Kaixin from Muar asks

Are Sedna and Quaoar two new planets?

Nancy Barkhouse asks

How can we re-magnetize old magnets when they've lost their power? We have a number of old magnets...

Tim Seeburger asks

How does an analog ammeter works and how could I make one?

Jeana Willis asks

How long would it take for the Earth to freeze if the Sun burnt out?

spandan jansari asks

How many satellites orbit the earth? How many are used for weather forecasting? And what is the...

An anonymous reader asks

Who REALLY discovered oxygen? According to an National Public Radio program, in the 1850s 3 men at...

m from the Internet asks

Does water affect a magnet's strength? Do magnets lose their strength in cold temperatures? Are...

paul valent from quakertown asks

Is the line spectrum that is produced by a fluorescent tube the result of some of the visible light...

Anna asks

Does the temperature of a magnet affect its strength?

Shauna from Winnipeg asks

Is snow a conductor or an insulator?

Jeff asks

Are we the center of the Universe? Does it always appear to an observer that he/she is at the...

Fran Barnes from Kooskia, ID asks

I have spent 4-5 hrs. attempting to magnetize some iron (Fe) washers using a 12V battery and...

Mireille Messier from Toronto asks

What's smaller, a quark or a neutrino?

Matt Hiemenz from Manitoba asks

Electricity. It powers almost all household appliances as well as the complex electronics we rely...

Kelvin C from Markham, Ontario, Canada, Amérique du Nord asks

I was and I still am wondering if there are any really complex questions that even scientists...

Melodia from Montreal asks

Approximately how many nuclear tests do the americans alone conduct every year?

Dave Carmean from Vancouver asks

Why does a digital camera need a shutter- I think it should be able to electronically shunt the...

Pete Peterson asks

Why does a balloon travelling inside a car seem to violate Newton's laws? Imagine a toy helium...

Paul Martos from Michigan City, Indiana asks

I have a small laser pointer. The spot produced by the beam is not a solid red circle, but a fuzzy...

Monty from saskatchewan asks

What exactly is gravity? Is it a wave or a ray? What exactly is the attraction that makes gravity...

Serge Bellemare from Montreal asks

Since the Big Bang we see (with Hubert Reeves and other scientists) that matter has a tendency to...

Dave Mackay from the Internet asks

What is inside an atom? In between the electrons and the neutron? Maybe if you pictured the atom as...

Todd asks

I am curious. What if two magnetic field lines were to intersect each other? What would this imply...

Yevgeniy Perev from Staten Island asks

How much energy in joules will be produced from an exploding mini black hole that is 10 micrograms...

Corey Conner from Fort Knox asks

If the sun is a heat source, and as the sun gets closer to the earth the heat intensifies, then why...

Arpa from Ubon asks

What is "time"? Does the word "time" in Physics have the same meaning as the word time in the...

Chris Hansen from Tyler Texas asks

What causes a titanium headed golf club to spark when striking a golf ball? Is it the ball, the...

Anonymous from Winnipeg asks

We were learning about colour and light when my teacher Mlle. Gelinas told us about this question...

Umit K from Cambridgeshire asks

How can I construct a simple laser beam?

Jonjon asks

How does a pressure cooker work?

Agin Thomas from Philadelphia asks

Does a magnetic and/or electric field have an affect on water’s ability to flow (if you can't...

Andre Szalinski from Doussard, France asks

In my youth, I heard a story about an experiment: you compress a metallic spring and you put it in...

Sara asks

What are the surfaces of Uranus and Neptune like? Is there wind or precipitation on either...

Michal Jaworski from Calgary asks

When a nuclear particle radiates either an Alpha, Beta or Gamma praticle can that process be...

Maeki Ray from Chicago,IL asks

I'm doing a science project in which I'm trying to see if sound waves created by a computer...

Jeff asks

How do astronomers know the true position of stars? When astronomers show us pictures of the Great...

Mateusz from New York asks

Is it true that the moon moves away from the earth a few centimeters each year? Also do satellites...

Srikar from Mississauga, Ontario asks

If Pluto is not a planet, how is it classified? What is it called now?

John Crowe from Dublin asks

If I knew the centre of the universe and began to travel toward it, would I begin to decrease in...

Ethan Heil from Salem, VA asks

I am doing a research project on the strength of different batteries. Is there a cheap way to test...