Reduction Definition and 447 Threads

Homework Statement Use half-reactions and E's to determine the result of storing a solution of CuSO4 in a tin container. Homework Equations [Table of Standard Reduction Potentials of Half-Cells] The Attempt at a Solution My question isn't exactly how to do this question. I was just...

Homework Statement Hi all, In a sodium borohydride reaction, one of the hydride in BH4- will attack the ketone, and the O- in the ketone will bond with the BH3. This would continue until all the hydride ions are used up. My question is..what would be the driving force that makes the...

Homework Statement Use row reduction to show that: [1 1 1] [a b c] = (b-a)(c-a)(c-b) [a^2 b^2 c^2] Homework Equations The Attempt at a Solution So I multiplied -a by row 1 and added it to row 2. I then multiplied -a^2 by row 1 and added...

Please click the image to enlarge it http://img237.imageshack.us/img237/3605/untitlednu9.th.jpg I'm having trouble seeing how this circuit was reduced. Can anyone shed some light on it for me? My question pertains to the second solution in the image. I see that the 12k and 4k...

This may be of interest to readers: http://www.flightglobal.com/articles/2007/01/23/211641/airbus-a350-xwb-set-to-be-quietest-generation-of-airliner-as-manufacturer-improves-zero-splice.htm A noise reduction engine nacelle intake. "A zero splice liner with a continuous surface and lacking...

I just started Digital Systems coursework and it seems our professor felt like giving us a book that has no examples and progresses the class with no examples as well. So basically we are stuck trying to learn Boolean algebra reduction with no real guidence. Great. Anyways, I'm looking...

I have two simple questions but I'm not 100% on how to get the correct result. 1. "The noise is reduced by 6 dB" means its amplitude is cut to _%? How is it calculated to 50%? I try 20log(Av)... 2. Does this wave contain 30k hertz sine function? (see attachment) The answer is yes, but I...

I know that purpose of the preemphasis filter in a noise reduction system is to increase the amplitude of the input signal at frequencies where SNR is low prior to transmitting the signal. I also know that a deemphasis filter is located at the receiving end and its purpose is to undo the effects...

Hello, In a lab experiment, we filled 2 wells of a culture plate, one of them had 1.0 M CuSO4 and a piece of zinc metal, and the other well had 1.0 M ZnSO4 and a piece of copper metal. My question is: Which well has the reduced form of zinc and the oxidized form of copper? I know that...

Use reduction of order to find a second solution of the given differential equation t^2y"-4ty'+6y=0 t>0 y_1(t)=t^2 first I put in in the standard form y"-4/ty'+6/t^2y =0 then y= v(t)t^2 y'=v'(t)t^2+v(t)2t y"=y"(t)t^2+v'(t)2t+v'(t)2t+v(t)2 = t^2v"(t)+4tv'(t)+2v(t)...

hello everyone, I am stuck on this problem and i have a hard time figuring out how they went from here dw/w=-(2dx/x(x^2+1)) to here w=c(x^2+1)/x^2. i know they integrated, but can anyone show me the details of the integration along with an explanation?

I've been wondering if it is possible for a large aperture lens, or mirror, to receive parallel rays of light, converge them, then diverge them into a smaller beam of parallel rays as they exited the optical device? If so, directing this greater flux density into a telescope matching the...

(\overline a \overline b \overline c)+(a \overline b \overline c)+(\overline a \overline b d) is this reducable? I'm new to this as you may be able to tell, but I've went through this and have not found a way to reduce it, well I thought I had but then when I make a truth table the...

How can I take 12 vt dc @25 amps and reduce it to say .. 1 vt dc by raising the amperage and what would the amps be.

I am writing this on the curiosity of the results of a theoretical experiment. Imagine a photon moving thorugh space. It is moving freely through three dimentions and time. Using the Lorentz contraction we can only know approximately where it will be in 3 dimentions for a given time and speed...

