D. Andrew White
Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the...
from the Internet
Is the orbit of the moon around earth a perfect circle? If not, when is the moon closest to us? ...
In dealing with bacterial resistance, should doctors use the strongest antibiotics now to kill off...
from Morris Plains, NJ
Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...
What are the most recent theories about what existed before our big bang? Have there been one or...
How does a lightstick work, and what are the chemicals involved?
Why do wet objects shine?
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...
How does sugar conserve food?
Which would hit a baseball further - a wooden bat or a aluminum bat? Why??
Why do we yawn when we see someone else yawn? Why is it contagious?
I've been doing a science fair project testing the effectiveness of Lactaid(TM) lactase. From a...
If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...
If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...
How much does a person's head or skull grow every year? If I'm 16, how much would it grow until it...
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
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...
My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...
Jerry E. Allen
Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....
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...
Can you tell me what the exact pH of the acid in our stomach?
Can air in the pleural cavity cause the lungs to expand more fully than they normally would?
from Andradas-MG- Brazil
When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...
At what speed does the world's slowest living thing travel? And what is the world's slowest living...
What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?
I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...
from Guwahati, Assam, India
Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...
Can absolute zero (0 degrees Kelvin or -273.16 degrees Celsius) be registered on a thermometer,...
When and how was the kaleidoscope made?
Are light and matter the same thing? Can you get matter from light?
How do scientists modify a virus so that it can be beneficial to a host cell? For example, during a...
When does each organ system of the human body reach full maturity?
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...
from lahore, pakistan
There is a controversy among my collegues that during agarose gel electrophoresis the band that...
I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...
Karl-Alexander berg brisebois
Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the...
How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...
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