Category: Molecular Workbench
Figure 1. An IR image of a freshwatercup and a saltwater cup after an icecube was added to each.Will an ice cube melt faster in freshwater or saltwater? Why do we salt the road in water? How does an iceberg melt and how might it affect the ocean curren…
Figure 1. A page with some colorstrips under a table lamp. Click theimage to enlarge it to see the details.We all know black objects absorb more light energy than white ones. What about red, green, blue, and any other colors? With an infrared (IR) came…
Figure 1. A top view of a floatingice cube.If you have done a convection demo using a container of water and some ink, you may have had to change the water after each demo since the ink had diffused everywhere, which may make the convection pattern les…
Figure 1. The salinity gradient and temperature gradient observed in anopen cup of saturated saltwater.This is the fifth follow-up of the blog article: “A perfect storm in a cup of salt water?” This investigation focused on the…
Figure 1. Two shallow plastic containers. The left one holds a lot of salt and the right one is plain water. A small amount of water was added to the left one.This is the fourth followup of the blog article: “A p…
This is the third followup of the blog article: “A perfect storm in a cup of salt water?”I woke up last night with a perfect explanation for the mysterious temperature gradient observed in a saturated salt solution. It is the recrystallization of salt …
This is the second followup of an earlier blog article “A perfect storm in a cup of salt water?”I did an experiment to investigate the relationship of the salt concentration with the mysterious temperature gradient in a cup of salt water. The experimen…
This is the first followup of the blog article last week “A perfect storm in a cup of salt water?”.Several people including Bob Tinker, John Loosmann, and Einar Berg suggested that it was the evaporation of water that drives the observed persisting tem…
I was bothered by an experiment I did recently about the temperature distribution in a cup of salt solution. I added a few spoons of table salt and baking soda in two cups of water to create two saturated solutions. Then I left them sit there for a few…
Infrared (IR) imaging is a technique for seeing heat based on detecting thermal radiation (mostly IR) an object emits. It used to be a very expensive tool only affordable to guys in military and secret services where money is not a problem.You can now …