How does one observe Lent? It differs from person to person and church to church, but some of the things Christians opt to do to observe Lent include: 1  On the first day of Lent (Ash Wednesday), some Christians mark their foreheads with ash as a symbol of sorrow and mourning over their sin.
An uncommon practice is to submerge the computer's components in a thermally, but not electrically, conductive liquid. Although rarely used for the cooling of personal computers, liquid submersion is a routine method of cooling large power distribution components such as transformers.
Dry Ice, Liquid Nitrogen, and Liquid Helium can all be safely used (rather than more volatile substances like liquid oxygen) for extreme cooling. In these cases, an aluminum or copper tube sits directly on the CPU (or GPU or RAM) and is filled with the cooling substance of your choice.