what if?

what if? is a blog hosted on the xkcd.com domain and written by Randall Munroe with entries posted every Tuesday. As per the site's tagline, the purpose of the site is "answering your hypothetical questions with physics, every Tuesday". On the blog, Randall discusses uses his degree in physics and strong scientific background to discuss hypothetical physics questions apparently submitted by readers.

The questions Randall tackles range from realistic possibilities (e.g. the probability of achieving a perfect SAT score by guessing) to completely fictional questions (e.g. How much Force power can Yoda output?).

In his explanations, Randall, often using diagrams in an xkcd style. He also tends to take the questions extremely literally to the point of humor. For example, in one article he discusses what would happen if you assembled a mole (the unit of measure) of moles (the animal). The discussion divolves into a discussion of a planetary body composed of decomposing mole carcasses. When faced with impossible assessments, he attempts to make rational sense of them, such as assessing Yoda's abilities based on feats he performs on screen.