Recent questions tagged q69

The no of moles of $KMnO_4$ that will be needed to react with one mole of sulphite ion in acidic solution

asked Oct 29, 2013 by sreemathi.v

1 answer

Observe the statement given below: Assertion (A): $f(x)=x e^{-x}$ has the maximum at $x=1$ Reason (R): $ f(1)=0$ and $f(1) <0$ which of following is correct ?

asked Oct 28, 2013 by meena.p

1 answer

Statement (S) : In Rabbit, caecum of large intestine is important for cellulose digestion. Reasons (R) : Large intestine secretes an enzyme known as cellulase to digest cellulose in rabbit.

asked Oct 18, 2013 by thanvigandhi_1

1 answer

The length of the sub tangent at (2,2) to the curve $x^5 =2y^4$ is :

asked Oct 18, 2013 by meena.p

1 answer

There is an error of $\pm 0.04\;cm$ in the measurement of the diameter of a sphere. When the radius is $10\;cm$, the percentage error in the volume of the sphere is :

asked Oct 10, 2013 by meena.p

1 answer

In a $\Delta$le ABC let $\angle C=\large\frac{\pi}{2}$ if $r$ is the radius and R is the circumference of the $\Delta$le ABC then $2(r+R)$ equals

asked Oct 10, 2013 by sreemathi.v

1 answer

Identify the tumour suppressor genes from the following :

asked Oct 6, 2013 by thanvigandhi_1

1 answer

The height of the cone of maximum volume inscribed in a sphere of radius R is :

asked Sep 27, 2013 by meena.p

1 answer

If the lines $3x+4y-14=0$ and $6x+8y+7=0$ are both tangents to a circle, then its radius is

asked Sep 23, 2013 by meena.p

1 answer

The relation between pressure $p$ and volume $v$ is given by $pv^{\large\frac{1}{4}}$=Constant. If the percentage decrease in volume is $\large\frac{1}{2}$, then the percentage increase in pressure is

asked Sep 17, 2013 by meena.p

1 answer

The radius of the earth $R_e$ and the acceleration due to gravity at its surface is g. The work required to rising a body of mass m to height h from the surface of the earth will be

asked Aug 23, 2013 by meena.p

1 answer

An object of mass m is lied to a string of length l and a variable horizontal force is applied on it which is initially zero and gradually increases until the string makes an angle $\theta$ with the vertical. Work done by the force F is

asked Aug 6, 2013 by meena.p

1 answer

A uniform thick string of length 5 m is resting on horizontal frictionless surface. If it is pulled by a horizontal force of 5N from one end, the tension in the string at 1 m from the force applied is

asked Jul 12, 2013 by meena.p

1 answer

A very broad elevator is going up vertically with a constant acceleration of $2 m/s^2$. At the instant when its velocity is $4m/s$ a ball is projeted from the floor of the lift with a speed of $4 m/s$ relative to the floor at an elevation of $30 ^{\circ}$. The time taken by the ball to return to the floor is $(g=10 m/s^2)$

asked Jul 1, 2013 by meena.p

1 answer

The area between the ellipse $\large\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}$=$1$ and its auxillary circle is

asked May 22, 2013 by poojasapani_1

1 answer

If $z_{n}=\cos\large\frac{n\pi}{3}$$+i\sin\large\frac{n\pi}{3} $ then $z_{1}z_{2} \dots\;z_{6}$is

asked May 12, 2013 by poojasapani_1

1 answer

Evaluate: $\int\limits _{-\pi/2} ^{\pi/2} \cos ^4x dx$

asked Feb 3, 2013 by meena.p

1 answer

Find the interval in[0,2\pi] in which the function $ \Large\frac{-4.\sin x+2x+x \cos x}{2+\cos x}$ is increasing or decreasing.

asked Jan 29, 2013 by meena.p

0 answers

The differential equation of the family of curves $y^2=4a(x+a)$ is

asked Jan 20, 2013 by sreemathi.v

1 answer

If A and B are two independent events with $P(A)=\Large \frac{3}{5}$ and $P(B)=\Large \frac{4}{9},$then $P(A\cap B)$ equals

asked Jan 10, 2013 by sreemathi.v

1 answer

Verify the Rolle's theorem for the function $f(x)=\sqrt {4-x^2}\;in\;[-2,2]$

asked Jan 2, 2013 by sreemathi.v

1 answer

Sum of two skew symmetric matrices is always ____________ matrix.

asked Dec 24, 2012 by sreemathi.v

1 answer

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