| Subject | Date Asked | Expert |
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| strong nuclear force | 9/3/2008 | Steve Johnson |
Q: is that the bond due to strong nuclear force is greater between neutron-neutrons and neutron-proton ...
A: I said in my profile that I decline questions on relativity and Atomic Physics. I'm a high school ...
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| strong nuclear force | 9/3/2008 | Kevin Johnson |
Q: can there be strong nuclear force between electron or is it only between nucleons?
A: The strong force acts only between hadrons (the family of particles that the nucleons belong to) or ...
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| electrons slow down | 9/3/2008 | James J. Kovalcin |
Q: Apparently the motion of an electron around an atom nucleus resembles an endless motion. In other ...
A: I know this won't be very helpful, but our model of electrons asserts that electrons, like all ...
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| another bet | 9/2/2008 | Steve Nelson |
Q: in theory: I was once told that if you have a rifle in a vice at a specific height and also had a ...
A: In a classical approximation this statement is true. This is in a vacuum, and neglecting the ...
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| You'll have to split the bet -- you're both wrong | 9/2/2008 | Expert |
Q: In theory: if you were driving a car in space at the speed of light, and turned on the headlights ...
A: > if you were driving a car in space at the speed of light You can't drive a car at the speed of ...
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| Curious Physics Question about Paper | 9/2/2008 | Kevin Johnson |
Q: I fold a paper in half and prop it on a table forming a triangle, I then blow air through the ...
A: I am not sure if I have understood your setup correctly. If not, please ask a follow-up question to ...
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| egg drop container | 9/2/2008 | Steve Nelson |
Q: I need a good egg drop container for school all my ideas fail!!!!!!!!!!Must not use these items- ~ ...
A: My first thought is to use a bag of Jell-O. Simple, effective. Gel up the egg inside the gelatin. ...
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| electricity and power | 9/2/2008 | Steve Nelson |
Q: I have a 55 watt power source and need to power a machine. Is there a way to increase the power ...
A: There are many remote controls (look at your basic RC car with a manually-operated remote control) ...
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| electricity and power | 9/2/2008 | Steve Nelson |
Q: I have a 55 watt power source and need to power a machine. Is there a way to increase the power ...
A: Not with a standard computer. Most standard computer cases require at least 230 Watts of power at ...
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| alternating current in houses | 9/2/2008 | James J. Kovalcin |
Q: If the electricity current delivered to our houses is an alternating current it should reverse its ...
A: The "hot" wire in a circuit is the source of the force [EMF] that pushes and then pulls the ...
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| Physics | 9/2/2008 | James J. Kovalcin |
Q: How do i calculate the gravitational force between the earth and the moon. F= G m1m1/d2
A: As you have already noted, the force between two masses, m1 & m2, is given by: Fg=G*m1*m2/r^2 where ...
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| "Gravitational Constant" | 9/1/2008 | Steve Nelson |
Q: Sorry to bother you with what is probably a dumb question. But, if gravitational attraction between ...
A: The gravitational force is *approximately* constant in our human experience, because the distances ...
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| I'm not at all familar with sterling coinage | 9/1/2008 | Expert |
Q: why when i spin a pound coin can i see straight away which side it will land on ANSWER: Do you mean ...
A: > i can see it straight away > only with a pound coin I have absolutely no idea why this would be ...
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| air compression | 9/1/2008 | Steve Nelson |
Q: I have a steel tank 70 cubic feet in volume. I have an air compressor, output 900 CFM @ 350 psi. ...
A: Seems simple enough. The product of the absolute pressure (gauge pressure minus atmospheric ...
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| I'll keep trying to answer your philosophy questions | 9/1/2008 | Expert |
Q: 1.When we look at a apple? do we really "SEE" the apple with our eye? ...
A: > Do human see the real thing? Depends what you mean by the "real thing." Our eyes are not uniform ...
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| I'll need more info | 9/1/2008 | Expert |
Q: why when i spin a pound coin can i see straight away which side it will land on
A: Do you mean you can quickly detect that the coin is not spinning around a vertical axis, and thus ...
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| Dust on my TV screen | 8/31/2008 | Steve Nelson |
Q: As of late, dust has been forming on my TV screen in an odd manner. It forms in the exact center, ...
A: The same thing happens to my TV! There must be more static electricity building up in that region. ...
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| science symbols? | 8/31/2008 | Kevin Johnson |
Q: im looking into higher science, and ive encountered a few symbols i have never seen before. like the ...
A: Symbols can stand for different things in different contexts. There are no strict rules on what ...
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| lorentz transformation? | 8/31/2008 | Steve Nelson |
Q: what is lorentz transformation? and what do the symbols mean? and i have found 2 different equations ...
A: Well, technically the second one refers to a time interval and not an absolute time. But it's ...
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| electricity and magnetism | 8/30/2008 | Steve Nelson |
Q: . 1) sir convential current says it flows from positive to negative charge sir what is the positive ...
A: Positive charges in matter are protons. Atoms are neutral, because they contain equal numbers of ...
