Are Sedna and Quaoar two new planets?
How can we re-magnetize old magnets when they've lost their power? We have a number of old magnets...
How does an analog ammeter works and how could I make one?
How many satellites orbit the earth? How many are used for weather forecasting? And what is the...
An anonymous reader
Who REALLY discovered oxygen? According to an National Public Radio program, in the 1850s 3 men at...
How long would it take for the Earth to freeze if the Sun burnt out?
Is the line spectrum that is produced by a fluorescent tube the result of some of the visible light...
from the Internet
Does water affect a magnet's strength? Do magnets lose their strength in cold temperatures? Are...
Does the temperature of a magnet affect its strength?
from Kooskia, ID
I have spent 4-5 hrs. attempting to magnetize some iron (Fe) washers using a 12V battery and...
Are we the center of the Universe? Does it always appear to an observer that he/she is at the...
from Markham, Ontario, Canada, Amérique du Nord
I was and I still am wondering if there are any really complex questions that even scientists...
Approximately how many nuclear tests do the americans alone conduct every year?
from Michigan City, Indiana
I have a small laser pointer. The spot produced by the beam is not a solid red circle, but a fuzzy...
Electricity. It powers almost all household appliances as well as the complex electronics we rely...
Why does a digital camera need a shutter- I think it should be able to electronically shunt the...
I am curious. What if two magnetic field lines were to intersect each other? What would this imply...
Since the Big Bang we see (with Hubert Reeves and other scientists) that matter has a tendency to...
Why does a balloon travelling inside a car seem to violate Newton's laws? Imagine a toy helium...
What is "time"? Does the word "time" in Physics have the same meaning as the word time in the...
from the Internet
What is inside an atom? In between the electrons and the neutron? Maybe if you pictured the atom as...
from Fort Knox
If the sun is a heat source, and as the sun gets closer to the earth the heat intensifies, then why...
from Tyler Texas
What causes a titanium headed golf club to spark when striking a golf ball? Is it the ball, the...
We were learning about colour and light when my teacher Mlle. Gelinas told us about this question...
Does a magnetic and/or electric field have an affect on water’s ability to flow (if you can't...
How can I construct a simple laser beam?
How does a pressure cooker work?
from Doussard, France
In my youth, I heard a story about an experiment: you compress a metallic spring and you put it in...
What exactly is gravity? Is it a wave or a ray? What exactly is the attraction that makes gravity...
What are the surfaces of Uranus and Neptune like? Is there wind or precipitation on either...
I'm doing a science project in which I'm trying to see if sound waves created by a computer...
from Mississauga, Ontario
If Pluto is not a planet, how is it classified? What is it called now?
If I knew the centre of the universe and began to travel toward it, would I begin to decrease in...
How do astronomers know the true position of stars? When astronomers show us pictures of the Great...
from Staten Island
How much energy in joules will be produced from an exploding mini black hole that is 10 micrograms...
from New York
Is it true that the moon moves away from the earth a few centimeters each year? Also do satellites...
There has been much mention of antimatter, such as antineutrinos. I was wondering what exactly...
When a nuclear particle radiates either an Alpha, Beta or Gamma praticle can that process be...
What is the chemical composition of basic aluminum, steel, and brass, and which metal conducts heat...
There is this question in my physics book asking me to check out the ways plants wrap themselves...
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