot{r}+\frac{b}{r^{2}}=0 with a,b\geq0 I tried to reduce it substituting \dot{r}=v, but i don't know what to do with the term \frac{b}{r^{2}} ...

Hi, Can anyone help me to inverse the below matrix by row reduction method. I know determinant method but I don't know row reduction method please help me. 4 5 -2 6 thanks.

Hello everyone, I have a question about virtual corrections of an external fermion line. According to the LSZ reduction formula and what some other people say, we neglect the self energies of external legs and multiply the wavefunction therefor just with a squareroot of the wave function...

Homework Statement The attached file has a circuit reduction which I can understand all but the missing capacitance C between B' and C' to the ground each from figure (a) in figure (b) Homework Equations N/A The Attempt at a Solution Shouldn't there be another capacitance of 2C in...

Good afternoon, I am trying to size a reduction orifice for a desired pressure drop. I do not need the drop to be specific, since this is just for valve protection and not for metering. D1 (Pipe) = 2.5" P1 = 125 PSI P2 Required = 75-85 PSI Q = 1020 gal/hr Fluid = Water, 90 Deg F...

Here is the question: I have posted a link there to this topic so the OP can see my work.

I'm not sure if this question belongs here, if that is the case I'm sorry. I've been desperately trying to install IRAF on windows. Nothing seems to work. I've considered installing a Linux distro but since I'm using windows 8 that is not an option. So my question is: has anyone been able to...

Why is Cr2+ reducing while Mn3+ oxidizing when they both have d4 configuration?

In the tensile test practical for ductile materials, up to the elastic limit, the deformation is recoverable (no line defects). My question is can there be a reduction of area with the elastic deformation? If yes, how it happens? I'm a beginner. Thank you!

Hello good people, I'm a junior engineer currently studying in an Adv.Diploma in Mechanical Engineering. I have been tasked with the project of designing a gearbox and I'm having a bit of difficulty getting started as I'm not that experienced with gears. The client requires a 25:1 reduction...

If the holographic principle says that the the observable universe could be represented as a two dimensional surface, and we accept the idea that the universe is itself a mathematical object, and cantor showed that we could in some cases represent higher dimensional sets within lower dimensional...

Referring to the paint document. Could they have easily changed m into m + 2 or m + 1.5? Or does it have to contain the variable m and n?

If the velocity of air flow through a grill is halved but the area of the grill is doubled, By what factor will the sound power be reduced? air flow through a grill represents a dipole sound source, so it depends on the 6th power of velocity, but how does it depend on the area? If I take sound...

Homework Statement Mild steel bar 40 mm diameter and 100 mm long, subjected to a tensile force along its axis (through central length) Youngs Modulus = 200GN m^-2 Poisson's ratio = 0.3 Calculate the force required to reduce the diameter to 39.99mm (there is also a picture saying Use...

Homework Statement Determine what redox reaction, if any, occurs (at 25° C) when lead metal (Pb) is added to 1.0-M solution of NiCl2 Homework Equations Ecell = Ecathode- Eanode Here is standard reduction potentials given for Pb and Cl Pb2+(aq) + 2e- → Pb(s) E°(V) = -0.13 Cl2(g) 2e-...

Refer to the attached image Overview The feed to V12 comes from distillation unit, where batch production rate is 16 Ton/day and at 220 degC. At first it is cooled to 160 degC in V12. Now this bulk is transferred from V12 to V18 using N2 gas pressure. All the transfer lines are jacketed...

Homework Statement Given N=1 SYM in 10 dimensions (all fields in the adjoint representation): \int d^{10}x\, Tr\,\left( F_{MN}F^{MN}+\Psi\Gamma^M D_M\Psi\right) D_M\Psi=\partial_M \Psi+i[A_M,\Psi] is the gauge covariant derivative. Reduce to 4 dimensions A_M=(A_\mu,\phi_i)...

When balancing oxidation reduction reactions involving acids or bases, what (in the case of acids) allows you to add H+ ions to one side of the reaction and H2O to the other, or in the case of bases, OH- and H2O to balance out hydrogen/oxgen? Normally you are not allowed to just add random...

what is meant by oxidation and reduction and what are the differences between them?Though there is oxidation number why there is no number to represent reduction?

Hey Guys I am Currently doing my degree in information systems. At the moment the subject is PLC(Processing and Logic Concepts) I understand all of it, I am not sertain on how to start reducing a boolean expression. Once the first step is done I normally get it and can complete the...

I need to reduce the lubricant temperature in a motorcycle engine.? I've been allotted this project in a motorcycle company in India in which I need to reduce the average temperature to which a lubricating oil gets heated up, in an engine for one of their models. Now I did see the flow path of...

Dear engineers and physicists, I would like to ask you a question about Component Mode Synthesis (CMS), which is the topic of my bachelor thesis. My primary resource is the classical AIAA article "Coupling of Substructures for Dynamic Analyses: an Overview" by Prof. Craig. For now I am...

Homework Statement Under the assumption that BETA is a closed term show that (λx.α)(β) and α[x→β] are logically equivalent. Homework Equations I'm sure I have to use β-reduction but I'm not sure how in this case: ⊢(λx.x)(β→α[x→β] The Attempt at a Solution

I am trying to complete the following question: By pumping the air pressure in a tank is reduced by 15%/second. The percentage of air pressure remaining is fiven by the formula. p=100(0.85)^t Plot p against t for 0 < t < 30s. Deternine the rate of change at 5s & 10s. I have plotted...

I'm wondering if the following is possible. Consider some inertial coordiante system x, y, z, and a rotating coordiante system p, q, r defined through matrix rotations as follows. \begin{pmatrix} p \\ q \\ r \end{pmatrix} = R_1(\theta_1(t)) R_2(\theta_2(t)) R_3(\theta_3(t))...

Hi everyone, :) One of my friends gave me the following question. I am posting the question and the answer here so that he could check his work. Question: This question concerns the differential equation, \[x\frac{d^{2}y}{dx^2}-(x+1)\frac{dy}{dx}+y=x^2\] and the associated homogeneous...

Hi, can someone please explain to me how I can identify which is the oxidation half and which is the reduction half of a redox reaction. I have read on the internet that the oxidation half is the highest up the table between the two then why doesn't it work for: (Ca^2+) + 2Br → Ca + Br2...

Hi! In a speed-reduction drive, because the power transmitted is almost constant, as the speed decreases the torque increases. Is this reduced rear wheel/shaft speed the same when the loaded condition is considered? Let's assume that the prime mover is rated to produce 1.4 mN torque at...

Homework Statement Welding robot is defined by the block diagram attached/ excuse the paint work. (hope that worked) find: a)maximum value of K required to achieve stability. b)roots of the characteristic equation, at half the maximum K value. c)estimated percentage overshoot, if the...

Homework Statement (x-1)y'' - xy' + y = 0, y=e^x is a solution Homework Equations The Attempt at a Solution Assume the second solution is of the form ve^x, where v' = (y^'2)e^-int[-x/(x-1)] So v' = e^(-2x)e^(x+ln|x-1|) = e^(ln|x+1|-x) Then, this second solution must be...