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Alvina Chung from Sydney asks

The first four facts below suggest that the earth should be getting heavier and heavier - but it...

Reggie Lykins from Cincinnati asks

I have two questions. 1. Do jellyfish have ears and if so can they hear well? 2. How many...

Steve Rock asks

I'd like to model magnetic fields on my computer, but I can't find any software. Can you point me...

Ed from Port Orchard, Washington, USA asks

Do magnets become less massive over time? It requires energy to hold a magnet on the refigerator...

Pat asks

If the earth stopped revolving would humans weigh less or more? Would there still be gravity on...

Gillian from Haliburton asks

I'd like to know what happens to radio waves once they have been emitted. Do they live forever?...

Pierce H. asks

Does mercury in its gas form act the same way as air - I mean if heated, does it rise?

Peter Griffin from Beaufort, SC asks

Are all non-toxic claiming products really non-toxic? And is there any simple way (such as a way...

Robert Steinhaus from Castro Valley asks

Can a fast breeder reactor like the famous Candu series of Canadian designed fast reactors be...

sabiha yamin from lahore, pakistan asks

I want to knock out the PHB depolymerase gene from the genomic DNA of a bacterium. Can you suggest...

Clare Reading from Mesa asks

What is the pH of Diet Pepsi? (or cola,generally) and... Does smoking affect the body's pH? If so,...

Atalinder S. Bindra asks

Is it possible to reach a black hole? What is the distance of the nearest black hole from earth? Is...

Rehan Ahmed from Rahim yar Khan, Pakistan asks

What is vacuum ? How is it created because if we remove the air then the instrument in which we...

Edward Driedger asks

How do touch lamps work? If one person touches the touch pad and someone else taps his other hand,...

Zambi Donburi from Brisbane, Australia asks

Is it true that no mass can travel at the speed of light? If this is true, as you are nearing the...

E.H. from AOL asks

I understand about the Curie tempurature but I am wondering if an electromagnet has a Curie...

David Howard from UK asks

Can you tell me whether it would be possible to launch a spacecraft into orbit using a giant...

Val Mullen asks

Is there really a tree in Tasmania called the Huon Pine that is 20,000 years old?

S.Leeberman asks

How do I estimate the mass of an object when I know its volume and nothing more? For example, how...

John Douglass asks

Hexane seeps out of the ground at old sites of underground gasoline storage tanks. Can I smell...

David Magill from Shippensburg asks

In 1828, Friedrich Wohler, a German chemist attempted to make an inorganic salt, ammonium cyanate,...

KIm from Waldorf asks

What furnishs H30+ in water solution?

Dave from Sutton asks

Are there foods to eat which lower/reduce harmful cholesterol levels, or is this achieved by...

Duane from the Internet asks

If two magnets are in contact with each other or close proximity to each other either repulsing or...

Bertrand Xiao asks

Is there a better alternative that has yet to be discovered other than zinc to be used in a battery?

Fester from Tacoma asks

I'm doing a science project and my topic is about the speed of sound. I was wondering if you...

Vasu from London,ON asks

Is it possible for a singularity to form outside a black hole?

Kiran Gupta from Singapore asks

Why does a rare earth magnet fall slowly in an aluminium tube but it falls really fast when I toss...

Adil asks

Has absolute zero (0 K) ever been reached a laboratory?

Wilma de leon from Philippines asks

What is the reaction between a chitin--the polysaccharide intermediate between protein and...

Leo Capistrano asks

How long would a single molecule of a radioactive element last? If the half-life of U-235 reduces...

Andrew from Friendly asks

Who was the first scientist to study light?

erin asks

Can you explain how those bright sticks work, the ones that glow for hours with a snap and a shake?

TJ from Thunder Bay asks

Last spring and summer there were millions of army worms creeping all over everything. Maybe worse...

David Keirsey asks

What are the quantum numbers that are involved in the distinction between matter and antimatter? I...

M Harish from Mumbai asks

Why does a bar magnet repel when it breaks?    n====|====s

Chris from J-town asks

A friend at a party showed me that you can take a glass bottle, fill it with water, but not all the...

Ian from London asks

How can I tell the difference between Zinc and Aluminium metal?

Mouabbi Rami from Athens asks

Why do most industrial LASER diodes emit pulsing light beams and not continuous ones? And what is...

Rudolf Olivier from Gauteng, South Africa asks

Water is made up of H2O. H will burn and O2 will burn. Why does water not burn?