Hello all.
I am performing chemistry experiments and recording the times of various observed results. What I am doing currently is performing the test several times in order to determine what result is "normal."
My goal is to determine a range as a standard by which all future tests will...
Hello all.
I'm tutoring a high school student and am having trouble with a seemingly simple science project that was assigned: How to remove table salt from water. Having graduated as a Chemical Engineer, I said distillation! But the problem statement says you can't be that boring. Then I said...
Hello all;
I'm doing work for my job, and I've forgotten my statistics =(.
I first want to know if what I'm trying to do is possible.
I want to create a linear regression of the form Y = a * x1 + b * x2 + c.
http://imgur.com/Q4vGP" [Broken]
As you can see, there is space that is...
Here is the situation:
We are building a small model car (roughly 8 in wide by 18 in long) whereby hydrogen is produced in a chemical reaction, travels through some tubing to our fuel cells, which in turn powers the motor.
The issue lies in the start-up procedure; it is required to purge...
Hello, I'm doing work in Fuel Cells and am having difficulty with a simple issue; the Nernst Voltage (E) is greater than the Standard Potential (EO)
The only electrochemical reaction considered is H2 + 0.5O2 --> H2O
The Nernst equation for this reaction is
E = EO - (RT / 2F) ln (PH2O / (PH2...
Hello, I'm taking Physical Chemistry I in second year, and my prof does not have a required book for the course and everything will be based off his notes (which are very good by the way)
However, I would like a deeper understanding of the material, and the prof did recommend two books. What...
Hello, I'm taking Physical Chemistry I in second year, and my prof does not have a required book for the course and everything will be based off his notes (which are very good by the way)
However, I would like a deeper understanding of the material, and the prof did recommend two books. What...
Hey everybody
I'm looking to buy a set of these:
http://www.sciencelab.com/page/S/PVAR/10615/10-2410
the 5mm OD tubes that become malleable when subjected to heat (for a little project I want to do). Unfortunately, this website does not ship to Canada.
Anyone know of any brick & mortar...
Prove the following statement:
\[
\sum\limits_{r + s = t} {\left( { - 1} \right)^r \left( \begin{array}{c}
n + r - 1 \\
r \\
\end{array} \right)} \left( \begin{array}{c}
m \\
s \\
\end{array} \right) = \left( \begin{array}{c}
m - n \\
t \\
\end{array} \right)
\]
Any initial...
A curiosity I've had recently...
When repeatedly taking the cosine of a number in radians, it appears to converge to a value.
i.e. cos(cos(cos(...cos(x)...))) = 0.73908513321516064165531208767387...
Any thoughts/explanations/exact solution etc?
Thanks.
What is the volume of the figure bounded by y = 2x - x^2, y = 2x, x = 2, and rotated about the line y = -1.
Is this the correct integral?
\[
V = \pi \int_0^2 {((2x + 1)^2 - (2x - x^2 + 1)^2 } )dx
\]
Thank you for your time.
I need to determine an algebraic form for arcsech(x) = ?
So far what I've come up with is as follows:
\L\
\begin{array}{l}
y = \frac{2}{{e^x + e^{ - x} }} \\
y = \frac{2}{{e^x + e^{ - x} }}\left( {\frac{{e^x }}{{e^x }}} \right) \\
y = \frac{{2e^x }}{{e^{2x} + 1}} \\
ye^{2x} -...
A small car has an initial speed of 4.0m/s just before it enters a loop. What is the largest value for r (radius) that the loop can have if the car is to remain in contact with the circular track at all times?
Answer: r = 0.327m
What I tried was; before the car enters the loop it posses pure...