Physics

Vijay From Hyderabad, India, asks,

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


Read the answer...

Physics

Erin Price asks,

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


Read the answer...

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...


Read the answer...

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...


Read the answer...

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:...


Read the answer...

Physics

Linda Horsman From Gibsons, BC, asks,

What is the cause of static electricity? Also, I'm doing research for a book and I wanted to know if people have small amounts of electrical activity...


Read the answer...

Physics

Leo Molenaar asks,

Is the up and down movement of a piston in a combustion engine a waste of impulse energy? The piston has to slow down to a stop then accelerate to...


Read the answer...

Physics

Jackie B. From Wisconsin, asks,

Which metal conducts heat the...


Read the answer...

Physics

Allan Miller asks,

I am studying tension and compression in support structures such as hammocks and diving boards. The trees supporting a hammock are compression...


Read the answer...

Physics

Willi Luke asks,

I am currently doing research on the e-bow, a guitar effect that calls upon an infinite feedback loop to produce infinite sustain by keeping the...


Read the answer...

Physics

Adam Moore From Denver, Colorado, asks,

I am in the 6th grade in Denver, Colorado. I made a machine out of 2 by 4s that will kick a ball. I want to see if air pressure in a ball has an...


Read the answer...

Physics

Travis Cheeseman From Bloomington, IND., asks,

Ok, this is my project: I have put roughly two cups of rice in a sock and threw it in the microwave for four and a half minutes, it kept its warmth...


Read the answer...

Physics

Steve Clarke From Essex, England, asks,

What will happen when individual IC (integrated circuit) components reach the size of atoms and can't get any...


Read the answer...

Physics

Chris Chase From Harrisburg, asks,

Has anyone ever weighed nuclear reactions in reactors to see if the reactor weighs more while generating energy? Specifically, I am interested if...


Read the answer...

Physics

Eddie From Toronto, asks,

I know the basic details of how an ionization smoke detector works, where particles enter the chamber and block the alpha particles so that the...


Read the answer...

Physics

Karan Rustagi From Ontario, asks,

I heard that electricity can be transmitted in other forms than electron flow; like electromagnetic beams. This way we could power appliances or...


Read the answer...

Physics

Gordon From Oakville, Ontario, asks,

I was studying for a science exam and stumbled across a chapter that covered energy. The chapter states that for a flame it can have different colors...


Read the answer...

Physics

Brian From Avon Lake, asks,

I am doing a report on aluminum and the impact it has on our environment for a science class. Do you know how aluminum is disposed of? And if it...


Read the answer...

Physics

Kushagra Bhargava From Jaipur, asks,

Sir please tell me how the lghtwaves gets their momentum or how they come into...


Read the answer...

Physics

KENNETH HICKFORD From LONDON ENGLAND, asks,

(1) What quantities of the earths atmosphere are lost to outer space over a given time? (2) how much is added to the earths mass by meteorites and...


Read the answer...

Physics

Marty Ellis From Pittsburgh, asks,

Can a sintered ore magnet be re-magnetized in a different configuration of its poles? Does it need be heated to its Curie point to be easily...


Read the answer...

Physics

Ian Gordon From Exeter UK, asks,

Why are sounds so much louder downwind, even when the wind is...


Read the answer...

Physics

Eduardo From Pembroke Pines, asks,

Is it true that gas particles at higher altitudes are farther away from each other than at lower altitudes, and, if this is true, does it apply to...


Read the answer...

Physics

Azadeh From Tehran, asks,

If we heat a square metal page with a circle hole in the center of it, what will happen to both the square and the hole size after...


Read the answer...

Physics

Amanda From Thunder Bay, Ontario, asks,

What is colour? How does the brain perceive...


Read the answer...

Physics

mark irvine From sacramento, asks,

If you have a square 1 pound block with a front flat surface strike a ball, would it be the same as if you had the same weight block, but cut out in...


Read the answer...

