When cooking a potato in a conventional oven it is useful to stick a nail in it, which makes it cook faster. This is because
A) the nail is a good radiator of heat
B) the nail promotes convection in the potato
C) the nail is a good conductor of heat
D) the nail gets much hotter than anything in the oven

Question

Quizplus · Accepted Answer

The nail conducts heat into the center of the potato more efficiently than the potato can by itself, because metal is a better conductor of heat than the potato's flesh. This reduces cooking time by distributing heat more evenly inside the potato.

When Cooking a Potato in a Conventional Oven It Is