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egoroff_w [7]
3 years ago
6

A straight line with a negative slope on a velocity-time graph indicates which of the following?

Physics
1 answer:
podryga [215]3 years ago
5 0

Answer:

A

Explanation:

Straight line with a negative slope

On a velocity_time graph

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Answer:

A) if each astronaut breathes about 500 cm³, the total volume of air breathed in a year is 14716.8m³.

B) The Diameter of this spherical space station should be 30.4m

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The breathing frequency (according to Rochester encyclopedia) is about 12-16 breath per minute. if we take the mean value (14 breath per minute), we can estimate the total breaths of a person along a year:

f_b=14\frac{br}{min} \cdot \frac{60min}{1hr} \frac{24hr}{1day}\frac{365day}{1year}=29433600\frac{br}{year}

If we multiply this for the number of people in the station and the volume each breath needs, we obtain the volume breathed in a year.

The volume of a sphere is:

V_{sph}=\frac{4\pi}{3}r^3

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D=2r=2\sqrt[3]{\frac{3V_{sph}}{4\pi}} =30.4m

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