Once again, it is that day of the year when we reflect over how the year behind us was and make our predictions and wishes for the year to come.
One important piece of news during 2019 was that researchers at my alma mater Chalmers University of Technology, Gothenburg, Sweden, led by professor Kasper Moth-Poulsen reported that they have developed a molecule, that is able to capture the sun’s rays, store it as chemical energy for up to 18 years, and retrieve the energy and convert it into heat when needed.
The following graphic shows how it all works:
References # 1 through 4 below contain more material if you are interested in further details.
Can you use an hourglass?
So you think are smart? Then show it now! We have two hourglasses like the ones shown above. The bigger ones completes one cycle in 11 minutes, the small one in 7 minutes.
Question: Using a combination of these two hourglasses, you need to measure a time lapse of exactly 15 minutes. How would you do it? (Solution to follow in the first blog post of 2020.)
I wish all my faithful blog readers a HAPPY NEW YEAR!