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Nick Reed from Cherry Hill asks

I have a question regarding starfish, or seastars, whichever you would like. Is there a species of...

Atalinder S. Bindra asks

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

David Howard from UK asks

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

Angela from Portland asks

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

Gillian from Haliburton asks

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

Edward Driedger asks

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

aparna from Petaluma asks

Why is blood salty?

Sara asks

What happens to a compass when it is held exactly on magnetic north? Does it just spin?

James Hope from Gloucester asks

I recently read a book on the big bang, and it said that protons and neutrons are made up of 3...

Jessica Reynolds asks

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

S.Leeberman asks

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

Wilma de leon from Philippines asks

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

Dave from Sutton asks

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

David Woodard from Lansing, MI asks

How do "Fire Retardents" retard fire? If the flash point of any given material never changes? I...

David Magill from Shippensburg asks

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

Adil asks

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

Daniel Eyre asks

How far is Pluto from the sun, and will we ever be able to travel to other planets, besides the...

Vasu from London,ON asks

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

Alvina Chung from Sydney asks

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

TJ from Thunder Bay asks

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

Pierce H. asks

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

Andrew from Friendly asks

Who was the first scientist to study light?

Amanda Gillis from Margaree asks

What are the intermolecular forces for polycrystalline solids? And what is the geometric shape? I'm...

Bertrand Xiao asks

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

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...

Furqan from Lahore asks

Why don't ordinary Silicon diodes emit light like LED's?

Ian from London asks

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

Robert Steinhaus from Castro Valley asks

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

Ed from Port Orchard, Washington, USA asks

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

Francis from Ottawa asks

When a ball is rotated at the end of a string in a horizontal circle (parallel to the ground) what...

James from Hamilton asks

How do we explain the difference between cells that can repair damaged tissue, such as skin cells,...

erin asks

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

Josh from New York asks

If hydrogen peroxide is bad for cells, why is it good for cuts? Also, how is it a good treatment...

David Keirsey asks

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

Bruce MacKinnon, CET from Kitchener, Ont asks

Is polyol used in the reaction of isocyantes (methylene diioscyante) the same compound as Glycerol?

Julie from London asks

Can you give me some information on the reaction of ascorbic acid and N-Bromosuccinimide? How do...

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...

Duane from the Internet asks

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

Fester from Tacoma asks

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

Kelvin from Markham asks

Why does the Original Coke sink into the water, when Diet Coke floats in the water?