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| Physics | 8/30/2008 | Spaceman |
Q: A rolling ball moves from x1 = 3.4 cm to x2 = -4.2 cm during the time from t1 = 3.6 s to t2 = 6.1 s. ...
A: I normally avoid these kind of questions. Here is a URL which will provide some hints for you, ...
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| Some general info | 8/30/2008 | Expert |
Q: HOw do peole vent cold gases out of a place?Because for a hot gas chimney creates a stack effect by ...
A: There's one more piece of the puzzle I'll need -- the temeperature difference between the gas in the ...
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| Negative Ions & Himalayan Rock Salt Lamps | 8/29/2008 | Kevin Johnson |
Q: I'm told that negative ions "fall" to the ground. Is this true? If so, if I set my rock salt lamp ...
A: Some vendors of rock salt lamps claim health benefits from ions released by rock salt lamps. Their ...
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| physics | 8/29/2008 | Suresh Chandra Benjamin |
Q: we know that green is the primary colour but it can be made with blue and yellow colour so why it is ...
A: Yes, spectral green colour is primary and cannot be obtained by mixing any other spectral colours ...
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| physics | 8/29/2008 | Kevin Johnson |
Q: we know that the wave lenght of violate colour of suns light is the l?owest.so the scattering of the ...
A: the three different color receptors in the human eye have their maximum sensitivity at red, green ...
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| Why the sky looks blue | 8/29/2008 | Expert |
Q: we know that the wave lenght of violate colour of suns light is the lowest.so the scattering of the ...
A: I going to PRESUME what you're asking is, "If violet light scatters more than blue light, why is the ...
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| Removing cold gases from a building | 8/29/2008 | Expert |
Q: HOw do peole vent cold gases out of a place?Because for a hot gas chimney creates a stack effect by ...
A: You note correctly that it is the nature of hotter gasses to rise above colder gasses. Thus, as you ...
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| Negative Ions & Himalayan Rock Salt Lamps | 8/29/2008 | Kevin Johnson |
Q: I'm told that negative ions "fall" to the ground. Is this true? If so, if I set my rock salt lamp ...
A: The surface of the Earth has a negative electrical charge. But the charge density is very small so ...
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| LHC | 8/27/2008 | Kevin Johnson |
Q: im pretty sure you know what the LHC or CERN im worried because in 2 weeks they will start it up and ...
A: The scientists at CERN want to use the LHC to find out how our universe began and how it works at ...
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| circular motion | 8/27/2008 | Kevin Johnson |
Q: why does the motorcycle rider in loop a loop death wall moving in vertical circle does not fall when ...
A: the motorcycle rider in a wall of death is in a circular motion and thus experiences centrifugal ...
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| Response to a past question | 8/27/2008 | Steve Nelson |
Q: i tried to send a follow up, but it wouldnt work. my past question was about relativistic mass. and ...
A: You can measure it. Say you know its charge and you accelerate it across a voltage (to give it a ...
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| I want to ask you 3 question | 8/27/2008 | Steve Johnson |
Q: 1.When we look at a apple? do we really "SEE" the apple with our eye? ...
A: 1. "do we really "SEE" the apple with our eye?" The definition of the word "see" has been configured ...
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| I'll try to answer your philosophy questions | 8/27/2008 | Expert |
Q: 1.When we look at a apple? do we really "SEE" the apple with our eye? ...
A: All three of these questions are more related to philosophy, the discipline asking, "How do we know ...
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| Water flowing over distance through 6" pipe | 8/26/2008 | Kevin Johnson |
Q: Kevin, I'm considering installing a 6" pvc pipe from a free flowing ditch and running it straight ...
A: As I wrote to you before this is outside my area of expertise, but since you implore me to take a ...
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| Sciintillation | 8/26/2008 | Steve Johnson |
Q: This is a follow on to my previous question. 1) are there common household products (man is this a ...
A: Most of what I am able to do for you is give you links to material related to your interests. You ...
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| heat | 8/26/2008 | Spaceman |
Q: why is heat said a potential enery
A: Read the following extracts... 1. Thermal potential energy The thermal energy of an object is ...
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| gravitation | 8/25/2008 | Steve Nelson |
Q: few questions 1) why the earth's orbit is like an ellipse why it's not a circle? 2) if the pull of ...
A: It would increase in radius, which would sap some of the potential energy and slow it back down at ...
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| gravitation | 8/25/2008 | Steve Nelson |
Q: few questions 1) why the earth's orbit is like an ellipse why it's not a circle? 2) if the pull of ...
A: I'll try to answer them in order: 1) This is one of Kepler's observational laws. The orbit would ...
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| Bouyancy and Density | 8/25/2008 | Kevin Johnson |
Q: I'll read it up. Two questions: -Do ice and water have the same density? -Why does a helium balloon ...
A: -Do ice and water have the same density? Well, do ice cubes sink to the bottom, hover at constant ...
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| Bouyancy | 8/25/2008 | Kevin Johnson |
Q: I know that the Bouyancy Force is equal to the weight(mg) of the fluid displaced by the object. My ...
A: What the lecture means is that because of its large "hollow" parts (filled with air) a ship's total ...
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