Volkswagen Polo Service & Repair Manual: Physical Principles
| The four known states of water also apply to air
conditioning system refrigerants. |
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| When water is heated in a vessel (heat absorption), water
vapor can be seen to rise. If the vapor is further heated
through heat absorption, the visible vapor turns into invisible
gas. The process is reversible. The warmth is extracted from
gaseous water, vapor forms first, then water and then ice. |
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Heat Transfer
| Every substance consists of a mass of moving molecules. The
fast moving molecules of a warmer substance give off some of
their energy to the cooler and thus slower molecules. As a
result, the molecular motion of the warmer substance slows down
and that of the colder substance is accelerated. This process
continues until the molecules of both substances are moving at
the same speed. They are then at the same temperature and no
further heat exchange takes place. |
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The boiling point given in tables for a liquid is always
referenced to an atmospheric pressure of 1 bar (14.5 psi). If
the pressure acting on a fluid changes, its boi ...
Other materials:
Locking and unlocking the vehicle from the outside
Fig. 23 Buttons on the vehicle key
Fig. 24 Mechanical vehicle key
First read and observe the introductory information
and safety warnings
Function
Buttons to be used in the vehicle key
Action to be followed with key in the lock cylinder or
Unlockin ...
A/C Refrigerant Low Pressure Switch -F73
Note
For switching pressures, removing and installing switches
and switch arrangement and version, see vehicle-specific
refrigerant circuit.
Refer to
→ Rep. Gr.87.
...
Light Alloy Wheels, Care and Maintenance
To maintain the decorative appearance of light alloy wheels
for a long time, regular care is necessary.
In particular, road salt and dust from brake abrasion must
be thoroughly washed off every two weeks. Otherwise, the paint
of the ligh ...
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Pressure and Boiling Point