Question

The faintest sound an ear can hear (20 micro-pascals) is roughly ______ times smaller than atmospheric pressure at sea level.

Answer 1

Answer:
`5.06*10^(9)`

At sea level, there is one standard atmospheric pressure which is equal to 101.325 kilopascals.

The pressure of faintest sound that a human ear can hear is 20 micro-pascals.

taking the ratio of two:

`\frac {101.325 kilopascals. }{20 micropascals} = \frac {101.325 * 10^(3)Pa}{20 * 10^(-6)Pa}`

`=5.06*10^(9)`

Hence, the atmospheric pressure at sea level is
`5.06*10^(9)` times greater than the faintest sound that a human ear can hear.