How does the adhesive force between the water and the material of the capillary tube exert an upwards force to create the concave meniscus shape of H2O (or the convex meniscus shape of Hg)? [more inside]
posted by sunnychef88
on Jul 8, 2013 -
What volume of 14 C water do I need to add to 30 L of 24 C water to have a product of water at 20 C? Is there an easy calculation for this sort of thing so that I can do this with different levels of water and/or temperature differences? [more inside]
posted by pwb503
on Oct 19, 2011 -
I have a perfectly spherical lead weight that weighs 1 kilogram. I drop it from the surface of the ocean directly into the Mariana Trench. How long does it take to hit the bottom, and how fast is it traveling when it hits? [more inside]
posted by Cool Papa Bell
on May 10, 2011 -
I need to make a vessel that will hold half gallon of water, and will not leak for at least 1 hour.
The catch? I can only use 1 newspaper, 1 pound flour, 1 tablespoon of salt.
It has to be ready for tomorrow. I can use my oven to bake it or dry it, so it has to fit in my oven. These are the "only" limitations. Any ideas?
posted by uauage
on Nov 16, 2010 -