[SOLVED] Physical chemistry problem
Homework Statement
A closed vessel of 5L volume is kept at 80 degrees celcius and contains a mixture of two liquids A and B dissolved in a solvent, with their initial concentrations [A]=0.1mol/L and [B]=1.0mol/L. The volume of the gas phase is 2L and it...
Homework Statement
The questions i'v been given are
1. With the aid of a diagram, describe the mechanism of CUMULATIVE feedback regulation in branched metabolic pathways. (5 marks)
2. Explain how the use of iso-enzymes allows cells to regulate metabolic pathways using feedback...
Thanks very much for the information. I completely understand about the download link, and i'v now attached a PDF file of the presentation. I think the answer to part a may well be on the second page. However unfortunately i'm still at a dead end on (b). Would it require plotting a graph? If so...
Homework Statement
Hi, having not studied biology i'm struggling to get to grasps with what are probably basic concepts. Looking through the notes i have i was just wondering if the equations/derivations i'v attached are relevant, and if so how. A link to the powerpoint file can be found...
Homework Statement
x^2\frac{dy}{dx}=\frac{2sqrt(y)}{x^4}
Where y(1)=3
Homework Equations
The Attempt at a Solution
\int \frac{dy}{2sqrt(y)}=\int \frac{dx}{x^4}
4sqrt(y)=\frac{-1}{3x^3}+c
c=4sqrt(3)+\frac{1}{3}
So i end up with...
Homework Statement
\ \frac{dy}{dx} + 2y = xe^x
Homework Equations
The Attempt at a Solution
I'v only ever solved differential equations where values can be seperated easily, i understand i may have to use something called the integrating factor but this does not seem to fit...
Homework Statement
Compute the following antiderivative \int (sin^3(x))(cos^4(x)) dx
Homework Equations
The Attempt at a Solution
If this problem requires use of integration by parts i'm struggling to work out to split it up and make it manageable. Have searched countlessly for...
Homework Statement
Compute the following antiderivative \int \frac {(2x+1)}{ (x^2+1)} d \ x
Homework Equations
The Attempt at a Solution
I tried a method using using substitution of u = x^2+1, but i think this is approaching the question in the complete wrong way. I think maybe some kind...
Homework Statement
In a closed system shown in the Figure below (http://i18.tinypic.com/7x1r8mo.jpg"), the piston is freely moving without friction and the system is initially filled with gaseous molecules A only. The mass of a piston is 100 g, its area is 10 cm2 and it is 10 cm from the...
Homework Statement
Obtain the derivative of e^{2x} from first principles.
Homework Equations
The Attempt at a Solution
I am upto the point where i have e^{2x}(\frac{e^{2h}-1}{h}) Where LIM h->0.
I just don't see how 2 is obtained from what's in the ().
Just reading over the question i realise i made a mistake, the interval is in fact [-2, 1]. Do i need to substitute all of the numbers in the interval to the equation, ie. -2,-1,0,1?
[SOLVED] Maximum and minimum problem
Homework Statement
Determine the global maximum and global minimum of the following func-
tions on the given interval, or indicate why these do not exist.
f(x) = x^{2}e^{x} on [2, 1].
Homework Equations
The Attempt at a Solution
I do not...
Homework Statement
Determine \int4dy/(1+9y^{2}) With limits of 2,0.
Homework Equations
The Attempt at a Solution
Have attempted ingtegration by substitution but have had no luck solving this problem. A maths tutor who went over it very quickly established there was a tan in the...
Homework Statement
Calculate the derivative of tan^{2}(sin(2x+1)^{6})
Homework Equations
The Attempt at a Solution
I assume this uses chain rule, by do not see how tan^{2} can be derrived.