Determination Definition and 194 Threads

Hi all. I'm looking for a paper that I've seen referenced in a couple of articles I've been reading. The paper is O. M. Kiselev, Determination of gas-bubble shape in axisymmetric flow of fluid, Zh. Prikl. Mekhan. Tekh. Fiz., No. 3 (1963). The English name of the journal is Journal of...

You are the Chief Engineer for a prominent hydraulics consulting company. Your client wants to pay you lots of money to design a system to deliver 1 m3/s from reservoir A at elevation 300 m to reservoir B at 500 m. The distance from A to B is 1000 km and the elevation between the two reservoirs...

A transformer is rated at 2300/230 V, 15 kVA and 50 Hz. Assume that the transformer is operating at 80% p.f., leading and at rated output the secondary terminal voltage is 230 V. The following parameters for the transformer are given: N1 = 1500 turns N2 = 150 turns r1 = 2.7 ohms r2 = 0.024...

"normal" determination to estimate permeability I'm working on a magnetic circuit using a cast steel rectangular core with a .0008m air gap. There is a hint the question that says, 'Use a "normal" determination to estimate μ from the graph.' What exactly is a "normal" determination...

Hi, When two particles collide in the centre of mass frame, they interact and then scatter. Am I right in thinking that the resultant scattering angles are completely arbitrary? If so is this a case of an effect with no cause? Just hoping someone can clear this up for me. Many thanks!

Homework Statement The polarization of a light wave is described by two complex parameters. \lambda = cos\Thetae^(i\deltax) \mu = sin\Thetae^(i\deltay) Satisfying |\lambda|^2 + |\mu|^2 = 1 More explicitly, the electric field is Ex(t)=Eocos\Thetacos(\omega/itex]t-\deltax)...

Situations that Require the Accurate Determination of Refractive Index

Homework Statement With a spectrometer we can see a black line in the spectrum of the sun at the angle \theta =20,73 from the maxima of 0. order. The line is in the maxima of the second order. Use the interference formula (given under heading 2) to determine the wavelength and color this...

I'm having some trouble with this one A water sample contains the following ions (all in mg/L except HCO3-) K+=70, Sr+2=20, Ca+2=180, Mg+2=80, HCO3-=230 mg/L as CaCO3-2, SO4-2=164, NO3-=37, Cl-=400, CO3-2=35, and B=?? has a valence number of 2 but the sign is unknown. TDS(Total...

Homework Statement Use the principle of mathematical induction to show that the value at each positive integer of a function defined recursively is uniquely determined. I understand the problem and its related concepts. However, I feel that my attempt at a proof doesn't use the principle...

Hi guys! I face some difficulty in finding the focal length of a microlens. Assuming that the microlens is spherical, and the medium of the surrounding is vacuum. I really need an equation to get me going for my research task. I actually found the lensmaker's equation which is /=(−)(/−/+(−)/...

The template doesn't really work well for mine considering its a lab sorry ><. I am quite confused on how to do the calculations on my chemistry lab, i have scanned, and rewritten my answers so they would be more clear :-) . the questions i have are on the 3rd and 4th image, I am just really not...

Homework Statement Approximate the sum of the series S = \sum(n from 1 to Infinity) \frac{[(-1)^(n+1)]}{n!} by calculating S_10. Estimate the level of error involved in this problem. AND S = \sum(n from 1 to Infinity) \frac{[(-1)^(n+1)]}{n^4} Approximate the sum of the series by...

What does "over determination" mean? I have come across instances of the phrase "over determination" in discussing Einstein's attempt at a unified field theory. For example: "Again and again, Einstein returned to the question of whether one could obtain the quantum of action from an...

Homework Statement I'm having trouble solving the following exercise: Given the following wave equation: y=0.01cos(wt-kx)+0.02*6^(1/2)sin(wt-kx) prove that if w=16s^-1 and k=6m^-1 then the amplitude of the wave is 0.05 meters and the initial phase is -pi/4 how can I prove that? By phasor...

I've completely forgotten how to do this/ not sure I ever really knew. I did some selection rules for in nuclear physics when you've got magnetic / electric transitions, but I don't think its the same and either way I don't remember it and am a bit lost. The J-pi states of 8Be and 4He are 0+...

