Physics

Kaixin From Muar, asks,

Are Sedna and Quaoar two new...


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Physics

Nancy Barkhouse asks,

How can we re-magnetize old magnets when they've lost their power? We have a number of old magnets the children use in hands-on...


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Physics

Tim Seeburger asks,

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


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Physics

spandan jansari asks,

How many satellites orbit the earth? How many are used for weather forecasting? And what is the maximum number of satellites the Earth can...


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Physics

paul valent From quakertown, asks,

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


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Physics

An anonymous reader asks,

Who REALLY discovered oxygen? According to an National Public Radio program, in the 1850s 3 men at the same time discovered oxygen and its use. They...


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Physics

Jeana Willis asks,

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


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Physics

m From the Internet, asks,

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


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Physics

Fran Barnes From Kooskia, ID, asks,

I have spent 4-5 hrs. attempting to magnetize some iron (Fe) washers using a 12V battery and insulated Cu++ wire coiled around them in every manner. ...


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Physics

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

I was...


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Physics

Melodia From Montreal, asks,

Approximately how many nuclear tests do the americans alone conduct every...


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Physics

Serge Bellemare From Montreal, asks,

Since the Big Bang we see (with Hubert Reeves and other scientists) that matter has a tendency to organize itself from quarks to atoms to molecules...


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Physics

Jeff asks,

Are we the center of the Universe? Does it always appear to an observer that he/she is at the center of the universe (note I said APPEAR...I do not...


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Physics

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 blotch seemingly made of a dozen tiny red spots. ...


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Physics

Todd asks,

I am curious. What if two magnetic field lines were to intersect each other? What would this imply about the forces that act on a charge moving...


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Physics

Matt Hiemenz From Manitoba, asks,

Electricity. It powers almost all household appliances as well as the complex electronics we rely on to execute complex programs. I am wondering...


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Physics

Pete Peterson asks,

Why does a balloon travelling inside a car seem to violate Newton's laws? Imagine a toy helium balloon centrally tethered inside a window of a van...


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Physics

Dave Carmean From Vancouver, asks,

Why does a digital camera need a shutter- I think it should be able to electronically shunt the image to the processing chip for a specified...


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Physics

Arpa From Ubon, asks,

What is "time"? Does the word "time" in Physics have the same meaning as the word time in the phrase, "What time is it?" and how do scientists know...


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Physics

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 tee, or striking the...


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Physics

Anna asks,

Does the temperature of a magnet affect its...


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Physics

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 a basketball, then there could be more atoms...


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Physics

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 an acid which dissolves the spring. What happened...


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Physics

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 are mountian tops, which are closer to the sun,...


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Physics

Umit K From Cambridgeshire, asks,

How can I construct a simple laser...


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Physics

Anonymous From Winnipeg, asks,

We were learning about colour and light when my teacher Mlle. Gelinas told us about this question she asked at a sciency lecture type thing. She and...


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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

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 answer that what about its affects on other aspects...


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Physics

Jeff asks,

How do astronomers know the true position of stars? When astronomers show us pictures of the Great Wall (or any celestial map for that matter), are...


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Physics

Srikar From Mississauga, Ontario, asks,

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


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Physics

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 (monotonous ring) could be redirected/misdirected/etc. by...


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Physics

Jonjon asks,

How does a pressure cooker work? ...


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Physics

Monty From saskatchewan, asks,

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


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Physics

Sara asks,

What are the surfaces of Uranus and Neptune like? Is there wind or precipitation on either planet's surface? Is there water on them? What's the...


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Physics

Mateusz From New York, asks,

Is it true that the moon moves away from the earth a few centimeters each year? Also do satellites move out of orbit because of the gravitational...


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Physics

Yevgeniy Perev From Staten Island, asks,

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


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Physics

James From Montreal, asks,

There has been much mention of antimatter, such as antineutrinos. I was wondering what exactly antimatter consisted of. How is it created, what is it...


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Physics

Michal Jaworski From Calgary, asks,

When a nuclear particle radiates either an Alpha, Beta or Gamma praticle can that process be reversed? For instance; tritium radiates a Beta particle...


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Physics

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 please state a few applications about inertia...


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Physics

Steve Arkin From San Diego, asks,

How is the spin imparted to a golf ball during the collision with a driver determined? The paradox is that many sources report "the gear effect"...


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Physics

luke kujawa From armada, asks,

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


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Physics

Sam asks,

There is this question in my physics book asking me to check out the ways plants wrap themselves around a pole, some wrap themselves...


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Physics

Toby asks,

I have seen in a TV show that by a very high magnetic force field even non-magnetic substances (like cups, mugs etc) levitate from the ground. What...


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Physics

JP From Chandler, asks,

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


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Physics

Lisa Pearce From Gympie, asks,

In winter in very cold countries like Canada and Finland, most rivers, lakes and ponds freeze over. Cars can be driven over lakes and the ice does...


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Physics

Salman Sattar asks,

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


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Physics

kaushik From bangalore, asks,

Why is the sky...


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Physics

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...


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Physics

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 then become more, as you walked up from the valley...


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Physics

Tracy From the Internet, asks,

Why is a magnet classified as dangerous goods when shipping by...


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Physics

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 center of the sun, how long would it take, taking...


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Physics

Mike Smith asks,

Can you help me with the physics of an amusement park ride called the Magic Carpet? The Magic Carpet is a ride where you sit on a platform (the...


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Physics

Francis From Ottawa, Ontario, asks,

I have been teaching high school science for 16 years and I am interested in knowing what you feel are currently the essential skills, knowledge and...


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Physics

Tamara Bain From Edmonton, asks,

My brother and I have a very important bet and it is about the following: If you remove the electrons from an atom will the atom shrink? For example,...


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Physics

Carl Hinton From Northampton, asks,

I was taught at school that the building blocks of all matter were quarks, yet a neutrino is at least 10 times smaller than a quark. How can this be?...


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Physics

Mireille Messier From Toronto, asks,

What's smaller, a quark or a...


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Physics

Shauna From Winnipeg, asks,

Is snow a conductor or an...


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Physics

Richard From Abilene, asks,

Are there any planned future deep space explorations planned say in the next 5 or so years. Surely with all the advancements in propulsion and...


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Physics

Sacha From Charleston, asks,

Yesterday I was watching "Hercules" with my little sister and now I wonder: Have the planets ever arranged in a straight line before? If they have...


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Physics

Daniel From SIngapore, asks,

Is it possible to focus gamma rays into one beam and then reflect it off an orbiting mirror onto a...


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Physics

Marnie From Burlington, Ontario, asks,

My roommate insists that the first day of Spring falls on March 21st every year, yet on the calendar and on the radio they said the first day of...


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Physics

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 been the mother of all black ...


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Physics

Shane C. asks,

Could you explain the idea that gravity could be thought of a depression or well, much like when a heavy object is placed on a blanket which is held...


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Physics

Richard From Flesherton, asks,

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


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Physics

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 a battery for factors like discharge, besides...


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Physics

David From Montreal, asks,

Is my counting right?: There are 76 elementary particles in the standard model: 6 leptons + 6 anti-leptons, 6 quarks + 6 anti-quarks, 8 gluons which...


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Physics

Aleksandr From Staten Island, asks,

If mini black holes would be produced at Cern (LHC) and in ultrahigh energy cosmic rays hitting the atmosphere, what would be the mass of those mini...


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Physics

JP From Tempe, asks,

If you had a seamless sealed box which was lined with a 100% reflective material, and somehow generated a light-source that would leave no trace for...


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Physics

C. Erik Grisham From Washington, asks,

Is there an exact relationship between Gravitational forces and Centrifugal forces? If so, is Centrifugal force basically the same as Gravitational...


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Physics

Lee Riffee asks,

With all that the U.S. military is doing by developing laser weapons as an anti-missile defense, I have been wondering if a laser beam could kill a...


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Physics

bruce marshall From Davie, asks,

In energy transformations, even on the subatomic level, is some energy always lost as thermal...


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Physics

darren liew From Singapore, asks,

How many times a year can you see the eclipse of the...


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Physics

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 filament inside with a laser, would this excite the gas...


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Physics

Jordan Green From Toronto, asks,

Today a girl in my class asked the question "Can you save yourself from an elevator falling 10 floors by jumping at the last second?" But that was...


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Physics

M Anderson asks,

If you could dig a hole from one side of the earth to the other passing though the core, what would happen to a ball dropped in at one of the ends...


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Physics

Tracy asks,

HELLO I have A VERY IMPORTANT EMAIL. THIS IS STRICTLY CONFEDENTIAL AND CONCERNS THE ENTIRE HISTORY OF FUTURE SPACE. MY NAME IS TRACY AND I HAVE BEEN...


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Physics

Yevgeniy Perev From Staten Island, asks,

If we assume that Whitten's new Twistor String Theory is correct, with no real extra demensions, will the mini black holes be produced at CERN, LHC...


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Physics

Mischa From Toronto, asks,

Black Holes, formed after the collapse of massive stars, are infinitely dense objects.Why is it called a "hole" as if it has no end. It must end...


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Physics

Ed From Kyiv, asks,

Against the black plastic on my TV, dust looks white; when I wipe it off with a white tissue, dust looks black. Why?...


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Physics

Richard L. Gibbens From Colorado, asks,

My question concerns the latest news about the Cosmological Constant. Has it now been established by the evidence beyond dispute that the distant...


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Physics

Darren Gough From Vancouver, BC, asks,

Have you ever hit the top of a glass juice bottle with your fist. It makes a very loud cracking sound. It's not the lid, and you don't have to hit it...


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Physics

Muhammad Zaid Khan From Karachi, asks,

How can the mass of earth be calculated and what are Newton's...


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Physics

Hugo Verissimo From Lisbon, asks,

We know that cosmic microwave background is 2.725 kelvin. We know universe was some 13Billion years old so we know that its radius is 13Billion...


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Physics

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 see it. Our puppy's water bowl outdoors has had...


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Physics

kevin van sprang From powell river b.c., asks,

Could it be possible that gamma ray bursts are the end result of a black holes energy bursting through the fabric of space and if that is true would...


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Physics

Gillian Seale asks,

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


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Physics

joe From Barrie, asks,

Who was the first to split the atom and what year?...


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Physics

James Horwood From Vancouver, asks,

How can I determine the size and configuration of magnets required to hold together two 500gm objects approximately 20cm square on opposite sides...


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Physics

hardik harsora From rajkot, asks,

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


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Physics

Elizabeth From Oshawa, asks,

How was life created and why did we start living on earth, or why was it the "chosen" place? i would like to know the answer or your opinion to tell...


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Physics

Susana From Germany, asks,

I would like to know why Russian rocket engines use 4 nozzles and American ones just one. What advantages and disadvantages are there? What other...


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Physics

Apurba Kanjilal From India, asks,

How are sparks generated from flint, quartz, and metals? What burns during a spark? How do the non-sparking tools prevent or reduce...


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Physics

R Clark From Prince George, asks,

Can any force be enacted upon a perpendicular slice of air molecules to attenuate the propagation of sound waves? I know that sound waves can not...


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Physics

Gord Vance From Ottawa, asks,

Could Uranium 238 be used in conjunction with photovoltaic cells in order to create a viable power...


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Physics

Lu Chen asks,

Where could I find some interesting facts and pictures on Christa McAuliffe? ...


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Physics

Vijay From Hyderabad, India, asks,

As an undergraduate computer engineering student, how can I best prepare myself for a career in space and...


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Physics

Erin Price asks,

How can I demonstrate the relationship between magnetism and organisms? ...


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Physics

Joey Bergen asks,

Do permanent magnets lose their strength when they are dropped and if so, why? I took two magnets that were the same strength and dropped one several...


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Physics

Tsiadimos Nick From Athens, Greece, asks,

I know that superconducting wires present their zero-resistance properties at low temperature (around 150 K). What is their ohm resistance at room...


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Physics

Donald W. Owens asks,

Can you explain the formula for computing the hydrogen burning lifetime of a star with 15 solar masses and luminosity of 10,000 x sun? My text says:...


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