Russell J. Wells Jr.
from Dearborn Hts., Mich.
Why is the efficiency of most all lasers limited to .1% to 30%? What are the limiting factors? What...
from Cherry Hill
I have a question regarding starfish, or seastars, whichever you would like. Is there a species of...
Is there a better alternative that has yet to be discovered other than zinc to be used in a battery?
from London Ont.
1. If the earth's population is about 6.2 billion now and it will double lets say every 35 years,...
Is there really a tree in Tasmania called the Huon Pine that is 20,000 years old?
According to my family, a comet streaked through the sky the morning one of my uncles was born. His...
Why is blood salty?
from Lansing, MI
How do "Fire Retardents" retard fire? If the flash point of any given material never changes? I...
I'd like to know what happens to radio waves once they have been emitted. Do they live forever?...
from Rahim yar Khan, Pakistan
What is vacuum ? How is it created because if we remove the air then the instrument in which we...
Why don't ordinary Silicon diodes emit light like LED's?
from the Internet
What makes classifying dogs in breeds different from classifying humans in races?
I thought that...
What are the intermolecular forces for polycrystalline solids? And what is the geometric shape? I'm...
The first four facts below suggest that the earth should be getting heavier and heavier - but it...
This question is in regard to ‘vintage Lucite purses’ that sometimes end up having an odor...
When a ball is rotated at the end of a string in a horizontal circle (parallel to the ground) what...
from niagara falls
What is the ingredient used to make "hair gel" stiff and hold?
What can I use to block magnetic lines of force? I have been working on an rf transmitter project...
What Satellite Galaxy is moving fastest toward the Galactic center? What Satellite Galaxy is moving...
Wilma de leon
What is the reaction between a chitin--the polysaccharide intermediate between protein and...
from New York
If hydrogen peroxide is bad for cells, why is it good for cuts? Also, how is it a good treatment...
What happens to a compass when it is held exactly on magnetic north? Does it just spin?
How far is Pluto from the sun, and will we ever be able to travel to other planets, besides the...
How can I tell the difference between Zinc and Aluminium metal?
Where on earth is the gas neon found? Is it common? Rare? In what form is it usually found (as a...
If the earth stopped revolving would humans weigh less or more? Would there still be gravity on...
Can you give me some information on the reaction of ascorbic acid and N-Bromosuccinimide? How do...
How do touch lamps work? If one person touches the touch pad and someone else taps his other hand,...
What is the difference between animal hibernation and a human coma? These states appear similar,...
from Victoria, BC, Canada
My wife asked me, "What does the sun burn and why doesn't it burn out?" I told her about helium...
How far is the Sun from Pluto? How long does it take for sunlight to travel to Pluto?
Can you explain how those bright sticks work, the ones that glow for hours with a snap and a shake?
Bruce MacKinnon, CET
from Kitchener, Ont
Is polyol used in the reaction of isocyantes (methylene diioscyante) the same compound as Glycerol?
from Thunder Bay
Last spring and summer there were millions of army worms creeping all over everything. Maybe worse...
I have made a theoretical discovery in my studies. It concerns vibrations of frame of reference in...
What is the history of solar ponds and what trends are expected for solar ponds in the future?
What makes the aluminum powder in an Etch-A-Sketch stick to the glass to make an image?
from Nampa, Alberta,Canada
Why was Mars formed?
from North Bay, Ontario
How can planetary angular momentum be tranferred from one body (Earth's rotation) to another...
I'm doing a science project and my topic is about the speed of sound. I was wondering if you...
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