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Recent questions tagged q36
Questions
The ratio in which $\hat i+2 \hat j+5 \hat k$ divides the join of $-2\hat i+3 \hat j+5 \hat k$ and $7 \hat i - \hat k$ is
jeemain
eamcet
math
2007
q36
asked
Oct 25, 2013
by
meena.p
1
answer
Chlorophyll,a green coloring matter contains 2.68% mg.The number of atoms of mg present 1g chlorophyll are
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q36
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
Which of the following is not a peroxy acid?
jeemain
eamcet
chemistry
2007
q36
asked
Oct 24, 2013
by
meena.p
1
answer
an electron beam travels with a velocity of $1.6 \times 10^{7}\;ms^{-1}$ perpendicularly to magnetic field of intensity 0.1 T. The radius of the path of electron beam $(m_e=9 \times 10^{-31}kg)$
jeemain
eamcet
physics
2007
q36
asked
Oct 23, 2013
by
meena.p
1
answer
If the points with position vectors $60 \bar i+ 3 \bar j, 40 \bar i-80 \bar j$ and $a \bar i-52 \bar j$ are collinear, then $a = $
jeemain
eamcet
math
2008
q36
asked
Oct 17, 2013
by
meena.p
1
answer
Which one of the following parts is different from others with reference to ploidy number in Cycas?
jeemain
eamcet
biology
2012
q36
asked
Oct 16, 2013
by
thanvigandhi_1
1
answer
Find $\cos\tan^{-1}\sin\cot^{-1}x$
jeemain
math
class12
ch2
inverse-trigonometric-functions
q36
inverse-trignometric-properties
medium
asked
Oct 16, 2013
by
sreemathi.v
1
answer
The volume of the tetrahedron having the edges $\overrightarrow {i}+2 \overrightarrow {j}-\overrightarrow {k},\overrightarrow {i}+\overrightarrow {j}+ \overrightarrow {k},\overrightarrow {i}+\overrightarrow {j}+ \lambda \overrightarrow {k}$ as coterminous, is $\large\frac{2}{3} $ cubic units. Then $\lambda=$
jeemain
eamcet
math
2009
q36
asked
Oct 9, 2013
by
meena.p
1
answer
The numerical value of $\tan\large\frac{\pi}{3}$$+2\tan\large\frac{2\pi}{3}$$+4\tan\large\frac{4\pi}{3}$$+8\tan\large\frac{8\pi}{3}$ is equal to
jeemain
math
class11
ch3
trigonometric-functions
q36
trignometric-identities
easy
asked
Oct 8, 2013
by
sreemathi.v
1
answer
In the arrangement shown in figure $\large\frac{m_A}{m_B}=\frac{2}{3}$ and ratio of density of block B and of the liquid is $2:1$ The system is released from resat. Then
jeemain
physics
class11
unit7
properties-of-solids-and-fluids
q36
difficult
asked
Oct 7, 2013
by
meena.p
1
answer
Assertion (A) : Dictyostele is present in rhizome of pteris vittata. Reason (R) : Meristeles are scattered in rhizome of pteris vittata.
jeemain
eamcet
biology
2013
q36
asked
Oct 4, 2013
by
thanvigandhi_1
1
answer
Let $ OA,OB,OC$ be the co-terminal edges of a rectangular parallelopiped of volume V and let P be the vertex opposite to O. Then $[\overrightarrow{AP} \overrightarrow {BP} \overrightarrow {CP} ]=$
jeemain
eamcet
math
2010
q36
asked
Sep 26, 2013
by
meena.p
1
answer
$\begin{vmatrix} 24 & 25 & 26\\ 25 & 26 & 27 \\ 26 & 27 & 27\end{vmatrix}=$
jeemain
eamcet
math
2011
q36
asked
Sep 20, 2013
by
meena.p
1
answer
If $\overrightarrow {a}$ and $\overrightarrow {b}$ are two non-zero perpendicular vectors, then a vector $\overrightarrow {y}$ satisfying equations $\overrightarrow {a}.\overrightarrow {y}=c$ (c scalar) and $\overrightarrow {a} \times \overrightarrow {y} = \overrightarrow {b}$ is
jeemain
eamcet
math
2013
q36
asked
Sep 16, 2013
by
meena.p
1
answer
The number of $\sigma $ bonds in the ethylene molecule is ............... .
