Recent content by Eiano

molecular motion is invisible in itself. when a small particle is suspended in a fluid, bombardment by molecules makes the particle jitter about at random.Robert Brown discovered this motion in 1827 while studying plant fertilization. Albert Winstein analyzed it in 1905 and Jean Perrin used it...

Anyone else? (i KNOW my u can't be 25+e^2x, that's what th OR WHAT was for) but HAHA, u were so funny with that response.. haha

Hey, everyone I am working on a calc problem, and I have no idea where to start. The integral is e^x ------------- [division problem] (25+e^2x)^4 Do I let my u equal to the 25+e^2x? or what... then after that what do i do. Thanks for all the help in advance. -Eiano

ohhh i didn't mean to put in 5 as the mass :) so i have to find the initial velocity first? it's not just 7 huh... then find the final V and doo Vector addition, ok thank you all very much!

I have this problem that says a 3 kg object has a velocity of 7.00m/s j (vertical, right?). Then a total of 12.0Ni (horizontal) acts on it for 5 seconds. What is the objects final velocity. I know that the equation is Ft=mvf-mvi I could just plug everything in, but what's bothering me is...

it's okay! at least there was someone out there to help me. again, i appreciate it! Thanks. :)

ahh i forgot the x0, you are right, thank you!

isnt Vo the initial velocity which is 30 m/s?

Hello! I've been working on this problem for a while and our book doesn't have a solutions manual. It has 4 parts to it and I've solved 2 already, (I think) and the last 2 are just getting to me. -A ball is thrown from the top of a building and is given an initial velocity of 30 m.s...

thanks, i read the book and didn't get this concept, thanks again for clearing it up.

Okay, so for 1b.) since it's at equilibrium, the sum of the forces must be equal. (err, must equal 0)? Fs= (uS)(N)? Fs= (.22)(25) Fs=5.5? Is this good or am I still missing something. and thanks for correcting my error on 2. :blushing:

Hello all, I'm new to this site and think it's a great idea to have a Physics site to help with, b/c we all know physics is the devil... (j/k) :) Anyway I have this problem which I think i figured out but want to be sure. Suppose a block of mass 25 kg rests on a horizontal surface...