Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation

a.
write the local newspaper and explain that ufos have been seen in the roswell area
b.
research any and all data pertaining to the roswell area, and unidentified flying objects reported in the sky
c.
make an official report to the united states government about his observation
d.
ask his neighbors to observe the sky with him for the following few nights, to see if they can repeat the original observation

The answer to this question is b. David should research any data pertaining to Roswell and UFOs reported. this way he can research to find information that would back up his observation. if he did any of the other answers it wouldn't make his conclusion valid and purely subjective.

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

A.(nh4)(2co3)is the correct answer