Human Definition and 880 Threads

What is the probability of humans surviving beyond the Earth given: - the historical rate of technological advances - the rate of human expansion Vs available Earth resources - the ability to locate and survive on another planet(s) that can support human life - taking into account the...

The amazing 'Howard the Human Projectile' is fired straight forward from a 300 kg circus cannon during a recent Ringling Bros. Barnum and Baily performance in La Plata. Howard has a mass of 75 kg and the cannon recoils with a velocity of 2.5 m/s, at what initial velocity does Howard leave the...

Given that we humans are descended from the great ape, as well as are gorillas and chimpanzees and bonobos, why do we have hair that grows indefinitely, while they do not? I've read something about a sexual selection aspect to evolution, surmising that hair is a means to finding a mate, like...

hi there, i came across this video https://www.youtube.com/watch?v=kIbYiO5BRYk http://www.youtube.com/watch?v=kIbYiO5BRYk, and before I buy the set I'd like to know how the human body metabolized gallium metal/ions. I've read quite extensively on gallium metal, but I can't find much info on how...

Is possible for human muscles to contract from resonance at certain levels/ranges of frequency? I have been a lot about how with the right frequency, one can induce contractions in diff parts of the human body. Does anyone know about this? If this is true, then what is the way you can...

Primo Levi: "Human Surface" Homework Statement http://answers.yahoo.com/question/index?qid=20101205082200AAZCums What calculation did Primo Levi use to get the following conclusion: According to Primo Levi's book, if the human mass of 250 million metric ton would be spread over the...

about human power?? consider the worker needs to bring up 40kg, the floor is about 36m so the work done is w = (40kg) (10m/s^2) (36m) w = 14 400J i don't know what's the (10m/s^2) for??

I've been reading about parasitic host manipulation and was amused by the section on T. gondii (cat poop parasite) and it's effects on human behavior, especially on women. Look what the cat dragged in: do parasites contribute to human cultural diversity? Kevin D. Lafferty∗ page 280...

We know that color is a sensation in the brain from interpreting different wavelengths of light. Therefore, color does not actually exist in the real external universe. Why not take it a step further and say that the sensation of brightness is a human concept. Not that actual magnitude of...

Greetings, A curiosity – I recall from school being shown the derivation (from quantum mechanics and statistical physics) the derivation for the PN silicon junction – Along the same lines of thinking – Can it be derived to show the human body’s temperature is 98.7 (or whatever the...

A computer prints two papers, on the first paper is written, "ASDDSF DFGDF ERSDKUF DFD RRVFDSDA" on the second paper is written, "HOW ARE YOU HSHJFD SDF JGYJHNF LKJSFL" One might say the first paper has some random letters which are generated by a computer randomly. But he might say the...

Hello readers, I have been thinking and if you bear with me hopefully I don’t sound too mad!. I have read an interesting article and in it a leading scientist has claimed that A detailed, functional artificial human brain can be built within the next 10 years. Henry Markram, director of the...

is there a limit to the amount of force a human can generate? for example in superhero physics it is shown the original superman can leap 660 feet. The author has shown the amount of force required to accomplish this f=ma, a=v/t, v^2=2gh Velocity>v^2=2*32*660> 205/sec or 140miles...

I=V/R, so the amperage is determined by the voltage and the resistance of the human body, right? But yet it is possible to have a high voltage but low amperage current go through you, say you grabbing 2 electrodes which have the a high voltage between them. How come the amperage is low and...

What is "action" in human terms? A friend, humanist by profession, asked what is "power"? Well, that was easy to explain in human terms. You do a certain amount of work, you use a certain amount of calories, you can do you work slowly, during one day, or you want to do it in one hour. Then you...

Homework Statement You are being hired by circus owner to design a cannon which will launch a human into the air toward a net 50 meters away (at the same height). THe design should conform to the following specifications (ignoring air resistance): 1. The circus tent has a maximum height of...

[b]1. The human brain consumes about 22 W of power under normal conditions, though more power may be required during exams. How long can one Snickers bar (280 cal per bar) power the normally functioning brain? [Note: The nutritional calorie, 1 cal, is equivalent to 1000 calories (1000 cal) as...

Hi, I am not biology student and I want to know this In our body, which organ can live for long time and how long it can live? also which is the organ with shortest life? Nowadays people talk about donating eyes, kidneys after their death. So I got this doubt, that whether these organs are...

Hi, I have taken an introductory undergraduate QM course, solving for different boundary conditions like particle in a box, but the physical interpretations of some of the tenets was not well explained. I was surprised to find this paragraph on Wikipedia: "Published by Werner Heisenberg in...

Hypothetically: If a hollow sphere with a human inside were placed exactly at the centre of the Earth's core; then how would gravity affect the human (or any mass for that matter).

My friend who thinks we were "created" keeps telling me that there's no link of a human evolving from a previous species.. Now I keep telling that there's tons of evidence in museums & whatnot, but is there any good links online that can clearly show him?

Hello guys, I've been thinking about a concept, and to some of you, it may seem like slightly different version of reincarnation, but take it as you may because I'm an atheist and I don't believe in afterlife, and this may sound contradictory to what I'm about to say.. Bare in mind that the...

I would like to know the use of lactose and galatose in human with regarding to their solubility. how does low solubility of lactose can be made good use on human? what are the uses of galactose for human other than making guma?

I've found very little about the actual definition of human instincts! Besides reproduction, perhaps violence, & one or another item, seems there should be a list! We are known to be a social animal, which, to me, means that gatherings & mob mentality (not only in the negative sense), are our...

