Why are the rockets launched only in the morning? Does earth's momentum or atmosphere has anything to do with it? - asked by: Kumar Alok
Can a rainbow appear at night? - asked by: Jason
What is a Synchrotron and how does it work? - asked by: Akash
What do u mean by eddies current or eddies? - asked by: fahadpk02
What is canonical variable and canonical transformation? - asked by: suguna
When and how did scientists discover that there was no oxygen in space? - asked by: Fran Corrigan
How does the mass of the sun vary over time? - asked by: Michael Heenan
How does the neutron possess a negative value of magnetic dipole moment though it is a neutral partical. - asked by: irshad
Who developed the 60hz power system in America, and why? - asked by: Dalton Watson II
What does the power rating of a microwave oven tell you? The higher the power rating the more microwaves are emitted? - asked by: Simon Foster
What are the functions of the primary and secondary circuits within an x-ray tube? - asked by: Nancy Keckler
If one penny and a stack of ten pennies are dropped at the same time in a beaker full of water which will sink first? - asked by: Nicole Litvin
What are the complete properties of plasma and the probability of plasma being applied in advanced technologies? - asked by: Brandon Webb
How far from Earth is Halley's Comet (February 2005)? - asked by: Scott Mabrito
Why is that the mass of a pendulum has no effect on its swing period? - asked by: Sharleen
What causes the hiss when a droplet of liquid lands on a hot surface? - asked by: Joey
How fast would the Earth need to spin before it fell apart? - asked by: Bali
What is the difference between an invariant quantity and a conserved quantity? Any examples? - asked by: Ryan Leong
I have been told that the sun burns off about five feet of its surface height per day. Is this true? - asked by: Johnny
Why is our solar system and galaxy virtually flat instead of spherical? - asked by: Keith DeLong
What kind of vehicles use eddy current braking systems and considering that the opposing force they create decreases as the vehicle decelerates, are frictional brakes always required as a back up system? - asked by: Alice Danielson
Does moonlight fade fabric? - asked by: Alexis
How fast and far would a space ship have to travel in order to establish a 1 second disparity between its time and time on earth? - asked by: Peter Stephenson
What keeps a frisbee stable during flight? - asked by: Tom Martin
How does a flourecent tube light work? How would you measure the amount of light that comes out of a flourecent tube light? - asked by: Yaseen Ghaffar
Why do planets or other bodies not display ion tails as they pass close to the sun, as comets do? - asked by: Patrick
How are the complex numbers used in fluid dynamics? - asked by: Naz
Is an error in a measurement caused by parallax, an example of random or systematic uncertainty? - asked by: Stella Nicolson
Can a laser be used to create a plasma, and can that heated plasma then be used for propulsion? How much energy would a laser need to accomplish this? - asked by: Derek Fell
Why does the e/m (charge/mass) ratio of electron not change and why does this change in case of protons , from element to element ? - asked by: Aashish Aroon
Does distilled water boil at the same temperature that regular tap water does? - asked by: Dale Everett
What is the smallest object visible with a light microscope? - asked by: Mike Carrigan
What effect/relation do inner core fires of planets (eg earth) have on their gravities? - asked by: Ravi
What are the differences in filling a party balloon with helium or nitrogen? - asked by: Robert
Can one make a magnet into a Mobius strip? - asked by: bob
Which element has the highest number of isotopes? - asked by: Brad
How do bubbles exist? I know that they are essentially just surface tension. At the same time, it takes soap to create a bubble, but soap eliminates the surface tension of water. With this information, how could it be possible for a bubble to exist? They seem to be contradictory objects. - asked by: Joey Duncan
Do the three laws of thermodynamics apply in any way inside an atom? - asked by: Peter
Why doesn't gold rust or tarnish? - asked by: Nick Thoman
I'm guessing a microwave oven would wipe clean and/or destroy a video tape. But what is actually happening? - asked by: Kevin Phillips
Does linearly polarised light give the same interference pattern when passed through Young's double slit apporatus. - asked by: Richard Coppack
