Saved Bookmarks
| 1. |
Compare the kinetic energies of rotation of the pulgar and of the Sun . What is the source of the increase in kinetic energy? |
|
Answer» `k_(o.)=(I_(o.)omega_(o.)^2)/2 =(4pi^2M_(o.)R_(o.)^2)/(5T_(o.)^2)` The kinetic energy of pulsar.s rotation is `K=4pi^2M_(o.)R^2//5T^2` The ratio of these quantities is `K/K_(o.)=T_(o.)^2/T^2~~2 xx10^9` The INCREASE in the kinetic energy of rotation of a star in the process of its contraction (COLLAPSE) is at the expense of the WORK of gravitational forces. |
|