xkcd #3093: Drafting
xkcd #3092: Baker's Units
xkcd #3091: Renormalization
xkcd #3090: Sail Physics
xkcd #3088: Deposition
xkcd #3087: Pascal's Law
xkcd #3086: Globe Safety
xkcd #3085: About 20 Pounds
xkcd #3084: Unstoppable Force and Immovable Object