The most legendary mathematical tricks, the worst obstacles in the history of physics and all kinds of formulas in which hardly anyone can see the hidden meaning: these are the inhabitants of the world of Freestetter formulas.
All episodes of his weekly column, which appears every Sunday, can be found here.
Jiwon Han looked at these natural frequencies and compared them to the vibrations created when you hold a cup of coffee. With the typical dimensions of a cup of 95mm high and 82mm in diameter, you get a natural frequency of around 4Hz. This exact frequency can be found in the movement of the hands during normal walking, as Hahn discovered in related experiments. So it's no wonder it's so easy to pour over coffee.
By identifying the problem, you can easily find a solution. For example, you can walk backwards. The unusual movement makes you move your hands differently than before and the natural frequency of the coffee cup is no longer stimulated. Unfortunately, this does not reduce the risk of spillage. Especially if we're all carrying our coffee backwards around the place from now on. But you can also hold the cup in a different way, in the form of a “claw hand,” Hahn explains. Instead of using the handle, you hold the cup by the top with your fingers and this also prevents natural frequency stimulation.
Red wine instead of coffee
This solution is very practical and much less obvious than reverse gear. If you still don't want to go without transporting the coffee as usual, you will have to switch to a different container to prevent spillage. The natural frequency depends, among other things, on the radius of the cup; The smaller it is, the higher the frequency and the more difficult it is to stimulate while walking. For example, you can drink coffee from test tubes, but this is somewhat hesitant in most laboratories.
More Stories
Coral Seeding: Artificial Insemination Makes Coral More Heat Tolerant
Fear, Anger, and Denial: How People Respond to Climate Change – Research
LKH Graz: Using radiation to combat heart arrhythmias