Jonas Malmgren asks

Is the interstellar space between the galaxies completely empty? Not even a single star or a nebula?

Tyler Salo asks

When rockets were sent to Jupiter, did scientists get any readings? Does Jupiter have a solid...

Aaron Johnston asks

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

Rod from canterbury asks

Is there any magnetic shielding material which is not itself attracted by a magnet?

Leo Capistrano asks

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

Edward Driedger asks

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

Steven Hoaglund asks

Galileo said, "in a vacuum, all objects fall at the same speed." Well, I have an idea that might...

Gaston Fournier asks

NASA has recently detected the presence of ice on the moon. Since the moon is surrounded by void...

peel from the Internet asks

What would happen if the nucleus of an atom contained too many or too few neutrons, or even none? ...

patric hedlund asks

According to my family, a comet streaked through the sky the morning one of my uncles was born. His...

Marcel Leone asks

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

James Hope from Gloucester asks

I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...

D. Andrew White from Toronto asks

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

Chris asks

Can absolute zero (0 degrees Kelvin or -273.16 degrees Celsius) be registered on a thermometer,...

Hongyi Li asks

Does antimatter's gravity have the same properties ordinary matter?

Ron Belmont asks

How do you calculate potential energy for an object which is sitting on the floor? PE=mgh, which...

Mouabbi Rami from Athens asks

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

Marin from the Internet asks

Is it possible to create plasma using two high voltage electrodes , cathode and anode. Would air...

George Chronis from Toronto asks

I have a few questions regarding Space-Time that have always confused me. I would very much...

YIanni Mitropoulos from Melbourne asks

If a sound is played to a person over a period of time, is there a way to work out (or to estimate)...

Benoît Mailhot asks

Are light and matter the same thing? Can you get matter from light?

Ed from Port Orchard, Washington, USA asks

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

Gregg Echols from Phoenix asks

What are the temperatures reached at the focused point of a magnifying glass, when using the sun as...

David Dexter from Mill Valley, CA, USA asks

This came up during a homeschool astronomy lesson: Why does the back of the Moon not have large...

Paul from Romania asks

What i don't understand is why the intensity of the electric field is 0 inside a charged (empty on...

Ryan from Maryland asks

I'm doing a science experiment with magnets and was wondering, do magnets lose their strength over...

Gabriel from Winnipeg, MB asks

What is the distance from the sun for each of the elements in the periodic table where they would...

Fred Bucheit asks

How does mass shifting affect Earth's rotation? Could melting of polar icecaps cause a change in...

Pat asks

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

Pierre Charbonneau, Eng. from Jonquière, Quebec, Canada asks

Is there actually a strobe light on the International Space Station? I saw in the sky a sequence of...

Stanley Jeffs from Cortona asks

I have been reading Feynman and what he says seems to make sense to me, in particular:photons are...

Jen Collard from Brockville asks

Light cannot escape from a black hole, because of the black hole's mass. If this is true, then...

Jesse from Ottawa, Ontario asks

Why do ceramic magnets lose their strength in extremely cold temperatures like dry ice?

Eric Cashmore asks

What is the name of the most recent planet discovered, and where is it?

Yevgeniy Perev from Staten Island asks

When our galaxy will absorb the 2 Magellanic Clouds, that will produce a starburst. For how long...

Mike from Brussels asks

I have been doing an experiment in school and I don't understand why the following happens. When we...

David Keirsey asks

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

Jessica Reynolds asks

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

Roman asks

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

A. D. asks

I am interested in the age-old debate on whether a person gets wetter by walking in the rain or by...