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3 years ago

In which continents are these positions? a) 20°N; 10°W b) 50°N; 10°E c) 20°S; 50°W d) 40°N; 100°E.......please help

Geography

1 answer:

AURORKA [14]3 years ago

5 0

Answer:

a) Chinguetti, Mauritania in the continent Africa

b) Germany in the continent Europe

c) Brazil in the continent South America

d) Alxa Right Banner, Alxa League, Inner Mongolia, China in the continent Asia

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3 years ago

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A metal sphere of radius 9 is melted and transformed into three identical spheres. b What is the ratio of the area of one of the

Romashka [77]

Answer:

25:52 the ratio of the area of one of these spheres to the area of the original sphere.

Explanation:

Radius of metal sphere ,R= 9

Volume of metallic sphere, V = $\frac{4}{3}\pi R^3$

Radius of small metal sphere = r

Volume of small sphere made form metal sphere = v

$v=\frac{4}{3}\pi r^3$

Volume of metallic sphere = Total volume of all 3 small spheres

V = 3v

$\frac{4}{3}\p R^3=3\times \frac{4}{3}\p r^3$

$R=\sqrt[3]{3}r$

Area of sphere = $4\pi (radius)^2$

Area of metal sphere = $A=4\pi R^2$

Area of small metal sphere = $A'=4\pi r^2$

The ratio of the area of small spheres to the area of the original sphere:

$\frac{A'}{A}=\frac{4\pi r^2}{4\pi R^2}=\frac{r^2}{R^2}$

$=\frac{r^2}{(\sqrt[3]{3}r)^2}=\frac{1}{(\sqrt[3]{3})^2}=\frac{1}{2.08}=\frac{25}{52}$

25:52 the ratio of the area of one of these spheres to the area of the original sphere.

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4 years ago

Which process is a form of mechanical weathering?

stealth61 [152]

Explanation:

Mechanical Weathering Mechanical weathering, also called physical weathering and disaggregation, causes rocks to crumble. Water, in either liquid or solid form, is often a key agent of mechanical weathering. For instance, liquid water can seep into cracks and crevices in rock.

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1 year ago

In which continents are these positions? a) 20°N; 10°W b) 50°N; 10°E c) 20°S; 50°W d) 40°N; 100°E.......please help​

In which continents are these positions? a) 20°N; 10°W b) 50°N; 10°E c) 20°S; 50°W d) 40°N; 100°E.......please help