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sammy [17]
3 years ago
5

Name two layers below earth's surface in which convection takes place

Geography
1 answer:
FromTheMoon [43]3 years ago
4 0
The outer core and mantel.
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The distance from Alexandria to Syene is about 500 miles. On the summer solstice the sun is directly overhead at noon in Syene.
svp [43]

Answer:

Earth circumference is 25000 miles

correct option is 25,000 miles

Explanation:

we have given here Alexandria to Syene distance = 500 miles

the sun is 1/50th of the circumference of the sky (about 7°)

as we know that Earth circumference done by astronomer Eratosthenes in 240 B.C

He observe on a particular time of day ( in noon) during the summer solstice

and there was no shadow in Syene in Egypt so  This was verified that the sun must be directly on overhead and not at an angle to the surface of the city at that time

so

In Alexandria he measured the position of sun at the same time and found it to be nearly (1/50)th of a complete circle

it would be 7.2 degree (when we do \frac{360}{50} = 7.2)

so 2 reference points being 2 cities for the sun

all measure circumference =  the distance between these two cities × 50  

and we have given 500 miles

so

Earth circumference = 500 × 50

Earth circumference is 25000 miles

correct option is 25,000 miles

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3 years ago
As the speed and length of a wave decreases, the wave _____.
jek_recluse [69]

The  speed of a wave measures how far one particular crest (or trough) moves in a given amount of time. The speed of the wave changes according to the following equation:

v  =  λ * f

According this equation, it follows that as the speed and length of a wave decreases, the wave grows higher (the higher the frequency).

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3 years ago
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True or false: geography is not a factor in assessing community risk.
natita [175]
I believe the answer is True
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How do y'all no the question
Artemon [7]
I smart me guess idk
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Aquaculture and fish farming can create environmental problems because they __________.
Burka [1]

Answer:

B. change natural marine life habitats.

Explanation:

Aquaculture or aquaculture is the set of activities, techniques and knowledge of breeding aquatic plant and animal species. It is an important economic activity of food production, raw materials for industrial and pharmaceutical use, and living organisms for repopulation or ornamentation. The farming systems are very diverse, from freshwater or seawater, and from cultivation directly in the environment to installations under fully controlled conditions. The most common crops correspond to planktonic organisms (microalgae7 and Artemia), macroalgae, molluscs and crustaceans, the professionals in charge of this work are Fisheries Engineers, Zootechnicians, Aquatic Engineers and Marine Biologists.

Fish farming is the breeding of fish, a term used to group a great diversity of crops that are very different from each other, generally denominated according to the species or the family. The facilities of industrial fish farming are known as fish farms, although this is a term in disuse, due to the diversification that has suffered the crop, in tanks, ponds, floating cages, etc. The most produced species worldwide are carp, salmon, tilapia and catfish.

brainliest plz

8 0
3 years ago
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