What information is given on the y-axis of graphs of stellar spectra?

What were some passive/non-direct ways that enslaved africans did to resist slavery?

Which of the fallowing sports became spectator sport at the turn of the century ? a)basketball and boxing b)soccer and football c)racquetball and badminton d)polo and swimming

Ascientist successfully predicts the outcome of an experiment. you watch carefully and know he didn't cheat. the scientist's success shows that: a) the scientist knows absolute truth about this experiment; success is not possible unless you know the truthb) the scientist was just lucky; no one ever knows what's going on, so successful predictions require luckc) the scientist may know the truth, or at least know something that is close to the truth, or the scientist may have gotten lucky this time; you can't be absolutely sured) the scientist really was cheating, even though you didn't see the cheating; no one can get things right, except by cheatinge) the scientist spent the night at a particular hotel chain and go a free breakfast, giving the scientist the ability to do amazing things