Todd Helmenstine


About Todd Helmenstine

Todd Helmenstine is the physicist/mathematician who creates most of the images and PDF files found on sciencenotes.org. Nearly all of the graphics are created in Adobe Illustrator, Fireworks and Photoshop. Todd also writes many of the example problems and general news articles found on the site.



Wild Cats Wordsearch
Do you know your wild cat species? This wild cats word search contains 24 different wild cat breeds. Find the words from the list forward and backward in vertical, horizontal, and diagonal directions. The puzzle is optimized to fit on a standard 8.5″x11″ sheet of paper, but it fits nicely […]

Wild Cats Word Search





Fluid ounces to milliliter conversion example
Volume measurements can be some of the most confusing set of measurements. This example problem shows how to convert fluid ounces to milliliters. This conversion is also useful for converting recipes from European and Asian sources to the commonly used measurements in American kitchens. The fluid ounce (fl oz) in […]

Fluid Ounce to Milliliter Conversion – fl oz to mL ...


Waves Word Search
This waves word search contains glossary terms associated with the study of waves and wave motion. Find the words from the list forward and backward in vertical, horizontal, and diagonal directions. The puzzle is optimized to fit on a standard 8.5″x11″ sheet of paper, but it fits nicely on A4 […]

Waves Word Search