What is Analytical: Definition and 278 Discussions
Analytical chemistry studies and uses instruments and methods used to separate, identify, and quantify matter. In practice, separation, identification or quantification may constitute the entire analysis or be combined with another method. Separation isolates analytes. Qualitative analysis identifies analytes, while quantitative analysis determines the numerical amount or concentration.
Analytical chemistry consists of classical, wet chemical methods and modern, instrumental methods. Classical qualitative methods use separations such as precipitation, extraction, and distillation. Identification may be based on differences in color, odor, melting point, boiling point, solubility, radioactivity or reactivity. Classical quantitative analysis uses mass or volume changes to quantify amount. Instrumental methods may be used to separate samples using chromatography, electrophoresis or field flow fractionation. Then qualitative and quantitative analysis can be performed, often with the same instrument and may use light interaction, heat interaction, electric fields or magnetic fields. Often the same instrument can separate, identify and quantify an analyte.
Analytical chemistry is also focused on improvements in experimental design, chemometrics, and the creation of new measurement tools. Analytical chemistry has broad applications to medicine, science and engineering.
Hello all,
I wanted to know if there are ways to find analytical solutions for a set of equations defined as follows:
1) x''(z) + B(y,z)*y'(z) + C(y,z) = 0
2) y''(z) + B(y,z)*x'(z) = 0
where ' represents derivative wrt z. and we need to determine y(z) and x(z). B(y,z) and C(y,z) are...
Even though it is uncommon to see questions asking for an analytical solution to equations of degree 3 or 4, they have been asked on the forum. It's also good to know how, in any case.
Cubic : http://www.karlscalculus.org/cubic.html
Quartic : http://www.karlscalculus.org/quartic.html...
(This is not homework, just part of a curious problem)
Is there an analytical (non-numerical) method/way to evaluate
\int\limits_0^{2\pi } {\sqrt {1 + \left( {h k\cos kx} \right)^2 } dx}
?
I am not quite sure how to start this problem:
A bullet of mass m is fired from a gun of mass M. If the gun can recoil freely and the muzzle velocity of the bullet is v. Show that the actual velocity of the bullet relative to the ground is v/(1+b) and the recoil velocity from the gun is...
Let,s suppose we have the asymptotyc development of the integral:
\int_{x}^{\infty}F(t)=g(x)[1+a/x+b/x^{2}+c/x^{3}+...]
where a,b,c,.. are known constants and g(x) is a known function then you all will agree that this expression could be useful to compute the integral when x-------->oo...
I'm stuck on this problem:
The initial conditions for a two-dimensional isotropic oscillator are as follows: t=0, x=A, y=4A, v=0i +3wAj (vector) where w is the angular frequency. Find x and y as functions of t.
Where do I even begin with this problem. I take it A = constant. Can anyone...
Are there any analytical solutions to:
ay''+bx^2y+cxy+dy=0
where a,b,c,d are constants and y(x)
If so how would you go about it? Is there a website that teaches you how to solve these?
VECTORS..help please
hi there
i had these 2 questions that i wanted someone to please double chek for me..
Q1) Given vectors A= c i + c j + 3k and B= ci + j - 2k where c is any constant.
a)Find a value of 'c' such that A is parallel to B?..
b)Find a value of 'c' such that A and B have...
I was wondering about what people consider good science based majors
I want:
A challenging degree(important)
mostly based on independent work(pretty important too)
Good job prospects and pay(not that important)
analytical with theory and practice
Logical and conceptual in nature.
I...
Hi,
Does anyone know a reason why \int_{-\infty}^{\infty}\cosh(x)^{-n}dx (n>0) can be evaluated analytically when n = 1,2,3,..., but only numerically when n is non-integer. I don't know if there is a "reason", but I'm using this result in a Quantum Mechanics project and it would be cool if I...
Thanks for integral, he made the potential.pdf analyse for an analytical mechanic but i still have 2 questions,
1- Why does the length up between the tengency point and top of (h) equals:
\ell + r\theta ?
2- Why the kinetic energy here equals:
T = \frac{1}{2} m(\ell + r\theta)^2...
Hi guyz, I taked the picture attached with my mobile directly from the book, please help me to find the weights of A,B (not masses), and the friction coefficient (f) for A on the Horizontel plane, and note, the rope isn't able to change lenght, System is static, A,B are equal, weight of K is Q...
Sorry for that title, but what can I say, I'm going to be mad to get the motion equation for some systems but always failing
system 1:
a rope rounded to a cylinder, the rope ends with a mass m and creating a pendulum with a maximum angle creating on a vibration \theta, the length of the...
Alright, this one is from my analytical chem. class and right now we're doing separations and all the calculations related (partition coefficients, etc.). Anyway, I'm having trouble with this one. It seems easy, but let me know what you think a good starting point would be...
What total...
Is there any treatment of a general character about analytical continuations? They're largely used in physics and in a lot of mathematical tricks for calculate integrals, but I have never seen a general theory? Where can I find it?
im looking for an exact analytical solution for the following
(1/alpha) * dT/dt = d2T/dr2 + (1/r)*dT/dr
where d is actually dou(partial diff.)
subject to the boundary conditions,
a<=r<=infinity
t>=0
T=Ts (constant) at t=0;
-dT/dr + HT = H(Tf) at r=a; where H, Tf are...
i am now trying to figure out the electro-field around a rectangle waveguide. the refractive index of the waveguide is n1, which is larger than that of the cladding, namely n2, outside. we may regard the waveguide embeded in the cladding material.
as following shown, the waveguide...
hi
i am writing you from turkey.i am a physics student.it is my 2.year.i have a lesson called analytical mechanics.i want to ask to other physics students that they have a lesson like this or not.if you have can you tell me how can i pass it.it is very hard...
hello everybody,
i would like to have an open discussion with everybody here about the analytical model for linear PM generator.
recently, new design has focusing on using of TFPM generator for its efficiency and stability.
due to that, i think the most suaitable step to take is using the...
If some dude jumps into the ocean from a 10m diving board so that when he makes contact with the water F=-mg + cv^2 where c is some frictional constant, how do I solve for the velocity of the guy as a function of the depth under water? I am able to integrate so that I obtain velocity as a...
Wheel A with diameter x rolling around a fixed wheel B with diameter 2x. How many revolutions about its own axis will wheel A makes in rolling once around wheel B?
There is slow & steady addition of Threads in MATHS Forum. So I thought of making it more interactive with some puzzler
The point (1, 0) is on a circle, which center is on the line y = -2x. The line 3x + 4y + 15 = 0 is a tangent to the circle. Find the equation(s) for the circle(s).
Thanks,
I was wondering what people thought about the notion of creating a forum for analytical mechanics, i.e. Lagrangian and Hamiltonian dynamics. If not then what forum would you recommend discussing the subject?
Thanks
1089 and all that. A Journey into Mathematics.
David Acheson
Oxford University Press (www.oup.com)
ISBN 0-19-851623-1
Introduction: You like maths don't you? Of course you do, because you would be making haste to get out of my sight before I damn your eyes with a strategically and...