Ahydrogen atom, with its electron in the 4f state, is placed in a 1-t magnetic field. calculate the total energy spread (in units of ev) of this 4f state. ignore all spin effects

Fossils have been found on two continents that are split apart, this is evidence that ? a. there was a bridge b. the continents were once joined together c. the life just appeared in two locations independently d. they swam across the ocean