Nature Definition and 712 Threads

ok I'm not so sure if this topic is exactly where its supposed to be...in the biology section! :redface: oh well but the topic of the pics I'm looking for is called: "the relationship of living things and their environment" ...lol does anyone know where i can find high quality/ high...

A farm tractor tows a 4400-kg trailer up a 21 degree incline at a steady speed of 3.0 m/s. What force does the tractor exert on the trailer? (Ignore friction.) How would you get the answer 15000 N.

The Real-Line also has a fractal nature ------------------------------------------------------------------------------------------------- The standard definition: "Real line" is used to mean real axis, i.e., a line with a fixed scale so that every real number corresponds to a unique point...

If I take a large mass such as the sun and change its negative electric charges (half the total number of charges) into positive charges, so all electric charges are positive, and I transform the electric force so that like charges attract, the charges would be behaving like masses.If I take the...

Like quarks, space charges are also fractionally charged particles. But unlike quarks, the absolute magnitude of space charges is always 1/6 while that of quarks are 2/3 and 1/3. There are also two polarities (+/-) of space charges. The grouping of space charges forms the elementary particles...

So we had this debate in my Social Studies class today about nature vs. Nurture. The philosopher Jean Jaques Rosseua said the nature of humans is good, the philosopher Thomas Hobbes said that it is evil. Does it have to be one or the other? It depends on who you are and who you choose to be? It...

If one adds a scalar to the Hilbert action without considering any matter fields, S = \int {d^nx {\sqrt -g} (R - 2 \Lambda) one gets the Einstein equations as: R_{\mu \nu} - \frac{1}{2} R g_{\mu \nu} + \Lambda g_{\mu \nu} = 0 Now, one can take T_{\mu \nu} = -...

Magnetism is still a big mystery. This is due to the fact that the source of it cannot be found, the magnetic monopoles. It can be theorized that magnetism is the key to understanding the concept of perpetual motion. It seems that the magnetic field is always in motion. This motion is...

We all know there are a lot of unexplained phenomenon out there - do you know some? I don't mean historical mysteries, UFO's, ESP, Miraculous Healing, etc ... I do mean things that can seen again and again e.g. I was told by a teacher that photosynthesis not fully explained yet, the flip of the...

Hello. Is it possible that light speed is the maximum speed because of a property of space time and not that of light? I.e. light can go the maximum speed in the universe as we know it but the maximum speed is not determined by light itself but by the nature of the fabric of space time: light...

Is Maths an underlying principle of nature or did it originate from our brain? I think we would agree that Maths is abstract, but would it be there if we wouldn't be here? Maybe Maths is an underlying principle of nature that our brain is capable of taking notice of in an abstract way. ...

Can you do anything not selfish? Are there no real choices? My friend came up with this predicament. Everything we do is a selfish act. Every decision we make is one we want to make for ourselves. For example, I want to help out an old lady cross the street because I either want to do it to...

HUGE Bacteria! I don't know if it has been brought up before, but while I was just making random searches on the net (when I should have been doing homework) I found this I was amazed. I kinda want some in a fish tank or something, kind of like having sea sea monkeys in you fish tank.

Man, Nature and "Convenience" Ignore the typos in this rant as it was written in a mad dash of typing, and I haven't gotten around to proof-reading it yet. what makes man truly human There is no distinction in classification of human vs animal. The only thing that makes human human is...

the world is over populated. soon, inevidably there will be war for food. we strive to protect every human life when infact this will bring on more suffering in the long run. more life, more to feed, and the nature of human reproduction demands their be more birth then death so long as we live...

What are rights and why are they deserved? By what criteria do we decide that one deserves rights?

Hey Everyone, Please help settle a bet between a co-worker and myself. Neither of us are trained physics (I have a philosophy degree and he has a computer science degree), but we are both "amateurs" interested in physics. OK, here's the issue: My friend argues that time, explained as the...

Shahil said, This brings me to something i had been meaning to say, I think robert tracinski pointed it out best when he said, "So it would seem that the system that enforces virtue leads to poverty—while the system that encourages vice leads to prosperity." Meaning that although...

At the quantum scale physics becomes hugely unpredictable and particles appear to defy the laws of physics at every turn, only obeying classical physics on 'average'. Beta rays appear to have wave like properties, they consist of electrons, which are known to have a mass and have particle...

What is the nature of "GOD"? these threads get lost debating whether or not there is a god. to me that is a circle jerk because we all debate based on our individual beliefs, let's assume there is a 'higher power'. what is s/he/it's nature??

I like to study and read about physics in my spare time. One thing that has always puzled me is how the scientists, particulary physicists and mathematicians can come up with a mathmatical equation for an event in nature.One thing I've tried to study to get a better understanding is the Lorenzt...

This paper is dated to the 23rd of December, and seems to be a nice idea... http://arxiv.org/abs/hep-th/0312278 Sort of deals with the ultimate question: where did the physical laws come from? No religious discussions here guys, let's rely on a firm fact basis :) One question...

This paper is dated to the 23rd of December, and seems to be a nice idea... http://arxiv.org/abs/hep-th/0312278 Sort of deals with the ultimate question: where did the physical laws come from? No religious discussions here guys, let's rely on a firm fact basis :) One question...

