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This is a question Mums

Mrs Liveinabin tells us: My mum told me to eat my vegetables, or I wouldn't get any pudding. I'm 32 and told her I could do what I like. I ate my vegetables. Tell us about mums.

(, Thu 11 Feb 2010, 13:21)
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She may be right (supplemental):
Water quality could also be a factor. Hard water* has a boiling point a couple of degrees higher**, as well as potentially depositing a thermally-insulating mineral layer over the element over time*** so that the thermostat kicks in before enough heat energy is transferred to the liquid.

* Water with a higher concentration of harmless dissolved minerals [eg. calcium (Ca2+), and magnesium (Mg2+) metal cations, and sometimes other dissolved compounds such as bicarbonates and sulfates]
** whatscookingamerica.net/boilpoint.htm
*** Of course, I'm not implying she'd allow her kettle to become 'furred up'.

Further Reading: en.wikipedia.org/wiki/Hard_water
(, Mon 15 Feb 2010, 7:48, 1 reply)

I like the depositing minerals bit, but I'm not so sure about the higher boiling point part. Why does that matter, you don't care about whether the water is boiling, just the temperature.
(, Wed 17 Feb 2010, 0:42, closed)

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