x Turn on thread page Beta
 You are Here: Home >< Physics

What is the relationship between the angular speed and the diameter of a vortex? watch

1. In a water vortex formed in a plastic bottle, what is the relationship between the angular speed of the water and the diameter of the hole in the cap? I would have expected that according to the conservation of angular momentum, the smaller the hole the faster the water speed (L = r x p). However, I've been trying to test this relationship out but seem to get that the larger the hole the faster the water goes.
2. (Original post by gianamar)
In a water vortex formed in a plastic bottle, what is the relationship between the angular speed of the water and the diameter of the hole in the cap? I would have expected that according to the conservation of angular momentum, the smaller the hole the faster the water speed (L = r x p). However, I've been trying to test this relationship out but seem to get that the larger the hole the faster the water goes.
Does this help?
http://www.exploratorium.edu/learnin...tex/index.html
3. Thanks for the link My investigation is looking particularly at how the water speed varies with the diameter of the hole in the stopper, but the link should be helpful anyway - thanks

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: September 23, 2014
Today on TSR

'All unis should close except Oxbridge & RG'

What do you think?

Should I fight a topless girl for my BF?

Discussions on TSR

• Latest
Poll
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE