Life Definition and 1000 Threads

A plant for example absorbs minerals and moisture from the soil and radiation from the sun. There is a huge variety of ways that these components can be arranged, but the plant organizes them into very specific structures such as proteins, cells, leaves, stem, roots, etc. There are far more...

I am a sophomore in high-school and have been teaching myself calculus. I understand it all, but I have a hard time seeing where integrals apply to physics and real life. I get the basic stuff, like using integrals to find area on a graph, and how you can use them when talking about velocity and...

HS student taking calc 2 at community college. Currently I will have 2 exams left, and by the way things are going I will probably have a B. My mother has this sick obsessions that I must have a 4.0 GPA in order to get a future scholarship and acceptance at university. She made me re-take...

I am meant to deduce the half life from this table (as attached.) I was under the impression that the half life would occur when the initial activity was halved but my answer of 2.34 minutes (from halving the initial activity of 36506) is wrong. Instead, the answer the textbook got was 1 minute...

Hello, I am interested to know how many readers think that we will find life in our solar system, if so when?. I am confident that we will find basic life forms in a human lifetime. also if anyone thinks that there is more that one intelligent civilisation in our galaxy other than our own...

For example, I just heard that ATMs are possible thanks to the development of elliptic curve theory. Also that internal cell phone antennas are an application of fractal theory. Can you share any other specific examples?

For the past year or so I have been really torn between choosing engineering, physics, or a combination of both. To note, I am a freshmen in college but I need to start forming an idea now because the science and engineering field is really vast. I have a huge passion for understanding the...

I must derive the 1/4th life expression for a first order rxn. ln(\frac{[A]_{\circ}}{[A]_{t}})=kt ln(\frac{[A]\circ}{\frac{1}{4}[A]_{\circ}})=kt_\frac{1}{4} ln(4)=kt_{\frac{1}{4}} do I set t=1/4 ? \frac{ln(4)*4}{k} \frac{5.545}{k} What am I doing wrong here? The answer is allegedly...

Is QM really applicable to everyday life in the macrocosm? If it is, how? And does QM say there are no causes, only effects. So, for example, in th e real world (macrocosm), there is a set of possibilities A, B, and C, and causal factors x, y, and z. However, x is an unknown or hidden...

Homework Statement seashell HAVE 90% of 14-C as a livining shell of the same size half life is 5570 years, how old is it in years how many yrs did it take for 14-C to diminish from its initial value to 99% of that? Homework Equations The Attempt at a Solution for the first part...

I want to to know what's the usage of this theory in our life or is there any important application depend on that theory I study it in physics of engineering but i want to to know what's the useful for it?

I give mad props to this man. Read the full story and watch the video: http://goodmenproject.com/2010/10/23/confronting-life/ I applaud this man for taking a stand for his family and others that face similar and difficult situations.

If a hypothetical flying car used turbo fans and/or co-axial rotors that were built into the structure, has a fairly boxy design and looked almost like a normal car (size, shape, curves, angles, design) what sort of performance could it get with today's technology? If it was hybrid electric...

Hello, I have been really interested in nuclear fission in my life, however, have not studied anything solid in the field. I have, however, read a little about it. Basically, I know that in order for fission to take place, a neurton needs to collide with a large, dense nucleus. What I do not...

hi, can we say that life comes essentially from DNA and the resulting proteins?, but it can nly be developed in the right environemental conditions? thank you for your reply

Some people believe that (assuming there is only one Universe) the Universe is so finely-tuned to support life that it is evidence that God exists. If gravity was slightly stronger or weaker, then it wouldn't support the forming of planets and stars as we know it. I've been thinking about...

I know that it begins about 3.8 billion years ago, and hasn't stopped since. But some people said life begins at conception. Is it correct? What is the difference between conception and fertilization?

Hey all, I'm wondering if anyone here can help me try and get things straight in my mind about what I'm going to do next. I'm currently studying Part III (the courses in QFT, Symmetries, Strings etc) and already people are starting to talk about PhD applications, since it seems to be assumed...

Hello guys, I'm a student from Rome, excuse my bad english. I would like to ask you something if I'm not too disturbing.. I'm a student of the first year of University (La Sapienza), and not yet decided which degree to attend: I'm undecided to take physics of computer science. I love physics, I...

If it is claimed that with liquid water, life will probably form, why then would there be only one tree of life on Earth where all life started ? Why is there not a forest of trees, if the conditions are favourable ? Or is it the case there there were possibly more than one and they...

Let me make some definitions. "Personal meaning of life" (PML) is the relationship of oneself current state of existence with oneself desired state of existence. Both change with time thus PML changes with time. "Local meaning of life" (LML) is the relationship of everyone actions taken...

Are there any real life applications of integration for engineers.

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...

What would it be like if a mad scientific genius in real life would cosplay as a fictional mad scientist/wizard? They would probably be the best actor at the convention and get the best cosplay. It would be cheap because they already have lab coats and they are already in character. On...

The question is that the human body contains 0.2% potassium by weight and the natural abundance of 40K is 0.0118%. The half life of 40K is 1.28x10^9 years and I have to calculate the activity in an adult weighing 75 kg. What I tried was to find the decay constant by 0.693/1.12x10^13 hours =...