Can light be slowed down to a complete stop? - asked by: Jon
How was the earths orbit changed by the giant impact that formed the moon? - asked by: Richard Collier
What is: Population Inversion, Different types of Coherence and Optical Pumping and how are they related? - asked by: Gurudas Mandal
What is a difference between Amorphous and Glassy solids? - asked by: Vinodkumar V Nair
What is a thermocouple - asked by: sree
Carl Sagan wrote about laser retroreflection from the moon which indicated a wooble there. Has anything else been done with it? Is there any reference books I can get about it??????? - asked by: Dolores Urquidi
Is it possible to use pulsating magnetic fields of a specific frequency at a predetermined temperature to excite hydrogen molecules in efforts to increasing their brownian motion to the extend of overcoming the inter-molecular strong nuclear forces and produce fusion? - asked by: Ning Hu
What is spin glass? - asked by: Ananda Kumar Das
Is it possible to determine the neutron kinetic energy by using the cerenkov effect? - asked by: J. mohseni
Is the earth shrinking in size ? - asked by: HARALD STOVER
What is the difference between magnetism and eletromagnetism - asked by: Lenny Ace Johnson
How does a diamond get its shine? - asked by: J. Bose
Does a 100% reflective mirror exist? - asked by: Howard Anderson
Why are the primary and secondary coils of a transformer wrapped on an iron core that passes through both coils? - asked by: Chantelle Morris
What wavelength is a black light? - asked by: Stuart Tsubota
What is the time interval between a high tide and a low tide? - asked by: Maile
How does a Faraday shield prevent RF radiation from passing through it, and are all frequencies attenuated by an equal amount with a given screen. - asked by: mack paulk
Is polorized light deflected by a magnetic or electric field, and if not, why not? - asked by: mack paulk
How does color affect the way a liquid heats up? - asked by: Alyssa Rogers
Has an experiment ever been performed that tests the propagation of gravity? - asked by: Michael Trotta
What is the difference between impedance and reactance? - asked by: Silvy Thomas
What is an isotropic medium? - asked by: Ogunsade Adedolapo
Why are lower frequencies(in sound)less directional than higher frequencies? - asked by: James
What is a leaf electroscope? - asked by: Akash
What is the difference between evaporation and vaporization? - asked by: Ron Wilcox
How fast must a steam turbine spin to generate electricity? ie. is there a minimum rotational velocity? - asked by: Justin Karakai
Why is caesium (Cs) the standard element used in atomic clocks? - asked by: Curtis Mitchell
How does one convert from Lumens on light bulbs to watts so that I can determine how efficiently the watts are being converted into light rather than heat? - asked by: Walter_Bradley
Why water is less dense as a solid than as a liquid? - asked by: Wing
How would a physicist describe their theory of symmetry? - asked by: Nicole Robinson
In an eddy current brake (spining disc and eclipse magnet) what effect do slits cut into the disc have? - asked by: Mike K
Why don't magnets do work? - asked by: jen
What is the hubble space telescope's design lifetime? - asked by: gregory dowdlist
Why does an inflated balloon travel in circles instead of in a straight path when its air is released? - asked by: rebecca
Is there a relationship between electrical conductivity and viscosity since both properties increases with temperature? - asked by: Evelyn
I am from England and have just been travelling through Mexico where every night just after the sun went down a very bright star could always been right above where the sun set. We called it the 'Western Star' what is it's real name? - asked by: Alex Wilson
How do nebulae get their colour? - asked by: Jen
Why is smoke silver in colour? - asked by: Adati Tarfa
How does temperature affect the resonance of a solid such as a tuning fork? - asked by: Marlene
Can you explain the thermodynamics of Fuel cell,in terms on how much work,heat and efficiency it produces compared to gasoline engine cars. - asked by: Javier
How many years does it take the Milky Way to spin around once? How did the scientists figure this out? - asked by: Pauline
How is it possible for virtual particles to become real in a vacuum if enough of an electrostatic force is supplied? - asked by: Andrew Austin
