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Re: [Phys-l] Ionization type smoke detectors.

too cryptic; slowed or stopped would involve transfer of energy to the particle likely resulting in further ionization increasing the current instead of a decrease. The e attachment is the dominant effect evidently. Not incidentally, this corroborates the previous descriptions, as the attached es are still ions, just slower (less mobile).

Fixed (permanently installed) unvented heaters are illegal in CA. We have a disconnected one in our century old house along w/ ancient, but vented floor heaters. Someone removed the pilots and added a thermostat controlled valve. When I crawl under the house to lite and unlite the new pilots, I think the old manual system was better.

I don't think it's intentionally designed -- either the flame speed is increased w/ reduced O2 or increased CO / CO2, or, more likely, insufficient O2 requires the combustion to occur later after the kerosene vapour has risen above the wick and mixed w/ more atmosphere. I never noticed any physio. effect. Probably the flame is much more sensitive to depleted atmosphere than I, laudate deum.


Brian Whatcott wrote:

At 11:36 AM 9/28/2006, you wrote:
... stopping the Alphas would have the
opposite of the intended effect, a "proof" of his explanation.

Alphas are stopped in large carbon particles - Oh, all right,
greatly slowed?

... I discovered a very curious effect when I lived in an

old flat in a depressed part of England. I would use a liquid paraffin
heater when I ran out of coal. /// I discovered the heater would
flame out after a time. /// I suspect if the heater was not self extinguishing w/
low O2 supply, I wouldn't be writing this.

Kerosene unvented heaters are on sale at most hardwares in the US.
The makers apparently take care to minimize the lethal CO production
(boasting of "blue flame") and the CO2 production is physiologically
observable - unlike the O2 depletion. This might be a factor in
BC's survival.

Brian Whatcott Altus OK Eureka!

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