Monthly Archives: March 2015

Easter Egg Themed Periodic Table — Happy Easter! Finding hidden eggs is one of the fun parts of the holiday. Hunt your favorite element with this Easter Egg Hunt on the Easter periodic table wallpaper. Each dyed egg contains the element’s atomic number, symbol, name, and atomic mass. The different egg colors represent different element groups. Click […]

Easter Periodic Table Wallpaper

This entry was posted on March 31, 2015 by Todd Helmenstine (updated on March 28, 2018)

This table contains values for sine, cosine and tangent for angles between 0 and 90º. All values are rounded to four decimal places. Click the image for the full-sized image or download the PDF version. The downloadable trig table PDF is optimized to fit on a single 8½ x 11″ […]

Downloadable Trig Table PDF – Sine, Cosine, Tangent

This entry was posted on March 25, 2015 by Todd Helmenstine (updated on May 2, 2021)

45-45-90 Right Triangle — Right triangles are central to trigonometry. Two special right triangles appear over and over in standardized exams and homework problems. These triangles are “special” because they have simple ratios between the lengths of each side. The first is the 30-60-90 triangle. The 30-60-90 is named after the interior angles of […]

Special Right Triangles

This entry was posted on March 24, 2015 by Todd Helmenstine (updated on April 8, 2021)

Icelandair Aurora Hekla (Anne Helmenstine) — Viewing a total solar eclipse from an airplane is a bit different from viewing one from the ground! On the one hand, you can get above the clouds, so it’s practically a given that you’ll have a clear sky. Also, the speed of the jet increases the duration of totality, […]

Total Solar Eclipse from the Air – March 2015 Iceland

This entry was posted on March 22, 2015 by Anne Helmenstine (updated on March 22, 2023)

Right Triangle — The right triangle is a special type of triangle that forms the basis for nearly all trigonometry functions. As you know, a triangle is a closed shape consisting of three sides. Every two of these sides form an angle between them for a total of three interior angles. These three angles […]

Right Triangles – Trigonometry Basics

This entry was posted on March 20, 2015 by Todd Helmenstine (updated on April 8, 2021)

Viking at the Saga Museum in Reykjavik — I got off to an adventurous start, even before reaching Iceland. It snowed in Boston, my point of departure to Reykjavik, grounding planes and spreading misery. Logan International Airport sent out the snowplows and the IcelandAir pilot (a woman… yes!) skated the jet down the runway and into the air. […]

Getting to Iceland – The Adventure

This entry was posted on March 17, 2015 by Anne Helmenstine (updated on November 19, 2022)

TSA Screening a Bag (US Department of Homeland Security) — Have you ever been swabbed by TSA going through the security checkpoint at the airport? Have you ever failed? It’s okay… me too. If you work in certain jobs (like, presumably, those that demonstrate the ability to make explosives), there’s a good chance you’re going to get tested. Or, it […]

How To Fail the TSA Swab Test – Iceland Eclipse ...

This entry was posted on March 14, 2015 by Anne Helmenstine (updated on November 19, 2022)

Electric Blue Lytro Camera — I had this crazy notion that I’d get a lot of work done today, so I could spend my downtime at the airport playing Minecraft. Hah! No… I’m way too excited to be productive. Instead, I got one of my toys ready for the trip. It’s a Lytro camera, which […]

Iceland Eclipse and Aurora Trip – The Lytro Camera

This entry was posted on March 13, 2015 by Anne Helmenstine (updated on November 19, 2022)

How a Chocolate Souffle Models a Real Volcano — Bake a chocolate volcano souffle and learn how a souffle is a good model for how a real volcano works. The recipe is easy and delicious.

Bake a Chocolate Volcano Souffle to Model a Real Volcano

This entry was posted on March 13, 2015 by Anne Helmenstine (updated on October 1, 2023)