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The invention of the railroad generally hastened the construction of new roads and canals. Railroads provided a faster and more efficient means of transportation, which increased demand for improved infrastructure to support both rail and road networks. As railroads expanded, they often complemented existing canals and roads, leading to enhancements in overall transportation systems to facilitate trade and travel. Additionally, the success of railroads prompted investments in other forms of transportation, creating a more interconnected infrastructure.

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5d ago

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Why inert gas use for welding?

Inert gases are use for welding is because in the welding process, the heat will actually hasten up the process of oxidation(rusting) happening on metals. Oxidation process(rusting) requires oxygen, thus, by using inert gas, it will purge the surrounding of oxygen preventing the oxidation process from happening.


How do microwaves disperse during path loss between communication towers?

Because of the wave nature of electromagnetic waves, it's impossible to radiatethem from a 'launching structure' that has finite dimensions, and expect themnot to spread wider as they proceed over a great distance. So we must pictureany electromagnetic transmission ... whether it's light, radio, radar, microwave,X-ray, etc. ... as a cone of energy as it proceeds from the transmitter, beginningwith a small cross-section as it leaves the launcher, and growing wider and wideras it proceeds.Realizing this, we now have a constant, fixed amount of power, propagatingacross a surface area that gets bigger and bigger as we move farther andfarther from the source. So for a receiving antenna of any given size, it makessense that the farther the receiver is from the source, the less signal powerit's able to intercept, since that power is spread over a progressively largerarea as the distance increases.People will also hasten to mention that there are many things all around inthe natural environment that absorb power from the signal, such as trees,buildings, atmosphere, rain, clouds, soil, etc. They are correct, but these lossesare only a very small part of the weakening of microwave signals with distance.By far the greatest factor is the geometric spreading with distance, describedabove.