Can a sintered ore magnet be re-magnetized in a different configuration of its poles? Does it need...
from Thunder Bay, Ontario
What is colour? How does the brain perceive colour?
If you have a square 1 pound block with a front flat surface strike a ball, would it be the same as...
from Detroit Lakes, Michigan
Is there a high permeability magnetic shield that does not have iron in it?
from Chesapeake, VA
I teach moon phases to my third graders. On posters, in textbooks, and online, I have seen...
from Antigonish, Nova Scotia
How does the earth stay in the same place in space?
How does a atom split and how does it create such a big explosion? Also how can I split an atom at...
from Bakersfield, CA
Do neutron stars evolve further? Charts of star evolution always show the neuton star as the last...
What are the globes which, when you puts your hand close to them, display electrical energy...
What would be the appearance of the moon if it were in the western sky just after sunset? Why would...
from Staten Island
How much energy did the highest energy neutrino detected so far have?
Why do magnets erase magnetically recorded data? Are there some generally accepted guidelines for...
from Berkeley, CA
I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively...
from West Vancouver
(Re: E=Mc^2) Why does E/M=c^2 rather than simply c^1 (which is an altogether respectably large...
from Halifax, NS
I have a liquid crystal display screen computer monitor. I am looking for unbiased information on...
Karl-Alexander Berg Brisebois
Conservation of momentum can explain the exchange of a virtual photon between two electrons and the...
Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then...
D. Andrew White
Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the...
If light is made of photons, and photons have mass, and many photons of light are hitting the earth...
from Hong Kong
1) Which of the following two options is more widely accepted by the scientific community? a)...
A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated....
Sylvain Koenig from the University of Lausanne (Switzerland)
Why would one person when he returns from travel at the speed of light have aged differently than...
I'm doing a science experiment with magnets and was wondering, do magnets lose their strength over...
from Pune, India
1. I would like to know when was Hubble's constant discovered / invented?
2. How many times it...
Do all planets and stars rotate on themselves, and do we know why?
from the Internet
Is the orbit of the moon around earth a perfect circle? If not, when is the moon closest to us? ...
What are the most recent theories about what existed before our big bang? Have there been one or...
Lee Ming Fei
Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
Does light exert force?
When and how was the kaleidoscope made?
How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...
What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?
If a sound is played to a person over a period of time, is there a way to work out (or to estimate)...
In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...
Why do wet objects shine?
I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...
Are light and matter the same thing? Can you get matter from light?
If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...
Is gravity considered to be one of the forms of energy such as electricity, heat, light,...
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