Science Questions Answered By Experts in the Field

Portable Antiquities from Conflict Zones: Identifying and Safeguarding Cultural Heritage

December 28, 2012 by Val Williamson, PhD Leave a Comment

Jewelry excavated with the Afghanistan Oxus hoard: Image by dynamosquito

If you receive a gift of jewelry or antiquities from a war-zone or other foreign region, check to make sure it’s not part of the area’s cultural heritage.

Filed Under: Anthropology, Ask the Expert, Headlines

Estimating Whether No Two Snowflakes are Alike

December 24, 2012 by Mike DeHaan 1 Comment

Snowflakes on Blue : Image by Juliancolton2 (Julian Diamond)

Everyone says that no two snowflakes are alike, but how do we really know? By calculating the probability based on the Birthday puzzle in math.

Pages: 1 2 3

Filed Under: Ask the Expert, Headlines, Mathematics

The Cavendish Experiment To Measure the Gravitational Constant, G

December 21, 2012 by Paul A. Heckert, Ph.D. Leave a Comment

Newton's law of universal gravity. Image by DNA-Dennis

Reader’s question: How can we use the Cavendish experiment help us determine G, the gravitational constant, to measure the mass of the Earth?

Pages: 1 2

Filed Under: Ask the Expert, Headlines, Physics

Expansion of the Universe and Light Travel-Time from Distant Galaxies

December 19, 2012 by Paul A. Heckert, Ph.D. Leave a Comment

The Andromeda Galaxy Image Credit: Kitt Peak National Observatory.

The universe is expanding. Light from distant galaxies travels toward us even as the galaxies travel away from us; making light’s total travel time longer.

Pages: 1 2

Filed Under: Ask the Expert, Astronomy, Headlines

Is There a Connection Between a Burning Log and E=mc2?

December 18, 2012 by Mark Egdall Leave a Comment

Burning a Log. Heat breaks the bonds of carbohydrates (CnH2nOn) in the wood. The atoms then combine with oxygen from the air to produce CO2, CO, H2O, and electromagnetic radiation (heat and light).
Image Credit: Robert Craft, PublicDomainPictures.net.

Does Einstein’s famous equation, E=mc2, apply to the energy transfer that takes place when wood is burned? Mark Egdall answers this reader’s question here.

Pages: 1 2

Filed Under: Ask the Expert, Headlines, Physics

Decoded Science Ebooks

Using Social Science to Improve Your Health. Image by Gina Barrett Putt

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Flying is Fun! is based on the aviation articles which Helen Krasner wrote for the magazine Flight Training News during the years 2011 to 2012. It begins with an article from Helen’s early days of learning to fly, My Learning-to-Fly Nightmare, which should provide encouragement for anyone who is struggling with the PPL course. The next three articles are about topics of general interest to private pilots. Then come a group of helicopter related articles, but these should still provide food for…Flying is Fun!

The Hunter and the Scorpion: In an endless cosmic chase the scorpion pursues the hunter, his intended victim, as they run across the sky. The Hunter and the Scorpion begins with the mythological lore behind two prominent easy to locate constellations: Orion, the Hunter, and Scorpius, the Scorpion. The Hunter and the Scorpion however encompasses much more than a constellation guidebook. Integrating ancient mythology, constellation lore, and modern astrophysics it tells the life story of stars an…The Hunter and the Scorpion

Unsung Heroes of Modern Physics Of course you’ve heard of Albert Einstein, creator of special and general relativity, and other famous scientists – but there are many other physics pioneers who have received very little mainstream recognition for their contributions to history. Join Ira Mark Egdall, as he explores the fascinating history of five Unsung Heroes of Modern Physics. Despite extraordinary achievements in relativity, quantum mechanics, astronomy, cosmology, or space exploratio…Unsung Heroes of Modern Physics

Portable Antiquities from Conflict Zones: Identifying and Safeguarding Cultural Heritage

Estimating Whether No Two Snowflakes are Alike

The Cavendish Experiment To Measure the Gravitational Constant, G

Expansion of the Universe and Light Travel-Time from Distant Galaxies

Is There a Connection Between a Burning Log and E=mc2?

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