The Zeeman effect, in which energy levels of electrons are shifted and produce a corresponding split in spectral lines observed, is used to measure at the Sun's surface.

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj

the answer is:

a. a closed question always has yes or no​ answers, whereas an open question is a​ free-response question.