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svetoff [14.1K]
3 years ago
6

Which of the following materials is the least porous? loosely packed gravel sorted sand and rock unsorted sand and rock large pe

bbles and boulders
Geography
2 answers:
liraira [26]3 years ago
8 0

The answer is The unsorted sand and rock is the least porous. The porousness of a solid material is dependent on the size of holes within it. This can be tested by how quickly, the material can pass a liquid through it. The bigger the holes, the higher the porousness, In this case, the unsorted sand and rock have the smallest holes between its particles.

motikmotik3 years ago
7 0
<span>It is asked in this problem to determine which of the combination of materials is the least porous among all. Porosity is the ratio of the volume of pores or voids present per volume of the total mixture. Loosely packed gravel translaes to porous property already while big rocks can also employ large gaps in between. answer then is B. </span>
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These sentences describe conditions after the fall of the Roman and Gupta EmpiresMatch each description to the correct empire
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Answer: Roman Empire:

Powerful Lords Broke up the empire into separate kingdoms.

Without trade, people had to find their own food and basic necessities.

Knowledge of math and science was lost

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Invaders destroyed Hindu temples.

The feudal system began as people turned to lords for protection.

Explanation for Roman Empire. Trade in Rome ceased because all of the roads were in such horrible condition that people could not travel on them. Rome had advanced  knowledge of math and science but all their notes on them were mostly destroyed or lost. Rome was divided into two parts the western and eastern kingdoms.

Explanation for Gupta Empire. Hunas began invading Gupta, (Gupta Empire was strongly and mainly Hinduism) they destroyed hindu temples and took control over the Gupta empire and were absorbed into their local culture. The Gupta empire took to feudalism in order to gain protection from foreign invasion.

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