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r represents the pos vector of a particle and ω and a are non zero contants (contant mag includes a zero mag) A)r=cos(ωt)i +sin(ωt)j + (at)k B)r=5cos(ωt)i +5sin(ωt)j C)r=(5at2)i +(2at)j D)r=5[cos(ωt2)i +sin(ωt2)j] p)co ...

Let there be a quotient of 2 natural nos in which the denominator is 1 less than the square of the numerator. If we add 2 to both numerator and denominator,the quotient will excess 2/3. If we subtract 3 from both numerator an ...

Which doesnt have coordinate bond? BF4- HF2- ...

If the error in measuring momentum is +100%,then the error in measurement of kinetic energy is : a>400% b>300% c>100% d>200% ...

Draw the graph of {y} = [sin x] fractional part of y equal to greatest integer of sin x ...

Draw the graph of [y] = [sin x] ...

1) Equal volume of two solution having pH = 2 and pH = 10 are mixed together at 90° C. Then pH of resulting solution is: (Take Kw at 90°C = 10-12 ) [a] 2 + log 2 [B] 10 - log 2 [c] 7 [d] 6 2) The ionazation constant of benz ...

Draw the graph of y=[[sin x]]+[[cos x]] There are nested greatest integers [1] ...

17 ants are roaming over the chess board of the area 8 X 8 (I.e is 64 square inches) then atleast two of them must always be closer than (a) 2 inches (b) 2 √2 inches (c) √2 inches (d) none of these ...

1. Find the number of solutions of the equation x+y+z=6 the answere is 28 Please explain this in detail 2. From 5 apples, 4 mangoes and 3 bananas, in how many ways can we select atleast two fruits of each variety if i) fruits ...

\begin{Bmatrix} x+y=2\lambda & \\ x+\lambd^2y=\mu & \end{Bmatrix} system has infinite solns and the position vectors of two points A and B are given as (1,λ,2μ),(1,μ,λ2) respectively.AB is line segment divided by XY plane ...

A : If P(x) is a polynomial of even degree with positive leading coefficient and P(x)-P''(x)≥0 for all xεR then P(x)≥0for all xεR R :lim P(x)= lim P(x)=+∞ x→∞ x→-∞ and min {P(x)} is finite number and at local ...

Some of the university lecturers here were interested in the question: Is it possible to divide a given square into n squares for any n≥6? (Obviously all squares neednt be the same size) ...

Well, here are some brainy problems you might want to have a look at only if you are not feeling too sleepy --- :) I am gonna post the solutions after one hour if I can --- 1> If y = x/x2+1 , then find x if d4/dx4 (y) = -3 ...

I think the following questions require good amount of thinking,but even after such a short stint with targetiit, i realized one thing and that is, no man made problem can escape from the axe of problem solving here :) [I hop ...

potassium cyanide react with R----X to give alkyl cyanide while silver cyanide forms an isocyanide as a major product?? ...

a,b,c be e R+ and form an AP and abc=4 find the minimum value of b ...

while solving this sum: find C0+C1/2 +C2 /3 +.............+Cn/n+1 there is an alternate method given in BT that is multiply and divide by( n+1) \frac{1}{n+1}[(n+1)(1+\frac{n}{2} + \frac{n(n-1)}{1.2.3}+...........] then the ex ...

ex=x2+1 Solve this one rigorously. I dont want any short cuts or half attempts. Ideally this could fit into Graph of the day section.. But I thought that this is not a bad place either. ...

well pls suggest sum gud book (other than o.p.tandon and maity ganguly) for inorganic.im horrible at it- 1)white ZnO on heating looses oxygen and becomes yellow due to defects in solid structure.no of defects increases or dec ...

1. Which element is the member oh 'hydride gap' ?? A. Zn B. Sc C. Fe D. Cr 2. Chlorosis is due to presence at A. Sulphur B. SO2 C. N2 D. O3 ...

The intensity of gamma radiation from a given source is I. On passing through 36 mm of lead, it is reduced to I/8. The thickness of lead which will reduce the intensity to I/2 will be ? ...

At least two of the nonnegative real numbers $ a_{1},a_{2},...,a_{n} $ are nonzero. Decide whether a or b is larger if $ a=\sqrt[2002]{a_{1}^{2002}+a_{2}^{2002}+\ldots+a_{n}^{2002}} $ and $ b=\sqrt[2003]{a_{1}^{2003}+a_{2}^{2 ...

A small object loops a vertical loop in which a symmetrical section of angle 2a has been removed. Find the maximum and minimum heights from which the object, after loosing contact with the loop at point A and flying through t ...

\int \frac{t(1-t^{2})^{-7/4}}{\sqrt{t+2\sqrt{1-t^{2}}+\sqrt{t+3\sqrt{1-t^{2}}}}}dt ...

sum 1 tel me...................... Sum of d factors of 10! which are odd and are of d form "3m+2", m belongs to N ...

y= sin πx + sin π{x} where {} denotes fractional part of x ...

*Image* Doubt is that must E always be greater than vBl Although it has mentioned v is small, but B and l may be large enuf to be greater than E, So the answers will differ. IS my logic correct? ...

If α,β and γ are the real roots of the equation x3 – 3px2 + 3qx – 1 = 0, then the centroid of the triangle with vertices (α,1/α) , (β,1/β) and (γ,1/γ) is: I guess one of the easier QOD's ...

cos 2φ/ sin 3φ < 0, if φ lies in: (a) {(13π/48),(14π/48)} (b) {(14π/48),(18π/48)} (c) {(18π/48),(23π/48)} (d) {(π/2),π} ...