Exercises 1 What is the energy associated with the fifth orbit? b. Calculate the radius of Bohr's fifth orbit for a hydrogen atom.
2 A hydrogen atom makes a transition from the n = 3 level to the n = 2 level. What is the change in energy?
3 An electron is in the second excited orbit of hydrogen, corresponding to n = 3.
Find (a) the radius of the orbit and (b) the wavelength of the electron in this orbit.​

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?