Question

If, as is typical, each of them breathes about 500 cm3cm3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? Assume the typical respiratory rate for a healthy adult at rest is 15 breaths per minute. If, as is typical, each of them breathes about 500 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? Assume the typical respiratory rate for a healthy adult at rest is 15 breaths per minute.
a) 1×108m31×108m3
b) 3×103m33×103m3
c) 1×104m31×104m3
d) 1×1010m31×1010m3

Answer 1

Answer:

b) 3x10³m³

Explanation:

The volume of each astronaut breathing in m³ is:

500cm³ * (1x10⁻⁶m³ / 1cm³) = 5x10⁻⁴m³

In 1 minute, the volume is:

5x10⁻⁴m³ * 15 = 7.5x10⁻³m³

In 1 hour:

7.5x10⁻³m³ /min  * (60min / 1 hour) = 0.45m³/h

In 1 day:

0.45m³/h * (24h / 1 day) = 10.8m³/day

In 1 year:

10.8m³/day * (365 days / 1 year) = 3942m³ = 3.9x10³m³

That is approximately:

b) 3x10³m³