Umang , will u tell me something abt this test???

I ve answered ur friction and ice qn too

I have a small controversy....

Do u think that the frictional force will be absent when the body is moving with constant velocity????????

Please tell me if I m wrong                 kghedriu

 

Hai!!!!!!!!, I had some advise to ask u which is in the column "arihant or tandon"  Pleeeeeeeeeeeeeez check that too and reply me soon

                                                                                  kghedriu

Resonance occurs in the foll cases:

1)

2)lone pair

3)-ve charge

4)+ve charge

5)unpaired electrons

                                                            kghedriu

I think u ve got the point tejasvi. Bcos, two -OH grps are not suficient to create steric hindrances (clear from the existance of stable Al(OH)3  ) The reason u gave can be easily undrestood if one studies the mechanism of such reactions.

 HEY, I ve posted a message 2 u in the column 'Arihant or Tandon'

Pleeez see                                       kgh

HI

See, assume two persons 1,2 standing on a large rotating disc. 1is at the centre with a ball in his hand and 2 is on the edge. When 2 throws the ball to 1, it actually misses him . A person on the ground knows that this is because the disc had carried away 2 while the ball didnot deviate its st line path (here, the ball is not rolled on the disc)

But for 2, he feels that he is at rest and the ball has actually moved. He accounts this to a pseudo force called Coriolis force. It comes into picture only when the ball has certain velocity.....ok

Hey, i ve answered ur rainbow qn...pls see                     kgh

Hi Umang,

Good guess, I m a south Indian and u can call me by any name u like

I am of class XI preparing for IIT-08

Hi Harry

U just go to the last of contents. At the bottommost, u'll find something called "INDEX" U REFER THOSE PAGES FOR THE TOPIC U WANT. U'LL SURELY FIND OUT this applies for morrison and solomon

In case 2 when u take smaller steps, it is actually an advantage to you bcos:

Say u have 10m of ice.We know that both smaller and larger steps give u same friction. But, in a larger step,say of 5m, u will cross the pond in two steps and it means u get friction twice. In a smaller step, say 2m, u get friction 5 times which is of greater advantage. Hence, smaller steps are preferred.

Hey Umang, I think:

Though I dont exactly know the shape of rainbow, still it appears in the form of a ring cos water drops act as a prism and u know that when u view an object from a prism, only at certain angles, u get a clear vision of the object.At the rest of the angles, the object may be partially visible or may not be visible at all. The same applies with the rainbow.When u look from ur position, it looks like a half ring and u try to go too close to it (say by a plane!) and it won't be visible at all!!

Effect of gravity is constant for both. Hence, the effect should be caused by resisting force. As m is inversely proportional to a when F is constant, we can say easily that A rises higher than B

Anyway, thanks for ur question

Hi Umang,

I can explain u what coriolis force is.....

But, for more clarity, refer pg 100-101 of a book by name--"Mechanics and thermodynamics" by Basavaraju and Ghosh (TMH)  I m sure that u'll njoy the book. By the way, I posted my name in the same column where u asked it