Recent questions tagged q63

The hydronium ion concentration in pure water is $1 \times 10^{-7}$ mol$L^{-1}$. The degree of dissociation of water is

asked Nov 27, 2013 by mosymeow_1

1 answer

The frog the sclerotic layer is formed from :

asked Nov 26, 2013 by thanvigandhi_1

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Arrange the correct sequence of enzymes which act on food in different regions of alimentary canal :

asked Nov 14, 2013 by thanvigandhi_1

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If $R \to R$ is an even function which is twice differentiable on R and $f''(\pi)=1,$ then $f''(-\pi)$ is equal to :

asked Nov 13, 2013 by meena.p

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$\lim \limits_{x \to \infty} [ \sqrt {x^2+2x-1}-x]$ is equal to :

asked Nov 6, 2013 by meena.p

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In which of the following characters Prototherians resemble Metatherians?

asked Oct 30, 2013 by thanvigandhi_1

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If molecular weight of glucose-1-phosphate is 260 and its density is 1.5g $cm^{-3}$ ,what is the average volume occupied by 1 molecule of this compound ?

asked Oct 28, 2013 by sreemathi.v

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If $2x^2-3xy+y^2+x+2y-8=0$, then $\large\frac{dy}{dx}$ is equal to

asked Oct 26, 2013 by meena.p

1 answer

The class of Mollusca with closed type of blood vascular system is

asked Oct 17, 2013 by thanvigandhi_1

1 answer

If $f(2)=4$ and $f'(2)=1$, then $\lim \limits_{x \to 2} \large\frac{x f(2) -2 f(x)}{x-2}=$

asked Oct 17, 2013 by meena.p

1 answer

$\lim \limits _{x \to \infty} \bigg(\large\frac{x+5}{x+2}\bigg)^{x+3}=$

asked Oct 10, 2013 by meena.p

1 answer

If $\large\frac{x}{\cos\theta}=\frac{y}{\cos(\theta+\large\frac{2\pi}{3})}=\frac{z}{\cos(\theta-\large\frac{2\pi}{3})}$ then $x+y+z$ is equal to

asked Oct 10, 2013 by sreemathi.v

1 answer

Identify the correct sequence of events with reference to Conjugation of Vorticella

asked Oct 6, 2013 by thanvigandhi_1

1 answer

$\lim \limits_{x \to x} \large\frac{\tan x -\sin x}{x^2}=$

asked Sep 27, 2013 by meena.p

1 answer

The line joining the points $A(2,0)$ and $B(3,1)$ is rotated through an angle of $45^{\circ}$, about A in the anticlockwise direction. The coordinates of B in the new position

asked Sep 23, 2013 by meena.p

1 answer

Let $f$ be a non-zero real valued continuous function satisfying $f(x+y)=f(x).f(y)$ for all $x,y \in R.$ If $f(2)=9,$ then $f(6)=$

asked Sep 16, 2013 by meena.p

1 answer

The ratio of radius of two planets is K and ratio of acceleration due to gravity of both planet is G. What will be the ratio of their escape velocity ?

asked Aug 23, 2013 by meena.p

1 answer

A $1.0 \;kg$ block collides with a horizontal weightless spring of spring constant $2.0N/m$. The block compresses the spring $4.0\;m$ from the rest position.Assuming that the coefficient of kinetic friction between the block and horizontal surface of $0.25,$ what was the speed of the block at the instant of collision

asked Aug 6, 2013 by meena.p

1 answer

A machine gun of mass 10 kg fires 30 gm bullet at the rate of 6 bullets per second with a speed of $400 ms^{-1}$ .The force required to hold the gun is

asked Jul 11, 2013 by meena.p

1 answer

A ball $B_1$ is projected from A at a velocity u making an angle $30 ^{\circ}$with the horizontal. Another ball $B_2$ is simultaneously projected from C verically up and with velocity v.Both collide each other at their maximum heights. What is ratio $\large\frac{u}{v}$

asked Jun 28, 2013 by meena.p

1 answer

The value of $\int\limits_{-\pi/2}^{\pi/2}\large\left(\frac{\sin x}{2+\cos x}\right)$$dx$ is

asked May 21, 2013 by poojasapani_1

1 answer

If $z$ represents a complex number then arg $(z)+arg(\overline{z})$ is

asked May 12, 2013 by poojasapani_1

1 answer

Gas is escaping from a spherical balloon at the rate of $900 cm^3$/sec. How fast is the surface area, radius of the balloon shrinking when the radius of the balloon is 30cm?

asked Jan 29, 2013 by meena.p

0 answers

The general solution of the differential equation $\large\frac{dy}{dx} $$=e^{\large\frac{x^2}{2}}+xy$ is :\[(A)\;y=ce^{\large\frac{x^2}{2}} \quad (B)\;y=-ce^{\large\frac{x^2}{2}} \quad (C)\;y=(x+c)e^{\large\frac{x^2}{2}} \quad (D)\;y=(c-x)e^{\large\frac{x^2}{2}}\]

asked Jan 19, 2013 by sreemathi.v

1 answer

The value of $\large\int\limits_{-\pi}^\pi$$\sin^3x\cos^2x dx$ is___________.

asked Jan 15, 2013 by sreemathi.v

1 answer

The function $f(x)=\Large\frac{2x^2-1}{x^4}$,x>0,decreases in the interval__________.

asked Jan 12, 2013 by sreemathi.v

1 answer

If $\sqrt {1-x^2}+\sqrt {1-y^2}=a(x-y),$prove that $\large \frac{dy}{dx}=\frac{\sqrt{1-y^2}}{\sqrt{1-x^2}}$.

asked Jan 2, 2013 by sreemathi.v

1 answer

If A and B are matrices of same order ,then (AB'-BA') is a

asked Dec 24, 2012 by sreemathi.v

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