HELP ASAP How are the bars in barred spiral galaxies thought to have formed?
A. separation
B. primordial collapse
C. merging
D. slow evolution

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.