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# SCUBA DIVE!

By: Michael Alexander Leos
by

## Alex Leos

on 14 April 2010

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#### Transcript of SCUBA DIVE!

SCUBA DIVE! 1. To determine what volume of air is required to make a dive for 30 minutes I chose jogging on a treadmill to substitute for exercise during swimming. I timed my running for 5 minutes.While my heart rate was still increased I calculated how many breaths I used to fill a beach ball which was 16 inches in diameter.I calculated the volume of the beach ball to show me how much air was used for one minute. I then multiplied that number by 30 to get the total amount of air and breaths needed for a 30 minute dive.I also know that the air tank can only hold 3319.5cm^3 of air so I used Boyle's law to find what pressure was needed for the amount of air needed to be held by the tank. 2. I found the total volume of air required for a 30 minute dive to be 316,101cm^3.
The circumference of the beach ball is 85.7 cm. I multiplied this number by .5, then divided by pi and got a radius of 13.6 cm.

Then i put the radius of the beach ball in to the volume of a sphere formula, and calculated the volume to 10,536.7 cm^3.

I counted 45 breaths to fill up the entire beach ball witch means each breath was about 215 cm^3.

In one minute I filled the beach ball with 45 breaths. I multiplied this number by 30 to find how much air we would need for the entire 30 minutes, and got about 315,500 cm^3.

If I take 45 breaths in one minute, I would take about 1350 breaths in 30 minutes. 3. I used Boyles' Gas Law for my Experiment I will be using is Boyles' Law to find out the amount of pressure tank be will under. The Law is
P1/V1=P2/V2. Trial 1:
Running Time in minutes- 5:00
Heart rate per minute- 60
Circumference- 85.7cm
Volume- 10536.7 cm^3
Breaths- 45 breaths
Breathing Time- 1 minute

Trial 2:
Running time in minutes- 5:00
Heart Rate per minute- 63
Circumference- 85.7cm