In the 1887 experiment by michelson and morley, the length of each arm was 11 m. the experimental limit for the fringe shift was 0.005 fringes. if sodium light was used with the interferometer (λ = 589 nm), what upper limit did the null experiment place on the speed of the earth through the expected ether?

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

What is the range? can’t seem to find it out

Find the distance between (0,5) & (-4,2)