Hi, I am having trouble understanding this question, I have looked over a few examples, but I'm still confused about the process. A)Use the reduction formula to show that: \int sin^2xdx = \frac {x}{2} - \frac{sin2x}{4} + C any help would be appreciated

At this moment, I'm on balancing redox equations. I'm stuck on step one though...:redface: 1. Assign oxidation numbers to all atoms in the equation... S + HNO3 --> SO2 + NO + H2O This particular problem is an example in my Chem book so I already know the answers. I just don't...

i have a module with microprocessor of 1.15volt sense level. when the potential is above this value it registers high and below it registers low. however the potential from the source varies from 1.3volts to 4.8volts only.nothing less than 1.15volts so all registers are high. anybody can help...

hello. can u help me with this planing execise manufacturers of sheet metal use rollers to produce the sheets. The sheets then pass along processing lines for painting. Transverse vibrations of these sheets results in a non uniform thickness of paint layers on the sheets. Electronmagnetic...

1) The strongest reducing agent from those listed is: Use your book. a. Fe+3 b. Fe+2 c. Al+3 d. Al After looking at the chart of reduction potentials in my book, is it Al? 2) Select the reagent that will transform Fe+3 to Fe+2. a. H2 b. O2...

i keep getting nonzero off diagonal elements when i try to reduce to simple sum of squares, of the equation 2 x_{1}^{2}+2x_{2}^{2}+x_{3}^{2}+2x_{1}x_{3}+2x_{2}x_{3} what i have is \left(\begin{array}{ccc} x_{1} & x_{2} & x_{3} \end{array}\right) \left(\begin{array}{ccc} 2 & 1 & 0 \cr 1 &...

Directions: Find all the values of x such that the given series would converge. http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/fd/74dc1166ac21d3f59ee568a71eb55a1.png Here is my work: http://img203.imageshack.us/img203/9559/lastscan3jv.jpg I got it wrong but is it because i...

Chemistry Reduction Reaction Help Needed: MnO4- + S2- --> MnO2 + S8 I was wondering if I had done this reduction reaction equation correctly: MnO_4^-+S^{2-}\xrightarrow{}MnO_2+S_8 After going through the reduction reaction problem solving process (I think) I get this equation as the final...

I wrote this in September so that I could do matrix row reduction on my TI-89. It works, usually, but sometimes it doesn't row reduce all the way. Any ideas what I've done wrong? Or is it just some strange quirk of the calculator? If you don't know TI-89 code, it is self explanatory except...

Hi all! I am going to design a double reduction speed reducer. using spur gears. There are a few basic layout that I can choose. And which layout would be the best? Below is my consideration: All the design have the same number of bearings, so I think that the efficiency of the bearing...

Endnote 30.37 of Penrose's book The Road to Reality briefly outlines what Penrose calls "a more rigous justification" for his graviationally induced state reduction. The endnote concludes with "Details of this argument will be published later." Penrose also alludes to this argument in a...

Please don't say just practice. Any specific tips? In my class we're not allowed to use calculators, consequently I am spending all my time row reducing to find basis, dependence, etc. Frankly, I am just horrible at it, I just can't see how to get to the end. I am a bit perplexed on the...

Hi, say I have a second order ODE a_1 \left( x \right)\frac{{d^2 y}}{{dx}} + a_2 \left( x \right)\frac{{dy}}{{dx}} + a_3 \left( x \right)y = f\left( x \right) and I have y_H = h\left( x \right) which satisfies the DE for case of f(x) = 0. Can I always, in principle, find the general solution to...

One of the Earth's resources is oil (and other fossil fuels.) Prices are going up! Up and up and up! We are consistently over 60 dollars a barrel now, electric costs are rising as a result, and so is paying at the pump. How do we stretch out resources to ease the strain on our pocketbook...

Here is one more I am having a problem with: 4x^2y'' + 4xy' + (4x^2 - 1)y = 0, x > 0 one solution is y1(x) = sin(x)* x-1/2 but when I try to work it all out with another linearly indep. solution y2(x) = u(x) sin(x) * x-1/2 the order does not reduce and the y'' is huge... so I...

