Identification Definition and 87 Threads

Hi Could somebody please tell me what this is? It stands about 1/3 M high, has a spout just above the larger bottom section and the lid with a chimney in comes off to reveal a narrower copper cylinder inside. Is it Hope's? Thanks in advance Caroline

A number of people have said they are interested in this topic. Please posts any pictures, information or questions about rocks or fossils here. I'll start off with some odd formations in rock here from the Pennsylvanian period (318.1 to 299.0 mya). They appear to be strips of wood, but...

This is the kind of stuff that makes my blood boil. http://www.foxnews.com/politics/2012/08/08/treasury-inspector-general-says-changes-are-needed-to-detect-fraud/?test=latestnews Summary: FWIW, ITIN is Individual Tax Identification Number 154 Mailing address used for 1,000 or more ITIN...

Hello, I am an undergrad in my senior year at a small liberal arts college. This summer, I have been given the task of assessing our physics labs. Specifically, we have a lot of old equipment that the professors don't know much about, and they would like me to find out if it works anymore...

Hello, I have to find the transfer function of a given model (matlab). My task is to determine this function, by means of a step response of the system. I have to use graphical methods tot get the parameters, the proces itself is a high order proces with non minimum phase...

I need to know about converge series.For example how to identify a converge series.Plz explain.

Hello guys, i am trying to identify the following non linear parameter varying system. \begin{equation} Y_1(t_{i})}=\frac{Y_1(t_{i-1})+\Delta t.k_{1}.Y_2(t_{i-1})}{\left(1+\Delta.t.\left(k_{1}.Y_2(t_{i-1})+k_{2}.Y_3(t_{i-1})\right)\right)} \end{equation} \begin{equation}...

Hello everybody I started recently working on an engineering problem that requires as a first step, the identification of the system. I already have a model which is a set of differential and algerbraic equations. Unfortunatelly, the system is a parameter varying one, and the aime is to...

Hey guys, I have no idea what in the world this part is. I Ohmed it out and it is about 60 ohms. I measured capacitance and it is around 50 nF. My first thought when I saw it was that it was a capacitor. But 50 nF... I talked to our technician and he mentioned a PolySwitch. I am a little...

Hello, I'm reading Ryder's Quantum Field Theory book, and I'm reading the preliminary part where he discusses a little bit of Groups before he introduces the Dirac equation. So, as an example, he is talking about the identification between the SU(2) group and the O(3) group. Before he gets there...

Flame tests are used to test the color that a metal produces when heated and the electrons release energy when falling back to the ground state. This i understand, but why does the procedure only test the metal part of the salt? In other words, why does the anion part of the ionic compound not...

Hello, I have somewhat of a difficult question. First of all I have to say I am not an engineer. I need help in identifying this type of plastic. I am well aware that visual identification alone is almost impossible but any help would do. If possible, could one provide a supplier of this kind...

I attached the problem, how can you tell? nvm , i think it's a chamfer because the corners aren't rounded

I am curious what the wikipedia page <http://en.wikipedia.org/wiki/Pythagorean_addition> is referring to when it qoutes that symbol " a Little X in a Circle ", It says and I qoute the binary operation a "that symbol" b = sqrt(a^2 + b^2), Pythagoreans Hypotenuse. Much abliged.

I would like for you to suggest possible criteria for determining if someone is a nerd, dork, or geek. Those can be three different things. Here are some thoughts I had a few days ago: "I decide to go on Physics Forums instead of playing Halo. That proves I'm a nerd." (Halo's awesome by the...

Homework Statement I can't seem to figure out whether I'm dealing with a + or - radius value. Anyways here's the question: An object 5.0 cm tall produces an image that is 7.0 cm behind the mirror. If the radius of the curvature of this mirror is 10.0 cm, what is the magnification of the...

Is this a cone after Identifaction? Let A = (I × I)/J where J = (I × {1}) ∪ ({0; 1} × I) ⊂ I × I

I am a high school physics teacher and was thinking of demonstrating to students how frequencies of complex waveforms such as notes of instruments can be identified using a Fourier transform. I haven't done Fourier transforms for a while and was quickly re-reading about them earlier this...

Hello everyone.. I have got an assignment for biology.. I've done Task 1,2 but i need help with Task 3.. and it says.. [SIZE="4"]Task 3 carry out research using different sources. Explain how the characteristics you used to produce your identification key differ from those which are...

