Most popular

Margaret Moore asks

Can you tell me what the exact pH of the acid in our stomach?

Jordan Duncan from Prince George, BC Canada asks

I need to know what happens to wood (softwoods, hardwoods and kiln dried woods) when they are...

A.E. asks

Why do we have five fingers? My idea is that one of nature's themes is "having enough." It's like a...

Darrin asks

Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...

Tyler Salo asks

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

Benjamin Raja from Singapore asks

At what speed does the world's slowest living thing travel? And what is the world's slowest living...

Robert Wahl asks

Is it true that bats don't pass their food through but vomit it up while they are hanging upside...

Joaquin Cornejo from Los Angeles asks

Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?

Harry Pritchard asks

How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...

George Donati from Andradas-MG- Brazil asks

When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...

Marcel Leone asks

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

Aaron Johnston asks

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

Benoît Mailhot asks

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

Hongyi Li asks

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

Stephen Leece from London asks

I am currently researching how sugar (sucrose) reacts with various chemicals. I am particularly...

sabiha from lahore, pakistan asks

There is a controversy among my collegues that during agarose gel electrophoresis the band that...

Totoro asks

How do antiperspirant products work? Could you use one on your chest to prevent sweating?

Kevin Pagn from Vancouver asks

Is a nerve impulse considered an electric current since it induces a magnetic field?

Erin Harris asks

How would Giant Pandas being killed off affect my life?

Harriet Quaide from Birmingham asks

Is it possible to test for, and diagnose, mitochondrial disorders, after death? How? Can this be...

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...

Grade One, Chesterville Public School from Chesterville, Ontario asks

What do you feed baby praying mantises? We found a mother praying mantis who laid an egg sack on a...

bahar from iran asks

We want to know, when we burn NaCl, what happens to Cl?

Ron Belmont asks

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

David from Ottawa asks

I was wondering how I could test for things like heavy metals. How can I do that without paying for...

Amanda from Calgary asks

I am interested in finding more information on how to detect the presence of arsenic in the foods...

George Chronis from Toronto asks

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

Kelly asks

What is the structure of chicken bone?

Marie from Rochester asks

My whole family plays hockey. We have frequently discussed how long of a shift should be and with...

Morten Aasbak from Bergen, Norway asks

I came across a "water powered clock", and it can supposedly generate power from water alone. My...

Ethan Diener asks

If body temperature is 98.6 degrees, why does 98.6 degree water feel hot when you place it on your...

Akin from Winnipeg asks

Why does HIV form resistance to ARV so quickly? HIV reproduces itself millions and millions of...

Charcoal from the Internet asks

What makes classifying dogs in breeds different from classifying humans in races? I thought that...

Rod from canterbury asks

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

Jen Collard from Brockville asks

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

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...

Jonas Malmgren asks

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

George Murphy asks

An article in the National Geographic magazine describes the Big Bang event as linear in form. Does...

Leo Capistrano asks

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

eddie poirier from Orange City, Florida asks

I have always heard that distilled water is a poor conductor of electricity. Is this true and if...