Achilles and the tortoise 
immagine da utenti.quipo.it
In una società come la nostra, dove l'apparenza è padrona, si tende spesso a manipolare le informazioni per far apparire le cose diverse da quello che sono. Ad esempio una della grandi ability of modern communications is to outsource certain costs to make ends meet.
How much does a gallon of gasoline? yes, ok, that's the price we pay at the gas station. But how much of our taxes is used to treat health ailments due to pollution that produce that liter of fuel burning? And how to keep an army in the so-called peacekeeping missions as it happens right where we are the largest oil fields?
If we could calculate all the costs associated with that gallon of gasoline would find very different results!
Likewise, you can make some interesting calculations by other views. For example, on my old physics book when I was in school we read that the speed is given by the distance traveled divided by time:
Space / Time = Speed \u200b\u200b
So if you want to calculate my speed on a road trip of 180 miles, then take note that I do There are, for example, two hours and then it turns out that my average speed is 90 mph. In fact, 180 / 2 = 90
And if I calculate my average speed over a whole year? How fast I walked, on average, 10,000 km, which normally do with my car every year? To do that I should keep count of the total time it took to cover them.
And if I calculate my average speed over the 10 years of living in my car? Likewise I have to note the mileage and all the time I have to pass through.
So far so good, but now also in tiriamoci "externalized costs", which in this case are the times that would normally not be calculated, and arrive at surprising results:
suppose to come to terms with respect to car Small, one to buy it costs say € 10,000 all inclusive. Since a car is small we assume that his life is 10 years during which travel along 100,000 miles, you pay 70 € and 400 € a year stamp duty insurance, and 4700 € in 10 years. Also imagine that costs on average € 50 per year oil changes and other routine maintenance and extraordinary maintenance of 100 euro per year, ie 1500 € in 10 years. Finally add in the course of 100,000 miles of life, a couple of tire changes, say € 600 in all.
also assume that traveled 17 miles per gallon and gasoline costs 1.4 € per liter. The 8235 will cost € 100,000 km total.
In total this car in 10 years to travel 100,000 km, it costs € 25,035, ie € 0.2504 to Km
Now calculate how much time you have to work to earn that amount. Assume a net salary of € 1700 per month, ie € 9.8266 per hour, ie € 0.1638 per minute.
It follows that for owning the car and drive necessary to work 100,000 km 152,862 minutes, or that you have to work for 1 minute and 31 seconds to travel 1 km
So when you travel by car, if you want to do the exact account of speed, in addition to time spent on travel time for each km is necessary to add 1 minute and 31 seconds, or the 91 seconds that we had to work to allow our trip could take place.
So for example if you travel at 50 km / h we have, for 72 seconds, measured from the time to walk miles each, add 91 more, and this brings us to the actual speed at 22 km / h
Amazing, is not it? The result is a rate similar to that obtained by bike!
But even more amazing when you notice you are traveling faster: at 120 km / h takes just 30 seconds to one kilometer, which added to the usual 91 to bring the actual speed of 30 km / h. It is obviously faster than before, but in proportion is even worse!
changing the initial data it turns out that a car is more expensive than "slow", for example if it costs rather than cost € 30,000 then 10,000, equal to other input data, the 50 km / h becoming little more that 15 and 120 do not reach 19.
course, to make a proper comparison, a similar account should be done by bicycle. In fact this one has a purchase price, for a period of years tot, maintenance costs and change tires, but for a bike apparent speed of 20 km / h corresponds to an actual speed of 19.5, ie the cost being very modest little influence.
We have often found that in cities the bicycle is the fastest car, but with calculations that we just made it clear that even on the highway, well, no, the highway is still the car to be faster, but only very little!
So who is going really fast in your car? Well, first of all those who do not have to pay the costs, ie the passengers! Only for them the speed is the real one.
And to complete the comparison we make one last calculated how fast the train? For example
to go to Turin to Ivrea, 60 km, the train takes an hour right there. Since the ticket costs € 4:40 means you have to add 27 more minutes of work, and then the actual speed drops to 41 km / h. This is an excellent result: the train is the fastest car, especially if we consider that the income of the car we have not entered the highway cost in recent times, just for the stretch from Turin to Ivrea, it costs about 4.50 €, that is, as the train ticket!
So here that these calculations give us another good reason to increase the mass transport o per andare in bicicletta!
Non siete convinti dei conti? Rifateli voi stessi, inserendo i vostri dati, e non avrete più dubbi!
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