Eduardo from Pembroke Pines asks

Is it true that gas particles at higher altitudes are farther away from each other than at lower...

Cheryl from Chesapeake, VA asks

I teach moon phases to my third graders. On posters, in textbooks, and online, I have seen...

Charles Kern from Detroit Lakes, Michigan asks

Is there a high permeability magnetic shield that does not have iron in it?

Tracy Weddell from Bakersfield, CA asks

Do neutron stars evolve further? Charts of star evolution always show the neuton star as the last...

Ian Gordon from Exeter UK asks

Why are sounds so much louder downwind, even when the wind is light?

Yevgeniy Perev from Staten Island asks

How much energy did the highest energy neutrino detected so far have?

Amanda from Thunder Bay, Ontario asks

What is colour? How does the brain perceive colour?

mark irvine from sacramento asks

If you have a square 1 pound block with a front flat surface strike a ball, would it be the same as...

Will McAbee from Pendlton asks

How does a atom split and how does it create such a big explosion? Also how can I split an atom at...

Alicia asks

What would be the appearance of the moon if it were in the western sky just after sunset? Why would...

Sara from Antigonish, Nova Scotia asks

How does the earth stay in the same place in space?

Ryan Martinez asks

Why do magnets erase magnetically recorded data? Are there some generally accepted guidelines for...

Margaret Klima asks

What are the globes which, when you puts your hand close to them, display electrical energy...

Serge Bellemare asks

Do all planets and stars rotate on themselves, and do we know why?

Kjell from Edmonton asks

Does light exert force?

Karl-Alexander Berg Brisebois from Dunham asks

Conservation of momentum can explain the exchange of a virtual photon between two electrons and the...

Matt from the Internet asks

Is the orbit of the moon around earth a perfect circle? If not, when is the moon closest to us? ...

Michal Jaworski from Calgary asks

A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated....

John Collins from West Vancouver asks

(Re: E=Mc^2) Why does E/M=c^2 rather than simply c^1 (which is an altogether respectably large...

Corinne Keffer from Halifax, NS asks

I have a liquid crystal display screen computer monitor. I am looking for unbiased information on...

Sahm Atman from Berkeley, CA asks

I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively...

Sahm Atman from Berkeley asks

Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then...

BALKRISHAN ARORA from Pune, India asks

1. I would like to know when was Hubble's constant discovered / invented? 2. How many times it...

justine van der Werf from Tiaro asks

I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...

Darrin asks

If light is made of photons, and photons have mass, and many photons of light are hitting the earth...

Sylvain Koenig from the University of Lausanne (Switzerland) asks

Why would one person when he returns from travel at the speed of light have aged differently than...

Stephen Ross from Hong Kong asks

1) Which of the following two options is more widely accepted by the scientific community? a)...

Andrew Hickey asks

Why do wet objects shine?

Lee Ming Fei asks

Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...

Markovic Ljiljana asks

When and how was the kaleidoscope made?

Mike Noe asks

Which would hit a baseball further - a wooden bat or a aluminum bat? Why??

Aaron Johnston asks

What would make it possible for a man to move through solid objects? Is it at least in theory...

D. Andrew White from Toronto asks

Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the...

David Keirsey asks

How did neutrinos get to be objects of such low energy? Neutrinos are supposed to have been...

Karl-Alexander berg brisebois from Dunham asks

Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...

Russell J. Wells Jr. from Dearborn Hts., Mich. asks

Why is the efficiency of most all lasers limited to .1% to 30%? What are the limiting factors? What...

Nathaniel P. Luga from Cebu City asks

What chemical or chemicals that can desolve a strong concrete structure, and what is its mixture...

Derrick Smith from Jacksonville asks

In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...

Marcel Leone asks

Is gravity considered to be one of the forms of energy such as electricity, heat, light,...

Donald from Halifax asks

If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...