Other Sciences

I cannot remember who said it, however once I do infact remember I will kick myself, that at the speed of light time slows to a near stop, atleast for you. Taking this into mind, if in a black hole, where things must move faster than light (thus the reason light cannot excape etc.) Then if time Stops at the speed of light, does it go backwards when you accelerate past that speed? And if so, wouldn't when you enter the black hole, you be reveresed in time as soon as your velocity hit the breaking point of the light barrier? At that point , would you ever actually fly into the black hole?

This has been bugging me for a while now, but does anyone know why things look smaller when they are further away? I asked this about a year ago but I wasn't satisfied with the answers I was getting. Someone told me it has something to do with lenses. but I dont know whether thats true or not. Does anyone have a decent scientific reason as to why this occurs?

Does anyone know how to clean the LCD screens from dust??

Why are children's voices typically higher pitched than adult's? Does it have something to do with their windpipe? Complete explanations would be very helpful. Much thanks.

A very confusing topic to define in a category. How do photochromatic lenses work? You know those glasses that are transpaerent and when exposed to sunlight, they darken? How do they work, from the name, I can guess that it has something to do with light, other thatn that, i have absolutely no idea! How do they work? What chemical do they have in them that makes them behave like this?

I just wanted to get some opinions, is the world overcrowding with people? My opinion is no (not yet at least), if you get all the people you can nicely fit them all shoulder to shoulder in Jacksonville Florida. Another factor is food.

I have a question about the strong force of an atom's nucleus. I am an 8th grade student who is in love with science. A question was thrown my way asking what I think would happen if the strong force of an atom was very very strong. I said that protons of many atoms would attract and the opposite of the big bang theory would happen and all of the matter in the universe would form one huge atom with one huge nucleus. I then stated that usually atoms with that big of a nucleus, even with a strong force, were radioactive and would break apart. My teacher was quick to correct me and say that was not true. I am pretty naive on this subject, but I wanted to know what oth…

Hi, I'm doing a research project about global warming. I wanted to know what opinions some of you have about it. Do you think it's a real problem, is it overblown, does something need to be done about it, and if something does need to be done, what might that be? Thanks so much in advance.

has anyone ever that expression before or "Stop making that sound, it`s putting my teeth on edge". things like the Skrrreeeeeeeeeeeeeeeech when finger nails go down a blackboard, or rubbing polystyrene together. it seems to make some people go crazy, almost as if the sound hurts them? they will cringe, or shout at you, and at the very least not want you to do it again! what causes this?

There are several threads about what books you have been reading. But they deal with general or scifi. I would like to keep this thread to only science books(meaning no scifi). Anyhow So what is everyone reading...or would recommend in any field of science. Me...Just recently finished 1) a child development book called "Whats going on in there?" good easy to read and interesting for cognitive modeling 2) steve grands book "creation" also good for cognitive modeling 3) Gary Flake "Computationaly Beauty of Nature" Excellent book I wish i had this when I was going through university or even have it taught in university because my program structure sucked ass…

For those of you who enjoyed "The Elegant Universe", Brian Greene has a new book out. From the short moments I spent with it tonight, it seems to be more philosophical. Anyhow, as I was scanning through the first few chapters, I noticed an interesting question posed by newton that I have never considered. I'm going to relay it to you on memory, so someone correct me if I make little errors here and there. Imagine you have a bucket which is nearly full of water suspended from the ceiling by a rope that has been twisted so as soon as you let go (of the rope) the bucket will begin spinning. Neither the water or the bucket are in motion until you let go of the rop…

In regards to the big bang: Instead of an explosion which originates from a superdense point of space, could it be possible that two (or more) dense matters collided at super speed, thereby causing the explosion, and explaining the excess energy in space? Would this concept negate the need for a "dark energy"? Also could it be possible that the increased accelleration of the universe could be explained as a collective of matter which has not yet reached its peak velocity after an explosion, and not a factor of "dark energy"?

