Does light exert force?
Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?
I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...
I've been doing a science fair project testing the effectiveness of Lactaid(TM) lactase. From a...
Why do we yawn when we see someone else yawn? Why is it contagious?
How does sugar conserve food?
How does a lightstick work, and what are the chemicals involved?
My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...
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...
At what speed does the world's slowest living thing travel? And what is the world's slowest living...
Jerry E. Allen
Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....
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...
Why do wet objects shine?
How much does a person's head or skull grow every year? If I'm 16, how much would it grow until it...
Can air in the pleural cavity cause the lungs to expand more fully than they normally would?
If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
When and how was the kaleidoscope made?
from Guwahati, Assam, India
Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...
What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?
from Andradas-MG- Brazil
When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...
Can you tell me what the exact pH of the acid in our stomach?
In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...
When does each organ system of the human body reach full maturity?
How would Giant Pandas being killed off affect my life?
In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...
Are light and matter the same thing? Can you get matter from light?
I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...
How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...
from lahore, pakistan
There is a controversy among my collegues that during agarose gel electrophoresis the band that...
Can absolute zero (0 degrees Kelvin or -273.16 degrees Celsius) be registered on a thermometer,...
Why do we have five fingers? My idea is that one of nature's themes is "having enough." It's like a...
from Los Angeles
Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?
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...
Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...
I am doing some research on microarrays. I wish to know if mRNA's also have open reading frames as...
I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...
How did neutrinos get to be objects of such low energy? Neutrinos are supposed to have been...
Karl-Alexander berg brisebois
Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...
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