Recent content by Roger Wilco

Nevermind. I am stupid!

Homework Statement I am reviewing some very general chemistry and for some reason I cannot come up with a method of approach for this problem? I know that there are 1 amu/atom and that there are 1g/mol and that there are 6.022*10^24 atoms/mol. How do I put it all together?

Okay. Let's try to save the morality speeches for another time. I would rather not talk to much about my past then is necessary. I know I was a retard and have since then given my life an entire makeover. I am close to thirty years old. I was bagged for drunk driving once at 19 and once...

Oh good grief. I feel like such a mutton-head (is mutton-head hyphenated?). Thanks Midy, ~RW

Homework Statement Ball A is released from rest at height of 40 ft at the same time Ball B is thrown upward from 5 ft off the ground. If the Balls pass one another at 20 ft above the ground, determine the speed at which ball B was thrown upward. Homework Equations v=v_o+at...

So it seems that my instructor left out the fact that at point 1, V_1=.2m^2. And I am supposed to used the fact that dS=\frac{\delta Q}{T} to find V_2. I know that 1-->2 is an isotherm, but I do not see how that would help. I that along the isotherm, W=nRT\ln\frac{V_f}{V_i} but I don't see hpw...

The area inside the triangle abc= the total Q of the system right? I know that is cyclical so Delta E total is 0...So total W=total Q, but I am still having trouble relating this to Volume of 2? RW

Damn...

I am not sure, but I believe you could find n by using the volume of the room and the fact that it is at 20 Celsius. That is since density=mass/volume. I am just guessing though. RW

Are you using r in meters and T in seconds?

I'm dyin' over here! Any ideas..i've been looking at this one since yesterday?!

Entropy vs Temp graph..find Volume?? Homework Statement I need to find V_2 by usinf the Temp vs. Entropy graph attached. It says as a hint to use part b in which I found Q_{23}=0 by finding the area under the curve (where ds=0). Homework Equations Since Q=0 I know \Delta...

So to actually evaluate this expression when I am given pressure in atms and volume in cubic centimeters do i need to convert these units into SI. I see that the coefficient of 1/(1-n) is dimensionless. And I had assumed that since p1v1-p2v2 had the SAME dimensions it would be okay to NOT...

But which do I use...I know p_1V_1^n=p_2V_2^n oh..wait... how about I distibute c first and then replace it...it's clear now. Thanks Doc! You're the best! RW

Gotcha...now I am having trouble putting that in terms of p1 and p2...I now have it in terms of c...and I still have 1-n up in th exponent...do I need a natural log somewhere? Thank you RW