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Leo Capistrano asks

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

Jessica Reynolds asks

Since there are no molecules within the vacuum of space to allow heat transfer, how can the air...

Dane Haas from Flesherton asks

What are the most recent solar storms and will they effect the Earth's atmosphere?

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,...

aparna from Petaluma asks

Why is blood salty?

Alvina Chung from Sydney asks

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

E.H. from AOL asks

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

Edward Driedger asks

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

Reggie Lykins from Cincinnati asks

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

Angela from Portland asks

This question is in regard to ‘vintage Lucite purses’ that sometimes end up having an odor...

Bertrand Xiao asks

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

Duane from the Internet asks

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

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...

Pierce H. asks

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

Pat asks

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

Atalinder S. Bindra asks

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

Val Mullen asks

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

David Keirsey asks

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

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...

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...

Fester from Tacoma asks

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

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...

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...

David Howard from UK asks

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

TJ from Thunder Bay asks

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

Dave from Sutton asks

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

Jonathan Weiler asks

Would it be possible to clone dinosaurs?

KIm from Waldorf asks

What furnishs H30+ in water solution?

Mouabbi Rami from Athens asks

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

David Magill from Shippensburg asks

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

Roman asks

How do scientists detect nutrinos when they have no mass and no charge?

Yossi Truzman from Ra`anana asks

In our breathing system we have two coenzymes NADH and FADH2. Why do we have two coenzymes? And why...

Wilma de leon from Philippines asks

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

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...

Andrew from Friendly asks

Who was the first scientist to study light?

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...

Vasu from London,ON asks

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

Dr. X from Cornberry asks

I have made a theoretical discovery in my studies. It concerns vibrations of frame of reference in...

Adil asks

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