Yearly Archives: 2014

Evangelista Torricelli — October 25 marks the passing of Evangelista Torricelli. Torricelli was the Italian mathematician and physicist who invented the barometer. Torricelli was sent as a young man to study under his uncle, a Camaldolese monk. Once he learned all his uncle could teach, his uncle arranged to have him educated at […]

Today In Science History – October 25 – Evangelista Torricelli ... Recently updated !

This entry was posted on October 26, 2014 by Todd Helmenstine (updated on August 15, 2026)

Tycho Brahe — October 24 is Antonie van Leeuwenhoek’s birthday. Leeuwenhoek was a Dutch cloth merchant who became known as the Father of Microbiology. At the age of 16, Leeuwenhoek was apprenticed to a cloth merchant when he was introduced to a magnifying glass apparatus used in the business. Once he began his […]

Today In Science History – October 24 – Antonie van ...

This entry was posted on October 25, 2014 by Todd Helmenstine (updated on June 24, 2025)

Cat Periodic Table ver2 White — EDIT: These wallpapers have been updated to correct the atomic weights of iron and gallium. The updated cat periodic table wallpapers can be found at Cat Periodic Table – 2015. This is an updated version of the original Periodic Table Wallpaper with Cats. This version of the periodic table with […]

Periodic Table Wallpaper With Cats – Updated Version

This entry was posted on October 24, 2014 by Todd Helmenstine (updated on September 6, 2025)

Cat Periodic Table version 2 Green — This rainbow cat periodic table is an update of the original Cat Periodic Table wallpaper. There were some requests for the atomic weights to be added to the cats. Each cat now contains the atomic weights in addition to each element’s number, symbol and name. The different cat shapes represent different element […]

Rainbow Cat Periodic Table

This entry was posted on October 24, 2014 by Todd Helmenstine (updated on September 6, 2025)

Gilbert Newton Lewis — October 23 is Gilbert Newton Lewis’ birthday. Lewis was an American chemist best known for his valence bond theory and electron dot structures. Lewis spent much of his early career studying the thermodynamics of chemical systems. He made systematic measurements of the free energy of chemical reactions. He also introduced […]

Today In Science History – October 23 – Gilbert Lewis

This entry was posted on October 23, 2014 by Todd Helmenstine (updated on March 27, 2022)

Coulomb Force Example Problem 2 — Coulomb force is the force of either attraction or repulsion between two charged bodies. The force is related to the magnitude and charge on the two bodies and the distance between them by Coulomb’s Law: whereq1 and q2 is the amount of charge in Coulombsr is the distance in meters between […]

Coulomb Force Example Problem

This entry was posted on October 23, 2014 by Todd Helmenstine (updated on March 21, 2026)

Coulomb Example math step 5 — Coulomb’s Law is a force law between charged bodies. It relates the force to the magnitude and charges on the two bodies and the distance between them by the relationship: where q1 and q2 is the amount of charge in Coulombsr is the distance in meters between the chargesk is […]

Coulomb’s Law Example Problem

This entry was posted on October 23, 2014 by Todd Helmenstine (updated on March 21, 2026)

Hans Adolf Krebs — Hans Adolf Krebs: Hans Adolf Krebs was a German biochemist and Nobel laureate. Birth: August 25, 1900 in Hildesheim, Germany Death: November 22, 1981 in Oxford, England Claim to Fame: Krebs was a German biochemist who was awarded half the 1953 Nobel Prize in Medicine for his discovery of the […]

Hans Adolf Krebs

This entry was posted on October 23, 2014 by Anne Helmenstine (updated on March 15, 2025)

Adventures in the Atomic Age — Review of Dr. Glenn Seaborg’s Autobiography Adventures in the Atomic Age From Watts to Washington By Glenn T. Seaborg with Eric Seaborg Published by Farrar, Straus and Giroux Hardcover, 1st ed., 352 pp. September 2001; 0-374-29991-9 Dr. Glenn Theodore Seaborg was co-recipient of the 1951 Nobel Prize in Chemistry for […]

Adventures in the Atomic Age – From Watts to Washington

This entry was posted on October 23, 2014 by Anne Helmenstine (updated on February 25, 2026)