Recent content by Zipzap

Homework Statement Which of the following will form a micelle? http://imgur.com/VFksg Homework Equations The Attempt at a Solution I know for sure that A, B and C are going to be micelles, since both are amphipathic molecules. They have a clear hydrophilic and hydrophobic part...

SOMEBODY PLEASE HELP ME! I have to hand this in tomorrow and I won't have any time tomorrow morning to do any work on it! Any help whatsoever for #2-4 will MAKE A HUGE DIFFERENCE! =D =D =D

So then I have #1-2 right? What about the last two questions?

Would it be 0.0 since (delta)U = 628.6 - 628.6 = 0? Because I know that q + w =/= nC(v,m)*(delta)T. Do you have any comments for my other questions? They would really help! =)

Homework Statement 1. Ideally, the handle of a frying pan should not get hot while you are cooking with it. Based on the information listed in Table 2.8 of your textbook (or 2.7 in 8th, 2.6 in 7th ed.) choose the substance below that would be the best frying pan handle material. Assume that...

Ok, now I'm confused: I know that I have to add the inertias together. The sphere will have a different inertia that I have find using the parallel axis theorem (no clue how to do this), and without the center of gravity, I have no idea how to find "d" Any other helpful advice?

About its axis? But it's attached to the rod, how am I supposed to find it using parallel axis theorem??

And I can add them both because the pivot point is unchanged and the sphere itself contributes to the overall inertia, right? Anyhow, I get (1/3)ML^2 + (2/5)MR^2, giving me a numerical value of 0.7666666 when I sub in my values. What do I do about "d" when I input it into the formula for...

So then I can just simply add inertias for both the rod and sphere to get my moment of inertia?

What do you mean by that? You mean where the rod is being suspended?

All right, here goes nothing =P I know that the rod has inertia of (1/3)ML^2, and the sphere has (2/5)MR^2... I also know I = integral of r^2, r = L+R... Am I on the right track here?

Homework Statement A pendulum is constructed using a thin rod (m1 = 2.0 kg, L = 1.0m) and a uniform sphere (m2 = 1.0 kg, R = 0.50 m). The period in "s" for small oscillations is: a) 1.5 b) 1.7 c) 2.0 d) 2.2 e) 2.5 Homework Equations T = 2pi *sqrt(I/mgd) The Attempt at a...

Well, Mark44, I have that in the beginning to. I then multiply denominators to get a common one, and I end up with something like: { [ (x+h)(3x-1) - x(3x + 3h -1) ] / [ (3x+3h-1)(3x-1) ] } / h { ( [3x^2 - x + 3hx - h] - [3x^2 + 3hx -x] ) / [ (3x+3h-1)(3x-1) ] } / h My...

Ok, I am really stuck on this one. I tried using the first principles formula and everything, but I don't get two separate terms like I am supposed to in the actual derivative. I always end up with -1/(3x-1)^2 when I try. Can someone please help me out?

Venkatg: Let me see if I have this down right... KE(B) = KE(A) + PE(A) - F(fric) - W(app) -F(fric) = KE(B) - KE(A) - PE(A) + W(app) -F(fric) = 20 - 10 - 4*9.8*5sin37 + 10*5*cos37 Unfortunately, I get the right number, but I end up getting it positive and not negative. Where did I go wrong?