Effects Definition and 963 Threads

I am obtaining data with a sample rate of 6250 samples/second on a digital oscilloscope. Ideally, I am obtaining a sinusoid output through a system from a sinusoid input. My expected results through the system are lower in amplitude than I am actually recording. I have some reasons for why...

What happens with causality at the Planck scale? Can effects "precede" causes? I would like to know what happens with causality at the Planck scale, explained in "educated layman" terms, if that's possible... :) Might effects "precede" causes in time? Do we have to redefine causality at the...

Homework Statement This is starting to get a bit trick because of mixed information. Anyways, does anyone know the effects of osteoporosis in terms of short term versus long term? Homework Equations N/A The Attempt at a Solution Spine fractures caused by osteoporosis are likely...

Hi.. Im trying to figure out what the affect of HCl on a magnesium strip at different concentration levels has? I can't figure out a 'scientific' response and therefore can't formulate a hypothesis :/ Any help will be appreciated.

This may be a simple question for some of you but it has baffled me for a long time. When we say that spacetime is curved, do we mean that from a flat space of a higher dimension, our spacetime would appear curved, in the same way that the surface of a sphere looks curved when viewed from...

Please clarify the following view: An EPR-Bell experiment - when one particle in a Bell correlation is measured, this instantaneously affects the properties of the second particle. To me this seems as if information concerning the measured particle has "arrived without travelling" to the second...

I was curious as to how planetary type spherical bodies form. Specifically, I was curious as to how the gravity affects the nebulous particles moving within themselves just prior to a solid planetary body forming. Is it not true that gravity is essentially zero in the center of a planetary...

When a pendulum is moving will the length of the string that the bob is attached to appear to be contracted?I have this doubt as the string is sometimes in direction of motion and at one point absolutely not in the direction of motion

If the star ionizing an HII region suddenly doubled the radiation emitted, would that increase or decrease the temperature? I feel like the expansion of the region would cancel out the increased energy, but I don't know.

Homework Statement n a Rutherford scattering experiment a target nucleus has a diameter of 3.5 10-14 m. The incoming has a mass of 6.64 10-27 kg. What is the kinetic energy of an particle that has a de Broglie wavelength equal to the diameter of the target nucleus? Ignore relativistic...

Wasn't sure if this is exactly the right place for this, but it seemed the most relevant. Homework Statement Ok, I've recently started some research for my A-Level project, and I decided to look into the polarising effects of plastics. When two polarising filters are positioned one after the...

Why is it that in a formula: f(x)=2x^4...), why is it that the exponent actually BENDS the line that the fomula makes when it is graphed? I know about the high and low point in algebra two (that's what I'm taking), but i just want to know WHY does an exponent BEND the line? CD

Andre, this is mainly concerning your work, especially with your claim that CO2 is not a gas that causes global warming. From what I have gathered (and I hope I don't make a fool of myself by saying this) but you have argued that CO2 levels have risen over periods of cooling in the past...

In the 1999 paper published in Nature by Markus Arndt et al entitled "Wave-particle duality of C60 molecules" he states: The fullerenes are of course in this funny state of superposition as they are 'falling'. Couple questions: 1. Is this drop of 0.7 mm identical to what any object...

I am having trouble understanding the concept of the effects on an orbit. The question asks if we replaced the sun with a rock of the same mass, would Earth's orbit change? I think it doesn't because orbits don't change because of its orbital energy. but I'm not sure because i wonder if the...

Hi! My Physics introductory book states the following: "A dew point is a state defined by the temperature to which the air has to be cooled isobarically (with constant absolute humidity) for the vapour to become saturated." Humidity is defined as m/V, where m is weight of the vapour, V is...

Is it possible to remove a proton from an atom and then as a result will the element of the atom will change? Would anything else need to be remove to keep an equal balance in an atom, ex. neutron or electrons? How much radiation would be created by removing a proton.Is more rediation...

Hey, I was just wondering if anyone knew of the specific effects a typical bathroom cleaning product would have on a human even with just a little exposure to the skin? Is it still hazardous to the blood stream and mucus membranes?

What does modern physics say about "uncaused" effects The old Cosmological argument says that everywhere we see an effect like motion or change we see a cause. This is a useful way of looking at everyday things. It goes on to say that regressing they form a chain. This is something we...

Hello all, I am doing a high-school grade science fair on the effects of aging on synesthesia. Well, at least that's what it tests, but in reality, it's the other way around, almost. Synesthesia, while, indeed, being a genetic condition, is a condition of the brain. Therefore, if the brain is...

If the sun were to explode would the effect on Earth be simultaneous or would the explosion of the sun affect the Earth after eight minutes

Hi, I'm not sure if I'm at the right place to write this message, so please excuse me if I'm not. I have read a bit about tidal forces, but I still don’t understand what they are, how they act on different body masses, etc. So, I thought I could find answers here. I would greatly appreciate it...

Hello, I was curious about any thoughts any of you might have concerning an interesting result I found today. While I was annealing a 32 cm wire of nitinol at about 300 C, which for its diameter is about 1 amp, I noticed that when the wire was made less tense, it moved up and down...

Because if would seem to me, that planets suffer relativly little disturbance from these collisions, that is, they're not pulled away from their main star, by other massive objects passing nearby. (Or in most cases they're not) During the 4 billion year history of our solar system, the Earth and...

Homework Statement an air bubble originating from a scuba diver at a depth of 18.0m has a diameter of 1.0cm. What will be the bubble's diameter when it reaches the surface? assume constant temperature Homework Equations I'm not sure what equation to use for this... The Attempt...

