- #1
emzy168
- 4
- 1
- Homework Statement
- We can feel that as we blow up the balloon, the pressure inside it stays more or less constant; this is due to the elastic properties of the rubber sheet. Therefore, when released, the air will exit the balloon at a constant velocity. To test this idea, a round balloon was inflated with the aperture pinched shut between thumb and finger. Then air was let out in bursts by releasing the aperture, and the following data recorded for how the diameter varied with time:
Time (s) Circumference (cm)
0 72.5
1 65.5
2 57
3 44.5
4 30.5
4-5 minimum
Estimate the volumetric flowrate of the air leaving the balloon, and thus the average speed of the exiting air (assume the aperture has diameter 1 cm).
What is this speed on the Beaufort Scale, and is this reasonable?
- Relevant Equations
- Possibly Q = Av or some rate of change equation
I'm really not sure how to start this one!