Years Definition and 595 Threads

How do you prove that 1 parsec = 3.26 light years? My physics bok have a really harsh explanation for this. :frown:

If Bush wins, will it be, as Kerry has put it "4 more years of the same", or will Bush and his administration finally admit some mistakes and take some measures opposite to previous actions to correct them? I'm really worried that the Bush administration is so ideological that they simply...

In the other thread we were discussing the http://www.unc.edu/~sstaff/images/hockeystick.jpg as valid proof for global warming due to anthropogenic increase in greenhouse gasses. However the purpose of that thread was more philosophycal, intended to identify the truly important. And it was...

If i had only was born 100 years ago... I wished i was born when physics was easy,perhaps i could have developed realtivity if i had born 100 years ago,i don,t think Einstein was a genius but only was lucky enogh to be born in a time and a country when physics was easy,the same case can be...

My mom works as a Physical Therapist at a children's hospital. The head pharmacist at the hospital was in the Army Reserves, and completed his required duty over 20 years ago, he's now in his early 50's. He just recently was called up for duty and sent an email to everyone at the hospital saying...

It has been at least 5 years since my last math class and I am kinda struggling. The question is: Use the intermediate value theorem to show that there is a root of ln x = e^-x on the interval (1,2). Find the correct root to 3 decimal values What i have so far f(1) = ln 1...

hey guys, I'm new to physics .. and to be frank it seems scary. :-p anyways i was wondering if anyone could help me with this: The diameter of milky way is 1.0 *10^5 lightyears (ly). The distance to Andromeda is about 2.0 million ly. If a scale model represents the milky ways and andromeda...

What do you think the world will look like in ten years, what specific areas of science do you see taking off. I see massive intergration of computers resulting in huge amounts of data needing huge computers that all are connected for optinal effeincey AI should also grow hopefully dna...

Interesting stuff.

Put simply, I would like to know what some of you think the future will bring in five years. What do you think the world will be like in the year 2009? What will the population size be? What will the latest gadgets and electronics do? How much will we rely on oil, alternative sources of...

I was just thinking, nuclear fusion in the core of a star produces a gamma ray burst that takes about one million years to reach the surface of the star where it becomes visible light. Why does it take the gamma ray one million years to reach the surface if it is traveling at light speed? I...

Homework puzzle from 15 years ago never solved - Please Help! :confused: I had this puzzle in one of my math classes in Jr. High - for 15 years I have been trying to solve it - no one would ever give me the answer, and I was sick on the day the teacher gave it. He has since retired, and no one...

http://story.news.yahoo.com/news?tmpl=story&cid=1894&ncid=1894&e=1&u=/ap/20040625/ap_on_sc/space_elevator

A year from now marks 100 years since Albert Einstein wrote his paper on electrodynamics of moving bodies and sent it to Annalen der Physik. I assume there will be some hoopla about it next year, including conferences, more books and magazine articles, and lots of debates. But I haven't...

Someone now says that the penguins can fly because they will have developed to a level that their wings are larger than now, they have many feathers, and so, flying is possible... Would you please tell me if that guy is correct or just crazie ? Thank you, >>> This should sound like a...

What are your thoughts on how this world will be different 20 years from now? Here are my thoughts. 1. Virtual reality will be as widespread as the internet allowing you to escape the human world. 2. Robots are your friends. Every household will have one. Just like the Jetsons :smile...

Time Travel isn't really TIME Travel, but, more so, "World" Travel, because "Time" is non-existent. A Black Hole or a Wormhole is a gaping hole into another "world", and a "Time" Machine just let's you physically pass through one of those. Since I don't know ANY Physics(well, except Thermal...

einstein died. apparently he was cremated on the same day? it should be an international holiday.

I read that the determining factor of a Black Hole being created is when the mass of an object divided by its radius exceeds a critical point. If the number is more then this critical point then it is a Black Hole; if the number is less then this critical point then it is not a Black Hole...

I can't believe this guy is still around. http://www.liddyshow.us/ Tonight Tsu and I were watching a documentary about Watergate -Watergate: Legacy of Secrets - on Discovery Times. I saw this show once before but I had missed something that Liddy says during his interview. While head of...

