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Other

Gary from Birmingham asks,

Why is the time of a day measured using 24 hours?

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This question is answered in my Read the answer...


Chemistry

Gerry MacDonald from the Internet asks,

Is water from a dehumidifier de-ionized? The owner's manual for my car suggests that engine coolant...

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The water might not be de-ionized, but it's probably distilled. To make it...

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Biology

Kevin Swope from San Diego/California asks,

Why does Aspartame taste so sweet? What is the chemistry involved in something that tastes sweet?

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While great progress has been made in recent years, the exact chemistry of...

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Physics

Patrick Tekeli from San Francisco asks,

I was browsing the Cornell University Astronomy web site and I read in an answer to a question...

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Perception of stars is fundamentally limited by two factors: the brightness...

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