Last night I watched a program on TV that made the statement that in the interior of our sun the gravity is so intense that a photon of light can travel only several thousandths of an inch per minute. It takes hundreds of thousands of years for a photon of light to travel from the interior of...

Hi there, Can anyone answer a few questions I have about chernobyl and related. I am doing some research on something related, and its hard to get good information about this. Here they are. 1) - Can someone explain the steps of the disaster? I mean, let's say is the cooling system...

This is a fairly simple question. I have some ideas of the implications but I have no idea what the total effect would be. My idea is to take an extremely powerful magnet. The strongest magnetic force that we can aqcuire. Then you take it into the vacuum of space and spin it so that north...

when a satalite orbits the Earth my text states that it is constantly falling into the Earth as it moves tangentially -- my question is why doesn't the speed of the object falling into the Earth increase radially since it is acted upon by the force of gravity, a force of gravity would cause an...

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Forgive me if this is anything but trivial, but my physics teacher said in his lecture the other day that gravity has nothing to do with a pendulum coming to rest? how could this be? according to him, the reason for the pendulum coming to rest is air, but when i inquired about puting one in a...

The Earth takes the shape of an oblate spheroid due to its rotation and so gravity is stronger at the North/South Poles while the Equator has a velocity relative to the Poles. When we consider General Relativity (the effect of gravity on the passage of time) together with Special Relativity...

Seriously, it seems like the cannabis plant is built for the intelligent, inquisitive, imaginative, ect. mind. Not only do my senses, reason, intuition, and imagination expand on marijuana, I also understand science so much more. There is something it does to your logical faculty that makes you...

I thought of putting this in the social science or philosophy forums, but I don't want to get too abstract about it. This is just something I've found a little confusing during life. :redface: When great events and accomplishments happen, we celebrate them. We throw parties and serve lots of...

It's my belief that if some one was at the equator or the south pole there weight might be differernt Sum of F = m a = mg- N a = v^2/r at the pole the distance from person to rotational axis is 0 so a= 0 and then mg = N On the equator the velocity can be calculated from 24 hours to go...

Speed of Light c= \frac {1} {\sqrt{\varepsilon_0\mu_0}} Phase Velocity v= \frac {1} {\sqrt{\varepsilon\mu}} Electric Permittivity of Free Space \varepsilon_0 = 10^{7}/4\pi c^2 \quad \mathrm{(in~ A^2\, s^4\, kg^{-1}\, m^{-3}, \, or \, F \, m^{-1})} Magnetic Permeability of Free Space...

Does anyone have any information on diode failure? I'm interested in knowing how diodes can fail and what happens when they do fail. Specifically, what conditions of a diode will cause it to fail to be a closed circuit either direction criteria (like, become as useful as a wire)?

I was surfing some old exam questions and I found a nasty one... They asked to prove the existence of fringe effects of the electric field at the edges of a plate capacitor, using Maxwell's laws. In class we always assumed the ideal capacitor without fringe effects so I'm having some kind of...

Can anyone describe what the effects of the Euler force are? If you're not familar with it, it is a fictitious force that arises from a rotating object undergoing a change in rotation speed. Can someone tell me what the effects of this fictitious force are?

We will imagine a core ring of magnetic material (hi mu) encompassing the earth. At one station, we wrap a couple of loops of wire to form the primary winding of a transformer - say in Los Angeles. At another part of the earth, say Paris, we wrap a few turns to form a secondary winding - our...

I am a science fiction writer and I need some help with developing a plausible alien species. The species has to end up technologically advanced. What would be the effect on a species that evolved on a world with 74% nitrogen and 25% oxygen (other gases remaining similar to Earth)? Thanks for...

In another thread, someone was talking about cosmological expansion effects on planetary orbits. (Actually it was about lunar orbits, but I think planetary orbits are more to the point). Through a somewhat round-about path, I eventually got to thinking about the following question. Suppose we...

If I were to take a permanent magnet and hold a piece of, say iron, a fixed distance away there would be constant attractive force generated between the two bodies. If I were then to cool the magnet down towards absolute zero, but keep the temperature of the iron constant, what changes would I...

Hello, I've learned from my study of oscillator circuits that an inductor has some inherent capacitance in it due to the distance between the individual windings. I've heard somewhere that if you place a permanent magnet close to a coil that it will behave like a capacitor and I was wondering...

I'm curious as to when people think the soul leaves the body. I think most people's first reaction would be, "at death." This was my belief as well (if there is a soul). However, how can one define death? The idea was never a problem until I factored in new scientific technology called cryonic...

1)does a magnetic compass needle have high remanence or low remanence? 2)in a shell type transformer core required to carry DC in addition to normal AC, what effect does the introduction of an airgap have on AC performance of such transformers.

Spin-orbit effects splits !? Hi AllL the spin-orbit effect splits the 3P-->3S transition in sodium(which gives rise to the yellow light of sodium vapor highway lamps) into two lines 589.0 nm corresponding to 3P sub 3/2-->3S sub 1/2 and 589.6nm corresponding to 3P sub 1/2 --> 3S sub 1/2. How...

Can nonvisable light effect photograph's when your taking a picture? I know that if there's enough radition that it can effect film. But if there's a small amount of nonvible light like ultraviolet or infrared could it be possible for it have an effect on flim.Woul it also be possible for it...

Hi. Can anyone explain to me what spin-up effects are? The context is a waterwheel that consists of an ordinary wheel with papercups with holes in the bottom suspended along the rim. It is stated that for this wheel there are two sources of damping: ordinary frictional damping and "inertial"...

As someone returning to a study of physics after many years, I would appreciate any help and comments on my unresolved questions after reading “popular science” type information regarding quantum effects. In considering (that old chestnut!) the “twin slit” experiment to demonstrate the quantum...