IF

@1    @2   @3 ,     .............................  @8    are the 8th roots of unity then which of the following is(are) correct,

A)        @1  +  @2 + @3 +......................@ 8 = 1

B)      (@1)^3    +   (@2)^3 +...................................(@8)^3  = 24

C)     (@1)^50 + (@2)^50 +.............................................. (@8)^50  = 0

D)    (@1)^48  +  (@2)^48 +.............................................(@8)^48 = 0

@1-----------------------> means that alpha 1 (in the subscript and not coefficient of alpha)

PLEASE ATTEMPT AND ANSWER. RATES ARE ASSURED FOR CORRECT ANSWER+PROOF.

(i do not know its answer.) .

most probably i think that the answer (less than 7) is because the temp. of human body is greater than 25'C and so since ionization of water is endothermic the pH of water becomes less than 7,rather than any hormonal changes etc.

hey what are you saying i said a and b check my post and also check last editing

thanks to both of you

1) please explain that when we cut a spring why does the spring constant of the two resulting springs changes.

2) and also explain the formula for connecting springs in parallel and series

rates assured...

i only know the formula but not its derivation

if the monkey is breathing and losing co2 then the mass is changing so MI should change.

also monkey is doing work to pull in o2.

so shouldn't the answer be a,b.

please do correct me if i am wrong

The heuristic device of pretending an electron orbits the nucleus like a planet orbits a star is sometimes used to “explain” this relativistic effect on the shape of a molecule’s electron which is the three dimensional shape of its potential for interacting (due to its energy level) called a molecular orbital.

umesh sir could you please explain what you have meant by these lines, as i am not to able to understand their meaning

thanks.

please explain what is inert pair effect

SORRY I MADE A MISTAKE IN WRITING THE QUESTION

WHAT WILL BE THE SPEED WITH WHICH MASS   M WILL HIT THE BLOCK WHEN THE MASS m IS RELEASED..

SHOULD BE CORRECTED TO

WHAT WILL BE THE SPEED WITH WHICH MASS   M WILL HIT THE WALLWHEN THE MASS m IS RELEASED..

but most probably i think that the approach was followed for the corrected one.

I JUST WANT TO CLARIFY THAT WHY ARE YOU SUBTRACTING 2 FROM (SQRT(5)-1)

@ABHINAV JAIN

YOUR ANSWER IS ABSOLUTELY CORRECT TO SECOND PLACE OF DECIMAL.

BUT PLEASE TELL WHY ARE YOU SUBTRACTING 2 FROM (SQRT(5)-1)

THNX

yaar ans ke bina kar

attempt kar main fir batadunga

NO THE ROPE IS NOT AT ALL FIXED. THE PULLEY IS FIXED

PLZ. SOLVE RATES ASSURED::::::

WHAT WILL BE THE SPEED WITH WHICH MASS   M WILL HIT THE BLOCK WHEN THE MASS m IS RELEASED..

STRING IS LIGHT. PULLEY IS FIXED.

do post your attempts as i only have the answer