Using bohr's theory, predict the third ionization energy for 'li (in j). (hint: this is similar to the problem of finding the ionization energy of 'li". you can directly quote the results from problem 1 for a nucleus of an atomic number equal to 3 in your solution. however, in this problem, you are required to apply the reduced mass concept and modify your formula from problem 1 by replacing the mass of the electron, me, with the reduced mass of 7i (what is it? )

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)