Determination Definition and 194 Threads

Hello I'm trying to calculate the orbital elements of a moving body in the solar system with given three observations. I'm trying to solve this with the software "find_orb" but it seems like I should define a provisional designation in the input file. the problem I just have the dates, RA...

I am confused about the meanings of these two goodness-of-fit descriptors. If I have two independent variables and I wish to test the validity of a proposed functional relation between them (say I have measured electric potentials and currents and wish to test if the data reflects a linear...

Homework Statement Hello. I have a lab procedure that I am supposed to write, and since my teacher is on a two-week sick leave and the substitute does not know anything, I seriously need some assistance. Please note that for the following problem, a titration is NOT allowed. It must be...

Homework Statement ok so I'm trying to find the change in enthalpy for this reaction: Mg(s) + (1/2)O2--> MgO(s) I've done the lab to find the temperatures of certain reactions, these were: 9.70 Celsius for the reaction Mg(s) + 2HCl(aq)--> MgCl2(aq) + H2(l) 7.60 Celsius for the reaction...

Homework Statement I need to calculate the temperature and pressure at the triple point. natural log of pressure of the liquid/solid: lnp(solid)= 29.411-(5893.5K/T) lnp(liquid)=22.254-(3479.9K/T). The compound is uranium hexafluoride, MW= 352.02. I do not believe the actual molecule matters...

Homework Statement Determine if the following T is linear tranformation, and give the domain and range of T: T(x,y) = (x + y2, \sqrt[3]{xy} ) Homework Equations T ( u + v) = T(u) + T(v) T(ru) = rT(u) The Attempt at a Solution 1) let u = (x1, x2); T(ru ) = T(rx1, rx2)...

Homework Statement The general solution of the underdamped oscillator is given by x(t) = exp(-Bt)*[(A1)cos{(w1)t} + (A2)sin{(w1)t}] Solve for x0 = x(t=0) and v0 = v(t=0) in terms of A1 and A2. Then solve for A1 and A2 in terms of x0, v0 , and w1. Homework Equations w1 = sqrt{ (w0)^2 - B^2...

tell me how to perform this experiment and please post the figure of its apparatus.

Homework Statement The purpose of the lab is to determine the % comp of an alloy from the volume of hydrogen that is produced in the reaction. We did a lab, in which an alloy was reacted with hydrochloric acid, in a test tube with a stopper and tube leading to a 500ml sidearm flask, with a...

In his book 'Einstein's Universe' Nigel Calder wrote that relativistic mass increases in the region of 40,000 times a particle's rest mass have been determined. Is this the maximum GF attained in particle acceleration experiments? How is such a figure arrived at? I read somewhere that...

i am having problem in calculating pKa in my experiment,a formula of pKa=pH + log10 [HB]/[B] my data obtain only gotthe pH of HB,that is 5.17 how can i calculate the pKa?? [HB]=concentraion of undissociated form indicator [B] =concentration of dissociated indicator

Hi, Given a large number of test particles N, it should be possible to determine the Riemann curvature tensor by tracking their motion as they undergo geodesic deviation. Is there a minimum number N that will achieve this in any situation, or does it vary from problem to problem? How...

Hi all, I'm doing this project entitled "determining the effects of Sulphation on lead-acid batteries", and what it essentially is, is the reason why these batteries lose their effectiveness after being left in a discharged state for a period of time. What happens is lead sulphate is formed...

I did an experiment in my Chem II class that required finding the equilibrium constant for this reaction Fe3+ + SCN- ->Fe(SCN)2+ For the experiment, I had to use a calibration curve and Beer's law. How do I know that the calibration curve obeys Beer's law? I know that it would have to be a...

I was "Jenab" who wrote the "Transfer Orbits for Dummies: A Hillbilly Tutorial" that was stickied in this forum. I've written an improved procedure. The main improvements are: 1. A more straightforward calculation of the true anomaly at the non-apsidal endpoint of the intended trajectory...

Just done an experiment where you dissolve benzoic acid in water at different temperatures and different volumes of water. From the van't hoff equation you then plot a graph of ln(solubility) against 1/Temp which produces a straight line with gradient -ΔH/RT from which you get the enthalpy...

I have a graph of voltage verse frequency. Given that the charge of an electron = 1.6 x 10^-19 I need to obtain an estimate of the value Planck's constant. What equation do I need to use? Do I find the gradient of the graph?

I am doing a project in the lab to determine the phosphate concentration of a water sample. There are so many steps involved. Can someone point me in the right direction. I know that I will be making a reagent using 2.5g ammoniun molybdate in 30ml distilled water.Then mixing 0.125g ammonium...

Homework Statement I need to determine the potential of the following function: F = [2x(y^3 - z^3), 3x^2y^2, -3x^2z^2] The equation is given to be independent of path, and F \cdot dr = 0 The Attempt at a Solution \frac{\partial f}{\partial x} = 2xy^3 - 2xz^3 \Rightarrow f(x,y,z) =...

[SOLVED] Determination of Vitamin C I'm a little stuck on getting started on the calculations of a recent redox titration lab that I did, and was wondering if anybody could help me out. First I dissolved a 250 mg tablet of vitamin c in 50 mL distilled water. Then, I prepared a buret with...

Homework Statement Without a graphing calculator, how can you tell that the function f(x) = x/(x^2+1) is one-to-one? Homework Equations The Attempt at a Solution You can sketch both x and 1/(x^2+1) separately but I did not think it was obvious that when you multiplied them...

