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Recent questions tagged q38
Questions
A DNA fragment of 204 A was separated by a scientist from the nuclear genome of the plant. What will be the ratio between the number of two and three hydrogen bonds formed in the components of this fragment if it contains 40% Adenine?
jeemain
eamcet
biology
2011
q38
asked
Oct 27, 2013
by
thanvigandhi_1
1
answer
The volume (in cubic units) of the tetrahedron with edges $\hat i+\hat j+\hat k, \hat i - \hat j+\hat k$ and $\hat i+2 \hat j-\hat k$ is
jeemain
eamcet
math
2007
q38
asked
Oct 25, 2013
by
meena.p
1
answer
In the first world war ,$1.1\times 10^8$kg of position gas were fired on the allied forces.If the gas is assumed to be phosgene,how many molecules of the gas correspond to the amount fired on allied forces.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q38
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
Among the following, which is water insoluble ?
jeemain
eamcet
chemistry
2007
q38
asked
Oct 24, 2013
by
meena.p
1
answer
In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is $2 \times 10^{-7}$ m and stopping potential is 2.5 V. The threshold frequency of the metal (in Hz) approximately (charge of electron $e=1.6 \times 10^{-19}C.$ Planck's constant $h= 6.6 \times 10^{34}\;J-s)$
jeemain
eamcet
physics
2007
q38
asked
Oct 23, 2013
by
meena.p
1
answer
If $\bar {a} = \bar i + \bar j+ \bar k, \bar b= \bar i- \bar j+ \bar k,\bar c= \bar i+ \bar j- \bar k$ and $\bar d= \bar i- \bar j- \bar k,$ then observe the following lists:
jeemain
eamcet
math
2008
q38
asked
Oct 17, 2013
by
meena.p
1
answer
Study the following and identify the wrong statement
jeemain
eamcet
biology
2012
q38
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
$\cot^{-1}\big(\sqrt{\cos\alpha}-\tan^{-1}(\sqrt{\cos\alpha}\big)=x$ then $\sin x=?$
jeemain
math
class12
ch2
inverse-trigonometric-functions
q38
inverse-trignometric-properties
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
The probability of choosing randomly a number c from the set {1,2,3,......,9} such that the quadratic equation $x^2+4x+c=0$ has real roots is :
jeemain
eamcet
math
2009
q38
asked
Oct 9, 2013
by
meena.p
1
answer
If $3\sin 2\theta=2\sin 3\theta$ and $0\;<\;\theta\;<\pi$ then value of $\sin\theta$ is
jeemain
math
class11
ch3
trigonometric-functions
q38
trignometric-identities
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
Siphon is a device to transfer liquid from a higher level to lower level. The condition of working of siphon is
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q38
easy
asked
Oct 7, 2013
by
meena.p
1
answer
Identify the wrong statement in relation to Funaria
jeemain
eamcet
biology
2013
q38
asked
Oct 4, 2013
by
thanvigandhi_1
1
answer
If $A_i (i =1,2,3..........,n)$ are $n$ independent events with $ P(A_i)=\large\frac{1}{1+i}$ for each i, then the probability that none of $A_i$ occurs is :
jeemain
eamcet
math
2010
q38
asked
Sep 27, 2013
by
meena.p
1
answer
The locus of the complex number z such that $arg \bigg (\large\frac{z-2}{z+2}\bigg)=\frac{\pi}{3}$ is :
jeemain
eamcet
math
2011
q38
asked
Sep 20, 2013
by
meena.p
1
answer
Two fair dice are rolled. The probability of the sum of digits on their faces to be greater that or equal to 10 is
jeemain
eamcet
math
2013
q38
asked
Sep 16, 2013
by
meena.p
1
answer
The magnetic quantum number $m$ for the outermost electron in the Na atom is .............. .
jeemain
eamcet
chemistry
1991
fitb
q38
asked
Sep 12, 2013
by
meena.p
2
answers
A light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and star is proportional to $R^{\large\frac{-5}{2}}$ then $T^2$ is proportional to
jeemain
physics
class11
unit6
gravitation
q38
medium
asked
Aug 21, 2013
by
meena.p
1
answer
Ice cube of size $100\;cm$ and area of base $(500 m \times 50 m)$ is floating in a tank partially filled with water. The change in gravitational potential energy, when ice melts completely (density of Ice is $900\;kg/m^3$)
jeemain
physics
class11
unit4
work-power-energy
q38
difficult
asked
Jul 19, 2013
by
meena.p
1
answer
With what acceleration 'a' should the box in the figure descend so that a body of mass M placed in it exerts a force $Mg/4$ on the base
jeemain
physics
class11
unit3
laws-of-motion
q38
medium
asked
Jul 9, 2013
by
meena.p
1
answer
The volume of a cube is $1.83 \;cm^3$. Find the volume of $25$ such identical cubes to correct number of significant figures.
