Years Definition and 634 Threads

"So what exactly has changed in physics in the last 20 years?" So I was at a Christmas party joking around with one of my friends who is in electrical engineering and he said something basically to the effect of "Well physics hasn't changed in like 50 years" Which is actually not a bad...

I'm a biochemistry major (chemistry focused, not biology focused program) and I have just completed the fall semester of my junior year. I completed my first semester of physical chemistry (chemical thermodynamics) and I really enjoyed the mathematics. My major only requires calculus 1 and 2...

9 years ago, farmer Tor Grønningen brought home to she-goats, a mum and a wilful daughter on his pickup. The first thing the daughter goat did when he opened up the pickup, was to run off into the wilds. And there, she has stayed, only occasionally neaking down in summertime to snatch some...

After harboring the aspiration to read Astrophysics and Mathematics (I love all things adhering to abstract and logical reasoning; as such game theory, logic, military strategics, mathematical proofs ), I'm now in a 4 years double major undergraduate program in one of the well-know prestigious...

Homework Statement I am given a model where for an accelerating universe the redshift changes according to the following equations (given in part b). For this model and assuming that H0=70km/s/Mpc, evaluate the change in redshift over 10 years, for a source at z=1 and the change in recession...

Homework Statement Please help me solve this problem... Given T(1/2) of U-235 = 7.04x10^8 yrs (0.7%) T(1/2) 0f U-238 = 4.468x10^9 yrs (99.3%) Calculate percentage of U-235 & U-238 at the time of creation of earth(~4.5 billion years ago) Homework Equations N(t) = No e^(-λt) The...

An astronaut must journey to a distant planet, which is 186 light-years from Earth. What speed will be necessary if the astronaut wishes to age only 13 years during the round trip? (Give your answer accurate to four decimal places.) _________c 13y = to 186ly = t to/t = (√(1-(v^2 /...

I am BSc Physics graduates 3 years ago . After graduation I went into a totally different field "Accounting". (allow me to skip the reason here) I am so regret now. My passion is still in science and I want to return to the world of physics and hope to be a researcher or any professions in...

Hey guys, i really need your help on this. I completed a 3 years BSc in physics in april 2013. However i am not at all satisfied with my preparation (the teachers at my college were hardly interested,yes that's the state of pure physics in my university!). I am planning to take a gap of a...

So I have been reading this forum for a while and I have heard more than a few people say things like the employment rate for physics PhDs is worse than it is in the humanities and way, WAY worse than for med school, so that doing a physics PhD as opposed to a med school degree is a huge...

I still want to be a physicist. I want to go back to school next fall, but haven't really made plans yet. I went to university for one year after high school, failed one semester and withdrew the next before being kicked out of the dorms for smoking pot. The next 3 years I attended a local...

Dear all, I genuinely cannot fathom a reason why most universities have a strict policy against hiring postdocs with five or more years of postdoctoral research experience. Could somebody please elaborate? I cannot imagine anybody benefiting from this arrangement. 1. Universities and...

As outlined in this article - http://nz.finance.yahoo.com/news/anniversary-great-recession-whats-changed-145605229.html - today marks the fifth year in which the financial crisis 'started'. I quote 'started' as the initial lead up occurred when those with very terrible credit ratings were...

I was just wondering if this is a common thing that people do. I am a junior in college and I had a software engineering internship and enjoyed it very much and I think it'd a career i'd enjoy. However I've always wanted to get a phd in computer science and do research in computer graphics. At...

http://en.wikipedia.org/wiki/Dashi-Dorzho_Itigilov Is there any explanation for this? Maybe he pumped himself full of some kind of chemicals before he died and told them to exhume him, considering he knew medicine and pharmacology?

Found this article: http://news.nationalgeographic.com/news/2010/10/101027-science-space-universe-end-of-time-multiverse-inflation/

i am currently a high school student in egypt , and due to the stupid difference between education systems , the high school certificate from egypt is only equivalent to the GCSEs in england , so if i do go to england , i will have to spend another 2 years of my life taking high school AGAIN but...

Greg Bears Book one: Anvil of Stars Book two: Forge of God Anyone else a fan of these books? I guess I am just a hard scifi addict.

Afternoon all, just a general question I'd like to ask and I'm interested in your responses. Look how far technology has come in the last 70 odd years. From the first black and white tv to HD flat screens. From propeller driven planes to stealth fighters. From the Z1 computer to the modern Intel...

The Battle of Gettysburg was the decisive battle of the American Civil War, fought from July 1 to July3, 1863 just south of the Pennsylvania town for which it is named. It was a Union victory but the southern commander Robert E Lee escaped with a good part of his army intact. The war would last...

Homework Statement The half life of americium-241 is 457.699 years. A typical smoke detector contains 33.1 kBq of americium-241. Determine the amount of americium-242 remaining after 15 years. Homework Equations A=Aoe - - 0.693t/T 1/2 The Attempt at a...

I dropped out of UCLA about 10 years ago. Have done some real estate since but nothing much with my life. I'm planning on going back this year and getting my bachelor's degree. I'm now 33. Yea I know. I screwed up by dropping out and not finishing what I started. But I guess now is better than...

The first stars formed when distances were 9% of their present size. The solar system began forming when distances were 70% of what they are now. Andromeda galaxy will make a first pass through Milkyway when they're 129% of present. Which do you find more meaningful and intuitive for...

This is still a vivid memory for me. https://www.youtube.com/watch?v=hkg-bzTHeAk

Radioactive decay of granite ---> How many years does it take? Homework Statement Radioactive decay of granite and other rocks in the Earth's interior provides sufficient energy to keep the interior molten, to heat lava and to provide warmth to hot springs. This is due to the average release...

