While discussing the SN1 mechanism, we learned that H2O is an extremely weak nucleophile. So weak that it CANNOT perform an SN2 mechanism. Analyze the properties of the oxygen atom in H2O, since the oxygen is the atom that attacks in an SN1 mechanism. Which nucleophiles listed below share similarities to H2O and would be expected to be very weak nucleophiles as well

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 

Wagons/motorized vehicles

That depends. cause the owl finished it in one lick