Physics

Rehan Ahmed From Rahim yar Khan, Pakistan, asks,

What is vacuum ? How is it created because if we remove the air then the instrument in which we are making the vaccum it will break or contract? ...


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Physics

Dane Haas From Flesherton, asks,

What are the most recent solar storms and will they effect the Earth's...


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Physics

David Dexter From Mill Valley, CA, USA, asks,

This came up during a homeschool astronomy lesson: Why does the back of the Moon not have large impact craters as the front does? It would seem that...


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Physics

Marin From Split, Croatia, asks,

What happens when electrons pass through a magnetic field at a velocity near...


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Physics

Steven Hoaglund asks,

Galileo said, "in a vacuum, all objects fall at the same speed." Well, I have an idea that might prove him wrong. My idea goes as follows: Take a...


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Physics

David Keirsey asks,

How did neutrinos get to be objects of such low energy? Neutrinos are supposed to have been generated by the "big bang" and form part of background...


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Physics

Mike Noe asks,

Which would hit a baseball further - a wooden bat or a aluminum bat?...


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Physics

S.Leeberman asks,

How do I estimate the mass of an object when I know its volume and nothing more? For example, how would I calculate the mass of an F-14 Tom Cat...


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Physics

Ed Kasica From Oldsmar, florida, asks,

Why does a magnetic field in the form of a bar magnet effect the movement of a planaria? Does it have iron from its enviroment in its...


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Physics

Mike From Brussels, asks,

I have been doing an experiment in school and I don't understand why the following happens. When we place a charged object near running water from a...


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Physics

Steve Rock asks,

I'd like to model magnetic fields on my computer, but I can't find any software. Can you point me in the right direction? ...


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Physics

Cory From Victoria, Texas, asks,

Why are rail road pieces magnetized? Me and my friend noticed particles of steel and iron forming chains around the edge of large railroad peices...


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Physics

James Hope From Gloucester, asks,

I recently read a book on the big bang, and it said that protons and neutrons are made up of 3 quarks. It also said that up quarks have a + charge...


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Physics

Andrew From Friendly, asks,

Who was the first scientist to study...


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Physics

Ernie Epp From Kenora, ON, asks,

Collision of galaxie clusters. In recent news reports that I've read it has been reported that further proof of dark matter has been ...


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Physics

patric hedlund asks,

According to my family, a comet streaked through the sky the morning one of my uncles was born. His birthdate is June 23, 1931, 4 a.m., state of...


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Physics

Charles Tramble asks,

What can I use to block magnetic lines of force? I have been working on an rf transmitter project that requires a material that will stop magnetic...


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Physics

Gary Kolling asks,

What Satellite Galaxy is moving fastest toward the Galactic center? What Satellite Galaxy is moving fastest away from the Galactic center? What "arm"...


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Physics

Jesse From Ottawa, Ontario, asks,

Why do ceramic magnets lose their strength in extremely cold temperatures like dry...


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Physics

Jessica Reynolds asks,

Since there are no molecules within the vacuum of space to allow heat transfer, how can the air conditioning system of an astronaut's spacesuit...


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Physics

Zambi Donburi From Brisbane, Australia, asks,

Is it true that no mass can travel at the speed of light? If this is true, as you are nearing the speed of light, would you decrease in mass?...


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Physics

Gabriel From Winnipeg, MB, asks,

What is the distance from the sun for each of the elements in the periodic table where they would condense or melt? The key word is distance, the...


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Physics

Serge Bellemare From Boston, MA, U.S.A., asks,

Where in the universe are we? We seem to know the dimensions of the Universe; so does it have the shape of a ball or a football? We must be off...


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Physics

Gillian From Haliburton, asks,

I'd like to know what happens to radio waves once they have been emitted. Do they live forever? Stay in our atmosphere? If they stay in the...


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Physics

Furqan From Lahore, asks,

Why don't ordinary Silicon diodes emit light like LED's?...


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Physics

Liz Morice asks,

What makes the aluminum powder in an Etch-A-Sketch stick to the glass to make an...


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Physics

Edward Driedger asks,

How do touch lamps work? If one person touches the touch pad and someone else taps his other hand, will the light still...


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Physics

Pat asks,

If the earth stopped revolving would humans weigh less or more? Would there still be gravity on...


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Physics

Richard Hart From Victoria, BC, Canada, asks,

My wife asked me, "What does the sun burn and why doesn't it burn out?" I told her about helium fusion but then I got stuck. Why doesn't the whole...


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Physics

Kiran Gupta From Singapore, asks,

Why does a rare earth magnet fall slowly in an aluminium tube but it falls really fast when I toss it in air? Will all magnets fall slowly in a...


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Physics

Devin Steele From Pooler, asks,

This is an archery question. Does an arrow fly faster in the hot or cold? or... Does the hot or cold affect the flight of an arrow, if so...


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Physics

Paul From Romania, asks,

What i don't understand is why the intensity of the electric field is 0 inside a charged (empty on the inside) metal sphere. I know that the...


