-
A person throws a bottle into a dustbin at the same height as he is 2m away at an angle of 45°. The velocity of the bottle thrown is: Q 1. g 2. √g 3. 2g 4.√2g g comes inside the root in respective cases. ...
-
In paper 1, chemistry section, there was one question on aromaticity. We were asked to select UNSTABLE molecules from the ones given at room temperature (Multiple correct). Why can't option A) (1,3-cyclohexadiene) also be the ...
-
The molal lowering of vapour pressure of a liquid is 1.008 mm Hg at 25oC in a very dilute solution containing non volatile solute.The vapour pressure of the liquid at 25oC is 'A'x10 mm Hg.The value of 'A' is...... [ Integer t ...
-
The molal lowering of vapour pressure of a liquid is 1.008 mm Hg at 25oC in a very dilute solution containing non volatile solute.The vapour pressure of the liquid at 25oC is 'A'x10 mm Hg.The value of 'A' is...... [ Integer t ...
-
Evaluate the following integral: ∫ √cos2x/sinx dx Plz show me the steps also. ...
-
1) A radioactive nuclide can decay simultaneously by two different processes which have deacy constants λ1 and λ2 . The effective decay constant of the nuclide is λ. a) λ=λ1 + λ2 b)λ= 1/2 (λ1 + λ2) c) 1/λ = 1/λ1 + ...
-
1) What is the smallest distance between the point(-2,-2) and a point on the circumference of the circle given by (x - 1)2 + (y - 2)2 = 4? A) 3 B) 4 C) 5 D) 6 E) 7 2)Find a negative value of k so that the graph of y = x2 - 2x ...
-
Integrate: 1) ∫ 1/sinx+sec x dx Please show me the steps also. ...
-
A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m / s, at right angles to the horizontal component of the earth’s magnetic field, 0.30 × 10−4 Wb / m2. (a) What is the direc ...
-
1) If c be a positive constant and | f(y) - f(x)| ≤ c(y-x)2, then for all real x and y,then a)f(x)=0 for all x b)f(x)=x for all x c)f '(x)=0 for all x d)f '(x)=c for all x 2) If P(x) = x(x+1)(x+2)........(x+2004),then for p ...
-
The potential energy of a 1 kg particle free to move along X-axis is given by U(x)=( x4/4 - x2/2 ) J.The total mechanical energy of the particle is 2 J. Then the maximum speed (in m/s) is p/√q . Find out p + q. I got 2 answ ...
-
A solid sphere of radius R is charged uniformly.At what distance from its surface is the electrostatic potential half of the potential at the centre? 1) R 2) R/2 3) R/3 4) 2R I know the final answer.But how to solve this one? ...
-
Q. A particle of mass m having negative charge q moves along an ellipse around a fixed positive charge Q so that its maximum and minimum distances from fixed charge are equal to r1 and r2 respectively.Calculate the angular mo ...
-
Write the structural formula of the product formed when 1)Bromoethane reacts with one-half of the molar quantity of silver 2)Chloral is heated with aqueous sodium hydroxide. ...
-
Six charges 3 positive charges and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at O is double the electric field when only one positive charge of same m ...
-
If a charge q is placed at the centre of line joining two equal like charges Q,the system will be in equilibrium if q is a) -Q/2 b) -Q/4 c) +Q/2 d) +4Q Plz explain yur ans ...... ...
-
Given 2 real numbers x and y such that 0 ≤ x,y ≤ 2,find the probability that x2 + y2 ≤ 1. ...
-
Using principle of mathematical induction, prove that n5/5 + n3/3 + 7n/15 is a natural number for all n belonging to N. ...
-
6 students line up daily in the morning for boarding a bus to school.Suppose that this process is not broken and the school works for 180 days in a year.After how much time the same arrangement can follow? ...
-
If a,b,c are in GP and x,y are the arithmetic means of a,b and b,c respectively,prove that 1) a/x + c/y = 2. 2) 1/x + 1/y = 2/b . ...
-
Out of 21 tickets marked with numbers 1 to 21,three are drawn at random.Find the probability that the numbers are in A.P. Plz explain this prob also... ...
-
Diffrenciate |x| w.r.t x using first principle. ...
-
Prove that 1)Limx--->0 loge(1+x)/x = 1. 2)Limx-->0 ax-1/x = logea, a>0,a≠0. In the second one,its 'a' to the power 'x' minus 1 divided by 'x' to give log 'a' to the base 'e'. ...
-
Hello, Plz tell me what are the important topics in chemistry for iit jee.I am in 11th class and I am not very happy with my preparation in chemistry.Now,I feel that i should just concentrate on the important and scoring topi ...
-
Hello, I am very curious to know why 'torque' is only the cross product of force and perpendicular distance.I just want to know the mathematical derivation for this equation.In physics,nothing can be just defined;there has to ...
-
Find the equation of the line passing through the point (2,3) and making an intercept of length 3 units between the lines y+2x=2 and y+2x=5. Plz show with steps... ...
-
A is the point (4,0) and M is the foot of the perpendicular drawn from a point to the y-axis.If P moves such that the distances PA and PM are equal find the locus of P. I get the answer as 8x=16+y2. Am I right? If not,plz sho ...
-
The line joining A = ( b cosα,b sinα ) and B = ( acosβ,asinβ ) is produced to a point M(x,y) so that AM:BM = b:a. Prove that x+y tan( α+β/2 ) = 0. ...
-
Hello all, I am extremely interested in taking FREE online test series for iit-jee.Its just that I want to test myself.I know that even targetiit.com offers it too, but I would like to know the list of other websites which of ...
-
If a1 and a2 are 2 non-collinear unit vectors and if |a1 + a2| =√3, then the value of(a1 -a2).(2a1 +a2) is: a)2 b) 3/2 c) 1/2 d)1 Plz show with steps as i dont know how to start.. ...