Physics

Charles Kern From Detroit Lakes, Michigan, asks,

Is there a high permeability magnetic shield that does not have iron in...


Read the answer...

Physics

Cheryl From Chesapeake, VA, asks,

I teach moon phases to my third graders. On posters, in textbooks, and online, I have seen differing depictions. When looking at the moon from the...


Read the answer...

Physics

Will McAbee From Pendlton, asks,

How does a atom split and how does it create such a big explosion? Also how can I split an atom at...


Read the answer...

Physics

Anonymous asks,

How can I create a real light saber? It does not have to be completely like the ones in the movie but it must be in a sword shape, able to stop...


Read the answer...

Physics

Sara From Antigonish, Nova Scotia, asks,

How does the earth stay in the same place in...


Read the answer...

Physics

Margaret Klima asks,

What are the globes which, when you puts your hand close to them, display electrical energy resembling lightning? How do they...


Read the answer...

Physics

steve abel From Seattle, WA, USA, asks,

Can you explain the meaning of the phrase: " has cleared the neighbourhood around its orbit.” I have read that Pluto is no longer considered a...


Read the answer...

Physics

Tracy Weddell From Bakersfield, CA, asks,

Do neutron stars evolve further? Charts of star evolution always show the neuton star as the last stage in the life of some high mass stars. But...


Read the answer...

Physics

Alicia asks,

What would be the appearance of the moon if it were in the western sky just after sunset? Why would a full moon always be rising just as the sun is...


Read the answer...

Physics

John Collins From West Vancouver, asks,

(Re: E=Mc^2) Why does E/M=c^2 rather than simply c^1 (which is an altogether respectably large number) or c^3 (which defines a spatial volume rather...


Read the answer...

Physics

Sahm Atman From Berkeley, CA, asks,

I understand why magnetism is a relativistic effect, "caused" by Lorenz contraction effectively increasing charge density. I have also read that in...


Read the answer...

Physics

Ryan Martinez asks,

Why do magnets erase magnetically recorded data? Are there some generally accepted guidelines for safe distances you can place audio tapes (video...


Read the answer...

Physics

Yevgeniy Perev From Staten Island, asks,

How much energy did the highest energy neutrino detected so far have?...


Read the answer...

Physics

Karl-Alexander Berg Brisebois From Dunham, asks,

Conservation of momentum can explain the exchange of a virtual photon between two electrons and the repulsive force that results. But it cannot...


Read the answer...

Physics

D. Andrew White From Toronto, asks,

Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the orbital energies somewhat different because of charge...


Read the answer...

Physics

Michal Jaworski From Calgary, asks,

A black hole is a central point the size of a pinhead where a huge amount of mass is concentrated. If, by the two equations F=(GMm)/r^2 and...


Read the answer...

Physics

Sahm Atman From Berkeley, asks,

Supposedly in classical electromagnetism an accelerating charge radiates. If so, why? If so, then does an observer in the accelerating frame "see"...


Read the answer...

Physics

Sylvain Koenig from the University of Lausanne (Switzerland) asks,

Why would one person when he returns from travel at the speed of light have aged differently than someone else who stayed...


Read the answer...

Physics

Corinne Keffer From Halifax, NS, asks,

I have a liquid crystal display screen computer monitor. I am looking for unbiased information on the chemicals in my flat screen. I would like to...


Read the answer...

Physics

BALKRISHAN ARORA From Pune, India, asks,

1. I would like to know when was Hubble's constant discovered / invented? 2. How many times it was changed? 3. The names of the scientists who...


Read the answer...

Physics

Ryan From Maryland, asks,

I'm doing a science experiment with magnets and was wondering, do magnets lose their strength over time? Also, what is the most powerful magnet I can...


Read the answer...

Physics

Stephen Ross From Hong Kong, asks,

1) Which of the following two options is more widely accepted by the scientific community? a) Elementary particles actually exist in quantum states...