Hello: Can anyone please tell me how do they identify the particles in the detectors?+, for instance, how do you know if an electron is an electron and not a muon or some other negative charged particle in a detector (without using magnetic fields)?

We were walking down a Brooklyn sidewalk the other day under several trees when we spotted this insect lying motionless (except when the wind blew, it moved its legs a little to rotate itself). We didn't get too close, as it looked like it could give a bad sting. It has two pairs of long veined...

I am prepare for a practical experiment, this is a practical experiment aim to identify the anions and cations in the solution, and those ions are choosed from Pb, Ba, Ca, Cu,Fe2, Fe3 and CO3, Cl, PO, SO, NO3. where can i find the solubility in water for any ionic compound that can be formed...

Hi There Everyone I am studying undergraduate calculus in first year. My question regards the rules for identifying a limit sum as a Riemann sum and therefore a definite integral. The book we are using says that when choosing \inline \large c_{i} for some f(x) , if \inline \large x_{i -...

(1) How do you identify Ground roll on a shot record? Is it just the polarized nature of the ground roll that leads to its recognition on a shot record? (2) What is the importance of the Fresnel zone? and What does it depend on?

As part of the exploration of one of the moons of Jupiter, a probe digs under the surface, where it finds a pocket of gas. It starts to do some on-board experimentation. The data stored in the probe's computer include the following table of Mulliken electronegativity values of gases. Element...

I've been studying the Sidoarjo mudflow / Java mud volcano / Lapindo mudflow / Lusi pretty thoroughly in recent weeks. One of the key issues behind the disaster and relief effort seems to be a question of blame- if the event is natural the money for the relief effort must come from the...

Hi, I carried out a couple of experiments with unknown group 2 salts; X and Y I added dilute NaOH to each of the salts which were now mixed with 1cm^3 of water; Y formed a precipitate (initially the solution was colourless as the solute had dissolved) whilst X turned colourless (X's...

What is the space resulting from the identification (x,y) ~ (x+2piR, y+2piR)? How is it different from the space resulting from (x,y) ~ (x+2piR, y) (x,y) ~ (x, y+2piR), which is a two-dimensional torus (a donut)

Homework Statement I saw a division in a rock identification chart given to me by a lecturer.It says, Rock made of particle or crystals.I was wondering wat is different in both of these two and how to distinguish between them and identify them Homework Equations The Attempt at a...

Homework Statement Solve for X Homework Equations 2sin^2x - cosX - 1 = 0 The Attempt at a Solution I have gone in this order I turned 2sin^2x into 1 - cos2x so 1 - cos2x - cosx -1 = 0 This turns into Cos2x + cosx = 0 I don't know what to do next... could...

Homework Statement Identify the surface given by the equation 4x^2 +4y^2 −8y −z^2 = 0. Homework Equations x^2/c^2 + y^2/c^2 - z^2/c^2 = 1 (textbook definition for hyperboloid of one sheet. The Attempt at a Solution I know just by looking at the textbook formula what surface...

The way I understand it, genes are rather sparse within a strand of DNA. The human genome, for example, has a few thousand genes in a strand of 3.5 million A,C,G,T bases. I also understand that genes code for proteins through RNA but, again, most of the DNA is noncoding. My question is, how...

Raman spectroscopy is "Single molecule identification" Hi , I heard that the speciality of Raman spectroscopy is "Single molecule identification", it'd be really great if somebody can tell me HOW! because its surely going to be a question in my exam! Thanks in advance.

Can you identify any of these Sisters of the Hood ?

I saw a star just yesterday night about southwest in the sky, and when viewed through my telescope it was flashing red and blue.It was no plane for it was there all night.Is this caused by the atmosphere?If not what is it?

I was wondering if someone could please help me with my lab. We are synthesizing NMR shift reagents in order to determine what isomers are present in a mixture of xylenes. I have the NMR and I can't figure out how to determine which isomers are present. If I have the NMR of o,m,p-xylene by...

I just got my learners permit today at the DMV, and brought a photocopy of my birth certificate as a form of identification. They did not accept it and said I needed an original document with the state seal stamped on it to proove that the document is real, so my dad and I had to go to the town...