Human Definition and 895 Threads

Does the human eye have a "refresh rate"? This question probably seems ridiculous, but I have no background in physiology and I cannot find anything discussing it online or in my roommate's physiology textbook. I was wondering if anyone here knows whether the eye and brain processes...

How much air pressure could a human survive in?

Discussion of 2012 prophesies has been closed, as per the general posting guidelines. https://www.physicsforums.com/showthread.php?p=2269439#post2269439 This is about a commercial that I just saw on tv for the "Institute for Human Continuity", which claims to be "preparing us for the world...

Remove all of the fat you would normally ingest - would you be able to live for long?

hi there I'm up to design a device which switches on when human body touches it. I have a rough idea to use IR, Electrical phenomenas of body. But don't know how to start and where to start. help pleasez

What type of surface were human feet originally adapted to navigate (plain/savannah, desert, ect.) and have there been any significant physiological changes to the foot throughout human evolution or between humans inhabiting different environments? Thank you.

Hi. Do you guys have an idea of what kind of careers are open with a BScHuman Biology degree! And, according to you, which may be more beneficial, a fourth year doing an undergraduate Master (research based) or a 4th year spent on industrial experience? Thank You Kushal

I am designing an antenna for a consumer product. The consumer will be very close to the device. I have designed antennas for products like this many times before and have the proper equipment to do so. It's low power, meets all FCC regs for our band etc... I am tired of doing the...

I tested myself with 120fps in Flash, and I could detect a single changed frame (and the next frame is the same as all the other before the change), so that means I can perceive a 120th of a second. Flash doesn't actually go any higher, but I'm wondering at what point I wouldn't be able to see...

What's the electrical current messing up that's causing pain?

I only have a basic knowledge biology, but I've wondered about this before. From a "fully charged" adult male human to dying of lack of nourishment; in case of chemical energy from food, this is often said to be three weeks. If it takes that long for a human to lose energy, how much is...

Hi! This is my first time on here and my first post. I don't do professional work in this field but it has been a keen interest of mine over the years. Anyway, if someone can share some insights, I would really appreciate it greatly! Given the divide between classical physics and quantum...

A friend of mine said that currently, the "wealthy" 1.5 billion people on Earth consume as much as the poor other 4.5 billion. He also said there are not enough resources (corruption, etc, aside) to have the others live the "rich" life style. Which begs the question... how much human life can...

i've always been told that the human pop has been going steadily up and up (6E9 in 1999 i think). a site like this http://www.populationaction.org/ seems to support this. now someone has told me this is all a lie by the elite to kill off large segments of the world. ok that's fine - i have no...

Based on what I have read about the swine flu, it could easily mutate into something extremely deadly, or into something less harmful. The Spanish flu of 1918 killed about 100,000,000 people globally. It had the same name (H1N1) as the recent swine flu (H1N1). I am terrified that within the next...

I was reading on the net about 800m distance running to try and improve myself in the event, and then happened to come across this ~ Yes I know this is common sense and again backed up by medical science's experiments on lactic acid build-up and also since the professionals are far from...

When humans eat steak , the human body converts those animal protiens into human protein. how does the body actually does that ? does it break down the animal protein into its subsequent amino acids or just repair its 3D structure to match that of the human protein structure without breaking...

This probably belongs in the General discussion area but I'd really like to discuss the computer science aspect of this. The AI in this program seems quite amazing. I'm not sure what type of learning this AI has, would it be adaptive or preemptive... This seems like the pinnacle of modern day...

hi my friends I want some informations to study about gamma wave and interactions of it on humans cells.thancks alot.

Homework Statement Hi, I am doing an end of the year calculus presentation on projectile motion in human cannonballs. As an introduction to the projectile motion equations, my group found this problem: The original problem with a figure of it can be found...

Is there Gravity inside the human body?

Hello everyone, I'm trying to put together a computer program that will convert codes into sounds that can be quickly and accurately picked up by the human ear. For instance, it needs to take "0048" and turn that into a sound, that will be different from "0049" or "1148", and a person...

http://news.bbc.co.uk/2/hi/americas/8049633.stm Don't human rights have something better to criticize.

Human Genome Project... Do any of you know anything about the Human Genome Project that wasn't in the standard textbooks? My class has been doing things about genetics research, and the video we watched did not explain very much about it. All it basically said was that the Project was a...

I have had a question in my mind for the last while that frankly I don't have the education to even try to answer. (read why not to join the military before university). Considering our understanding of physics, do we have freedom of choice or are all things that happen following a kind of...

Did Human Exist During Pangea? I was wondering how is it possible that man lived in almost all continents of the globe about 5000 - 10000 years back, when continents had there current positions as seen by ancient sailors like Christopher Columbus, The American continents had its own native...

