Srikar from Mississauga, Ontario asks

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

James from Montreal asks

There has been much mention of antimatter, such as antineutrinos. I was wondering what exactly...

Heidi from Malaysia asks

Could you please tell me what is inertia? Will it bring us more good than bad in our life? Will you...

luke kujawa from armada asks

What is the chemical composition of basic aluminum, steel, and brass, and which metal conducts heat...

Michael Parks from Scotch Lake, Cape Breton, N.S. asks

If nothing can escape from a black hole, how come we are here? The big bang must have...

Steve Arkin from San Diego asks

How is the spin imparted to a golf ball during the collision with a driver determined? The paradox...

Nick from Melbourne asks

I'm wondering if I have a tube filled with argon gas, or some other inert gas, and heat up a...

Aleksandr from Staten Island asks

If mini black holes would be produced at Cern (LHC) and in ultrahigh energy cosmic rays hitting the...

Mike Smith asks

Can you help me with the physics of an amusement park ride called the Magic Carpet? The Magic...

David from Montreal asks

Is my counting right?: There are 76 elementary particles in the standard model: 6 leptons + 6...

Richard from Flesherton asks

What are the causes of Northern Lights? Do they have any relation to the green-house gasses in the...

Francis from Ottawa, Ontario asks

I have been teaching high school science for 16 years and I am interested in knowing what you feel...

JP from Chandler asks

Given that the Earth's magnetosphere is what protects us and all life on Earth from the deadly...

Sam asks

There is this question in my physics book asking me to check out the ways plants wrap themselves...

Lisa Pearce from Gympie asks

In winter in very cold countries like Canada and Finland, most rivers, lakes and ponds freeze over....

Tracy asks

HELLO I have A VERY IMPORTANT EMAIL. THIS IS STRICTLY CONFEDENTIAL AND CONCERNS THE ENTIRE HISTORY...

Sacha from Charleston asks

Yesterday I was watching "Hercules" with my little sister and now I wonder: Have the planets ever...

Tamara Bain from Edmonton asks

My brother and I have a very important bet and it is about the following: If you remove the...

Allan Miller asks

I am studying tension and compression in support structures such as hammocks and diving boards. The...

Toby asks

I have seen in a TV show that by a very high magnetic force field even non-magnetic substances...

Marnie from Burlington, Ontario asks

My roommate insists that the first day of Spring falls on March 21st every year, yet on the...

C. Erik Grisham from Washington asks

Is there an exact relationship between Gravitational forces and Centrifugal forces? If so, is...

Dom Elbon from Nottingham, England asks

Is gravity lumpy? If you were standing in a valley, then on a mountain, would your weight be less...

Hammad from Phoenix asks

If one were to drop an item on the surface of the sun, assuming the object could free fall to the...

Carl Hinton from Northampton asks

I was taught at school that the building blocks of all matter were quarks, yet a neutrino is at...

Richard from Abilene asks

Are there any planned future deep space explorations planned say in the next 5 or so years. Surely...

Hugo Verissimo from Lisbon asks

We know that cosmic microwave background is 2.725 kelvin. We know universe was some 13Billion years...

JP from Tempe asks

If you had a seamless sealed box which was lined with a 100% reflective material, and somehow...

Bobby from Oak Ridge asks

I would like to know what causes inverted icicles. I have a photo I've just taken if you need to...

Yevgeniy Perev from Staten Island asks

If we assume that Whitten's new Twistor String Theory is correct, with no real extra demensions,...

Gillian Seale asks

What was Dennis Gabor's theory on holography and how did he came up it?

hardik harsora from rajkot asks

1) How do we identify the age of any object in space like galaxies, etc.? 2) What technology is...

A. S. Kaire from Quezon asks

If the earth were suddenly stopped in its orbit, how long would it take for it to fall into the sun?

Tracy from the Internet asks

Why is a magnet classified as dangerous goods when shipping by air?

Lee Riffee asks

With all that the U.S. military is doing by developing laser weapons as an anti-missile defense, I...

M Anderson asks

If you could dig a hole from one side of the earth to the other passing though the core, what would...

Salman Sattar asks

I am a novice and I am looking to buy a telescope for around $350. Which one would be better for...

Susana from Germany asks

I would like to know why Russian rocket engines use 4 nozzles and American ones just one. What...

R Clark from Prince George asks

Can any force be enacted upon a perpendicular slice of air molecules to attenuate the propagation...

Mischa from Toronto asks

Black Holes, formed after the collapse of massive stars, are infinitely dense objects.Why is it...