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Physics

Francis From Ottawa, asks,

When a ball is rotated at the end of a string in a horizontal circle (parallel to the ground) what balances the force of gravity to prevent the ball...


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Physics

Ed From Port Orchard, Washington, USA, asks,

Do magnets become less massive over time? It requires energy to hold a magnet on the refigerator door. If the magnet is losing energy it must also be...


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Physics

Kiana Stewart From Blacksburg, asks,

If Virginia sees a full moon in the daytime then do places like Australia see no moon at night?...


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Physics

Sara asks,

What happens to a compass when it is held exactly on magnetic north? Does it just...


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Physics

Fern Marques From North Bay, Ontario, asks,

How can planetary angular momentum be tranferred from one body (Earth's rotation) to another (Moon's translation around the Earth) by gravity alone? ...


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Physics

Chris From J-town, asks,

A friend at a party showed me that you can take a glass bottle, fill it with water, but not all the way, leave the neck of the bottle empty, screw...


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Physics

Marin From the Internet, asks,

Is it possible to create plasma using two high voltage electrodes , cathode and anode. Would air beetwen them ionize? How high the voltage needs to...


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Physics

Fester From Tacoma, asks,

I'm doing a science project and my topic is about the speed of sound. I was wondering if you might have a formula for speed of sound? ...


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Physics

Russell J. Wells Jr. From Dearborn Hts., Mich., asks,

Why is the efficiency of most all lasers limited to .1% to 30%? What are the limiting factors? What are some ways being researched to increase...


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Physics

kumar sah From Davis Ca., asks,

I want to explain to my 6 year old daughter, why the rainbow appears bent/arched in a semicircle in the...


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Physics

Duane From the Internet, asks,

If two magnets are in contact with each other or close proximity to each other either repulsing or attracting for a long period of time will they...


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Physics

Atalinder S. Bindra asks,

Is it possible to reach a black hole? What is the distance of the nearest black hole from earth? Is there any place, where the gravitational field of...


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Physics

George Murphy asks,

An article in the National Geographic magazine describes the Big Bang event as linear in form. Does that mean that when the big bang occured, that...


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Physics

Kay asks,

How can a star become small and dense enough to become a black hole? My understanding is that a neutron star forms when a star collapses and...


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Physics

Cristina asks,

How far is the Sun from Pluto? How long does it take for sunlight to travel to...


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Physics

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 velocity due to the increasing expansion of the...


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Physics

David Keirsey asks,

What are the quantum numbers that are involved in the distinction between matter and antimatter? I know that a particle and anti-particle must have...


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Physics

Alexis Rolling From Nampa, Alberta,Canada, asks,

Why was Mars...


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Physics

Roman asks,

How do scientists detect nutrinos when they have no mass and no charge? ...


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Physics

Willam Lockie asks,

What is the protocol used to determine where each country is allowed to put its satellites to avoid using the same location in space. What is the...


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Physics

Leo Capistrano asks,

How long would a single molecule of a radioactive element last? If the half-life of U-235 reduces its mass by half, and the resulting mass is also...


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Physics

Mauro Mavrinac From Ottawa, asks,

Given: a horizontal rigid tube with one end on an axis at a constant rotation. Insert a solid ball into the tube at the axis end. The ball will...


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Physics

Ben From the Internet, asks,

What exactly are Proton Spin Numbers, and how can you have a non-integer proton spin...


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Physics

Shayne Paterson From Lincolnshire, UK, asks,

I am currently researching EMP for a essay at my college. My essay is looking at possible non-lethal techniques in order to stop suicide bombers. The...


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Physics

Daniel Eyre asks,

How far is Pluto from the sun, and will we ever be able to travel to other planets, besides the...


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Physics

Zulfikar Yassim asks,

A black hole is created when a planet collapses and forms into a powerful vacuum sucking everything in. Can this type of energy be created? If this...


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Physics

Scott Livingston From Charlottetown, Prince Edward Island, asks,

Looking for pictures of Tranquility base or any of the other lunar landing spots on the moon taken from earths observatory. Or are they visible from...


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Physics

Saurabh From New Delhi, asks,

Gravity can produce motion in a body. Thus, it does work. But, for doing work, energy is needed. Does that mean every mass has energy? If not, which...


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Physics

Matt From Ottawa, asks,

Knowing the basic functions of magnets (dipoles, domaines...) I still don't understand WHY two magnets will be attracted together. What force will...


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Physics

George Chronis From Toronto, asks,

I have a few questions regarding Space-Time that have always confused me. I would very much appreciate if you could provide some...


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Physics

dina From Cairo, Egypt, asks,

I'm interested about light. I have two questions: What is the difference between scattering and reflection of light, and does a light with certain...


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Physics

Daniel From Singapore, asks,

Is there such thing as an Ice Bullet? A bullet that melts into the target so that there will be no trace of a...


