Cars - Costs and benefits
The costs of car usage, which may include the cost of: acquiring the vehicle, repairs and auto maintenance, fuel, depreciation, driving time, parking fees, taxes, and insurance,5 are weighed against the cost of the alternatives, and the value of the benefits ? perceived and real ? of vehicle usage. The benefits may include on-demand transportation, mobility, independence and convenience.7 During the 1920s, cars had another benefit: "couples finally had a way to head off on unchaperoned dates, plus they had a private space to snuggle up close at the end of the night."48
Similarly the costs to society of encompassing car use, which may include those of: maintaining roads, land use, air pollution, road congestion, public health, health care, and of disposing of the vehicle at the end of its life, can be balanced against the value of the benefits to society that car use generates. The societal benefits may include: economy benefits, such as job and wealth creation, of car production and maintenance, transportation provision, society wellbeing derived from leisure and travel opportunities, and revenue generation from the tax opportunities. The ability for humans to move flexibly from place to place has far-reaching implications for the nature of societies.8
There are several possible ways
There are several possible ways to classify internal combustion engines.
By number of strokes
Clerk Cycle 1879 6
Four-stroke engine (Otto cycle)
By type of ignition
Spark-ignition engine (commonly found as gasoline engines)
By mechanical/thermodynamical cycle (these 2 cycles do not encompass all reciprocating engines, and are infrequently used):
The following jet engine types are also gas turbines types:
As car dealers cheat?
Used cars are mostly purchased vehicles. Associated with them, however, a certain risk. Although a large part of the parameters of the vehicle is in the documents attached to the car, there are also such parameters, which often indicate the actual state of the car, but still are often counterfeited by selling such cars. One of the most important parameters to which we should pay attention when buying a used car is the amount of kilometers driven by it. Many retailers indulges in illegal manipulations in this area, and then sold their equipment is in much worse condition than shown in the offer.