Life Definition and 965 Threads

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)...

[FONT="Comic Sans MS"]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...

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...

Hello everyone, I'm about to finish my undergrad physics degree, and I'm going to apply to a US grad school for a physics PhD. I'm not from the US. Once I get my PhD, the logical next step would be to look for a postdoc position in the US, as I want to dedicate myself to physics and possibly...

Hey PF, I am a third year undergraduate who has been working in a HEP experimental group for two years. So I have had a good deal of experience with the research process, and I know basically what the grad students and postdocs spend their time on in my group. I am still completely...

When I was in high school my grades were poor, no more than a B. In recent years during my senior year I suddenly had a huge interest in physics and math. I began to study day after day and eventually I made it to Multivariable Calculus during my final years in high school (I applied for...

can anyone tell me about various stages of life of a star? when does a neutron star, supernova, pulsar form?

I wonder how and where does resonance is applied in our real life. Any example?

I heard on a recent podcast that most astronomers and physicists of the early 20 th century, if they thought about it at all, believed that the universe always existed, i. e. it had no beginning. Even Einstein accepted the Steady State Theory, along with many others. How did these astonomers...

Does anyone remember the Nasa image of the 'segmented worm' found on Mars? I had recently seen a documentary on PBS about fractals in which it was stated that all biology is based on fractals and that if one could establish a fractal pattern in something, then it was certainly biological. I...

Do you have a will, and a living will that specifies what types of medical interventions you will allow once your body fails you? My wife and I have been pretty dedicated to establishing and modifying both, as needed. Even with both, once you have lost mental faculties (like my mother-in-law...

I'm doing well in undergrad, taking it easy w/ a below average courseload. But i'll actually graduate early due to AP credits. I'll get at least an MS (in statistics maybe?), but my plan sounds unconventional after that. I'm a prty quite person and love my peace of mind more than anything...

I'm a collage student, I rented an apartment flat with my 2 friends. We bought all house things by each of us paying 1/3 of their price. An now we are to break apart, I decided to make a drawing (like lottery) to decide who take which house hold. Assume that, A, B, C: Names of three...

What's the probability of a universe capable of life? In other words, what's the probability that the laws of the universe allow for life? And if the probability is low, does that imply there are infinite universes? Or there is a "god"?

I was watching a video on the JIMO mission to Jupiter's moons: Ganymede, Europa and Callisto. What is the approximate chance of life for these moons? And what about Titan, and Enceladus (misspelled?), can they be ruled out? What is the likelihood for water on these moons? If there is...

If we pick a target star 1000 light years away, from the point of view of an observer on Earth we will need at least 1000 years to send a ship there even with the ship traveling near the speed of light. But, from the point of view of someone on that ship that travels with near the speed of...

The Backyard Chickens The Backyard Chickens gives you information about raising chickens in the city. We try to provide information to help you have a successful and enjoyable time raising your chickens.

I was curious what some factors may contribute to free falling objects not falling at the same rate as would be expected in a vacuum. I remember from physics classes that two objects should fall at the same speed regardless of their weight. I know that surface area and air resistance plays a...

Are there plans to treat the BP oil spill with oil-eating bacteria? http://news.sciencemag.org/scienceinsider/2010/04/can-microbes-save-the-gulf-beach.html

BBC News It's going to be a pretty interesting field to get into now.

http://www.ted.com/talks/viktor_frankl_youth_in_search_of_meaning.html

With the confirmation of water on at least two other major bodies in our solar system so far (Mars, Moon), has this expanded the range of the "habitable zone" when searching for locations of possible life in the solar system?

I think I've screwed up my future. I am in my third year, double major in physics and math (math major more to supplement my understanding of physics), and this semester was just horrid. I made the mistake of moving off campus, working two jobs, and in the time I had to study, could not focus...

-------------------------------------------------------------------------------- The origin of life and humans is unknown.That is to say that humans do not know how they came into being and why humans come to this world. We only know that life and humanity is the product of natural...

Another "Late in Life Physics" thread I should really say "Really really late-in-life" I'm 56. About 20 years ago, I flushed myself out of grad school (physics) largely over just being fed-up. Lately I've been reading again because of the huge number of very good books immediately...

Does a jet engine have a life span?

i am taking upgrading, and one of the main reasons i failed physics 30 to start with was due to half life. the book can't explain it good enough to me and either could my teacher. so i have a few questions that i would appreciate a starting point for. How much time elapses before 90% of the...

Homework Statement What mass of Na2 SO4 has an activity of 10.0 mCi? Sulfur-38 has an atomic mass of 38.0 and a half life of 2.87h Homework Equations Half life= 0.693/ k Rate= kN The Attempt at a Solution I'm not sure where to begin the sulfur-38 part is throwing me off All I...

Just the very things: First:http://bluecanarynightlight.com/" Then:http://www.fotosearch.com/photos-images/lighthouse.html" Some people know what I'm talking about.