How can we prove that the mean life time of a radioactive decay is reciprocal to the decay constant?

Life on Mars? The question is not whether there is life on Mars, but whether life existed on Mars long ago.

Homework Statement A falling stone takes .28s to travel past a window 2.2m tall. How far above the window was it released Homework Equations vf=vi+at d=vit+(1/2)at^2 vf^2=vi^2+2ad The Attempt at a Solution vf^2=(6.5)+2(9.81 x 2.2) 2.2=(x)(.28s)+(1/2)(9.81)(.28^2)

Since I was so wrong about the Delaware election, as a self imposed punishment I am using an avatar that is a picture of me and Mike Castle. On a side note I gained like 60 pounds this past year. I think it is the meds. It could not be all the crap I eat without moving around too much.. Nah..

As an aero guy, I'm starting to see so many things in our world mirroring fluid flows, from music to movies, aikido, complex human interrelationships, politics... Life. Mothers, sons, wives. It's like our relationships with others are as interconnected by facebook as they are by anything...

When raising a child, is it most important to stress the practical aspects of life, and the reasonable limits of expectations in life, based on the life experience of the parent, or to stress the possibilities for life, and to encourage following ones heart, or dreams? In another sense: Is...

This is not a homework question but rather a real life problem I need to work through. Sorry if I have used incorrect terms but I have not done any physics in 10 years and have forgotten everything so I was hoping someone would be able to help. Homework Statement How much effort would it take...

I was watching NOVA today and they mentioned a series of videos featuring different scientists and engineers. Basically, they describe what they did on their free time when not involved in their field of study. http://www.pbs.org/wgbh/nova/secretlife/scientists/neil-degrasse-tyson/ -To see...

Hi I'm just wondering how other life forms on different planets might be able to evolve. Some of my thoughts: 1) other life forms don't necessarily need oxygen do they? On this planet we use oxygen to generate energy through combustion. Other life forms could generate energy by i)...

Hi everybody! First, this is not about physics in a strict way. I mean, I have a lot of question about decision in my life, and then I want to know some point of view. So if you tell me your opinion, I will be really grateful. I finished physics the last year, I was working in high energy...

Extraterrestrial life usually implies planetary biota. What about that on stars like brown dwarfs?

Is it really "bad" for life if the oceans are acidifying under so much CO2? CO2 levels were much higher 100 million years ago and I'm sure this implies that ocean acidity was also higher 100 million years ago. And yet, marine life still thrived. Not the same kind of marine life as today, but a...

Since everything is made of quarks and electrons, why use the word "life"? Everything is just physics including "life" so why not present it that way? It's all interacting particles, some interactions are just more complex than others. Why categorize things as living or non-living? What does it...

Homework Statement The half life time of mesons \mu with velocity 0.95 c has been obtained experimentally as 6\times 10^{-6}s. Calculate the half life of those mesons in a system in which they are at rest. Note: It shouldn't be "half life" but something like "mean life" or something like...

This is great news! Mother nature has a remarkable ability to spring back. This is very happy news for the fishing and tourism industry in Louisiana. http://www.mb.com.ph/articles/271969/oil-spill-area-coming-back-life

I've recently decided to shift from engineering to an MBA. I am in my final year of EE and once this year is over, I'll be getting into an MBA. It wasnt an easy decision to come to, and the one part that really gets to me is that I'll be giving up math! I mean, I know I won't completely give...

So I know that when an electronic device powered by batteries is turned off, the batteries actually continue to move charge and will lose energy over time. I keep emergency flashlights in storage and I usually put one battery in them backwards so that a circuit is not completed. What I want to...

Is it possible to create life by subjecting pure elements to the right conditions , basically can u create life out of nothing but atoms/molecules

This is insane... http://timesofindia.indiatimes.com/sports/football/top-stories/Failed-North-Korean-World-Cup-coach-fears-for-life/articleshow/6242571.cms

Is life an example of extremely low-entropy system? Why? Could someone tell me more about that? (I know it depends on the way I define life, but I mean in general, we all know what does life mean) Thanks

What is a day in the life of a PHYSICIST like?? Hello, I'm about to begin college at the OHIO STATE UNIVERSITY for ENGINEERING PHYSICS and I have a couple question I would like answered. What type of jobs would be available for an ENGINEERING PHYSICS major and what is a day in the life of a...

It takes an infinite time for complete decay of a radioactive element. but on the same time we calculate the half life of radioactive material i-e T-1/2 = ln 2 / lamda. is that means that if we double the half life time we could reach the total life time of radioactive decay so on contrary we...

Engineering that is indispensable for society or improving peoples life?? maybe EE? Well I enjoy physics and math, but not to much chemistry becouse i suck at it. I want a career that really make an impact in peoples life, but not in a superficial way. I was thinking in Electrical Engineering...

I recently took Calc AB and have signed up for Calc for Life and Social sciences. Can someone tell what to expect in my new class and if AB is/was an appropriate prep. class? Thanks.

Homework Statement I've decided to research Conway's Game of Life for my science project. and I can't seem to find any equations that would fit as Life's physical laws. Any ideas would be gratefully received. (Please keep in mind that I am merely a high schooler) Homework Equations...