Determination Definition and 194 Threads

Homework Statement A quantity of water in a beaker of negligible thermal capacity is cooled to a few degrees below freezing point. The beaker is then placed in a warm room, and the times recorded at which it is at various temperatures as it gradually warms. The observations were...

Hi! I got the task to determine the moment of inertia of a hollow cylinder, however it's not about just measuring the mass and the inner and outer radius and putting it into the right formula, instead I should roll it down an inclined plane. 1. Homework Statement I'm only allowed to use the...

So, here's the set-up: A small stereo speaker is connected to a function generator. A concave lens, bearing a ball is place over the speaker. Now, the frequency is slowly increased in the function generator. My question is, Will the ball really bounce at a certain frequency? Because I am not...

Does anyone know a reference with a discussion on the experimental determination of the metric tensor of spacetime? I only know the one in "The theory of relativity" by Møller, pages 237-240. https://archive.org/details/theoryofrelativi029229mbp

Which cell makes you ‘you’(different from any other individuals of the same sex)somatic or sex cells?I think somatic cells.Because if i am right all somatic cells are same ,so it can be determinant for making an individual but sex cells (I don’t know about egg cell but as i have studied about...

I know little about the experimental measurements of heat capacity. I can see you'd need to know both how much energy you've transferred to a nanoparticle, and measure the temperature change resulting to ascertain it. This brings me to my questions: How effective is laser heating of...

I have for class a research design of Nurse Practitioners, who have had clinical experience of 2 years or more with those, who have less than 1 year to determine if there is a difference in patient outcomes with those, who have diabetes and those, who have hypertension. IF I use an alpha level...

After specifying the primitive vectors of a structure namely (a,b,c) in Wien2k, one has to specify locations of atoms in unit cell.There are three components X,Y,Z which determine the atom location. I want to know whether "X,Y,Z components" are corresponding to vectors a,b,c or they are...

So I'm coding up some initial orbit determination stuff in MATLAB (for personal education; I love this stuff), and I am using 'Methods of Orbit Determination' by Escobal as a guide. I already got Vallado's code to work, now I'm just comparing other methods. I'm having an issue with one of his...

A first stage of the determination. We have a body of length L = AB, which moves along the x-axis with velocity v, say that coming to us. A -------- B v <--- | | h - vertical distance | ./ - a light converges to us with the speed eq. c | / O ---------> x At some time t = 0, we see the point A...

Hello, I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example, 800 keV peak, 1000 keV peak and 1200 keV. I have an information about the peak area changing with time. Namely, I know the peak area in different times. So I can calculate the...

How could I find the lim as n-> infinity of the expression I attached? The only way I could find was to express it in terms of a definite integral. Integral of xe^(-2x) from 0 to 1. What is the other way?

I have to say if each reactant is first, second or zeroth order. Now, I know that usually, we have plots of ln([]) over time. But my teacher wants to trick me. Here is how I do this: Take two data points: convert them to [ ] and normal rate (remove the ln() function). Compare the two...

Determination of density at a depth in a compressible liquid. Hi all, Let us consider a tank containing some compressible liquid with bulk modulus K and having density at its surface s. Consider some part of liquid with volume V, a depth h below the surface. Due to liquid above it there...

Homework Statement Can you conclude that A = B if we know that (a) A \cup C = B \cup C (b) A \cap C = B \cap C (c) A \cup C = B \cup C and A \cap C = B \cap C Homework Equations The Attempt at a Solution A=B in all three cases, but I can't find a rigorous proof for any of these cases...

Homework Statement I've been trying to find out what is the period os this kind of pendulum decribed here: http://www.eng.uah.edu/~wallace/mae364/doc/Labs/mominert.pdf The thing is, I've came to the same result shown in equation (11) but my reasoning it's different. I would even say that...

Hi guys! I have assignments and we are trying to get to reasonable value for more than 2 days and still nothing... Okay.. problem is: https://imagizer.imageshack.us/v2/705x238q90/191/6qqd.png picture of the plate: https://imagizer.imageshack.us/v2/412x395q90/835/7u81.png F =...

