jimmcginn wrote:But there are a number of good reasons why I should not do the experiment.
As explained in the first paragraph of my book that you read, people generally refuse to consider evidence that contradicts what they believe.
I don't know what you problem is, dude. I've always maintained that evaporation is upward.
Your experiment failed to dispute my hypothesis. Here is a better experiment. As I indicated to Frank, if you are interested in doing this experiment I can assist, but from a distance. (I don't want there to be any doubt that I did not contaminate the results.)
Procedures and Methods for Measuring (Testing) the Weight of Moist Air Versus Dry Air
by James McGinn of Solving Tornadoes
Purpose: Compare the Weight of Moist Air Versus Dry Air (all other factors
Two Mason jars
One square foot of Aluminum foil
Fishing line, one yard, scissors
Distilled water, one ounce
Access to warm, dry room, or dry environment, like a desert setting
Extremely sensitive scales that can measure extremely small differences in
weight between mason jars
1) In warm, dry room, or windless, desert environment set up a table.
2) Prepare two, two by two inch squares of aluminum foil enclosed around a
cotton ball with fishing line, such that the whole thing can be lowered into
an open mason jar, without contaminating the jar with cotton or precipitate
from the water droplet.
3) Open two of the mason jars and let the ambient air balance. Put lids back
on. Weigh each one. Take lids off again.
4) In one of the two aluminum foil, cotton, fishing line thingies put a drop
of distilled water. Be sure to allow for it to breath so that moisture to
evaporate out of it.
5) Lower both of these thingies into two of the jars.
6) Turn the lids upside down for all three jars and place them over the top
of the jars, this will trap any moisture and prevent it from "convecting"
away. Wait for ten minutes, or so, allowing for evaporation.
7) By now moisture should have evaporated from the thingies into the mason
jars. This should have increased the moisture level in the one jar, the
moisture having pushed out an equal number of air particles. And it should
have left it unchanged in the other jars.
8) Carefully remove the thingies and screw the top on the jars tightly. Be
sure to only handle jars with latex gloves, don't tape or glue anything to
jars. Put jars in plastic bags to protect them from contamination.
Distinguishing marks can be put on the plastic bags, not the jars.
9) Weigh the mason jars and record their respective weights
10) Evaluate data.
If the moist air jar is heavier (as I claim) then my premise is proven. If
it is lighter then the traditional understanding is proven. If there is no
measurable different then more precise scales are needed.
The only complicating factors are finding a dry, windless environment and
getting scales that have the range and sensitivity.
Dave, if you want to do this experiment let me know. Maybe we could set up a crowd funding campaign to pay for the scales and the dry room.
James McGinn / Solving Tornadoes