UBC PHAS Demonstration Room Catalog

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====== Pressure-tension Equilibrium Balloons ======

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===== Description =====

Challenge students with this pressure vs tension demonstration!


Equilibrium, air pressure, tension  





===== Purpose =====


To demonstrate equilibrium and the effects of tension in a balloon on the air pressure inside  



===== Apparatus =====


Stand with valves and balloons
Bicycle pump  



===== Setup =====


Attach bicycle pump valve to the stand valves and pump air into the balloons as shown in the images below
Remove the bicycle pump valve and the air will remain in the balloons
Open the center valve and observe what happens



===== Notes =====


Ensure center valve is closed before pumping air into the balloons
Replace balloons if they are damaged or too elastic. 
If you inflate one balloon past a certain large volume the tension will decrease enough such that the opposite effect is observed.  The bicycle pump can be found with the carts near the elevator   

Updated on: Jan 17 2017

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<WRAP centeralign> // Demo room information // 
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| **Location** | ---- |
| **Maker** | Unknown |
| **Current State** | Working |
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UBC PHAS Demonstration Room Catalog

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