Face on Mars! True nature revealled! Is it less exciting that it's a mesa? Doesn't the pursuit of science generate its own excitement, wonder, and awe? http://antwrp.gsfc.nasa.gov/apod/ap031214.html

Iam having some trouble understanding the nature of free vortexs, with the internet and library being extremely scarce in answers. My understanding is that the angular momentum of the water causes a centripetal force to push the water outwards leaving a cavity in the middle. I understand that at...

My cat is more dangerous that my four dogs combined! Gee, she is normally very nice (except sometimes when she gets mad when you don't allow her to chew your fingers), but sometimes she can get really vicious. I guess it might just be the nature of the breed, a North-American ranch cat, just...

Has anyone read this? Either the physicists interviewed in this article were ridiculously stupid or they're so smart that they go right over my head. People at NASA sent out some sort of probe which was just intended to go out into the uiniverse with no particular destination. It constantly...

This question isn't as obvious as it first seems. Think about it a bit: Why do we have 2 sexes?

A simple question,but to which I can't find a ready answer. What is the nature of this rotational force that affects all celestial bodies? What was the initial impetus? How does physics explain it? Thank you, ion

[SOLVED] the nature of electric magnetic radiation,it's rest mass and potential to sl Some people look at light as photons I look at light simular to radio waves except at a higher frequency,so if you analyse light from the point of from radio waves you get a much better picture as to...

A new claim has appeared in physics. It is claimed that there is a largest possible force, namely c^4/4G or 3 x 10^43 Newton. (The claim is made in the paper http://xxx.lanl.gov/abs/physics/0309118 ) All my friends and acquantances have first said "wrong!" but then failed to produce a...

In the previous theme I spoke, that tangential energy of the dipole of speed is proportional to its square. Accordingly, tangential energy of radial resonance oscillations of the energy ring is proportional to the total square of all dipoles of speed in the ring. See file "dipole of speed.pdf"...

Alrighty, I have a problems with trying to convert graphs into.. well other graphs. Right now I'm sort of stuck on Velocity, Accerleration and Force. For instance covering this statement into a Graph. the object moves away from the origin with a constant velocity. Then I got to graph it as the...

http://www.nature.com/nsu/030929/030929-3.html

ultimately i don't know if i can know the properties of God. but i can state some opinions. i fully agree that God has nothing to do with reward or punishment. i don't know for sure if there is a heaven or a hell. i won't know for sure until i go there/die. i've also heard the definition...

malai5 suggested to write down "what do i need to know at this time?" and see what floats in. i saw no harm in this so i did. and i began auto-writing. I'm not making a definite claim about the source of this writing except that it is probably something very personal to me. perhaps it is my...

could someone just explain to me the ideas about human nature? is it a real science thing or just a philosophy? and what characteristics are considered human nature?

I must ask that you the reader suspend your belief or disbelief for the moment, only for the time it takes to read this post. I am trying to get across a point, a different way of looking at God and nature. Once you have read this with an open thoughtful mind and given it a bit of thought you...

You might like to check out this site. It has some interesting ideas. http://www.geocities.com/natureoflight

Hi! In terms of magnesium fluoride what is the minimum thickness of mag fl coating that must be applied to a glass lens to make it non-reflecting for that wavelength? (the index of refraction of magnesium fluoride is intermediate to that of air and glass) 1/2 wavelength out of phase to...

[SOLVED] On The Nature Of Light The decision to define a photon as a sub-atomic particle is a difficult one to understand. According to the existing theory there is a different photon for every frequency in the whole of the electro-magnetic spectrum and for every possible combination of...

A colleague has posted an essay on antimatter at [PLAIN]www.rfprobes.com.au/gimliphysics/symm.htm[/URL] . It is suggested that the missing antimatter of the universe is not missing at all. In other words there is no baryonic asymmetry and CP violation has been misinterpreted. I think the ideas...

What causes the high up cirrus clouds to be ripple shaped and thin, while the lower stratus or cumulo nimbus clouds to be puffy and opaque? Presumably, it must have something to do with atmospheric density and temperature...although how exactly seems uncertain. Also, what causes clouds to...

http://www.nature.com/nsu/030609/030609-16.html

http://www.nature.com/nsu/030609/030609-7.html

What is "spirit" anyway? The animating force within (all?) living things? The central nature of a person? What are its properties? Its proclivities? Its "powers"? Its "purpose"? Is "spirit" real or imagined? Essential or extraneous? "Perfect" or "evolving"? Eternal or finite...

This was discussed quite a bit, on the old PFs, and I'd like to revive the topic. Is it "evil" to sin against a person? If so, then all "heroes" are really "evil", as they must sin against their enemies, in order to achieve their [noble] purpose. However, this raises the question of...

If sunlight of color B is scattered through an angle 16 times greater than sunlight of color A, then the wavelength of color B is? Dx :wink:

Hello, A monochromatic light is incident on a Youngs double spilt setup that has a slit separation of 30um. the resultant bridge fringe separation if 2.15cm on a 1.2 m from the double slit. what is the separation between the 3rd order bright fringe and the 0th order bright fringe? I know...

Hello, In a double slit experiment the slit separation is 2.0mm and two wavelengths 750nm and 900nm illuminate the slits. A screen placed 2m from the slits. at what distance from the central maximum on the screen will a bright fringe from one pattern first conincide with a bright fringe from...