According to the wiki,


  While the technique can be extremely beneficial, attempting to use multiple clones for training purposes can be mentally harmful to the user, as not only is all the experience collected by the user, but so is all the mental stress from training each clone


Now, when a clone is destroyed, there must be some mental stress involved. So does Naruto (or anyone else) feel anything when their shadow clones are dispersed? 

Nothing has been shown to indicate this (at least in the anime). I was wondering why this would not be applicable.


Question: Will a 78S12 be cooler than a 7812 when handling the same load?
Answer: I'm comparing the datasheets for ST Microelectronics' versions of these:


L78S12CV
L7812CV


The performance characteristics, such as Output voltage vs. junction temperature, is identical for both.

The operating (junction) temperature is different, 7812 is 0-125°C; 78S12 is 0-150°C.

In both cases, in a TO-220 package, the thermal resistance is the same: 5°C/W for junction-case, and 50°C/W for junction-ambient.

Based on this information, I would not expect the 78S12 to run cooler given the same load and heatsink. But it can handle higher operating temperatures, which may be a reason to favor it.