jeemain
physics
class11
ch2
units-and-measurement
q38
easy
significant-figure
asked
Jun 18, 2013
by
meena.p
1
answer
In a semi circle of diameter $4$cm a rectangle is to be inscribed . The maximum area of the rectangle is
tnstate
class12
bookproblem
p233
objective
q38
modelpaper
mar-2006
asked
May 18, 2013
by
poojasapani_1
1
answer
The shortest distance of the point $(2 , 10 ,1 )$ from the plane $\overrightarrow{r}.(\overrightarrow{3i}-\overrightarrow{j}+\overrightarrow{4k})=2\sqrt{26}$ is
tnstate
class12
bookproblem
p267
objective
q38
modelpaper
mar-2007
mar-2008
jun-2009
oct-2009
asked
May 10, 2013
by
poojasapani_1
1
answer
If $\begin{bmatrix}xy & 4\\z+6 & x+y\end{bmatrix}=\begin{bmatrix}8 & w \\ 0 & 6\end{bmatrix}$ then find the value of x,y,z and w
cbse
class12
ch3
q38
p57
short-answer
exemplar
easy
sec-a
math
asked
Mar 7, 2013
by
sreemathi.v
1
answer
Two cards are drawn from a pack. Find the probability that number of aces are drawn. (Write probability distribution table)
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q38
p43
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int \frac{\sqrt {\tan x}}{\sin x \cos x}dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q38
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
Show that the semi vertical angle of a right circular cone of maximum volume and given slant height is $\tan^{-1}\sqrt 2$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q38
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ y=|\cos x|+|\sin x|,\;find\; \Large\frac{dy}{dx}\; \normalsize at\;x=\Large\frac{2\pi}{3}$
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q38
p14
medium
math
sec-b
asked
Jan 28, 2013
by
meena.p
1
answer
If x, y, z are positive and unequal show that the value of determinant $ \begin{vmatrix} x & y & z \\ y & z & x \\ z & x & y \end{vmatrix}$ is negative.
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q38
p9
math
sec-b
asked
Jan 24, 2013
by
meena.p
0
answers
The differential equation for $y=A\cos\alpha x+B\sin\alpha x,$where A and B are arbitrary constants is\begin{array}{1 1}(A)\;\frac{d^2y}{dx^2}+x^2y=0 & (B)\;\frac{d^2y}{dx^2}+\alpha^2y=0\\(C)\;\frac{d^2y}{dx^2}+y=0 & (D)\;\frac{d^2y}{dx^2}-y=0\end{array}
cbse
class12
ch9
sec-a
q38
p196
objective
exemplar
easy
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
The value of the expression ${\mid \overrightarrow{a}\times \overrightarrow{b}\mid}^2+(\overrightarrow{a}.\overrightarrow{b})^2$ is _________.
cbse
class12
ch10
q38
p219
exemplar
easy
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Evaluate the following: $\displaystyle\int\frac{2x-1}{(x-1)(x+2)(x-3)}dx$
cbse
class12
ch7
q38
p165
exemplar
sec-c
difficult
math
asked
Jan 14, 2013
by
sreemathi.v
1
answer
The equation of normal to the curve $3x^2-y^2=8$ which is parallel to the line x+3y=8 is\begin{array}{1 1}(A)\;3x-y=8 & (B)\;3x+y+8=0\\(C)\;x+3y-8=0 & (D)\;x+3y=0\end{array}
cbse
class12
ch6
q38
p139
objective
exemplar
medium
sec-a
math
asked
Jan 11, 2013
by
sreemathi.v
1
answer
A and B throw pair of dice alternately.A wins the game if he gets a total of 6 and B wins if she gets a total of 7.It A starts the game,find the probability of winning the game by A in third throw of the pair of dice.
cbse
class12
ch13
q38
p276
short-answer
exemplar
sec-a
easy
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
In a LPP if the objective function $Z=ax+by$ has the same maximum value on two corner points of the feasible region,then every point on the line segment joining these two points give the same ________ value.
cbse
class12
ch12
q38
p257
fitb
exemplar
sec-a
easy
math
asked
Jan 8, 2013
by
sreemathi.v
1
answer
The direction cosines of the vector $(2\hat i+2\hat j-\hat k)$ are ___________.
cbse
class12
ch11
q38
p239
fitb
exemplar
easy
sec-a
math
asked
Jan 4, 2013
by
sreemathi.v
1
answer
Differentiate the following w.r.t x:$\tan^{-1}\bigg(\sqrt{\large\frac{1-\cos x}{1+\cos x}}\bigg),$$\large\frac{-\pi}{4}<$$x<\large\frac{\pi}{4}$.
cbse
class12
ch5
q38
p110
short-answer
exemplar
sec-a
easy
math
asked
Dec 31, 2012
by
sreemathi.v
1
answer
If A is a matrix of order $3\times 3$,then | 3A |=_______________.
cbse
class12
ch4
sec-a
q38
p83
fitb
exemplar
easy
math
asked
Dec 27, 2012
by
sreemathi.v
1
answer
The principal value of $\cos^{-1}\bigg(-\Large {\frac{1}{2}}\normalsize \bigg)$ is_____________.
cbse
class12
ch2
q38
p39
fitb
exemplar
easy
sec-a
math
asked
Dec 21, 2012
by
sreemathi.v
1
answer
Let $f:R\rightarrow R $ be defined by $f(x)=3x^2-5\; and \;g:R\rightarrow R \;by \;g(x)=\Large {\frac{x}{x^2+1}}$.Then g o f is
cbse
class12
ch1
q38
p15
objective
exemplar
sec-a
math
asked
Dec 19, 2012
by
sreemathi.v
1
answer
Choose the correct answer in $\Large \int \normalsize \frac{10x^9+10^xlog_{e^{10}}dx}{x^{10}+{10}^x}$ equals
cbse
class12
bookproblem
ch7
sec2
q38
p305
easy
sec-a
math
asked
Dec 5, 2012
by
sreemathi.v
1
answer
Prove the following\[\int\limits_0^\frac{\pi}{4}2\tan^3x\;dx=1-log2\]
cbse
class12
bookproblem
ch7
misc
q38
p353
sec-b
medium
math
asked
Dec 2, 2012
by
sreemathi.v
1
answer
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