Recent content by eventob

Homework Statement The problem (tried my best to translate it): A small high speed turbine is operating on compressed air. It deliveres dW/dT=100 W. At the inlet, the pressure is 400 kPa and the temperature 50*C. At the exit, the pressure is 150 kPa and the temperature -30*C. Neglect...

The problem (tried my best to translate it): A small high speed turbine is operating on compressed air. It deliveres dW/dT=100 W. At the inlet, the pressure is 400 kPa and the temperature 50*C. At the exit, the pressure is 150 kPa and the temperature -30*C. Neglect the velocity and assume an...

I've read some places that people discover hydrocarbons in intrusive and metamorphic rocks? For instance in Vietnam and Venezuela. Why is this? Is it due to migration from sedimentary reservoirs (for instance if a granite intrudes a sedimentary rock)?

Homework Statement My geology profesor gave us 50 questions to practice and check our progress. I have manged to answer all of them but two: Why would you study a volcanic rock in a sedimentary succession where oil is found? You work in an area where your sedimentary rock is host to...

Homework Statement I am supposed to show whether the series converges or diverges. I guess I need to use the ratio test … at least my calculus professor told us that we should use that test whenever we had complicated terms like n! and such. Homework Equations lim_n->inf a_(n+1)/a_n =...

Thank you very much. Solved it now. :) Didn't know that this forum supported TEX/LaTEX, much more convenient than my copy/paste method i guess.

Thank you. Tried to use the approximated formula now, and here is what I got. Think I got it right so far, but how should I proceed to solve it in terms of [H3O+]? Tried to multiply both sides with [H3O+]/[OH-], but I don't think that's right...

I am asked to derive the formula at the top of the picture, for the concentration of hydronium. Thought that the equivalence point was the point where number of moles of CH3COOH was equal to the number of moles og NaOH, so I tried to derive the formula from that equiality. :) Could I write...

Homework Statement This is a part of the lab report for a practical I did last week. I need to derive the following formula for the concentration of hydronium at the equivilance point of a strong base weak acid titration (acetic acid with sodium hydroxide). Homework Equations M=V/c...

Thanks again. :) I tried to Google it first, but could only find formulas without the crystallization water. So I was not sure how to handle that part. I am currently taking two different chemistry courses, one introductory and one who builds one the knowledge from the introductory course...

Thanks. But then, do I have to add hydrogen to the right? Fe+H2SO4 + 7H2O => FeSO4*7H2O + H^+

Homework Statement 10 g Fe and x ml H2SO4 forms y gFeSO4*7H2O Write a balanced chemical equation for the reaction, and determine the coeffisients y and x. The H2SO4 is 1 M. Homework Equations n=V*c n=m/Fm The Attempt at a Solution First thing I was trying to set up the chemical...

I am currently studying petroleum geosciences engineering. I am thinking about maybe taking an exchange semester to some other school (preferably in the US or Canada) (also considering Australia or ZA), but I'm not sure which one to choose. My university has an exchange programme with New Mexico...

Thank you very much. :)

Hi I've been working through some examples from the course material we use in physics class, but one thing keeps confusing me: What is the difference between centripetal and radial acceleration? For instance, when we have a particle traveling in a circular path, the acceleration towards...