I noticed an unusually fast moving cloud this morning. My questions are: What is the average velocity of a cloud? What is the greatest ever recorded cloud velocity? What factors affect the velocity ...
Cross post: http://chemistry.stackexchange.com/q/4377/22 Last week I was discussing with a friend how we thought the stripeless cleaning of windows is achieved when using a cleaner like Windex ...
What's the surface area of a liquid? How does evaporation increase if the surface area of a liquid is increased?
Wikipedia says that a substance that has a larger surface area will evaporate faster, as there are more surface molecules that are able to escape. I think the rate of evaporation should decrease as ...
This air plane just caught my eye. Two contrails apparently are flowing backward, slightly off-centered and then ultimately converge, giving the overall shape of a very narrow rhomboid parallelogram, ...