Read the answer...

Physics

Markovic Ljiljana asks,

When and how was the kaleidoscope...


Read the answer...

Physics

David Graveline asks,

What are the most recent theories about what existed before our big bang? Have there been one or even several ones before this one...


Read the answer...

Physics

Serge Bellemare asks,

Do all planets and stars rotate on themselves, and do we know...


Read the answer...

Physics

Harry Pritchard asks,

How can I find out whether it takes more effort (work by pump) to increase the air pressure in a tire from 60psi to 80psi if the tire is under...


Read the answer...

Physics

justine van der Werf From Tiaro, asks,

I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes paramagnetic and it has magnetic properties much...


Read the answer...

Physics

Darrin asks,

If light is made of photons, and photons have mass, and many photons of light are hitting the earth from the sun, shouldn't the earth be getting...


Read the answer...

Physics

Lee Ming Fei asks,

Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...


Read the answer...

Physics

Matt From the Internet, asks,

Is the orbit of the moon around earth a perfect circle? If not, when is the moon closest to us? What about farthest from...


Read the answer...

Physics

Kjell From Edmonton, asks,

Does light exert...


Read the answer...

Physics

Citre asks,

What kind of weather is on Mercury and Saturn? Does it rain or snow on these...


Read the answer...

Physics

Derrick Smith From Jacksonville, asks,

In science fiction it is common to see P-P fusion, but my reading seems to indicate it is inefficient compared to other forms of fusion. If we could...


Read the answer...

Physics

Hongyi Li asks,

Does antimatter's gravity have the same properties ordinary...


Read the answer...

Physics

Benoît Mailhot asks,

Are light and matter the same thing? Can you get matter from...


Read the answer...

Physics

Aaron Johnston asks,

What would make it possible for a man to move through solid objects? Is it at least in theory possible for a man's molecules to fit between the...


Read the answer...

Physics

Ron Belmont asks,

How do you calculate potential energy for an object which is sitting on the floor? PE=mgh, which means that potential energy is equal to mass x...


Read the answer...

Physics

Chris asks,

Can absolute zero (0 degrees Kelvin or -273.16 degrees Celsius) be registered on a thermometer, since there is no heat or movement of atoms? If no...


Read the answer...

Physics

peel From the Internet, asks,

What would happen if the nucleus of an atom contained too many or too few neutrons, or even none? Can you please list some facts about the nucleus...


Read the answer...

Physics

YIanni Mitropoulos From Melbourne, asks,

If a sound is played to a person over a period of time, is there a way to work out (or to estimate) the percieved loudness of it at any point in...


Read the answer...

Physics

James Hope From Gloucester, asks,

I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235 fission releases 206MeV like this: Fission...


Read the answer...

Physics

Donald From Halifax, asks,

If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light … explain why not? ...


Read the answer...

Physics

Russell Westhaver From Vancouver, asks,

I've got a question about light. As I understand it, light is a particular form of energy--in order for something to produce light, energy of some...


Read the answer...

Physics

nijin k From Khd, asks,

What is the heat wanted to melt the hardest substance in the...


Read the answer...

Physics

Dan Hurtado From Tallahassee, asks,

Can you explain the process by which hot materials emit light? Particularly, why is infrared light associated with heat, (especially since infrared...


Read the answer...

Physics

Marcel Leone asks,

Is gravity considered to be one of the forms of energy such as electricity, heat, light, mechanical, etc.? ...


Read the answer...

Physics

Yamna From Dubai, United Arab Emirates, asks,

1.) Do the intesity of the sun's rays increase the current in a solar cell? 2.) Does increased current affect the amount of electric power produced...


Read the answer...

Physics

Pierre Charbonneau, Eng. From Jonquière, Quebec, Canada, asks,

Is there actually a strobe light on the International Space Station? I saw in the sky a sequence of two closed flashes cycled on approximately ten...


Read the answer...

