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Ksenya-84 [330]

3 years ago

11

Advances in medical technology and healthcare have increased the life expectancy of people around the world. What negative effec

t has this also influenced?
A. War
B. Pollution
C. Overpopulation
D. Crime

1 answer:

White raven [17]3 years ago

3 0

The answer is C. Overpopulation.
Because life expectancy has increased, the number of people that are alive on Earth at one time has also increased. In many regions of the world, more babies are being born than the number of people dying, causing the populations to grow, and as populations increase, the risk of overpopulation becomes feasible.

Hope this helps! :)

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AleksAgata [21]

Answer:

The surface-to-volume ratio of a C-60 fullerene is 3:77.

Explanation:

Surface area of sphere = $S=4\pi r^2$

Volume of the sphere = $V=\frac{4}{3}\pi r^3$

where : r = radius of the sphere

Radius of the C-60 fullerene sphere = r = 77 pm

Surface area of the C-60 fullerene = $S=4\pi (77 pm)^2$ ...[1]

Volume area of the C-60 fullerene = $V=\frac{4}{3}\pi (77 pm)^3$ ..[2]

Dividing [1] by [2]:

$\frac{S}{V}=\frac{4\pi (77 pm)^2}{\frac{4}{3}\pi (77 pm)^3}$

$=\frac{3}{77}$

The surface-to-volume ratio of a C-60 fullerene is 3:77.

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Answer:

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3 years ago

A gaseous fuel mixture stored at 747 mmHg and 298 K contains only methane (CH4) and propane (C3H8). When 11.1 L of this fuel mix

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Answer:

$M_f=38.8\%$

Explanation:

From the question we are told that:

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Generally the equation for ideal gas is mathematically given by

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$n=0.446mol$

Therefore

$x+y=0.446$

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Since

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$x(889) + y(2220) = 760 ...... 2$

Comparing Equation 1 and 2 and solving simultaneously

$x=0.446-y .....1$

$x(889) + y(2220) = 760 ...... 2$

$x=0.173$

$y=0.273$

Therefore

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$M_f=\frac{1.173}{0.446}*100\%$

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2 years ago

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Drupady [299]

Answer:

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6 0

3 years ago