Recent content by coca-cola

Thanks sir! Your response helped me solve the problem.

How did you find that?

Maxwell's relations. I still don't know how that gives anything concrete.

Homework Statement A solid has energy (for one mole): ##U_1 =\frac{S^2}{a_1}+b_1V(V-2V_0)## Write H, F, and G in terms of their proper variables. Homework Equations Maxwell's relations and H=U+PV F=U-TS G=U-TS+PVThe Attempt at a Solution [/B] H, for example: I have tried writing dV as a...

Thanks! So is the definition simply the chain rule of a function that depends on q_1, q_2,...q_N, and t? If the function had no explicit dependence on t, even though the generalized coordinates did, would you simply drop the partial with respect to t?

Hey all, I am reading Goldstein and I am at a point where I can't follow along. He has started with D'Alembert's Principle and he is showing that Lagrange's equation can be derived from it. He states the chain rule for partial differentiation: \frac{d\textbf{r}_i}{dt}=\sum_k \frac{\partial...

Hey, just checked back in. My apologies guys, I don't post often. I didn't even see the preview option. I'll keep that in mind. Thanks for the formatting help!

Hey all, I am reading Goldstein and I am at a point where I can't follow along. He has started with D'Alembert's Principle and he is showing that Lagrange's equation can be derived from it. He states the chain rule for partial differentiation: \frac{d\textbf{r}_i}{dt}=\sum_k \frac{\partial...

PF, I work as a researcher at my undergraduate institution. I have to give a presentation in a week and this question always gets me. What does learning the properties of these SNRs contribute to the overall body of knowledge? What does the scientific community gain from this knowledge...

Hello everyone, Four years ago I went into physics because I was curious and had nothing else to do. As I continued I was pushed and pushed to attend graduate school. For most of my college life I thought that I did want to attend graduate school. However, now that I have decided to think for...

Hello PF, If it isn't too much trouble, how did you guys decide what kind of research you wanted to do in graduate school? I will soon apply to graduate school yet I still don't really know what I want to do. Does this mean that I don't have a passion for physics? I really only have experience...

Haha yes! Thank you very much!

The only one that I can think of is a frictional force exerted downward on the larger block. Is this correct?

The attached diagram is a correct representation and it states "...minimum force F..." in the problem. I have three forces on the smaller block: Force to the right exerted by the bigger block Gravity downwards The frictional force that keeps the block up upwards On the larger block, 5 forces...

Homework Statement Two blocks of masses M and m are oriented as shown in the diagram. The block M moves on a surface with coefficient of kinetic friction μ_1, and the coefficient of static friction between two blocks is μ_2. What is the minimum force F which must be applied to M such that m...