Yes
they are cool
sand cools of faster because the sand is less dense and it depends on witch sand beach sand will cool of faster because it is mostly water under it so it will cool of faster
No it will not cool faster. What you can do to cool faster is set your blower speed to high. That will have more air blowing through your vents and that will cool the house faster.
A rock at the surface will cool faster than a rock underground.
Cooling them properly.Most people think that the longer they cool food the better they will be. That is NOT true. The FASTER you cool foods the better. The best way to cool foods to refrigerate or freeze is to put them in an ice bath. Put the food in a shallow pan and put that pan in a bigger bowl or pan filled with ice and water(more ice than water). This gives the food a quick cool down which keeps out bacteria.
Yes, until it is cool. Then place in the fridge.
No
air
You cool a pie because if you dont it will burn in your mouth it happened to me once.
Sand cools down faster after dark
It does cool faster, it has a lower specific heat capacity and so cools at a faster rate, only by a few degrees over say 30 minutes, but it is.
of course