Search found 441 matches
- Wed Dec 22, 2010 4:46 pm
- Forum: Astronomy & Astrophysics
- Topic: Weather Forecast
- Replies: 8
- Views: 3678
They have weather predictions; but of course they are usually wrong. So, they have control centers from where they can control the probe/robot just like a remote controlled plane. I don't think there is any "biggest" problem. There are lots of small problems and engineering details, all of which nee...
$9R^2 \ge a^2+b^2+c^2$ and $9R^2 \nless a^2+b^2+c^2$ are the same. I am not sure what you mean by "definition" of the statements. The second part of your question is answered by the definition of real numbers. By definition, for any real number $a$ and $b$ either $a \leq b$ or $b \leq a$. So, at lea...
Planet's are not part of stars and Earth was never part of the sun. A star system is formed from a gas cloud. When a part of the cloud becomes very dense, and collapses due to gravity and starts fusion, it becomes a star. Planets are formed from nearby (but different) regions of the cloud where the ...
- Mon Dec 20, 2010 6:06 pm
- Forum: News / Announcements
- Topic: Posting BDMO 2013 problems: ZERO tolerance!
- Replies: 7
- Views: 10718
Hi everyone; as you all know the divisional olympiads have started. Good luck to all participants. Please carefully note that it is forbidden to discuss any problems from the divisional Olympiads of this year before January 25, 2012. Doing so will disqualify you from BDMO and ban you from the forum....