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Toppers' Discussion Forum

Discussion Board Class Subject  

Tue October 21, 2014

gravitation

WHAT ARE THE CAUSES OF BUOYANT FORCE

By

CBSE IX Physics

Sun October 19, 2014

Buoyancy Force

Can anyone give more information on buoyancy force?

By

CBSE IX Reference Notes

Sun October 19, 2014

CIRCULAR MOTION

What are the major differences between centripetal and tangential acceleration?Which of them remains constant during uniform circular motion and why?What are the different ways to calculate either of the acceleration?

By

CBSE XI Chapter Notes

Sun October 19, 2014

how to animals reproduce?

what is meant by niche?

By

CBSE X Biology

Sun October 19, 2014

WHY DO WE FALL ILL?

Which of the following bacteria cause peptic ulcer?  Helicobactor hepaticus  Helicobactor pylori  Helicobactor chlolecystus  Helicobactor salomonis

By

CBSE IX Biology

Sat October 18, 2014

solar system

Hi online friend please give me help solar system

By

Thu October 16, 2014

triangle chapter

In given fig PR<PQ and PS bisect<QPR prove that <PSR>< PSq

By

Thu October 16, 2014

Answer pls....

Anyone online,  frnds pls help! very quick 0.1*0.1*0.1+0.02*0.02*0.02/0.2*0.2*0.2+0.04*0.04*0.04=?

By

CBSE XI Chapter Notes

Wed October 15, 2014

ASL

Hello!!!!!!! Please give me ssome tips to crack ASL........ 

By

CBSE X Exams

Wed October 15, 2014

role of parliament

what was the role of parliament in the issue of office memorandum ??????

By

CBSE IX Civics

Tue October 14, 2014

friction

choose the correct option:   rolling friction is smaller than---- 1. static friction 2. sliding friction 3. fluid friction 4. all of the above   on asking the expert,, they said its sliding friction but since static friction is smaller than sliding friction,, rolling friction should also be smaller than staltic friction.. i have doubt whether rolling friction is smaller than fluid friction...  

By

CBSE VIII Exams

Mon October 13, 2014

Use of Trignometry

The angle of elevation of a cloud from a point 'h' metres above a lake is 'theta'.the angle of depression of its reflection in lake is 45 degree.the height of the cloud is- (A)h tan(45+theta) (B)h cot(45-theta) (c)h tan(45-theta) (d)h cot(45+theta)    Suppose H is the height of Cloud and x is horizantal distance form point to cloud. so the hight of cloude from ground is h+H Tan 45 = (2h+H)/x   =>  x= (2h+H)/Tan 45      --------(1) Tan θ = H/x    =>    x=H/Tan θ     - -------------(2)   from (1) and (2)   H/Tan θ= (2h+H)/Tan 45   Find the value of H from above. It is  H= 2h Tan θ/( tan 45- Tan  θ)   Hight of cloud is h+H   so h +H = h +(2h Tan θ/( tan 45- Tan  θ) )   =>  h+H= h(1+tan θ)/(1-tan θ)   => h+H = h (Tan 45+tan θ)/ (1-tan θ tan45) => h+H= h Tan(45+θ)         by using formula  Tan(A+B)= ( Tan A + Tan B) / (1-Tan A TanB)   So the hight of cloud is =h Tan(45+θ)         

By

CBSE X Exams

Mon October 13, 2014

THE MAN WHO KNEW TOO MUCH

WHAT WERE THE FACTORS THAT LED TO DECLINE OF QUELCH . DO U THINK HIS FALL FROM GRACE WAS JUSTIFIED? PLS ANSWER FAST FRIENDS TOMORROW I HAVE TEST

By

CBSE IX English

Sat October 11, 2014

envoriment

if there wont be any ozen layer formed then what would happen?  

By

CBSE X Biology

Sat October 11, 2014

pn the chapter perodic classification

 

By

CBSE X Biology

Sat October 11, 2014

endocrine glands.

if one adrenal gland is removed, the other one gets enlarged to some extent. why?

By

ICSE X Exams

Fri October 10, 2014

ruling the countryside

mention the steps taken by the east india company to bring the mughal rule to an end?

By

CBSE VIII Social Studies

Fri October 10, 2014

help

please answer to my question

By

CBSE XI Project Help

Fri October 10, 2014

science exhibition

can you tell me how to make hydroelectric generator easily at home and which doesn't cost above Rs. 300.

By

CBSE XI Project Help

Wed October 08, 2014

volume of cylinders

what are the applications related to volume of cylinder ????

By

CBSE IX Mathematics

Tue October 07, 2014

atoms and molecules

what is atomic mass ? give examples ??

By

CBSE IX Chemistry

Sun October 05, 2014

Speech - Money

Need to Speak on the Topic "Money" for 2 minute. Give some useful points

By

CBSE IX Project Help

Sat October 04, 2014

Parabolic Reflector

 Need information about this "Parabolic Reflector". Please as soon as possible........................ (We will find this in Science Parks)

By

CBSE IX Project Help

Fri October 03, 2014

hii

everyone 

By

CBSE VII Chapter Notes

Fri October 03, 2014

solve

what should be added to2xsquare-3x-8 to get 3xsq+x +6.       help me how to write constants powers.    

By

CBSE VIII Exams
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