depends on why you are measuring it...
if you are measuring to know how much food it can hold, measure inside.
The energy comes from the heat taken from the heat/energy inside of the refrigerator/fridge. A fridge takes heat energy from inside the fridge and dumps it outside the fridge into the the pipes on the back of the fridge and into the room.
It works by pumping the heat that is inside the fridge to the outside, leaving the inside cold. If you put your had behind a fridge you can feel the heat emerging.
It is cold inside because thermal energy gets trapped outside because of the particle theory.
The coolant absorbs heat inside the fridge, carries it outside, and releases the heat to the air.
Because the temperature is the same inside and outside the can, moisture condenses on the outside once you take the can from the fridge into a warmer humid place, however this would not happen if you took the cold can to a place at least as cold as the fridge.
The inside.
because its insulated like a starefome cooler
Because the refrigerator takes heat from colder region (inside) and throw it to the hotter region(outside) in order to maintain the lower temperature inside.
Callipers
I'm pretty sure it's the outside...
Mold grows faster inside the fridge. The fridge is like an incubator for mold and fungal growth. This is due to the lack of oxygen and excess moisture in the fridge.
335 degrees