When caused by humans, acid rain is most commonly a byproduct of intense air pollution. As pollutants are pumped into the atmosphere, the particles rise up to the point where water can condense around them thereby forming water vapor and rain drops; however, those rain drops are closely intertwined with the pollutants thereby giving them an acidic nature.
Answer: Ulaanbaatar - Capital of Mongolia.
Explanation: Soviet-era buildings, museums within surviving monasteries, and a vibrant conjunction of traditional and 21st-century lifestyles typify the modern city.
The map of the United States that is representing the soil erosion, shows us a trend that the soil erosion is the biggest in the areas where there is the most agricultural activity in the country, mostly the Midwest, the southern part, and the lowlands east of the Appalachians.
It is no wonder that the areas where there is the highest agricultural activity have the highest wind and water erosion. What is now agricultural land, in the past had a natural protection of wild plants, but now it doesn't.
The constant plowing of the soil results in making the soil much more loose several times in a year, sot he wind is able to pick up particles easily, and the water is able to easily move the top layers.
The heavy usage of pesticides, herbicides, fungicides, and artificial fertilizers are also making the soil very loos, so the erosion has big effect.
Depending on the irrigation method, it can have a big effect, especially if it is irrigation through ditches, as the water will be pushing from one side and moving toward the other side, moving the top soil with it.
Answer: C. Y and Z
Explanation:
First, it is necessary to understand the concept of escape velocity.
The <u>escape velocity</u> is the <em>minimum speed with which any object needs to be launched to move indefinitely away from a more massive body or system to which only the gravitational force links it.
</em>
In this sense, each planet and body of the solar system has an escape velocity with which if an object is launched, it can escape the gravitational attraction of that planet. In the case of Earth it is approximately 
.
Hence, from the given options, the objects whose speeds are closer to 
are Y and Z.
