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The Quartz Halogen cycle - keeps the tungsten reprecipitating on the filament and not the envelope, so it can stay hotter without the envelope going black.
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Yes. If you ran a normal tungsten filament bulb as hot as a halogen, the filament would evaporate away very quickly and the bulb would die. The halogen gas prevents the tungsten filament from evaporating away, so you can use a much higher temperature, and it will still last two or three times longer than a normal bulb.
A well-constructed question will lead to the correct answer.
The "one I was looking for" should not be part of any half-decent quiz, imho.
It's what they've got in common.
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Yes. JohnD was first but you gave further explanation.
So, who gets the next question?
Good point.
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3 play for England 1 plays for Norway.
Most would be more than happy for Haaland to represent his country of birth.
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Your go John.
In captivity, can be recognised by its relatively short legs, muscular build, and absence of facial "tear lines".
And the nice engines.
They like water.
Well yes but not quite what I had in mind
John d is on the money
Afaik they can even eat ?? Under water ????
He got a hot poker up his jacksie.
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Is John, an old and very jealous carpenter, involved? Who could that possibly be?
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