4 years ago

Quickly!!What factors have led to increase in life expectancy around the world?

1 answer:

4 0

Many factors have contributed to increase in life expectancy. Examples such as medical advancements in modern medicine, less wars being fought, improvement in sanitation, eating a healthy diet, a overall healthier lifestyle (for example, people don’t smoke cigarettes as much as the olden days) and easier access to education.

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At what distance from the sun is the intensity of sunlight nine times the value at the earth? (the average earth–sun separation

padilas [110]

Sunlight is type of EM wave. The intensity of EM follows inverse square law.
$\frac{1}{ n^{2} }$
This means that the intensity at a distance that is n times greater will be n^2 times smaller.
Now we set this equation to be equal to 9 and we solve it for n:
$9= \frac{1}{ n^{2} } \\ \\ 9 n^{2} =1 \\ \\ n^{2} = \frac{1}{9} \\ \\ n= \frac{1}{3}$

The intensity is 9 times greater at a distance that is equal to a 1/3 of Earth's distance:
$\frac{1}{3} *1.496* 10^{11} m=4.99* 10^{10} m$

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4 years ago

Identify the element formed when carbon-14 (14C) undergoes radioactive decay. [1]

Slav-nsk [51]

After studying the information you have given in the photograph, the element that will be formed when carbon-14 (14C) undergoes radioactive decay is nitrogen-14. You can also write it as just nitrogen. Either way is acceptable.

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3 years ago

This sector uses the most water in Western Europe.

Verdich [7]

Euroupean enviorment agency

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4 years ago

1/5 of Brazil rainforest has been destroyed, an area the size of what state.

AVprozaik [17]

Answer:

Israel

Explanation: