Category: Elementary Physics
Blog Entry © Monday, October 7, 2024, by James Pate Williams, Jr. Recent Voyages into the World of Quantum Chemistry
Blog Entry © Saturday, October 5, 2024, by James Pate Williams, Jr. Multidimensional Integrals
Blog Entry © Thursday, October 3, 2024, by James Pate Williams, Jr. A Mixture of Numerical Analysis and General Relativity Physics
Blog Entry (c) Saturday, September 28, 2024, by James Pate Williams, Jr. New Iowa Ballistics Table
I created the following fast battleship Iowa class ballistics table using a single coefficient of form with the value 0.531. The ballistic coefficient is 19.86229.
For comparison use the actual October 1941 Iowa class ballistics tables:
https://eugeneleeslover.com/USN-GUNS-AND-RANGE-TABLES/OP-770-1.html
Blog Entry © Thursday September 26, 2024, by James Pate Williams, Jr. Atmospheric Air Density Two Models
I wrote a C# program to graph NASA’s Earth Atmospheric Model’s variation of air density with height in Imperial Units and the United States Navy’s air density altitude equation.
Earth Atmosphere Model – Imperial Units (nasa.gov)
The USN’s formula for density – altitude is found in “Exterior ballistics, 1935” by Lieutenant Commander Ernest Edward Herrmann who was an instructor at the United States Naval Academy.


Blog Entry © Tuesday, September 24, 2024, by James Pate Williams, Jr. My Father Was a Cost Accountant
My father, James Pate Williams, Sr. (Born November 8, 1912, and Died February 10, 1993) was forced to quit school at the age of thirteen in 1925 or 1926 and was initially a sweeper at the West-Point Textiles Company’s Dixie cotton mill on Greenville Street in LaGrange, Georgia. The reason he quit school was to support his birth family after they were abandoned by my Williams side grandfather. Sometime in the 1930s my father received a cost accountant degree from LaSalle Extension University based in Chicago, Illinois. He corresponded via mail with his professors to earn his degree. LaSalle Extension University was one of the first examples of a distance learning center. While on the job he used a Friden tabulating machine, a K&E drafting kit, and K&E slide rule. I probably got my love of mathematics and numbers from my birth parents. My father taught me how to use a compass, protractor, slide rule, and tabulating machine. He used paper spreadsheets and his Friden calculator to maintain household expenses and to document his and my mother’s income tax. My father was also in charge of the Civil Defense equipment stored at Dixie Mill. That Cold War era equipment included a Roentgen measuring device and Geiger counter. I learned how to use both Civil Defense devices while I was in high school.
Blog Entry (c) Thursday September 19, 2024, by James Pate Williams, Jr. Ship to Ship Ballistics
The following graphs and data are for a hypothetical engagement between the Battleship Iowa (BB-61) and an unlucky enemy warship. My numbers are very close to those found in Ordnance Pamphlet 770 at the following website:
https://eugeneleeslover.com/USN-GUNS-AND-RANGE-TABLES/OP-770-1.html
