Air Pressure in a Balloon

Try this

Using the Barometer tool, place the smartphone inside of a spherical translucent latex balloon. (Alternatively, us an app such as Airmore to display Physics Toolbox on your computer via a bluetooth connection). Inflate the balloon, and periodically measure the radius of the spherical balloon using a meter stick.

Challenge yourself

• Create a graph of Pressure versus Radius. and derive a mathematical expression to model the relationship.
• If there are any constants in these mathematical expressions, explain their significance.