Based on the second law of thermodynamics, how would you expect a system to change over time?
a. it would become more organized
b. its randomness would increase
c. it would become more efficient
d. its energy would increase

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Which type of reaction is shown in this energy diagram ?

What is the relationship between globular clusters and the milky way?