Avalley of rolling hills is an example of monoclines anticlines and synclines horsts and grabens fault-block mountains

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

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