I am required to find all irreducible polynomials of the form xsquared + ax + b over the field F3, I have the 9 cases infront of me, i can see when something is reducible say xsquared is p(x)q(x) where p=x, q=x, but i have particular difficulty seeing when something is irreducible, e.g i know...

Is there a book that explain in a formal way the deduction of symmetry/antisymmetry of bosonic/fermionic wave equation e/o commutation relation? I've often noticed that some people use examples for the introcution, but is there an axiomatic deduction?

how can i determine the concentration of EDTA in PPM in an aquaous solution ? thanks

Below is the first in a series of questions that build on one another; however I cannot solve this initial one. Any help is appreciated. A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown. The ball's position is shown at 1.00 s intervals until...

How is estimating the probability that a future event might happen different from estimating the probability that a past event might have happened?

Hi! I'm working on a 3 phase induction motor. I need to measure the RMS values of three phase voltages, and single phase current which further feed power to the induction motor. I've implemented the true rms measurement (sum of squares method) algorithm for RMS value calculations and readings...

Hi... I x-posted this to the other chemistry board..but that might've been the wrong place... I recently performed an experiment to determine the % Cl (by mass) of an unknown chloride sample containing both potassium and sodium. To determine this, we did a Fajans method titration using 0.1 M...

I've been trying this out many times I just couldn't get the answer, I hope someone could help me out here. A stream of nuclear particles are traveling horizontally at 3.9 X 10^6 ms^-1 are deflected as it passes through a vacuum between 2 parallel plates which are 5mm apart and 40mm in...

using the number obtained 3.407x10^-8 coulombs/mole and the fact that one electron has a charge of 1.60x10^-19 coulombs, calculate how many electrons there are in one mole (i.e. Avogadro's number) I am not sure but do you do this problem like this? 3.407x10^-8coulombs/mole x...

The question is this: Consider p(z) a polynomial and C a closed path containing all the zeroes of p in its interior. Compute \frac{1}{2\pi i}\int_C z\frac{p'(z)}{p(z)}dz The solution given by the manual starts by saying that \frac{p'(z)}{p(z)}=(log(p(z)))'. But there is no...

Ive been posting many questions, hopefully the alst for awhile: You have collected data on sales and population within a one mile radius on 12 stores of a supermarket. You determined that the adjusted coefficient of determination is 93.85%. Determine the coefficient of determination. I...

During my work of space vehicle orbit determination, I have been confronted with a difficulty that hasn't been solved until now. When calculating the transition matrix that translate the process noises to the state parameters of position and velocity,how can I work out the partial derivatives of...

During my work of space vehicle orbit determination, I have been confronted with a difficulty that hasn't been solved until now. When calculating the transition matrix that translate the process noises to the state parameters of position and velocity,how can I work out the partial derivatives of...

hi everyone, im trying to find the atomic radius of an Al atom using a few measurements i have. i had a piece of aluminum foil its measurements were [ 10cm*9.9cm*0.0014cm ]. The mass of the aluminum foil was 0.40 grams. Is there any possible way i can find the radius of an Al atom? I know i...

Okay, I'm working on some pchem problems and I'm stuck on this one question... A 5.33g piece of Cu metal is heated to 372.85K in boiling water, then dropped into a calorimeter containing 99.53g of water at 295.75K. The calorimeter is sealed to the outside environment, and the temperature...

Can anyone provide a good reference (preferably on-line), or a decent description, of how the fundamental constants of electromagnetism are experimentally determined? I'm talking about constants like the permitivity and permeability of free space. I'm also curious how the unit of charge...

I am brand new to the physics forum community, so let me start off by saying hello to everyone. I am interested I am coming up with a MATLAB code for orbit determination. I saw a thread recently discussing this type of topic but i think it was orbit determination using RA and Dec measurements...

To help me in understanding this procedure, I read the fifth chapter of THE DETERMINATION OF ORBITS by A. D. Dubyago, as translated from Russian into English by the RAND Corporation. Much of the nomenclature used in this exposition is patterned after Dubyago. Initial Data. For i=1 to 3...

Nevermind, I found my mistake.. I've been trying to figure this problem out for some time now, and I can't seem to get it right: You are given an unknown hydrated metal salt containing bromide ion, MBr_2 \bullet nH_2O (M and n being variables). You dissolve 0.500g of this salt...

Simple Determination of Initial Velocity of a Projectile It is possible to roughly determine the initial velocity of a projectile shot from a launcher like the one linked to below using a number of methods. http://www.science4schools.co.uk/acatalog/10-1365.jpg Two of which I am aware...

Dunno if anyone that reads these boards has a background with Immunology, but here goes. As far as I understand it, heavy chain isotypes can switch on any given mature B cell due to the presence of Switch regions at the 3' of any isotype gene exon. This is regulated largely by cytokines that...

Hi all, hopefully someone can help me out here: I'm looking at the Gibbs' method for orbit determination, and I'm losing the conceptual picture in the vector calculations. I have no problems seeing how D and N point in the W direction (PQW coordinate system), but I'll be damned if I can...

I'm curious what others veiws are on this. Do those who are minorities, many of which are ancient races with a long history in the middle east region (Copts, Assyrians, kurds etc.), do these people have a right to self determination? Do you think minorities that have been oppressed, slaughtered...