jeemain
eamcet
chemistry
1991
fitb
q36
asked
Sep 12, 2013
by
meena.p
0
answers
A spaceship is lanunched into a circular orbit close to the earth's surface. What additional velocity has now to be imparted to the space ship in the orbit to overcome the gravitational pull. (Radius of earth$= 6400 km,g=9.8 m/s^2$)
jeemain
physics
class11
unit6
gravitation
q36
medium
asked
Aug 20, 2013
by
meena.p
1
answer
A particle of mass m is projected with velocity u at an angle $\alpha$ with horizontal. During the period when particle decends from highest point to the position where its velocity vector makes $\alpha/2$ angle with horizontal, work done by gravity force is
jeemain
physics
class11
unit4
work-power-energy
q36
difficult
asked
Jul 19, 2013
by
meena.p
1
answer
Inside a horizontally moving box, a man finds that when an object is placed on a horizontal smooth table and released; it moves with an acceleration $10 m/s^2$ In this box if 1 kg body is suspended with a light string, the tension in the string in equilibrium position $(g=10 m/s^2)$
jeemain
physics
class11
unit3
laws-of-motion
q36
easy
asked
Jul 9, 2013
by
meena.p
1
answer
If pressure $P$, velocity $V$ and $T$ are taken as fundamental physical quantities the dimensional formula of force is
jeemain
physics
class11
ch2
units-and-measurement
q36
easy
dimensional-formulae-and-analysis
asked
Jun 18, 2013
by
meena.p
1
answer
The function $f(x)=x^{2}$ is decreasing in
tnstate
class12
bookproblem
p232
objective
q36
modelpaper
jun-2009
asked
May 18, 2013
by
poojasapani_1
1
answer
If$[\overrightarrow{a} + \overrightarrow{b},\overrightarrow{b}+\overrightarrow{c},\overrightarrow{c} + \overrightarrow{a}]=8$ then $[\overrightarrow{a},\overrightarrow{b},\overrightarrow{c}]$ is
tnstate
class12
bookproblem
p267
objective
q36
modelpaper
jun-2007
mar-2010
asked
May 10, 2013
by
poojasapani_1
1
answer
A man takes a step forward with probability 0.4 and backwards with a probability 0.6. Find the probability that after 11 steps he is just one step away from the starting point.
cbse
class12
additionalproblem
kvquestionbank2012
ch13
q36
p43
math
asked
Feb 5, 2013
by
meena.p
0
answers
Evaluate:\[\int \frac{\sin 2x}{a^2\cos^2x+b^2\sin^2x}dx\]
cbse
class12
additionalproblem
kvquestionbank2012
ch7
q36
p26
math
asked
Feb 2, 2013
by
meena.p
0
answers
Prove that the curves $ y^2=4ax\;and\;xy=c^2$ cut at right angles if $ c^4=32a^4$
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q36
p18
math
asked
Jan 29, 2013
by
meena.p
0
answers
If $ \sqrt { 1-x^2} +\sqrt {1-y^2}=a(x-y),\;prove\;that\;\Large\frac{dy}{dx}=\sqrt{\frac{1-y^2}{1-x^2}}$
cbse
class12
additionalproblem
kvquestionbank2012
ch5
q36
p14
difficult
math
sec-b
asked
Jan 25, 2013
by
meena.p
1
answer
If $A=\begin{bmatrix} \cos \theta & i\sin \theta \\ i\sin \theta & \cos \theta \end{bmatrix}$ then prove by Mathematical Induction that :$A^n=\begin{bmatrix} \cos n\theta & i\sin n\theta \\ i\sin n\theta & \cos n\theta \end{bmatrix}$
cbse
class12
additionalproblem
kvquestionbank2012
ch3
q36
p9
math
sec-c
asked
Jan 24, 2013
by
meena.p
0
answers
The order and degree of the differential equation $\large\frac{d^2y}{dx^2}+\bigg(\frac{dy}{dx}\bigg)^{\frac{1}{4}}+x^{\frac{1}{5}}=0$,respectively,are\[(A)\;2\;and\;not\;defined\quad(B)\;2\;and\;2\quad(C)\;2\;and\;3\quad(D)\;3\;and\;3\]
cbse
class12
ch9
sec-a
q36
p195
objective
exemplar
easy
math
asked
Jan 18, 2013
by
sreemathi.v
1
answer
The vectors $\overrightarrow{a}=3\hat i+2\hat j+2\hat k$ and $\overrightarrow{b}=-\hat i+2\hat k$ are the adjacent sides of a parallelogram .The acute angle between its diagonals is__________.