Should I mention for example hiking to demonstrate my determination, or describe my experience in being a member of organizations such as AIESEC, which might demonstrate my team and leadership skills but has nothing to do with physics.

Hi, I want to proof what the distribution will be when I apply a normal distributed x to a linear function y = a*x + b. What will be the mean and the variance of y ? The expectations can be calculated than with this formula ( probably with this formula what i want can be proofed with...

We did an experiment (link provided below), where we were to determine the concentration of caffeine in Mountain Dew. We made 3 standards and measured their absorbance along with the unknown (the mountain dew sample) and we graphed these results to find the concentration of caffeine in Mountain...

Hi, I have been trying to find out about the upsilon meson (the bottom-antibottom quark pairing) for a piece of work I'm preparing. Since it has a neutral charge, I've been trying to find out how it was decided that what came to be known as the bottom quark had a charge of -1/3 rather than +2/3...

Hi just wondering if you could help, I've stumbled across an example question where the iron purity is meant to be above 80% when 8H+ + 5Fe2+ + MnO4- → 5Fe3+ + Mn2+ + 4H2O 15cm3 is titrated and concentration of potassium permanganate used is 0.02M So far I have worked out Number...

letsa say i have an ak = cos ( k*Pi/4) + sin(3*k*Pi/4), the signal is discrete time, fundamental period N=12. the way i would derive its x[n] is.. Sum(k=0, to 11 of: 0.5*exp(j*k*Pi/4) *exp(j*k*w*n) + 0.5*exp(-j*k*Pi/4) *exp(j*k*w*n) + (1/2*j)*exp(j*k*3*Pi/4) *exp(j*k*w*n) -...

Homework Statement Homework Equations The Attempt at a Solution I have no idea how to solve this. Any info would be helpful.

I have a 2 dof vibration system, I have determined the differential equation of the model, can I determine the trasfer function readily with matlab, without using manual algebra operation? In other word, I have that differential equation system: [m]x''+[c]x'+[k]x=[f] where: [m] mass matrix...

Is it possible to know the kind of alumina phase I have using EDS?

Ok so I've been wondering, how is it that physicist's EXPERIMENTALLY determine the ground state configuration of electrons in a particular atom? In other words do they use emission spectra/thermodynamic calculations/etc? Also, if ground state represents an atom's minimal energy state, which...

what i did: 27.40 * 0.781 = 21.4 52.9 * 0.811 = 42.9 62.6 * 0.856 = 53.59 there is a hint that says i have no idea how to get the common factor with those numbers.. btw i had no idea where i can post this in here so i posted here :X

In Thomson's experimental determination of the ratio m/e of the mass to the charge of an electron, in which the electrons were subjected to an electric field of intensity E and a magnetic field of intensity H, the equations m[d2x/dt2) + He(dy/dt) , m[d2y/dt2) - He(dx/dt) = 0 , were...

Hello, I have been given the following problem and am hoping for some help... You have 1000 unlabeled gas cylinders, each are 0.25m3 and need to be able to identify the contents. They mostly contain oxygen and helium, but some contain xenon and uranium hexafluoride. You are given a scale...

Homework Statement The figure attached illustrates a setup that can be used to measure the magnetic field. A rectangular coil of wire contains N turns and has a width w. The coil is attached to the one arm of a balance and is suspended between the poles of a magnet. the field is uniform...

I have estimated some transfer frequency functions of complex mechanical suspension. It is shown the gains reach a very high value at a 0.8Hz. How could i know if the 0.8Hz isthe suspension natural frequency?

In my electromagnetics textbook ("Fundamentals of Engineering Electromagnetics" by DK Cheng) there is a typical problem with capacitance, conductors and cylindrical or spherical symmetry which pops up with different variations several times in the problems section of the electrostatics chapter...

I am doing satellite attitude determination simulation using sun Earth sensors and Gyro modelling .I am using extended kalman filtering for attitude determination. the sequence of operations I am doing are % Simulation data % Spacecraft data % Gyro data % Sensor data. % Control system...

