What is Base: Definition and 585 Discussions

Homework Statement I'm probably incredibly rusty, but I can't seem to solve this. I've been given the space V = C[-\pi,\pi] (continous functions on the closed segment) with the next linear transformation: T(f(x)) = g(x) = \int_{-\pi}^{\pi}[1+cos(x-t)]f(t)dt I ought to prove that T(V), the...

What is the BJT base current if the base is connected to a zener diode like in the circuit here - http://www.satcure-focus.com/tutor/page5.htm With a voltage divider it's thevenin's equivalent. But with zener, should I consider it as a voltage source?

greetings, what are the differences between base,emitter and collector? thanks.

I am studying the influence of a gyroscopic effect of wheels/tyres on a steering system in a car. I can't seem to get my head around few concepts. It boils down to a simple problem. Consider a free spinning gyroscope wheel with horizontally aligned axis. This axis is mounted in a vertical...

I am trying to solve the following problem. It is not homework since I am just brushing up =) but I will try posting it here. I have the following base 14 subtraction problem: 35 - AB = ? I can look up the answer, which is shown as 68 (base 14). But, for the life of my, I can...

When you throw in LiAlH4 with a carboxylic acid, you always see the reaction being written out as the Hydride ion attacking the carbonyl function. But why can't it just de-protonate the OH? Also, can't LAH also deprotonate alpha carbons of carbonyl functions that are pretty acidic? Why...

if an object is at the base of a beaker does it feel upthurst even though there is no liquid below it

Im looking for a method of evaluating large logs without the use of a calculator, such as, log102750. Using properties of logs i can reduce the problem to 750*10y=2. However this requires an estimate on the value y which is going to incure a significant error in my final result. Im...

Hi, I came across a problem, which I might have solved a few years ago when I had studied Chemistry, but now I am totally stumped. Would appreciate some quick solutions. I have 25 ml of 0.1 M NaOH, and a volume of 0.1 M of Ethanoic Acid. What volume of ethanoic acid would neutralize the 25...

When calculating base values for current, impedance etc do we use the line to line voltage or the phase voltage? What's the reason for using one over the other?

Homework Statement In order to achieve a high result in this chemistry assignment, I need to have demonstrated a knowledge of challenging content not discussed in class. Every other part of this assignment I've covered (Intro, method, discussion etc), I am just stuck with the calculations...

If in a given DNA molecule a C-G base pair is changed to a U-G base pair the following mutational change in the DNA will result a. C-G to G-C b. C-G to T-A c. C-G to A-T d. C-G to A-U Can someone elaborate on this for me?

When the NPN is in the forward active mode The base emitter junction is forward biased and the base collector junction is reverse biased. But isn't it possible for the base collector junction to break down? Or do we assume it never breaks down? Also does anyone know any good water analogies...

I'm trying to write a simple program to calculate the impedance of an AC circuit consisting of an arbitrary number of resistors, capacitors and inductors combined in series or parallel. First I ask the user to create the components they wish to use in the circuit, and this is where I hit the...

How could I construct a pseudo-base Pi? To represent any real interger? So far I've done Base (22/7) (fractional base), but i was thinking something like Base 180 (then do some stuff with degrees and radians)... Any ideas?

I am confused as to exactly what a local base at zero (l.b.z.) tells us about a topology. The definition given in Rudin is the following: "An l.b.z. is a collection G of open sets containing zero such that if O is any open set containing zero, there is an element of G contained in O". Ok, great...

just wondering, what is the difference between Base-Emitter Saturation Voltage and Base-Emitter on Voltage ? VBE (sat) = 0.5V VBE (on) = 0.7V

Homework Statement I want to create a structure that will hold information about the below environment,a knowledge base.So I'm trying to define predicates to encode every state of the problem; some of them will be atemporal predicates, which don't change as time progresses, and some will be...

the rules are simple. i ask questions, the first to answer correctly gets a point. first to ten points wins. first question. convert 5968 in base twelve to base 10

Homework Statement Assuming stomach acid is 0.1 M HCl(aq), what volume of stomach acid can be neutralized by one antacid tablet? We have the titration curve we got with .5M HCl titrating a tablet dissolved in 100ml distilled water Homework Equations ? The Attempt at a Solution ?

In a test that was held many weeks ago.. We were asked whether concentration will affect the strength. The answer given by the teacher is yes.. As based on the concept of pOH... But i strongly disagree and i had a debate with my lecturer. . I said it should be based on Kb or percentage...

SO I had this discussion with a friend, and I thought that the Romans had a base7 system, as they have only 7 numerical symbols. And the Greeks have 27, so base27 Now this is incorrect, but I'm not sure why. Can anyone explain?

Homework Statement If .0200L of .100M nitrous acid is titrated using .200M NaOH solution, what will the pH be at equivalence? Homework Equations The Attempt at a Solution I figured out that the volume of NaOH at equivalence is .01L, however I do not know what to do after that...

Presently, I am working with the "Lunar Habitats" and planning to present all the knowledge I've gathered in an Institute so that some one would probably ignite the fires for building structures on the Lunar surface o:) The thing is ... the date is approaching but I am unable to find material...

Dear All, I have got a subclass (Panda), which inherits a Print function from the base class (Bear). I'd like to be able to call the base class's function from the subclass. But my complier gives me the following error message: In member function `virtual void Panda::print(char)'...

Homework Statement A steel chimney is 28 m high, 1.4 m external diameter, and 20 mm thick. It is rigidly fixed at the base and is acted upon by a horizontal wind pressure of intensity 1.1 kN/m2 on the projected area. 2 The chimney weighs 74 kN per metre of height. Calculate the maximum stress...