Use guass jordan reduction 4x+y-3z=11 2x-3y+2z=9 x+y+z=-3 Please show all row operations.

Hi, Please could someone explain why it is that the cross section of water emerging from a tap decreases with tap distance ... is it due to air resistance acting to form some kind of aerodynamic shape? any thoughts would be much appreciated!

Can anybody direct me to a discussion on the effects of a sudden reduction of the Earth's gravity - say by 50%? Purely speculative, of course. I'm assuming its orbit around the sun would be essentially unchanged, but that the moon would recede or maybe head off on its own merry way. Any other...

We call reactions in which one species experiences both oxidation and reduction Disproportionation - but why do we chose this particular name? Thanks. :smile:

Logic Systems Boolean Reduction Question! Ok i received an assignment due on monday and have to idea how to get started...i am supposed to design a traffic light using the following criteria: a) The east west (E-W) traffic light will be green whenever both lanes C and D are occupied. b) The...

Digital Electronics Boolean Reduction! Help Please Ok i need to figure out how to reduce this I've been working on it for 2 days straight and can't figure it out...please help...its due tommorow :rolleyes: :cry: (ab)(\overline c + \overline d)+(a+b)(\overline c \overline d)

What type of bumper, made only of one sheet of paper and masking tape, would be most effective in a collision between a wooden block and a 1 kg cart? I have experiment with several designs including cylinders, spring-like compression bumpers and square pyramids, but none seem to work very well...

In the very first pages of "Quantum Mechanics" by Landau & Lifchitz, the measurement process is described as an interaction between a quantum system and a "classical" system. I like this interpretation since any further evolution of the quantum system is anyway entangled with the "classical"...

Okay, if... The Earth's gravity was 1/6 of what it normally is, then would I be correct to assume that objects being thrown up with the same velocity will stay in the air 6 times as long? If not, what's the relationship? Thanks.

I'm trying to find an integration reduction formula for the following equation: {{I}_n}=\int _{0}^{2}{{\big(4-{x^2}\big)}^n}\delta x Any indication on how to begin would be much appreciated as I've tried many different approaches but all have ended in failure. Thanks

I am a kinetic sculptor in need of some gear reduction help. I have a 2250 rpm .5 hp electric motor. i need to reduce the rpms to less than 5. the gear drive will turn a 30" plywood wheel, and it must turn slowly. the electric motor is the only one I have, so i must use it. I have a small...

Although on the whole my Boyce & DiPrima book is fairly good in of itself and compared with others, but of-coarse some areas are lacking. vt'' - 3v' = 0 I suppose I integrate twice, but then what?

I can't seem to properly solve this problem: ty" - (1+t) y' + y= t^2 e^(2t) , t> 0; ysub1= 1+t any help would be appreciated

I am in the process of writing a report on the Physics of Jet engines and I have come across a problem I cannot comprehend. In the exhaust of many jet engines they allow the atmospheric air to mix with the air from the engine to reduce exhaust noise. From what I understand this allows the...

Can anyone help me with this. I am asked to solve the following matrix with Row Red. Algorithm, [ a 3 (1+a) | -a ] [ 1 a 3 | -2a] [ 1 1 1 | 0 ] I get to something like [ 1 1 1 | 0 ] [ 0 a-1 2 | -2a] [ 0 3-a 1 | -a] but what do I do now?

Hello, I was curious if anyone could explain to me the simple procedure/guidleines to carrying out oxidation (half-reactions), reduction (half-reactions) and overall net reactions. I've read my Chem book over and over, but I don't quite understand it. Even a pointer to a good site with a...

If a vehicle could continuously cool the air in front of it and heat the air behind it, the air in front should contract and the air behind expand, reducing the pressure in front of the vehilce and increasing it behind the vehicle. This should pull the vehicle into the cooler air at the front...