When tossing a certain number of coins, a macrostate is Select all that apply. analogous to the entropy of a system the number of heads obtained analogous to specifying p, T, Eh etc. for a macroscopic system the multiplicity of the states

Explain, in your own words, how entropy is used in statistical physics.

A 2000kg car travelling at 90km/hr crashes into a concrete wall. After that, the wreckage equilibrates to an ambient temperature of 24'C. Calculate the contribution of the crash to the entropy change of the universe.

Polymers, like rubber, are made of very long molecules, usually tangled up in a configuration that has lots of entropy. As a very crude model of a rubber band, consider a chain of N links, each of length L Imagine that each link has only two possible states, pointing either left or right. The total length L of the rubber band is the net displacement from the beginning of the first link to the end of the last link. Using the thermodynamic identity, you can now express the tension force F in terms of a partial derivative of the entropy. From this expression, compute the tension in terms of L, T , N, and l.