Physics

Karl-Alexander berg brisebois From Dunham, asks,

Heisenberg's uncertainty principle tells you that the mass of a particle multiplied by the imprecision of its position mutiplied by the imprecision...


Read the answer...

Physics

A. D. asks,

I am interested in the age-old debate on whether a person gets wetter by walking in the rain or by running. I would like to compare the results of...


Read the answer...

Physics

Rod From canterbury, asks,

Is there any magnetic shielding material which is not itself attracted by a...


Read the answer...

Physics

Luke asks,

A question about tri-coil atomic fusion/fision... If one used positive and negative ionized plasma, would these have enough attraction to tear apart...


Read the answer...

Physics

Tyler Salo asks,

When rockets were sent to Jupiter, did scientists get any readings? Does Jupiter have a solid surface, or is it just a big ball of...


Read the answer...

Physics

Yevgeniy Perev From Staten Island, asks,

When our galaxy will absorb the 2 Magellanic Clouds, that will produce a starburst. For how long will it take for that starburst to die down? Will...


Read the answer...

Physics

Elise asks,

I have done lots of research on auroras and I understand almost every thing about them. The basic facts are that once the protons/electrons from the...


Read the answer...

Physics

Gregg Echols From Phoenix, asks,

What are the temperatures reached at the focused point of a magnifying glass, when using the sun as the power source? I know it would probably...


Read the answer...

Physics

Andrew Hickey asks,

Why do wet objects...


Read the answer...

Physics

Jen Collard From Brockville, asks,

Light cannot escape from a black hole, because of the black hole's mass. If this is true, then light must be affected by mass. Would it not then be...


Read the answer...

Physics

Pablo Ros asks,

I have been charging a leyden jar with an electrophorous (pieplate and cup) and was wondering how the charges from the electrophorous travel ...


Read the answer...

Physics

Vasu From London,ON, asks,

Is it possible for a singularity to form outside a black...


Read the answer...

Physics

Arnaud Bigeu asks,

How does the static universe theory (Gamow, Hoyle...) explain the 3K cosmic background radiation. Also, each time I see a astronaut in space, he...


Read the answer...

Physics

Anonymous From Ajax, Ontario, asks,

If mass can be converted to energy by using E=mc2, how can energy be converted to...


Read the answer...

Physics

Nathaniel P. Luga From Cebu City, asks,

What chemical or chemicals that can desolve a strong concrete structure, and what is its mixture if any and also how it is...


Read the answer...

Physics

Thomas From Middlesbrough, Australia, asks,

How many times can you split up an...


Read the answer...

Physics

Jonas Malmgren asks,

Is the interstellar space between the galaxies completely empty? Not even a single star or a...


Read the answer...

Physics

Fred Bucheit asks,

How does mass shifting affect Earth's rotation? Could melting of polar icecaps cause a change in rotation? ...


Read the answer...

Physics

Eric Cashmore asks,

What is the name of the most recent planet discovered, and where is...


Read the answer...

Physics

Robert Cunningham From Dallas, Texas, asks,

If you shine a light through a glass of water, the light slows down. What makes it speed up again after it leaves the glass of...


Read the answer...

Physics

Stanley Jeffs From Cortona, asks,

I have been reading Feynman and what he says seems to make sense to me, in particular:
photons are particles
photons do not travel in...


Read the answer...

Physics

Gaston Fournier asks,

NASA has recently detected the presence of ice on the moon. Since the moon is surrounded by void space, how is it that that ice has not been...


Read the answer...

Physics

Jayde From Surrey, asks,

What is the field of cryogenics? What kind of occupation is available in...


Read the answer...

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? ...


Read the answer...

Physics

David Howard From UK, asks,

Can you tell me whether it would be possible to launch a spacecraft into orbit using a giant catapult? I can see no reason why not. Obviously any...


Read the answer...

Physics

Dane Haas From Flesherton, asks,

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


Read the answer...
1 2 3 4