Talking about science is a good way to gather peoples of different minds to build a nice world. Here we can share scientific lessons, facts and news from different fields such as math, physics, engineering, medicine and so on...
19 Members

We know very little, and yet it is astonishing that we know so much, and still more astonishing that so little knowledge can give us so much power. Bertrand Russell

.................http://www.nap.edu/openbook.php?record_id=4962...............


HELLO MY FRIENDS :
please enrich the group by your scientific discussions and include source of the material you present in order to let others rely on what you say and also let them know about sources in which they can find more info....

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Comments

  • Sahar November 3, 2011 11:09

    :)

    Hope th best for you, Dear Zahra.

    Please do your best.

    I'm sure that you will achieve what you like.

    Good Luck

  • Sahar October 19, 2011 21:45

    :)

    Thanks!

    But where are you, Zahra?!

  • Sahar September 8, 2011 7:33

    Hi Skoon!

    Welcome.

  • Sharifa Bahri (SkoonAlBahr) September 8, 2011 4:31
    It seems an interesting group ..
  • Sahar September 7, 2011 18:51

    Hi, dear Sue.

    Welcome!

    Nice seeing you here So.

  • Emilie August 25, 2009 0:42
    Hello dear Zahra:
    I am very happy to join your new group..It's very lovely..Have all my wishes to be happy ..
    Your sister and friend:
    Emi.
  • Nadiyah August 24, 2009 5:44
    Hi Zahra
    I am here to join your group
    thanks your invitation,hope it helps to improve my English
    success for you ...

    -Nadiyah-
  • Nafis August 23, 2009 14:20

    Hope you like this rabbit since I took the photo.
    Nafis
  • Nafis August 23, 2009 14:18
    Dear Zahra, Thanks a lot for your invitation.
    Best wishes,
    Nafis
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Forum

Geometry (I)

Imagine that we have 2 parallel lines and there are 5 points on each line.How many triangles can we make by them?  1-      1002-      2003-      1504-      300

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Started by Sahar
2 Replies

Let's study "Mathematics" with each other! (7)

1.sin-1 x + cos-1 x=? 1-    π/42-    π3-    π/24-    2π      *******       *******       *******       *******       *******2.If, -π/2 < Ө < π/2Sinhx= tgӨ Then, Coshx=? 1-    cos Ө2-    csc Ө3-    sec Ө4-    sin Ө      *******       *******       *******       *******       ******* 3.2 Arctg (1/2)=? 1-    Arctg (4/3)2-    Arctg (3/4)3-    Arctg (2/3)4-    Arctg (3/2)

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Started by Sahar
0 Replies

Photos