Assume that all four h-r diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core. rank the hr diagrams based on when each stage occurs, from first to last.

a. star in the sequence
b. a little outside
c. more outside
d. then below the line

How to tell if a molecule is polar or nonpolar with electronegativity

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration