XKCD Web Comic #969: Delta-P (described)

A web comic of romance, sarcasm, math, and language.

Scene: A large brown wardrobe hurtles out of a gray-blue sky toward a darker gray-blue ocean. A hole has been drilled in the bottom of the wardrobe and a large ring inserted. A big black anchor chained to the ring dangles below. White letters against the dark of the ocean read:

Q = A(square root of 2gd)

Q = flow rate

A= area of opening

d = ocean depth (2 km)

g = Earth gravity

Flow:  ~400,000 liters/s

Water Jet Velocity: ~200 m/s

Caption:  The White Witch didn’t know what hit her.

Hover text:  If you fire a Portal gun through the door of the wardrobe, space and time knot together, which leads to a frustrated Aslan trying to impart Christian morality to the Space sphere.

Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).

Comic by xkcd.com. Described by BlindGadget under the Creative Commons license.