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Physics

Gabby Stec From Harrisburg, asks,

Why, specifically, do ferrite magnets gain strength in low...


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Physics

Jessia From Ontario, asks,

How high in the sky would Polaris the North Star be, as seen from the North...


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Physics

Abhinav From Delhi, asks,

Why do all planets revolve in elliptical orbits around the sun? I mean in nature there existis symmetry, so they shouldn't they revolve in a...


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Physics

Tsiadimos Nick From Athens, Greece, asks,

If we put a current-carrying conductor inside a magnetic field (i.e. between two permanent magnets), a Lorentz force will be exerted on the...


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Physics

Jessica Muller From Hamilton, Canada, asks,

I have heard that some one discovered that the atom is actually made up of sound waves. Is there any truth to...


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Physics

Darren Connell From the Internet, asks,

We have the ability to use sound frequency to cancel out unwanted sounds, and since light is a frequency is there a way to use the opposite of...


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Physics

A F Jenks From Nelson, NZ, asks,

When a laser is bounced off the reflector Apollo crew placed on the moon, or any light is reflected back off a mirror 180 degrees, are they (a) the...


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Physics

From , asks,

I would like to know the basic principles of work of a solid state gyroscope, such as the ones used on radio controlled...


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Physics

missy cunningham From portsmouth, asks,

Every time we go to our local grocery store and get a buggy that does not have a chain hanging from it (which just touches the ground) we get shocked...


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Physics

Sara asks,

If the first dimension is length, the second is width, and the third is depth/height, what's the fourth dimension? Is there really a fifth...


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Physics

Dallin Shaner From the Internet, asks,

What is the scientific explanation of why a magnet's magnetism would decrease or increase when its temperature is...


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Physics

Becca Thompson asks,

What are the names and locations in the universe of known black...


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Physics

Betsy Kirk asks,

What is happening when someone plays a song on wine glasses? They are filled with different amounts of water which gives each one a different pitch....


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Physics

Richard Allan From Calgary, asks,

I am looking for information on the molecular level electromagnetic resonance frequency of various elements: gold, iron, aluminum, helium, etc. Has...


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Physics

Shane Harrison From England, asks,

I was watching a short documentary on how the Earth first came about. The part that was puzzling me was that scientists believed that the water on...


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Physics

Andy (Dionne) Setlow From Madison, Alabama, USA, asks,

I have long struggled to understand why the temperature of various wavelengths track so closely with magnitude shifts in Kelvin units. For example,...


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Physics

John D. Miller From Belmont, NH, asks,

I read that one can get a wider range of colors or shades if one uses the secondary colors: magenta, cyan and yellow than if one uses the primaries...


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Physics

Amelia Singh From scarborough, asks,

How are rocks made? What are the different kinds of...


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Physics

Gary Kolling asks,

What term is applied to all processes and physical measurements carried out under conditions of below-normal atmospheric...


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Physics

M Harish From Mumbai, asks,

Why does a bar magnet repel when it breaks?   ...


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Physics

Jonathan Weiler asks,

If atoms are so small, how can we split...


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Physics

Dr. X From Cornberry, asks,

I have made a theoretical discovery in my studies. It concerns vibrations of frame of reference in 4-dimensions to explain events such as the limit...


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Physics

E.H. From AOL, asks,

I understand about the Curie tempurature but I am wondering if an electromagnet has a Curie...


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Physics

Ahmad asks,

What are neutrinos and...


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Physics

Wayne Boutzale asks,

What are giant ice meteorites? Would it be possible for them to hit the...


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Physics

Linda Sanders From Catonsville MD, asks,

Why does my coffee flow more freely from a to-go cup when there are two holes in the lid instead of just the one hole for...


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Physics

Ruben From Miami, asks,

I would like to know if there is any way to magnetize a 6x4x1/2 inch ceramic 8 non magnetized magnet or if there are any companies that could do that...


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Physics

Chad Seibert From Poseyville, IN, asks,

How come you can boil an egg in a paper cup over hot coals and the cup does not burn...


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Physics

Neil O. From Oshawa, asks,

What can you tell me about the likelihood of a major solar storm in or around 2012, and how it would affect us here on earth? Also, when is it most...


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Physics

GRACE JAJA From the Internet, asks,

How long does it take radio waves to reach...


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Physics

Shagufta asks,

What are cosmic...


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Physics

Courtney asks,

How do mirrors work? What makes them...


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Physics

Gary John Walsh asks,

What is a blue moon? When will the next one be? Are there ever two in the same...


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Physics

Olivia From Sydney, asks,

I was wondering about planet orbit paths and if they change. I read that a change in the Earth's orbit path may have caused the Ice Age, but I still...


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Physics

Arnaldo From montreal, asks,

Is it possible make the aluminium transparent...


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Physics

Mouabbi Rami From Athens, asks,

Why do most industrial LASER diodes emit pulsing light beams and not continuous ones? And what is the physical explanation of the coherent light...


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