Other Sciences

Simple question: Why are large parts of the planet flat, while others are raised and mountainous? Is it related to climate and wind/rain errosion over enormous emounts of time, or was the planet just formed this way?

An interesting report from NOAA concerning a severe geomagnetic caused by a solar flare on Friday. http://www.noaanews.noaa.gov/stories2005/s2437.htm Has anyone experienced any of the possible problems described in the article ?

Hi. If a container had a 100% perfect reflective interior, sort of a thermo; could light be stored in it ? Miguel

OK, I have a NIB magnet attached to a piece of steel using an acrylate based adhesive as shown: I mean, that is what it looks like, you can't see the glue or anything! I want to remove the NIB magnet from the steel backing... but the glue is strong, how can I do it? I do not wish to ruin the magnet, so that rules out extreme heat, hammers, explosives etc!

i am tying to design an experiment to measure the magnetic flux density between two perminant bar magnets, using a hall probe. i have come across many formulae, but all calculate hall voltage using the flux density, is there a way to get the hall voltage and use this to work out the flux density

I mean can u guys give me some example of this, thanx~

What do you think the purpose of cave paintings, artistic figurine carvings, and other forms of art in early hominid societies were? Personally, I think the origins of cave paintings were probably for some kind of plan, like a hunting plan, or for teaching (maybe less likely for teaching because it would have been more educational to actually see the animal, which was easily feasable). But this can't really explain carved figurines of animals, made from ivory, bone, wood, and rock (not sure of rock). Also, carved objects on weapons. Maybe the figurines were toys? The first picture is of replicas of actual artifacts. The second, is images of the actual artifacts an…

When a beam of lightning hits a tall tree, the tree catches fire and broken down because the energy gained causes the water inside becomes steam. What happens when a beam of lightning hits a black carbon solid?

Virtual particles are particles that exist for such a short period of time that they can't be observed. If this is true, then wouldn't this defy one of the criteria of science, namely empiricism?

Leap years are needed so that the calendar is in alignment with the earth's motion around the sun. why not just recalibrate with daylight savings?

Hi, I am writing a little software program that displays time on the basis that a earth year is a measure of the earth making 1 revolution around the sun. In contrast to "In the year of our Lord 2004" or in contrast to another culture ideal of time. The question is what year is it? or how manyrevolutions has the earth made around the sun?

I was wondering if anyone here has ever experienced deja vu. I am not talk about life altering visions. I am more interested in simple vision. The reason I am starting this topic is because I have had many vision over the past ten years. They where never any major events just simple things. (Example: this morning I was at my mother house and I had not seen her yet but I could describe what she would say when she first saw me and by no mean was this one of our normal conversation.) I have seen many people say this type of thing happens to them a week or month before hand but mine tend to happen six or more month before the event. I also was wonder if anybod…

hey could i please some help with the following questions? thanks

I saw on the science channel yesterday the story of deep space one. Interestingly enough these top phd scientist stated they watched startrek and this led then to science. Everything I learned I learned from startrek. All the disciplines and subdisciplines. The ion drive was invented in WW11 by the Germans. Yet as I understand they the scientist have beamed two atoms from one place to another. I think its interesting on how a science fiction show has promoted the new applications like the ion drive and computer enhancements to todays science. I now understand how these science fiction movies promote science for the future. Any good science fiction movies out there to…

What are the textbooks that you use for IB Physics? IBH Physics? Or if you're not doing IB/H Physics you can still recommend textbooks for AP Physics B or AP Physics C. Or even better, you can recommend general introductory physics textbooks (but I'd prefer first and second year university physics textbooks). The purpose is that I'm doing extensive research on general physics in preparation for the IB Physics. Thanks for any recommendation.

it's that certain nutrients, vitamins, minerals, whatever, go to a certain part of the body where they're used. Like drugs go to the brain, beta-carotene goes to the eyes and a million other things go to there propper places. And so the other day i was thinking, these nutrients, they dont have motors to propel them in a certain direction, or brains to know where to go, so why do they say, this chemical goes there? Then i was wondering how it works, and i figured its probably pretty simple, it all goes into the blood, so it's probably just that certain tissues have receptors which absorb certain nutrients. sorta like they fish out what they can use, and the rest is just pa…

I was asked at the end of a physics class to take this survey. Immediately it seemed like an odd survey, something not quite right. So I decided not to participate in it given my worries as to how my responses would be interpreted. I took a copy of it home and scanned it and asked a few people what they thought. The opinions of the survey were far more polarized than I anticipated, many seeing absolutely nothing wrong with it, even supporting it as a well done survey, and few feeling the same way I did. Without implying too much of my stance here, I thought it appropriate to stop trying to convey what I saw in it and just gather opinions on the problems the survey may …

I am in high school and just getting decent at writing lab reports, my teacher makes it sound as though they are a universal format etc. So i betting within the scientific comunity there is a reasource with a data base of lab reports. if there is does anyone have a link or a direction they could point me in?

hello everyone, sorry if the answer to my question is easy to find if i just look but the further down the screen i go the "stupider" ( not even a word) i feel. but here goes.... does anyone know of any gas or gases that have a reaction of expanding when introduced to a low (?) level of electrical current. gasoline has a high reaction to a very intense ( sparkplug firing) and is subsequently burnt up. i'm thinking about a gas that would expand but not burn or explode . but rapidly expand. and upon removal of the electrical charge ( or current) would cease to expand and revert completely or mostly back to its original state. if anyone knows anything like this i would…

I have a theroy people with high IQ thend to deja vu more, so if you do deja vu alot whats your IQ and how often do you deja vu?

Does the inverse square law apply to a laser beam? I couldn't tell when I did it. It didn't look like it did. As I got farther from 1 meter, the diameter of the beam got bigger. After about 5 meters away, the beam didn't expand anymore. But I didn't measure the diameter accurately enough to tell what happened.

I would like to know how particle detectors work, if anyone could tell me, because I think there is a way to manipulate the uncertanity principle to produce energy, and I need a way to observe the particles so it changes their actions.

Updated at post 42. I don't know what science this belongs in so forgive me if its misplaced : P I'm trying to generate a spark with a 9v battery and some basic electronics. I know that in normal air it takes 50K volts per inch of spark, but I dont want to do it in normal air. I want to do it in a mixture of 2 hydrogens 1 oxygen (gas form. yes, i know thats water) plus a minor amount of regular air. I am curious if it takes more or less voltage to spark in that kind of atmosphere and if someone a lot smarter than me can tell me about how much different it is.

Right, this is a first in a number of threads were, i will try to disprove "dubious" theorems. Now, to disprove this, I intend to draw a country arrangement, where 2 colours are the same, and not where it is just like 6 lines dividing up in a cross formation, where each tip touches. So far i have come up with the following, that appears to "not" work.

Hi I am working on CO2 quantification using remote sensing. Someone interested to discuss some problems of PcLnWin (Fascod3P) - like how to estimate the radiance at sensor in certain atmospheric condition ? Thanks Prasun