The ladder method is an easy way of converting metric units using simple conversion factors. Here's how it works.
Daily Archives: August 22, 2014
August 22 is Denis Papin’s birthday. Papin was a French physicist and inventor of one of the first steam engines. Papin was introduced to the air-pump by Christiaan Huygens, another French physicist, astronomer, and inventor. This device allowed them to add or remove air from a vessel to investigate vacuum […]