Homework Statement determine the stopping distance for a car with an intitial speed of 26.9 m/s and a human reaction time of 0.9s for an acceleration of -4m/s^2 Homework Equations x=vt t=v/a x=x+vt+.5at^2 The Attempt at a Solution I used the second equation to find total...

Homework Statement The human heart is a powerful and extremely reliable pump. Each day, it takes in and discharges about 7,500 liters or blood. If the work done by the heart is that of an average American female, 1.63m; and if the density of blood is 1.03 x 103 kg/cubic meter, a) How much...

Homework Statement If a person breathes 10 liters per minute or air at 68 deg(F) and 50% relative humidity, how much water per day must the internal membranes supply to saturate the air at 98.6 Deg(F) (Assume all moisture is exhaled) If each gram of water extracts 580 calories as it is...

How many of you have ever been excluded from a position because the company made all applicants take the myers-briggs or a compentency skills assesment? Just wondering, because in my software life I got a lot of consulting work because companies could not hire the talent to do development...

Homework Statement I was asked by my lab teacher to investigate the effects on the human body of being exposed to very high and very low pressures, and while I have found some good sources of info it is not that easy to find good and quotable sources, I was wondering if anyone could offer some...

I am working on a design for a human operated technological exploration suit. I have the energy supply worked out and designed to scale and tested in small scale prototype. I would like to put together a team from here to help develop this unique system for deep sea exploration. I would also...

This is what you get if you compile numerous attractive females and then take all their features to come up with archetypal faces that is supposed to best represent the group they belong to.

Do you think that eventually all human races will be homogenised? With all the globalisation and people of different races having children together, do you think that eventually there will be no more 'race' - like there will only be one type of human- we would all look indistinguishable from...

If there was an isolated human population that eventually became unable to breed with any humans outside of their population, would they become classified as a different species than us?

While listening on my english lecture, my teacher told us that authors usually have similar word choices and sentences structures on their writings. Because of that, I began to wonder if it is possible (if it hasn't been done already) to quantify the human language (if that's the right term...

Well, at least this one is: http://www.myfoxphoenix.com/dpps/news/offbeat/pea-of-life-grows-in-ny-man's-lung-dpgonc-km-20100810_9112207

Homework Statement Can some one please help me out on this, i can't seem to get my head around it. Regards, Rob

i live in a hilly location where i have very difficult radio reception, so i am always futzing around with my little "active" antenna for FM radio (PBS). i notice that reception always improves as i move near the antenna (like within 3-5 feet is noticeable), and gets much better if i just touch...

Another possibly unusual question from me, may also enter in the realms of philosophy or math, but I do not think that physics is a wrong place for it. It is possible to find information about size of the universe and number of atoms in it and such. We as humans can imagine numbers of...

Would the human eye be able to pick up a picture from the Hubble Telescope unaided if it were close enough? For instance, how close would I have to be to the Pillars of Creation in order for it to fill my entire field of view if I were floating in outer space? I assume several hundred light...

Homework Statement The auditory canal of the human ear extends about 2.5 cm from the outside ear to the eardrum (a)Explain why the human ear is especially sensitive to sounds at frequencies around 3500Hz. Homework Equations Speed of sound v=344m/s The Attempt at a Solution I know...

When I was 2 years old I contracted pneumococcal menengitis and it destroyed many of the hair cells in my cochlea - resulting in profound deafness. I wear a cochlear implant at the moment but I was wondering: When will it be possible grow human hairs cells with stem cells, or when will it be...

Hello, I'm new on this forum and I hope I will blend in nicely. I happen to have a couple of questions on the Alpha Centauri star in the constellation of Centaurus. I know the distance between this star and our milk way is huge, but suppose one could travel at the speed of light X 25, would...

...assuming very slow adaptation is possible. How low can one go? And something else: if you're at very low pressure, water or blood would boil at RT (pressure is lower than the vapor pressure of water). Would this mean a relatively innocent cut wound would make you lose a lot of blood? The...

Hi all, Sorry if this is an incorrect part of the forum. Living a relatively sedentary lifestyle, consuming a Western diet, living in an area where drivers see pedestrians/cyclists as moving targets to run over and after packing on a few pounds, it got me thinking. I'd like to (as a...

I wana become good at math and physics, and become a mechanical engineer. I will like to make contributions to society. But can you be good at this withouth loosing a balanced social life, having a girlfirend and friends and make some exercise xD.

I'm finding it hard to describe what I mean, but here it goes. According to the evolution theory monkeys, apes among others, and humans have a common ancestor - their hereditary line of ascent leads to a common forefather(s). As evolution predicts, let's say, male nipples is a proof that human...

In the movie Terminator, Arnold Schwarzenegger lifts someone up by the neck and, with both arms fully extended and horizontal, holds the person off the ground. If the person being held weighs 650 N, is 60 cm from the shoulder joint, and Arnold has an anatomy analogous to that in the figure...

it comes together as it goes on ask any questions you'd like So the last couple weeks iv been kinda in a little engineering stage thinking about different ways to produce power and what not in this transition from school to life iv came up with a lot of good ideas and I mean it lol I...

Homework Statement A human bone has a youngs modulus of 10^10 N m^-2. It fractures when the compressive strain exceeds 1%. What is the maximum load that can be sustained by a bone of cross sectional area 3cm^2? Homework Equations? F= Y*(change in length/ original length)* cross...

I need to know if this stuff http://www.coleparmer.com/catalog/product_view.asp?sku=8809762&pfx is safe for human consumption. Camphoric acid is supposed to stop sweating in wasting conditions. I had a sympathectomy and can't go outside in the summer without looking like I climbed out of...