Volkswagen Golf Service & Repair Manual: Heat always flows from warmer to colder material
Every material consists of a mass of moving molecules. The fast moving molecules of a warmer material loose part of their energy to slower molecules possessing less heat. This slows down the molecules of the warmer material and accelerates those with less heat. This continues until the molecules in both materials are moving at the same speed. They have the same temperature, and no further exchange of heat occurs.
Physical basics
The four known physical states of water also apply to air
conditioning refrigerants.
1 -
Gas (invisible)
2&nbs ...
Pressure and boiling point
The boiling points given in the table below are always based
on an atmospheric pressure of 1 bar. If the pressure on a liquid
is changed, its boiling point changes al ...
Other materials:
Identification markings on the tyre sidewall, tyres with run-flat system
(PAX)
As compared to standard tyres, run-flat tyres (PAX) have
different codes and designations on the sidewall. This makes it
easy to identify run-flat tyres.
Codes and designations on tyres with run-flat pro ...
Removing and installing sunlight penetration photosensor -G107-
Special tools and workshop equipment
required
Removal wedge -3409-
Removing
–
Unclip sunlight pen ...
Checking compression
Special tools and workshop equipment
required
Spark plug socket and extension -3122 B-
Compression tester -V.A.G 1763-
...
