Recent content by RagincajunLA

I was wondering if there is a mathematical difference between the RMS free path and the mean free path of molecules in an ideal gas. For example, When I calculate the mean free path, I use use the average velocity and the scattering rate which is a function of the average velocity. I then...

I have a homework problem that I completed but I am not sure if it is correct. I was wondering if you guys could let me know if my thought process is correct of if I need to modify my solution. The problem is: An adiabatic and rigid open vessel contains 4 kg of air at 300 K and has a volume...

Hey guys, I'm trying to learn fluid mechanics while at an internship and i just have a quick question. Let's say i have a fluid flowing down and incline plane with a quadratic velocity profile. Which direction does the shear stress (tau) act? I know the formula for shear stress is tau =...

but why use the product rule in the first place? dp/dt should equal (dp/du)*(du/dt). why isn't dp/du equal to γm? isn't it the same thing as taking dy/dx of y=2x? in that case the derivative is just 2. so why isn't the derivative of γmu equal to γm? then you just multiply that by du/dt which is...

Hey guys, I just had a quiz on relativistic energy and there was a question on there that I was sure I got right but got marked wrong and I think my prof did it wrong. Please tell me what you guys think of this... The relativistic momentum of a particle traveling with velocity u in frame S is...

Hey guys I am doing special relativity in my physics class and we are working on time dilation. Right now I am really confused by what my teacher said and what the book says. Can someone help me out? here is my question... Your friend flies from Los Angeles to New York. She carries an...

Hey guys I just need some help on something The question is: A motor attached to a 120 V/60 Hz power line draws an 8.50 A current. Its average energy dissipation is 800 W. I got the first 3 parts of this question correct... 1. What is the power factor ans = .784 2. What...

hey guys, i was given some data points and i had to find an equation to fit the model. now my differential equation is h'= ah^b - ch^d with b < 0. I can't find any method for integrating because i don't know the constants in the equation. but i have the data points so that must help somehow. i...

Hey guys, I have a problem in one of my classes where I need to make an equation of capillary rise in a strip of paper towel. I am given data points and I need to make an equation that fits the points. Can someone please help me through the physics and derivation behind this. I tried doing some...

Ok here we go. I have my notes with me this time. we were given a set of data like this: (0,0)(1.32,5)(2.5,.75)(6.22,1)(14.25,1.25)(24.94,1.5)(224.72,2.5)(1023.68,3.5)(4330.4) The x-values are the time values in seconds and the y values are the heights in inches. My professor said the starting...

hmmm ill have to try that out. but isn't is ln(y)=ln(c)+pln(x)?

its only 10 points of data. its ok if u don't have time. I understand everyone else is pretty busy during this time of year

actually, the graph looks more like a y=x^.5 graph, but levels off at a certain height. it has a high slope at the beginning and the slope decreases as time goes on. So here is my method that doesn't seem to work... i am guessing that my function is y=Cx^p with p<1 I then take the natural log...

tiny tim, i did what u said and found that the log of time does provide a straight line function. but when i try to reference it back to my original function, it is not accurate at all. I am stuck. Would it help if i were to post the data that i am trying to find a function for?

Tiny-tim, Im sorry but what would plotting it against a log of time and giving a straight line provide me? I am very confused on this problem...