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Minor Versionm

by Procheta Mallik

Introduction

Using a polythene roll, about 2m long, one ties a knot to one end and seals it thus. Blowing into what is now a long polythene bag through the other end, one can inflate the bag and estimate/measure one's lung capacity

Tools

Parts

  1. Take a thin Polythene Bag of  5  feet in length.
    • Take a thin Polythene Bag of 5 feet in length.

    • Tie a rigid knot at one end of the Polythene bag to seal it.

    • "Closed" end.

    • "Open" end.

    vishal:

    Redo the whole thing.

    (1) Steps need to be broken.

    (2) Photos are not useful.

    (3) For this tactivity, it's not relevant to blow from distance. The objective is not to explain bernoulli's principle. Objective is to measure lung capacity.

    (4) You need to show how to measure.

    Procheta Mallik - Reply

  2. Place the open end of the bag around your mouth in such a way that air won't escape when you blow.
    • Place the open end of the bag around your mouth in such a way that air won't escape when you blow.

    • Now, Take a deep Breath and blow into the bag at one go

    • With hand, Twist and close the "open" end of the bag as soon as you blew into it.

    • Squeeze the bag from "Open" end towards "Closed" end so that the air fills up and occupies the volume of the bag properly.

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    • Use a table, if you can. It will be much easier to take measurements.

    • Measure the air filled portion of the bag against a 1 L plastic bottle.

    • Mark the position of bottle with a marker and move the bottle over to the marked position to continue with the measurement process.

    • Measure till end of air filled portion of the bag

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    • Add the volume of the bottle you needed for the measurement process and you will arrive at approximated Capacity/Volume of your lungs!

    • For the case illustrated here : 1 L + 1 L + 0.8 L = 2.8 Litre approximately

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    • Letting air escape when you blow into the bag - Hold the bag tightly to your mouth.

    • Failure to secure the "open" end of the bag immediately after blowing into it.

    • Not Squeezing the bag before taking measurements.

    • Loose knot at "closed" end.

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    • Collect a sample from another person . Measure and compare the results to arrive at whose lungs are healthier!

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Finish Line

Kailash NR

Member since: 05/02/2017

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