I would like to know about the good institutes in India offering 5 years integrated Msc course in Physics

See the effect it's had on music sales here: http://money.cnn.com/interactive/technology/itunes-music-decline/ Click the buttons to compare number of units and "sales" (number of dollars) versus time for various music formats.

Every 17 years, the cicadas return to the north east united states. In the next few weeks it is estimated their will be ~1 billion cicadas per square mile. http://news.yahoo.com/blogs/sideshow/cicadas-coming-151907579.html

That sounds pretty obvious. But it wasn't because of the interpretation of evidence. The charcoal / soot required as evidence was not available. In a nutshell. Robertson et al 2013 explain that it was merely a misinterpretation. The charcoal is simply dilluted by the debris from the...

Next year, I'll be a full time student. Due to poor planning on my parents part, the amount of money saved for tuition and other university costs is not as high as it should be. In order to avoid having to ask my father for money (which he wouldn't be too keen on giving me), I've been thinking...

I'm 26 years old , been thinking about going back to school for the last 2 years to pursue a career in mathematics. Never went to college , stopped my education at the end of high school where I had multiple personal problems that are now more or less solved.Always been strong at math since I...

How big was the Universe 13 billion years ago?? If we look from the Earth, in opposite directions, at objects that are 13 billion LY away, they are 26 billion LY apart. We are seeing them as/where they were 13 billion years ago, so they must have been 26 billion LY apart then. This...

"Foundations of physics" Special Issue: Forty Years of String Theory http://www.springer.com/physics/history+&+philosophical+foundations+of+physics/journal/10701 If this has already been mentioned feel free to delete this post. Articles free through march, A Critical Look at Strings (Carlo...

Is it possible to use celestial coordinates which were taken 50 years ago? What kind of inaccuracy can we expect (give the answer in degrees)? Could I say that it will be about 0.3° error assuming that around the year 130 BC, Hipparchus compared ancient observations to his own and concluded that...

http://seattletimes.com/html/nationworld/2020294573_albatrosseggxml.html Hmmm...a mom at 62. Not sure how wise that is. She was in the news a few years ago for surviving a tsunami: http://news.discovery.com/animals/the-rime-of-the-ancient-albatross-110310.htm She's now my...

Light years-I just don't understand how something as subjective as visibilty, is used as a major indicator of distance. Isnt that subjective. What if some species had a million times the eye power than us humans, wouldn't they view the distance of let's say stars very differently because it...

I have a W-2 from 2007 which I never filed for an income tax refund... is it still possible to file this?

Or more precisely from advent of the gramaphone and "talkies" until today. I am geussing it is 4 beats per measure, but why? I am asking with respect to how iambic pentameter could have become predominant back in the day, if poetic meter is ultimately derived from musical time, as that would...

I was originally a Physics major going to start my upper-divisions in the fall. However, a couple days ago I talked with a civil engineer and was genuinely interested. As of right now, I went and reviewed thoroughly much of my lower division physics and math courses courses (up to quantum...

says that computing power at an economic price roughly doubles every year. this relies on the fact that we can stuff more transistors into smaller spaces. we won't reach quantum limitations until atleast 50 years. where will we (humans) be by than?

if the first known human fossil is 200k years old why the earliest known human civilisation is just few thousand years old? Why there was no reasonable developments for a very large time like 190k years?

Probably can't teach about this in the Bible belt... http://www.google.com/hostednews/afp/article/ALeqM5hISS_RrQOpDbJ9sk84ActLvv-6ZA?docId=CNG.9484301c0f281a31e8383bf96341f10b.471

So what do you want to become? I personally find that my answer is a variable of time and ... and would be helpful to know what you all want to do now... at present I want to be a. Soldier - reason being War and Peace b. Civil Engineer - My present branch of study c. Computer Science Engineer...

I need to find the surface tension of water and how it is effected by different kinds of soap. I am unsure how to find the surface tension of a liquid though. Please and thank you! xoxo Best wishes! NERD OUT. ∞ Homework Statement ... Homework Equations ... The Attempt at a...

Hello to all, I have been out of high school for some time now, since 1994 to be exact. So in 18 years I haven't had any direct contact with any algebra or any such math in some time. Actually I can't remember the last time I was asked to do an equation; until now. I'm currently at a CC and...

I'm a sophomore in HS and am planing to go into nuclear or astrophysics. I am wondering what I should be doing in preparation for going into these fields? I am in honors chemistry and honors trig/pre-calc (with 98% in both classes) this year and will be taking AP Calc and physics next...

There has been a series of papers recently published that provide observational data that indicates that something is cyclically abruptly changing the geomagnetic field. The rapidity of the observed geomagnetic field changes cannot be explained by a core based mechanism. There is no...

"Radioactive waste will stay dangerous for hundreds of thousands of years" There's one statement which's always used by people opposed to nuclear power - that the waste will stay dangerous for thousands, ten thousands and even hundred thousands of years. But I'm wondering - is this accurate...

Hello, so due to my job contract I cannot return to college for 4 years. I only graduated with a 2 year degree in business and want to go back to do an engineering degree. The highest math I have completed is trig but that was years ago I am 25 now. So now I am on my path to return to school for...

Recently BBC made a photo clip on LED with audio from the inventor Prof Nick Holonyak himself. "LED at 50" http://www.bbc.co.uk/news/technology-19886534 It's really inspiring. Does anybody knows the music played behind?