Answer:
Metal that has not yet been refined.
Explanation:
The mining companies are companies that are involved in the extraction of natural resources from the crust. They can operate on land or in water. The extraction of natural resources involves numerous things, such as oil, natural gas, and metals.
When it comes to the extraction of metals, the term that is used is ore. Ore refers to the metal that has still not been refined, or rather it is in its natural form and is not useable without manufacturing it. The extraction of ore is among the biggest businesses in the world, and many countries in the world have it as the number one or one of the top economic contributors.
Increased urbanization and congestion make logistics far less predictable and harder to manage. ... At the same time, transportation and delivery can contribute to pollution and gridlock, and can be challenging for companies both large and small to manage sustainably.
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value.[1] It is a cross-section of the three-dimensional graph of the function f(x, y) parallel to the x, y plane. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level.[2] A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes.[3] The contour interval of a contour map is the difference in elevation between successive contour lines.[4]
More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. The gradient of the function is always perpendicular to the contour lines. When the lines are close together the magnitude of the gradient is large: the variation is steep. A level set is a generalization of a contour line for functions of any number of variables.
Contour lines are curved, straight or a mixture of both lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on a visible three-dimensional model of the surface, as when a photogrammetrist viewing a stereo-model plots elevation contours, or interpolated from estimated surface elevations, as when a computer program threads contours through a network of observation points of area centroids. In the latter case, the method ofinterpolation affects the reliability of individual isolines and their portrayal of slope, pits and peaks.<span>[5]</span>
Explanation:
from ground where they have connected the tube there we will get the water
