Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Low specific heat does a metal spoon heat up quickly when placed in a hot drink.
[EX A]: Why does a metal spoon heat up quickly when placed in a hot drink?

[EX Q]: All life is built around the element carbon.
[EX A]: What element is all life built around?

[EX Q]: Another measure of the effectiveness of a machine is its mechanical advantage.
[EX A]:
Another measure of the effectiveness of a machine is its what?