Homework Statement If z = east and y = south, then x = ______? Select one: a. east b. up c. south d. north e. down Homework Equations The Attempt at a Solution using the right hand rule the answer i got is south is this correct?

Hello, I have been measuring quantum yields in the lab for quite some time and have occasionally been running into some difficulty with my fluorescence spectra. The intensity (CPS) of the spectra for the same molecule will remain the same under the same conditions most of the time; then, every...

Dear Fellow Members, If we have been given an unknown compound.We even don't know that it is organic or inorganic. Is there any chemical test to determine that the compound is organic or inorganic.. Please Help me out. Thanks...

Homework Statement In uranium (Z=92) the K absorption edge is 0.107 Å and the Kα line is 0.126 Å. Determine the wavelength of the L absorption edge. Homework Equations K-edge: EK= (Z-1)2*13.6 L-edge: EL= (Z-σL)2*13.6*1/4 what is σ and how was calculated. Characteristic X-rays: Ex = h*ν=...

I have been given a fundamental equation of a system as u = \frac{s^4}{v^2} After writing down the 3 equations of state, namely: T = 4\frac{S^3}{VN} P = \frac{1}{2}\frac{S^4}{V^{3}N} \mu = -\frac{S^4}{VN^{2}} I need to determine the equation of isentropic (dS = 0) processes on the P-V...

Homework Statement 7.39 mmol of base was used when titrating 432 mg of a monoamine monocarboxylic amino acid from pH 0.8 to 12.0. What is the name of the amino acid? Homework Equations None I suppose. Henderson-Hasselbalch perhaps, but I don't see how that helps me The Attempt at...

Theorem in electromagnetism says if the divergence \nabla\cdot E and the curl \nabla\times E are known, then E is uniquely determined. So my question is, the divergence equation gives 1 constraint and the curl equation gives 3 constraints, which add up to 4 constraints. On the other hand, the...

I wasn't sure where to post this question, so I posted it here. As the title suggests, I want to know how to calculate (at least roughly) the electric field induced by excitation and ionization of a material (such as a metal) using a high intensity laser. My final goal is to compare the...

Dear all, Please tell me the steps are used to find Modal loss factor of composite constrained layer damped beam by using Finite Element software such as ANSYS etc.

https://www.khanacademy.org/math/probability/regression/regression-correlation/v/r-squared-or-coefficient-of-determination Homework Statement So, when determining how effectively a best-fit line describes the variance of a given set of measured data, the Coefficient of Determination is the...

Homework Statement Reference the Cu-Zr phase diagram. If you make the alloy CuZr and heat it to 300°C, what percentage of the material will be Cu10Zr7 and what percentage of the material will be CuZr2? Homework Equations Phase diagram attached. The Attempt at a Solution I used the lever...

how to determine (theoretical, based on physics principles of detection of different fields from molecules without outside influence) individual electromagnetic field from single molecule for example dna, rna, different proteins, carbohydrates, fats etc.

Hi, In my book it says that it is difficult to determine the lattice energy of NaCl so they use the Haber cycle which applies Hess' law. Lattice is the energy change when a solid ionic substance separates into ions in gas phase. We could simply increase tempetrature until NaCl breaks down...

Hi, The formula of caffeine is C8H10N4O2. The oxidation numbers of O & H are -2 & +1 according to the book. How do I determine the oxidation numbers of C or N. Note: The substance is a molecular substance so we cannot apply the following rule: "the oxidation number of an atom in a monatomic...

Hi there. I have found the surface tension for liquid etanol on a given problem. Then the problem says: supposing that the coordination number for etanol is 12, what value does the intermolecular interaction energy has? I have ##\gamma=21,26355\frac{dyna}{cm}##, gamma is the surface tension that...

Hi everyone! So, something sort of weird happened in analytical lab and I was wanting some guidance. I was trying to determine the ethanol concentration in a 4 Loko, a red wine, and a beer through acid/base titration. I pipetted a little bit of a diluted alcohol sample into a small beaker and...

