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Lee Ming Fei asks

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

Marlene Caissie asks

I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...

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)...

Carla Becker from Dallas asks

If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...

Kjell from Edmonton asks

Does light exert force?

Jerry E. Allen asks

Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....

Mark Seymour asks

Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?

Intruder from Singapore asks

How does a lightstick work, and what are the chemicals involved?

Brandi asks

Can air in the pleural cavity cause the lungs to expand more fully than they normally would?

David Critch asks

My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...

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...

Sandra Lenzi from Morris Plains, NJ asks

Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...

Adam Roda asks

Why do we yawn when we see someone else yawn? Why is it contagious?

Giovanni Cuevas from Bronx asks

How much does a person's head or skull grow every year? If I'm 16, how much would it grow until it...

Lisa from London asks

When does each organ system of the human body reach full maturity?

Loubelle I. Depita from Koronadal City, South Cotabato, Philippines asks

Why are egg & milk used as antidotes for heavy metal poisoning and what other household remedies...

Tridib Das from Guwahati, Assam, India asks

Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...

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...

Andrew Hickey asks

Why do wet objects shine?

Kaycie Nabeta asks

Can you explain where the "extra" ATP comes from in photosynthesis? As I understand it: 24 ATP...

Margaret Moore asks

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

Citre asks

What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?

Markovic Ljiljana asks

When and how was the kaleidoscope made?

Donald from Halifax asks

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

Erin Harris asks

How would Giant Pandas being killed off affect my life?

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...

Harry Pritchard asks

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

Ian Hancock from Calgary asks

In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...

Joaquin Cornejo from Los Angeles asks

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

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...

Derrick Smith from Jacksonville asks

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

Karan Rana from Atlanta asks

I am doing some research on microarrays. I wish to know if mRNA's also have open reading frames as...

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...

Benoît Mailhot asks

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

Garry McKay from Melbourne asks

I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...

sabiha from lahore, pakistan asks

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

Darrin asks

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

Akin from Winnipeg asks

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

jose from miramar asks

Does fabric softener affect drying time of towels?

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...