Underground coal mining is more dangerous and labor extensive compared to strip mining, so it is also more expensive.
The process of removing coal from the earth is known as mining. Because of its high energy content, coal has been utilized extensively to produce electricity since the 1880s. Coal is used as a fuel in the steel and cement industries to extract iron from iron ore and to make cement.
Environmental concerns have become more significant since 1970, including the health of workers, the degradation of the environment caused by strip mining and mountaintop removal, air pollution, and the impact of coal burning on global warming. By removing the ground above each coal seam, strip mining exposes the coal. The earth that has to be removed is known as "overburden" and is taken out in broad strips.
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Worldwide, the largest percentage of freshwater readily available to humans is stored in _______.
Worldwide, the largest percentage of freshwater readily available to humans is stored in glaciers and ice caps.
What is fresh water?Fresh water is water that is tasteless. The characteristics of the substance contained in freshwater are opposite to salt water. Fresh water does not contain a lot of dissolved salts and mineral solutions in it. Brackish water is a mixture of fresh water and seawater (salt water).
Sources of fresh water come from surface water and groundwater. The largest freshwater stores on earth are in glaciers and ice caps, which are about 68.7% of total fresh water. Then, the second largest freshwater stored on earth is groundwater, which is 39.1% of total freshwater.
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which of the following occurs when the sun, moon, and earth are in alignment (i.e., in opposition or conjunction)?
Whenever the sun, moonlight, and earth are lined up, the tidal ranges are at their greatest.
How do tidal ranges work?The term "tidal range" refers to the height difference between high tide and low tide. The rising and lowering of the tide is frequently accompanied by a horizontal water movement. The values after Morgat correction are: 1.50 - 0.10 Equals 1.40 m of low water. 7.10 - 0.40 ≈ 6.70 m is the high tide.
The significance of tidal range.The seashore is more affected by this phenomenon as the tide range increases. However, the slope of the a beach or even other coastal landform is equally significant since, even in a macro-tidal setting, a steep cliff only offers a minimal difference in the region over which the waves and currents can operate.
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________ describes the range in particle sizes in a detrital sedimentary rock.
A) Sorting B) Cementation C) Size D) Shape
Answer:
sorting
Explanation:
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One dish of Sweden translates into "Sour Herring" and is fermented fish.
O True
O False
Answer:
the answer is 01110100 01110010 01110101 01100101 . do a tiny bit of work decoding it
Explanation:
Which of the following biomes has the highest soil nutrient levels? (a) Tropical rainforest, (b) Temperate rainforest, (c) Boreal forest, (d) Woodland/shrubland, (e) Temperate seasonal forest.
This biome's extremely rapid decomposition is caused by the warm temperature and abundant rainfall, allowing the vegetation to quickly absorb the soil's nutrients and achieve high productivity. Letter (a) is the most appropriate response here.
What do tropical rainforests consist of?The majority of tropical rainforests can be found in the tropics, between 23.5°N (the Tropic of Cancer) and 23.5°S (the Tropic of Capricorn). Central and South America, western and central Africa, western India, Southeast Asia, the island of New Guinea, and Australia all have tropical rainforests.
Which three main tropical rainforests are there?There are three regions of the tropical rainforest: Neotropical (South America and Focal America), African (Africa and Madagascar), and Indo-Malaysian (India, Southeast Asia, Australia and the Pacific Islands).
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Medieval Christian philosophers found problems with which one of the following Aristotelian ideas?
a. The eternity of the universe, the function and existing of the soul, the concept of cause and effect
b. The concept of a finite universe, the relationship between body and soul, the concept of Will and Destiny
c. The concept of an infinite universe (both spatial and temporal), the relationship between body and soul, the concept of action in a distance
d. All these statements are correct
None of these statements is correct
All the above:
The eternity of the universe, The function and the existing of the soul, The concept of cause and effect.
What are the main features of medieval Christian philosophy?Early Christian philosophy, especially in the patristic era, had a tendency to be intuitive and mystical and relies less on reasoning and argumentation. Additionally, it places less emphasis on Aristotle's methodical reasoning and more emphasis on the at times mystical beliefs of Plato.
What is Christian aristotelianism?Aristotle's theory that society develops out of human nature rather than from human vice and corruption was one that Aquinas endorsed. According to him, the state is a naturally occurring institution that comes from the nature of man. Man is a social and political animal by nature, with a predetermined and set aim.
What is Aristotelian method in philosophy?Aristotle uses reasoning and observation in his natural philosophy to draw broad, causal conclusions. Aristotle, for instance, uses the idea of species to support his factual claims about the purposes and behaviors of particular creatures in his biology.
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which of these are characteristics of an artesian well?
A. penetrates an unconfined aquifer
B. requires pumping
C. penetrates a confined aquifer
D. does not require pumping
characteristics of an artesian well are does not require pumping, penetrates a confined aquifer.
What is an artesian aquifer ?Pressurized aquifer intersecting the surface from which water gushes without being pumped. Water table. Top layer of water in an aquifer.
Why does an artesian well flow without pumping?A well that has been dug into an aquifer in a place where the pressure below the ground is high enough for the water to rise inside the well is called an artesian well. Sometimes there is enough pressure for the water to rise from the aquifer to the surface of the ground without the use of a pump.
What does an artesian well require?Simply put, an artesian well is a well that draws water to the surface without the aid of a pump. When the aquifer's positive pressure is high enough, the water rises to the surface. This positive pressure is brought on by an artesian aquifer that is contained between impermeable rocks or clay.
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If earth's total mass is 6 x 1024 kg, calculate the proportion of this lost every year. Show your working and express the answer as a number or percentage.
The proportion of total mass of Earth lost every year is 6 x 10²⁰ kg.
Principle of Uncertainty: -
Uncertainty in the definition of geographic objects is widely discussed among geographers, but is rarely formalized and integrated in geographic analysis. Major issues in geographical analysis are related to uncertainty in ambiguous, heterogeneous or differently applicable definitions of objects and concepts: city, region, continent, frontier, system, etc. Some of these objects can have non-ambiguous and crisp definitions through social conventions (as the limits of most administrative units, when they are not disputed), but many more suffer fundamental uncertainties in their theoretical, as well as practical, definitions. Coombes et al. (1979), for example, highlight the difficulties and the ambiguities inherent in a theoretical and practical definition of urban regions, even when ‘‘objective’’ data like commuter flows are used to identify functional regions.
The more accurate we measure position of the object, the more uncertain the momentum of the object becomes.
The uncertainty in the measurement of the mass of the Earth can be assumed to be (1 x 10⁻² %).
The proportion of the mass mass of Earth lost every year is calculated as follows;
m = (0.01/100) x 6 x 10²⁴ kg
m = 6 x 10²⁰ kg
Thus, the proportion of total mass of Earth lost every year is 6 x 10²⁰ kg.
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