A big hello to all here. I am new and this is my first post. Has anyone read about or studied semiosis? How old is this science of signs? Are there popular opinions from the scientific and research community about its validity, relevance and/or importance as a science? Has it developed and matured as a science that continued research can be based on? Any information on where current research stands? I realise these are huge open-ended questions but I'm hoping someone would have studied this to the extent of being able to offer at least an opinion if not factual information. I am totally at a loss and would appreciate any and every kind of help. Thanks…

"The Wall Crawler has a fan built underneath the vehicle to create a "vortex attraction, " which creates a low-pressure vacuum that works in both air and water to hold the robot to the wall. Researchers are optimistic about the Wall Crawler's underwater capabilities. So much so, the Defense Advanced Research Project Agency has stopped funding a strictly underwater robot. " from http://www.dcmilitary.com/army/pentagram/8_39/features/25612-1.html hi everyone, i just want to ask if anyone knows what's vortex attraction and how it works? i intend to do it for my physics project... thx alot.

Does anybody know any websites/ companies etc. That I can order science based (but not limited to) resources (on paper e.g. posters, leaflets, booklets). I have managed to do this from BNFL and Magnox (better way of reading about physics in a book you have to buy!!) Thanks

You know that feeling when you are right between awake and sleep? When your dreams are most vivid and vibrant? Sometimes it's called the trance state or hyper-concentration. Anyway, sometimes I find that I can almost force myself into that state from sleep or wakefulness but it's very hard. I was just wondering if any of you are able to do this effectively and how you do it.. barring illegal drugs... legal ones are fine I just find this state to be extremely useful for coming up with melodies or beats for my tunes. (BTW, I'll be releasing a song onto my site in a couple hours that I did after a night of drinking between the hours of 4 …

Ok, a few days ago my teacher was telling me that the faster an object travels, the more mass it has. The mass keeps on increasing until right below infinte at where it reaches the speed of light (i think. Cause this is all from memory ) My questions are HOW and WHY? Thanx guys

As the internet gets more and more advanced, streamlining many aspects of our daily lives, it seems that our virtual personas are becoming simmilarly important. For example, what we think of eachother in SFN is almost as important as what how others view us outside; mind you I could say what I wish about, say, faf, and he'd have a hard time beating me up through the monitor.. unless he fasioned some sort of virus that wiped out my HD, which would be tragic... but therein lies my point. As technology advances to the point of total immersion, so that entire vitual office buildings exist within the walls of a computer generated city, and the best sex you ever ha…

I'm not a big fan of geology, but I'm looking at a map that shows tectonic plates and which direction they move. I was wondering whether or not the direction of the plates will change or has changed in the past. Secondly, I was wondering if a plate could be swallowed. I think I'm referring to an ocean trench. How does that work? Does one plate go over another plate? What if that plate is entirely engulfed?

I want to undestand why earthquake can't be predicted even very short time before it happens?

I've been looking around the internet an so far ive found out that light is made of massless particles called photons. If light is massless how is it affected by gravity? ( black holes and gravitational lensing) If it does have mass, what happens to it when it goes out and can u trap the particles in a box an keep the light from going out? ive just been trying to think about it too much an it bugs me lol SwaggMan

So, I had a thought. What if there is a population contingent whose natural preference to a typeface would be from right to left and not left to right? Like the torah, there are examples of literature that read the opposite way to the norm. I propose an experiment, out here in the intermawebby, where a website is set up with the axis flipped to produce a left to right with some reading material and a vote/comments area. Just for fun, see? Is this just me being overtired and stoopid, or a remarkably cunning experiment that will break the conformities of literature, as we know it? You decide.

OK, We have been studying sediments and soil. More specifically, the percolation and absorption of soil. We looked at how different soils percolated and absorbed water. Now, we are studying groundwater, water tables, and aquifers. So I understand what all that is and that an aquifer is either confined or unconfined. A confined aquifer is an aquifer that is surrounded by impermeable layers, or layers that the water cannot percolate through. An unconfined aquifer is an aquifer that has an impermeable layer at the bottom; and the sides? Anyway, it has no layer or a permeable layer of soil above it. Therefore, my question: If it rains on an impermeable l…

The other day I was wondering, normally, matter in a solid form is more dense than that same matter in liquid or gas form. So why is it that water's solid form, ice, is less dense than water itself? Steam or water in the form of a gas is certainly not more dense than water. Or is it?

Does anyone actualy KNOW how our seas and oceans became salty? and why mostly Sodium Chloride? (I`ve heard several ideas, but each seems to have a flaw appart from the asteroid one, that only suffers from a lack of evidence). anyone?