Would it be possible to tell who the most genetically diverse human is? What significance for adaptation would there be with a person of such genome? Would that person likely have been born in the United States?

I was wondering if the worst case scenario in case of an avian flu pandemic, if it were possible for the virus to cause the total and utter extinction of the human species? What if it mutated into an ultra-pathogenic human strain? There is almost seven billion human beings on planet earth...

Just a food for thought. Firstly - can a fertilized human ovum develop into any stage of embryo inside of a bird egg (chicken egg, or ostrich egg or whichever...). That conceptual difference between how ingeniously and conveniently birds come to life and how unpractical and actually...

hi there. there's an example in the book, but I'm having a little trouble here. Homework Statement Assume that the human eye can pick up as few as 9 photons/s in the visible range. Based on this, estimate the intensity of the dimmest star that can be detected by a night-adapted eye. What...

To star this post off, I would like to say that I am in not an expert in any field of physics but I do have an interest. So, my question is... Can the human body produce an EM field that is strong enough to affect electronic devices? Examples. computers- I'm pretty competent with them...

Fortran issue. HEEEEELP? Not a human error, somethings buggy...? I have no clue why this is acting like this, I'm getting a strange error. I don't believe this is a human error, I've followed the examples perfectly. The picture shows it all. I ran it once trying to use a random function and...

Hi We have talked in school about waves and I heard that our bodies have a wave length. What does it mean? I know it's very little. I do not mean our brain but our entire body. Any good explanation would be appreciated.

Searching for the "Human Connection"--Physics and Music. Hello everyone! I'm currently a senior in high school (going off to study architecture at either Rensselaer Polytech Ins., Marywood U, or Philadelphia U) and am doing an independent research project on the topic of relating acoustic...

Does anyone know the risks etc associated with the human rabies shot? Also, why is there a world wide shortage? I have to be vaccinated against rabies for work at the large animal surgery at my university and I can't seem to get a hold of the vaccine. I keep being told there is a world wide...

Sorry I can't find any information on this.. Never mind the how, but if one were to suddenly find themselves floating naked in the vacuum of space what would be the thing that will kill them first? Would it be: * Plummeting Temperature * Lack of oxygen * Pressure (or lack of it) *...

Why does my body act as a radio Receiver.Last year i accidently grabed the socket to my computer speakers while they were turned on at the power outlet.The computer speakers were not connected to the computer and we do not have a radio receiver at all in our home.I only held the plug for one...

I am in AP Biology and we have been given an assignment relating to human genetics. The statement is: "Humans are genetically different; yet genetically similar at the same time." Explain why this statement is true. I have been researching day and night for the past 2 days and although I have...

With reference to the formula: distance (wavelength) = k / frequency what does a wavelenght of 1176470.58 signify with regards to the fundamental frequency of a typical adult female being between 165 to 255 Hz, where d = 300/.000255 = 1176470.58 Would greatly appreciate advise...

I know we have to expel energy from our bodies in various ways to maintain homeostasis, but what is producing/generating the radiation to begin with? For example, is it the break down of ATP in cells? I've also heard the heart produces an electromagnetic field, and on that note, how is it that...

How well is the human interferon pathways and exact function in the immune system known, and how well is the and regulatory system from gene to protein level known? If anyone has any pointers to reviews of the interferons in the contact of immune system and in particular what regulates it...

Homework Statement I basically need to find out the chromosome number present during each step of human somatic cell division Homework Equations N/A The Attempt at a Solution Here's what I came up with: interphase g1 - 23 interphase s - 46 interphase g2 - 23 prophase - 23...

Hi Folks- Is there a way to determine the air pressure caused by wind at a given mph on a human being? Thanks! MD

Homework Statement Does anyone know the average pushing force a human being can exert? Homework Equations The Attempt at a Solution I did some research online but didn't find anything.

Homework Statement What is the average pushing force a human can exert? Homework Equations The Attempt at a Solution I did some research online but didn't come up with anything.

What genes cause aging, most people think shortening of telomeres is the main reason of aging, but I know there are more than that, like Klotho, Methuselah. But which fews are more important than others, and what else are there?

In the future, if mankind engineered a device that could voluntarily be used to control and manipulate our emotions for the better, should we use them?

What is human nature and what is known by human instincts? What's the difference between the two? Is there any distinct line differentiating the two?

In SPH 4U1, (Ontario Grade 12 Physics) we learn the attempts to stop the affects that the human body experiences when in prolonged periods of time in space; such as muscle decay, loss of bone density, etc. So we learn of the attempts to use centripetal force and angular motion to cause a 9.8...

What biological reasoning explains the panoply of eye color in humans?