[Gibbon1]

The energy needed to bring a teapot to boil is enough to fling a nickel into orbit.

[yellowapple]

Regrettably, I doubt the average home has a stove hot enough to boil teapots.

[visarga]

I was curious, it comes about 310Kj if you ignore friction, or about the same calories as you gain by eating an apple.

[koheripbal]

Only if you ignore friction.