The light curve of a type Ia supernova in a cosmologically remote galaxy requires two particular corrections. The time axis must be corrected for time dilation, and the apparent-magnitude axis must be corrected for redshift dimming. It is my understanding that the "distance" determined...

Question Source : Elements of Engineering Electromagnetics 6th edition by Rao. Page 202 problem3.30 Problem: Three sinusoidally time-varying polarized vector fields are given at a point by F1 = 3^(1/2) * ax * cos(wt +30) F2 = az * cos(wt+30) F3 = [ 0.5ax + 3^(1/2)ay + 0.5*3^(1/2)az ] *...

Given two 2D unit vectors (A and B) in different directions and positions in the same horizontal plane, is it possible to determine the origin (point of rotation) required to make vector B = vector A (same position and direction)? All this assuming that vector B is a rotated (only) version of...

HAllo everyone, I had a problem with the measurement of young modulus and shear modulus with ultrasonic measurements( pulse-echo overlap technique) For my metallic glasses rods (amorphous material) I used these formula for the calculation: 1. determination Shear modulus: G= ro * v...

Mass dilation would of course be the relativistic mass (a term which really shouldn't be used.) It seems none of the books or websites I have researched have explained this to my satisfaction, so I began thinking about this, and here is my derivation. NOTE: IRF = Inertial Reference Frame...

It's given in my book that from the width of spectral lines you can determine whether or not it is a main sequence star... Not sure if astro-como or quantum.. Anyway, i need a detailed easy explanation of what is the width of spectral lines.. Secondly, if we know that how will we determine...

It is said in the literature, I believe, one needs several nights of observations to calculate an orbit for, say,an asteroid. Using celestial mechanics mathematics and methodology, one produces the six orbital elements. It seems to me that most introductory texts on the subject, talk about...

Hello, if I was using an 800Mhz carrier which was modulated with the range of frequencies 200Hz-3.3khz, what would be the total bandwidth ? Would it be 3.1Khz * 2 = 6.2kHz or would it be 6.6kHz ? Thanks for any help.

So, we're trying to simulate an electric car running with a DC-engine. To get the calculations right we must determine the rolling resistance coefficient and airdrag coefficient. (We've already determined the rolling resistance to about 0.014, doing some linear calculations at low speeds <...

Is it possible these days to directly determine the chirality of your molecule without the need of a chiral auxiliary? http://www.sciencedirect.com/science/article/pii/S0301010405004970 This would be extremely useful if this technology ever came to fruition. Can anyone explain how this...

I’ve been struggling with this for quite some time and will be grateful if someone can help me. I have got the data for some tension and torsion tests performed on standard specimen- the tests were done by someone else- not me. I’m trying to do a material modelling based on the tests...

This equation is for calculating what and how was it obtained. E=6(mg/bt3)Rs

As you know,astronomers calculate the velocity of distant stars by measuring their light's redshift.This suggests that they have a way to know each star's light's wavelength in a different way from observing its light.What is that way? thanks

Homework Statement How to determine the integral bounds of phi in spherical polar coordinates. Please see my exact question at the end of page 2 of 2 in attachments. Homework Equations Please see my attachments The Attempt at a Solution Please see my attachments.

Homework Statement You and a friend decide to determine the radius of the Earth. You synchronize watches; then your friend drives 50km due west, at latitude 40°. Each of you determines the time when the Sun lies due south -- on the meridian Your friend observes the Sun to be on her meridian...

Need help, Activation energy determination from this reaction. Is this possible?? i did an experiment, i noted the tempreture and found rate constant. My friend did the same experiment and she found rate constant and noted the tempreture.. The tempreture differs by one degree. Can i calculate...

Hi, I am trying to solve the following equation: \Psi(r,t) = \sum_n C_n(t) e^{-i E_n t} \psi(r) to find the C_n(t)s. The system I am modeling is benzene. I can, by Hückel's method, determine the time-independent solution. The apparently obvious transition from time-independent...