cbse
class12
ch10
q36
p219
fitb
exemplar
medium
sec-a
math
asked
Jan 17, 2013
by
sreemathi.v
1
answer
Evaluate the following:$\displaystyle\int\frac{x^2dx}{(x^2+a^2)(x^2+b^2)}$
cbse
class12
ch7
q36
p165
exemplar
sec-c
difficult
math
asked
Jan 14, 2013
by
sreemathi.v
1
answer
A ladder, 5 meter long,standing on a horizontal floor,leans against a vertical wall.If the top of the ladder slides downwards at the rate of 10cm/sec,then the rate at which the angle between the floor and the ladder is decreasing when lower end of ladder is 2 meters from the wall measure in "radian/seconds" is?
cbse
class12
ch6
q36
p138
objective
exemplar
medium
sec-a
math
asked
Jan 11, 2013
by
sreemathi.v
1
answer
The random variable X can take only the values 0,1,2.Given that P(x=0)=P(X=1)=P and that E($X^2$)=E[X],find the value of p.
cbse
class12
ch13
q36
p275
short-answer
exemplar
sec-a
easy
math
asked
Jan 9, 2013
by
sreemathi.v
1
answer
In a LPP,the objective function is always ______________.
cbse
class12
ch12
q36
p257
fitb
exemplar
sec-a
easy
math
asked
Jan 8, 2013
by
sreemathi.v
1
answer
The plane 2x-3y+6z-11=0 makes an angle $\sin^{-1}(\alpha)$ with x-axis.The value of $\alpha$ is equal to
cbse
class12
ch11
q36
p238
objective
exemplar
medium
sec-a
math
asked
Jan 4, 2013
by
sreemathi.v
1
answer
Differentiate the following w.r.t $x$: $(x+1)^2(x+2)^3(x+3)^4$.
cbse
class12
ch5
q36
p109
short-answer
exemplar
sec-b
medium
math
asked
Dec 31, 2012
by
sreemathi.v
1
answer
The value of the determinant $\begin{vmatrix}x & x+y & x+2y\\x+2y & x & x+y\\x+y & x+2y & x\end{vmatrix}$ is
cbse
class12
ch4
sec-a
q36
p82
objective
exemplar
medium
math
asked
Dec 27, 2012
by
sreemathi.v
1
answer
Prove by Mathematical Induction that $(A')^n=(A^n)'$,where $n\in N$ for any square matrix A.
cbse
class12
ch3
q36
p57
short-answer
exemplar
sec-b
medium
math
asked
Dec 23, 2012
by
sreemathi.v
1
answer
Let a pair of dice be thrown and the random variable X be the sum of the numbers that appear on the two dice. Find the mean or expectation of X.
cbse
class12
modelpaper
2012
sec-c
q36
math
asked
Dec 21, 2012
by
balaji.thirumalai
0
answers
A doctor is to visit a patient. From the past experience, it is known that the probabilities that he will come by train, bus, scooter or by any other means of transport are respectively \(\frac{3}{10}, \frac{1}{5}, \frac{1}{10} \) and \( \frac{2}{5} \) . The probabilities that he will be late are \( \frac{1}{4}, \frac{1}{3} \) and \( \frac{1}{12} \) if he comes by train, bus and scooter respectively, but if he comes by other means of transport, then he will not be late. When he arrives, he is late. What is the probability that he comes by train.
cbse
class12
modelpaper
2012
sec-c
q36
math
asked
Dec 21, 2012
by
thanvigandhi_1
1
answer
The number of real solutions of the equation$\sqrt{1+\cos2x}=\sqrt 2\cos^{-1}(\cos x)\;in\begin{bmatrix}\frac{\Large \pi}{2},\pi\end{bmatrix}$
cbse
class12
ch2
q36
p39
objective
exemplar
easy
sec-b
math
asked
Dec 21, 2012
by
sreemathi.v
1
answer
Let A={1,2,3,....n} and B={a,b}. Then the number of surjection from A into B is \begin{array}{1 1}(A)\quad"p_2 \qquad & (B)\quad 2"-2\\ (C)\quad 2^n-1 \qquad & (D)\quad none\;of\;these\end{array}
cbse
class12
ch1
q36
p14
objective
exemplar
sec-a
math
asked
Dec 19, 2012
by
sreemathi.v
1
answer
Integrate the function $\frac{(x+1)(x+log\: x)^2}{x}$
cbse
class12
bookproblem
ch7
sec2
q36
p305
sec-a
easy
math
asked
Dec 5, 2012
by
sreemathi.v
1
answer
Prove the following\[\int\limits_{-1}^1x^{17}\cos^4x\;dx=0\]
cbse
class12
bookproblem
ch7
misc
q36
p353
sec-a
easy
math
asked
Dec 2, 2012
by
sreemathi.v
1
answer
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