I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...
Lee Ming Fei
Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...
If a sound is played to a person over a period of time, is there a way to work out (or to estimate)...
If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...
Does light exert force?
How does a lightstick work, and what are the chemicals involved?
Jerry E. Allen
Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....
Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?
My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
Can air in the pleural cavity cause the lungs to expand more fully than they normally would?
How much does a person's head or skull grow every year? If I'm 16, how much would it grow until it...
Why do we yawn when we see someone else yawn? Why is it contagious?
from Morris Plains, NJ
Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...
Loubelle I. Depita
from Koronadal City, South Cotabato, Philippines
Why are egg & milk used as antidotes for heavy metal poisoning and what other household remedies...
from Andradas-MG- Brazil
When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...
When does each organ system of the human body reach full maturity?
from Guwahati, Assam, India
Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...
Can you tell me what the exact pH of the acid in our stomach?
What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?
Why do wet objects shine?
When and how was the kaleidoscope made?
How would Giant Pandas being killed off affect my life?
I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...
If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...
Can you explain where the "extra" ATP comes from in photosynthesis? As I understand it:
How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...
from Los Angeles
Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?
Why do we have five fingers? My idea is that one of nature's themes is "having enough." It's like a...
In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...
In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...
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
What do you feed baby praying mantises? We found a mother praying mantis who laid an egg sack on a...
I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...
from lahore, pakistan
There is a controversy among my collegues that during agarose gel electrophoresis the band that...
Are light and matter the same thing? Can you get matter from light?
Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...
Why does HIV form resistance to ARV so quickly? HIV reproduces itself millions and millions of...
from Orange City, Florida
I have always heard that distilled water is a poor conductor of electricity. Is this true and if...
Does fabric softener affect drying time of towels?
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