## Search found 441 matches

Wed Dec 22, 2010 4:46 pm
Forum: Astronomy & Astrophysics
Topic: Weather Forecast
Replies: 8
Views: 3603

### Re: Weather Forecast

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...
Wed Dec 22, 2010 3:09 am
Forum: Algebra
Topic: Inequlities defination.
Replies: 8
Views: 3297

### Re: Inequlities defination.

$9R^2 \ge a^2+b^2+c^2$ 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...
Tue Dec 21, 2010 6:26 am
Forum: Physics
Topic: Dependance of "g"
Replies: 51
Views: 14437

### Re: Dependance of "g"

If you change $m$ then $F$ also changes proportionately and thus $g$ remains unchanged.
Tue Dec 21, 2010 3:18 am
Forum: Astronomy & Astrophysics
Topic: গ্রহ নক্ষএ
Replies: 25
Views: 17981

### Re: গ্রহ নক্ষএ

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: 10628

### Posting BDMO 2013 problems: ZERO tolerance!

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....
Mon Dec 20, 2010 6:05 pm
Forum: Higher Secondary Level
Topic: Matrix
Replies: 13
Views: 5096

### Re: Matrix

এইটা কি transpose এর বাংলা? আগে কখনো শুনি নাই। কই পাইলা?

যাই হোক, আমি জানতে চাইসিলাম, transpose এর সংজ্ঞা।
Mon Dec 20, 2010 3:06 pm
Forum: Social Lounge
Topic: Favorite problem/theorem
Replies: 12
Views: 4670

### Re: Favorite problem/theorem

ওহ! ফার্মার শেষ উপপাদ্য। যদিও জিনিসটা মোটামুটি উপযোগহীন; কিন্তু পৃথিবীর গণিতবিদদের শতাধিক বছর ধইরা ভুগাইতে পারসে।
Mon Dec 20, 2010 2:17 am
Forum: Introductions
Topic: Introduction
Replies: 2
Views: 1561

### Re: Introduction

স্বাগতম। আশা করি ফোরাম তোমার কাজে লাগবে।
Mon Dec 20, 2010 2:15 am
Forum: Higher Secondary Level
Topic: Matrix
Replies: 13
Views: 5096

### Re: Matrix

$A$ and $A^T$ are not the same.
Let's go step by step. What is your definition of transpose matrix?
Sun Dec 19, 2010 4:31 am
Forum: Geometry
Topic: Silly Questions
Replies: 2
Views: 1725

### Re: Silly Questions

Euclidean geometry is plane geometry. There is no such thing as Euclidean proof.