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What is a population's age structure? give an example

1 answer:

8 0

Population age structure is a summary of the number of individuals of each age in the population. An example is, In 2002, 30% of the worlds population was under 15 years old. <span />

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The runner below has a mass of 55 kg and is moving at 3.87 m/s. what is his kinetic energy in joules

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

$k = \frac{1}{2} m {v}^{2} \\$

m is the mass

v is the velocity

From the question we have

$k = \frac{1}{2} \times 55 \times {3.87}^{2} \\ = 27.5 \times 14.9769 \\ = 411.86475$

We have the final answer as

Hope this helps you

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