The pressure exerted by a person's lungs can be measured by having the person blow as hard as possible into one side of a manometer produces a 70-cm difference in the heights of the columns of water in the manometer arms, what is the lung pressure?

Explanation:

Given that:

We have:

density of water,

As we know that pressure in terms of liquid column is given as:

is the pressure created by blowing through the lungs.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.