Estimating the luminosity class of an m star is much more important than measuring it for an o star if you are determining the distance to that star. why is that the case?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Which transition by an electron will release the greatest amount of energy? oa ob oc od