Today's mental teaser

Reply Subscribe

Thread Tools

02-15-2017, 08:14 AM

#21

Zippy

Join Date: Oct 2000

Location: West Deptford NJ

Posts: 9,529

Likes: 78

Received 133 Likes on 85 Posts

Quote:

Originally Posted by boltonblue

As I ponder this further, I don't think altitude matters.( at habitable levels anyways)
the whistle volume is based of the differential of the internal vs external pressures and that is a function of heat input over time.
according to these guys How the kettle got its whistle University of Cambridgeit's the steam's velocity that matters.
the higher the pressure differential, the higher the speed. the tone or pitch itself is fixed by the neck's dimensions.

Without the math, I would say that you are correct, that the pressure differential at boiling will be will be the same both inside and out of the kettle, there should be a difference with respect to the time interval at sea level versus elevation but I believe (but I could be wrong) that difference in pressure at full boil will produce the same tone. That said, I hated thermo, so that might be clouding my aging mind.
Now if I could just find that differential equations book........I am sure that there is an integral for this.