Such an equilibrium problem involves 3 equilibria: a weak acid, a weak base, and water autoionization. I find in various texts that several assumptions are made in dealing with this class of equilibria problems (ignore water's autoionization, conversion of the weak acid is on the order of...

Homework Statement 0.5332 M CH3COOH 0.1219 M CH3COONa 0.100 M H2S 0.41452 M NaOH what is the pH of the resulting solution? Homework Equations CH3COOH Ka=1.75E-5 H2S Ka1=9.6E-8, Ka2=1.3e-14 The Attempt at a Solution I know that neutralisation will occur, but there is not...

i need to mark all the Base and Acid in the Equation (in the picture) and tell why i think i choose Them to be acid and base i mark the Acid in red line and the Base in blue line, tell me if i Right. my Explanation is HNO is Acid and it give proton While CH3NH2 is base and it gain in the...

Homework Statement This is a two part problem: a) A reservoir behind a dam is 56 m deep. What is the gauge pressure at the base of the dam? The acceleration of gravity is 9.8 m/s 2 and atmospheric pressure is 10100 Pa . Answer in units of kPa. b) What is the gauge pressure 19 m from...

I missed this question on an exam and I was wondering if anyone can explain to me how to do it.Homework Statement The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.300 moles of NaC2H3O2 in enough water to make 2 Liters of...

I want to start making my own LED lighting but need to find a small footprint, hopefully pre-made circuit that fits within a E27 Base Cap. I have just searched (almost) everywhere and have decided to just ASK. It needs to be about the size of the tip of a mans thumb to fit in the E27.

Homework Statement To build a triangular pile consisting of 120 balls, the number of balls in the base would have to be?? Multiple Choice a. 24 b. 30 c. 36 d. 45 Homework Equations The Attempt at a Solution The answer is 36. How do I get this answer and is...

Who can explain what happens (in terms of electrons) what happens when base current is zero, especially why current flowing to collector is zero under this condition?

hi all can someone explain me the units of Base oil viscosity of grease? for example is there a difference between grease rated at 200cSt and 200 mm2/s if so then what is the meaning of cSt and what does it stand for? thanks

According to the Brønsted-Lowry definition, a base is a compound that can -keyword- accept H+, and an acid anything that can give H+.

The acid: Hydrochloric What happens step by step? I am unfamiliar with acids and bases, so I just want to know what's happening to help figure out. Thanks.

Could you provide a link to a 'number system with an irrational base'? I only found this link http://www.jstor.org/pss/3029218 The link shows a small part of this number system ... I would to know more about it.

x^2*log(2)x=256^2 (2) refers to base 2 Is ther any rule to solve for x.

I have been told that if we have two operators, A and B, such that AB = BA then this is equivalent with that A and B have a common base of eigenfunctions. However, the proof given was made under the assumption that the operators had a non-degenerate spectrum. Now I understand that one rather...

Lets say you titrate a weak acid, HA, with a strong base, NaOH. Now, before the equivalence point, the pH is calculated like a buffer because HA + OH- -> A- + H2O. So you have a mixture of a an acid and its conjugate base. My question is, why doesn't this act like a neutralization reaction...

Finding the volume of a cone with a elliptic base! Homework Statement The area of an ellipse is (pi)ab, where a and b are the lengths of the semimajor and semiminor axes. Compute the volume of a cone of height h = 20 whose base is an ellipse with semimajor and semiminor axes a = 4 and b = 6...

Homework Statement Convert 33.9 to binary. Homework Equations Division by two and remainders The Attempt at a Solution I'm unsure since it is .9. Using the dividing by two method with the remainders wouldn't account for that. Could I do something like this? 33.9 = 339 *10^-1...

.. just a question that came up in a convo between some friends of mine.. What (if anything) would change or be different if we used a different numbering system. Would using a system based on 12 (or whatever) maybe yield different results when calculating large physics problems? (like black...

Homework Statement I would like to solve the following equation for the variable "n" The variable c represents any integer constant. (n/2)^n = c The goal is to get this in some form of n = ? Homework Equations The logarithm properties. The Attempt at a Solution I've tried...

Homework Statement 1.5000 g of diprotic weak acid H2A was dissolved in 100.00 mL volumetric flask. 25.00 mL aliqouts of this solution was titrated with a monoprotic strong base NaOH (0.08000 M). The titre volume of NaOH was 40.00 mL. Calculate the molecular weight of H2A. Homework...

Sorry for this silly question , I am still high school student . I know that temperature is base on the average kinetic motion of all atoms. But kinetic motion is not absolute so in what case should we use this formula: v= \sqrt{\frac{3RT}{\mu}} . Should it be the velocity in respect to the...

Homework Statement The solution of the quadratic equation x2 - 11x + 22 = 0 are x = 3 or x = 6. What is the base of the numbers? Homework Equations Knowledge of how to convert from a generic base to decimal? The Attempt at a Solution I tried to just place r in where I would...

Homework Statement Convert the following as full (decimal) numbers with standard (base) SI units: 86.6 m The Attempt at a Solution I thought I could just change it to 8.66x10^1 then just add the 10^-3 because of the milli to make it 8.66x10^-2. But I'm wrong so could someone help me?

Homework Statement In my textbook, they don't necessarily explain what happens when we add a base to a weak acid (e.g. acetic acid)...so I was wondering if anyone can tell me if I got it down: -Like if we have acetic acid (which is a weak base) in water, it will form an equilibrium and...