240 km h is something in mph
KMH to MPH conversion
The earth is in motion. It revolves around itself and around the sun. The universe is also moving around the sun and the universe is also in orbit. Hence the only thing that is constant about life is movement. When we take this logic of movement forward we come to the world of time and distance. It is about calculating the distance traveled over a period of time. Distance is covered measured by certain time-tested methods and the most common terms used are miles, kilometers and so on. While we use them quite regularly, we need to know what exactly the history is behind this. Hence we will try and spend some time knowing more about the origins of the various measuring yardsticks as far as time and distance are concerned.
Some basic definitions
When we talk about a mile or a kilometer we are basically referring the distance that one is able to cover within a specified time of one hour. Hence if we are riding a bike which travels at 60 mph we are referring to the fact that in one hour the bike would be able to cover 60 miles and perhaps 120 miles in two hours if it travels at the same speed. Apart from miles, kilometer is also used commonly. 1 kilometer is equal to 0.6213 miles and this method of time and distance is also used. On the other hand one mile is equal to 1,609 kilometers. However, in most American and European nations, people are more aware of mile rather than kilometers. The modern abbreviation for mile is mi and this has been brought in to avoid confusion when one refers to metric meter which has an abbreviation of m. However, it would be pertinent to mention that mil is still not very widely used and majority is still comfortable using either miles or mph.
A Look At The History
It would be pertinent to mention here that when we talk about miles per hour or MPH we are referring to a unit of speed which uses the imperial system of units. As mentioned above, this is commonly used in countries like the United Kingdom and the USA. Not so long ago it also was used in all the other major English speaking nations of the world including nations such as South Africa, New Zealand, Australia and Canada. However, as time passed on the imperial system was replaced with the metric system in most of the above countries. This could have happened sometime during the second half of the twentieth century. Today in most of these countries, except perhaps a few, whenever speed and distances are measured in imperial systems, they take the trouble to convert it into metric system of calculating speed vis-à-vis distance covered.
When Did It Start Being Used
It would be pertinent to mention here that miles per house perhaps came into existence and was used during the 18th century. It was used to measure the speed with which regular stage coaches traveled. This was done because running over long distances in stages required following a reasonably accurate timetable. To make this possible it was decided to make use of the miles per hour to calculate the time taken by these rail coaches to travel from one city / town to another city / town. This made the job of coming out with time table that much easier and simpler. With the advent of roads during the early 19th century speeds increased quite significantly. However, there were quite a few myths surrounding speeds at which human beings could travel. There was a huge fear amongst people that traveling beyond 20 mph could lead to suffocation and asphyxiation. However, with civilization and with better knowledge and information this myth was dispelled. Soon there were trains which were traveling at around 50 miles per hour and passengers not only survived this speed but they also enjoyed it quite a bit.
Habits And Myths Took Time To Change
The myth about speed and human endurance took some time die down. Even during the early 20th century, there was widespread fear of mechanic vehicles exceeding the speed threshold. The introduction of automobile speed limits saw highly restrictive practices coming into practice in many countries. In the United Kingdom for example, automobiles were not allowed to exceed 4 miles per hour for many years. Hence the evaluation of mile and kilometer has been quite interesting and even choppy at times.
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