Hello, In simple linear regression (or even in multiple linear regression) how does one prove that the coefficient of determination, given by R^2 = \frac{SS_{Reg}}{SS_{Total}} = 1-\frac{SS_{Res}}{SS_{Total}}= 1-\frac{\sum_{i=1}^{n}(y_i-\hat{y}_i)^2}{\sum_{i=1}^{n}(y_i-\overline{y})^2} is...

I have some very small spherical particles with diameter of 1 mm and i would like to know coefficient of friction between them. Can anyone suggest an experiment/device that would help me? In order to get friction between a plate and particle i can use tilt test and measure the angle at which...

Hello everybody I'm trying to obtain the transfer function (Vout/Vin) of some circuits employing an E5062A Vector Network Analyzer. I've been looking for some information on the topic, but I'm quite confused. Somebody told me it can be obtained simply as S21*sqrt(Zo). Additionally, I...

Homework Statement a crown that is supposed to be pure gold has a mass of 850g. Its apparent mass when immersed in water is 798g. (a) what is the volume of the crown? (b)is it pure gold?If not, what is the percentage by volume of gold in the crown assuming that the crown is an alloy of lead and...

Happy New Year 2010 everyone, I need your help with the determination of heat rejection to coolant from engine. I need to define this in order to finalise the geometry of a suitable radiator. I have an Excel spreadsheet from my team mate about the results obtained at the lab last year. I...

Determination of a Joint pdf Hi all! Someone can help me with this problem? The duration of a certain type of bulbs has a exponential distribution with known parameter \lambda . Consider a set of n bulbs. Which is the joint pdf of the durations t_{i} of the n bulbs?

Homework Statement Hi, I am having some difficulty in this experiment in determining the spring constant. It involves measuring the height the spring figure bounces and each time adding extra weight and recording the differences in the height. I've recorded the data, plotted a graph of...

Hi, just a basic question , what are the main methods of determining the structure of a solid in order to test its genuinety i.e. gold... if i were to be given a piece of gold, how would i check that it is genuine gold? could i use x ray diffraction (If so what measurements /tests would i...

Hello guys. I was trying to determine the geographic location of the observer by measuring the elevation of two distinct stars at a certain time. Well, I am not very skilled in programming and I found this script for Octave and tried to use it. My data: Star A: Arcturus(α Boo) Right...

While GPS pseudorange is measured by the satellite and GPS local clock difference (together with some compensations for atmospheric effects), how does a GPS receiver measure the pseudorange rate? Thanks.

Hi all, I was struggling in solving this question which is a part of a practice exam, and I need you to be patient with me and teach me step by step how to figure out the structure and how to read and analyze the spectra. I attached the two 1H NMR & IR spectra so you will be able to know...

Hi, first time posting here. I'm working on satellite orbit determination and wish to add in perturbing accelearations in addition to the Earth's graviatational field. I will be adding in acceleration due to the moon, sun, atmospheric drag, etc... The acceleration due to the Earth's...

Homework Statement Determine x and y strains in order to construct a Mohr's circle of strain. A 2-gauge Wheatstone (the third/middle gauge was not working), with gauges 90-degrees apart, was attached to a specimen steel plate 15-degrees offset from the x and y axes. An axial load was applied...

Magnetic saturation seems to have a lot of influence on parameter behavior during load test on permanent split capacitor motors. Is there a method to integrate saturation in the equivalent circuit calculations . Is this possible when one uses the classical tests DC-test, Blocked rotor test, no...

If a 2.893 g sample of an unknown containing iron requires 28.45 mL of the permanganate solution described in Pre-Laboratory question 3 to reach the endpoint what is the % Fe in the unknown?

In his book 'Einstein's Universe' Nigel Calder wrote (16, BBC, 1979) - "The world's most powerful accelerator of electrons is at Stanford in California...electrons emerge...about 40,000 times 'heavier' than when they started." Have gamma factors in excess of that amount been generated...

Hello all, I am using the method below to determine the phosphate concentration of phosphate mixtures in powder form(sodium triphosphate, potassium triphosphate, sodium di and potassium diphosphate). The mixture also contains Na2O. The concentration of the mixture in P2O5 should be between 55...