I would like to start this forum and encourage people to add to the dates below regarding how they think dicoveries and 'firsts' will unfold in the future. The timeline below is nothing more than a vague idea at how I think things might occur... :) also...I've puposely not included things...

yes, we'll all be dead, but hey, it's fun to speculate. I remember reading 3001 by Arthur C. Clark, and in the book they're laughin at all the futuristic references from this time period, like star trek. Because in actuality they haven't even left the solar system. So what do you guys think...

A friend told me that if a galaxy is 13 billion light years away, it means the universise is at least 13 billion years old. I don't get it? So, light years does measure time? Or is it because this new "galaxy" found is the oldest galaxy in existence? He explained it to me that it took...

Fossil fuels are going to become extremely expensive, a depression will set in which we will never leave. Unless we start building acres and acres of solar, hydroelectric dams, geothermal and well stocked nuclear power plants now, we will be unable to support all but the most essential of...

omg help! ok ppl I am having trouble with this problem... A glacier moves with a speed of 41 nm/s. How many years would it take for the glacier to move .74km? answer in units of yr. ok and this is what I've done... i changed 41 nm to km which i got as 41*10^-6 ... and then i divided...

http://news.bbc.co.uk/2/hi/science/nature/3361925.stm

How many Earth years is Jupiter's orbit around the sun? is it 162 years?

http://space.com/scienceastronomy/solar_flare_031028.html

Bear with me, the info is from cnn.com, but i found what it had to say interesting...perhaps living nearly 100 years ago wasn't so bad? http://money.cnn.com/2003/10/02/pf/taxes/irs_birthday/index.htm?cnn=yes at this rate, in another 100 years the United States government will have the tax...

I (for lack of a better n more fitting term) suck at math, but I'm pretty ok at grasping physics concepts. So I'm wondering... If I were to minor in physics, how many years of the average college curriculum could I last before the topics become entirely too mathy? I should add that I have...

http://www.guardian.co.uk/arts/news/story/0,11711,1048387,00.html NOTE: I couldn't think of a better place to post.

Someone asked me this today, and I couldn't think of one thing that was obviously more important than the rest. What's your opinion?

...what a disappointment, the terrorists are winning the war on terror, every day.

http://www.newscientist.com/news/news.jsp?id=ns99994136

http://www.mercola.com/2003/feb/22/petabyte.htm that's 1 million gigabytes, or 1,000 terabytes. Good lord what will we do with it? Ya I can picture going for a walk and listening to my MP3 player with- every song ever written in the palm of my hand. the 24 million texts in the library of...

http://news.bbc.co.uk/2/hi/science/nature/3161695.stm

By whatever means that you may imagine, is this possible? I say yes.

What do you think technology will be like in 20 years time ?? I am always interested in upcoming computer and technology related things, and thought there may be people around here following certain things! the only real stuff i know about is new Organic monitors and computer storage things...

"I think we are knocking at the door of immortality," said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that's a conservative estimate." http://www.cnn.com/2003/HEALTH/07/19/aging/index.html

"The ancient dates for the paintings cast little light on the mystery of who made them and why, but it suggests that whoever the painters were they came well before the Aztecs established their culture in central Mexico some 3,000 years ago."...

What's your age?

How is it that we are able to see galaxies that are billions of light years away considering that we are presumably traveling from the same origin? Would that somehow mean that the distance between the two galaxies was growing at a rate greater than the speed of light? If not, why not? The...

I've seen some pretty crazy things drivers have done. Just today I saw someone pull a U turn right in front of me going down a one way road! I say test drivers every 10 years. I'm willing to put my tax dollars towards that.

check this out...its funny A taxi passenger tapped the driver on the shoulder to ask him a question. The driver screamed, lost control of the car, nearly hit a bus, went up on the footpath, and stopped centimeters from a shop window. For a second everything went quiet in the cab, then...

Ok, I've just been reading this http://www.cem.msu.edu/%7Ecem181fp/antimatter/antimatter.html and it says that even if Fermilabs increases its production of antimatter to 5 times its current output then it would still take another 200,000 years to get 1 miligram of that stuff... I know this...