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A body revolves with constant speed v in a circular path of radius r. The magnitude of itd average acceleration during motion between two points in diametrically opposite direction is
student-questions
physics
asked
Sep 24, 2019
by
meena.clay6
1
answer
Four particles A,B,C and D are moving with constant speed v each. At the instant shown relative velocity of A with respect to B,C and D are in direction .
student-questions
physics
asked
Sep 23, 2019
by
meena.clay6
1
answer
if $\large\frac{x}{y}=\frac{2}{5}$ then find the value of $\large\frac{(x^2+y^2)}{xy}$
student-questions
physics
asked
Sep 23, 2019
by
meena.clay6
1
answer
The number of P-P-P angle in $ P_4$ structure is :
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
The vapour pressure of two miscible liquids(A) and (B) are 300 and 500 mm of Hg are respectively . In a aflask 10 mole of (A) is mixed with 12 moles of (B) . How ever as soon as (B) is added . (A) starts polymerising into a completely insoluble solid . The polymerision follows first order kinetics. After 100 minutes ,0.525 moles of a solute is dissolved which areas the polymerization completely . The final vapour pressure of the solution is 400 mm of Hg. Estimate the rate constant of the polymerisation reaction . Assume negligible volume change on miximg and polymerisation ,and ideal behavior for the final solution
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
Why halides of oxygen are not very stable?
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
Why sulphur oxides are highly stable? And why Sulphur forms many oxides?
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
How many optical Isomers possible for following structure of coordination compounds $(a)Ma_2b_2c_2 (b) Ma_2b_2c_2$
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
Hydrogen exists as 3 isotopes -H,D,T and oxygen exists as 2 isotopes $^{16}O,^{18}$. How many radioactive water molecules are possible ?
student-questions
chemistry
asked
Sep 23, 2019
by
meena.clay6
1
answer
$2 \times (g) \to 3y(g) +2z(y)$ Calculate : (a) Order of reaction (b) Rate constant (c) Time taken for 75% completion of reaction (d) Total pressure when $P_x=700\;mm\;Hg$
student-questions
chemistry
asked
Sep 16, 2019
by
meena.clay6
1
answer
$124\;g$ of mix containing $NaHCO_3,AlCl_3,KNO_3$ requires 500 ml,8% w/w $NaOH$ soln. $[ dNaOH =1.8 gm/ml]$ for complete neutralisation . On heating same amt of mix , it shows loss in weight of 18.6 gm. Calculate % composition of mixture by moles.Weak base formed does not interfere in reaction. Assume $KNO_2$ doesn't decompose under given conditions
student-questions
chemistry
asked
Sep 16, 2019
by
meena.clay6
1
answer
What is difference between fertilisation and syngamy?
student-questions
biology
asked
Sep 16, 2019
by
meena.clay6
1
answer
Birds represent "class". How?
student-questions
biology
asked
Sep 16, 2019
by
meena.clay6
1
answer
Three pairs of jointed legs means?
student-questions
biology
asked
Sep 16, 2019
by
meena.clay6
1
answer
An atom of an element contains 29 electrons and 35 neutrons . Deduce (i) the number of protons and (ii) the electronic configuration of the element (iii)identify the element
student-questions
chemistry
asked
Sep 16, 2019
by
meena.clay6
1
answer
(i)Calculate the number of electrons which will together weigh one gram (ii) Calculate the mass and charge of one mole of electrons
student-questions
chemistry
asked
Sep 16, 2019
by
meena.clay6
1
answer
I bought some oranges at the rate of 4 for Rs 1. I kept 1/5 with my self and sold remaining at the rate of 3 for Rs 1 and earn profit of Rs 1.find the no of oranges I bought?
student-questions
math
asked
Sep 16, 2019
by
meena.clay6
1
answer
Choose the correct option w.r.t bones involved in synovial joints
student-questions
biology
asked
Sep 16, 2019
by
meena.clay6
1
answer
The molal lowering of vapour pressure for water at $373^{\circ}\;K$ will be:
student-questions
chemistry
asked
Sep 13, 2019
by
meena.clay6
1
answer
The value of $2 \cos 6A-2 \cos 2A-1$ is equal to
student-questions
math
asked
Aug 14, 2019
by
meena.clay6
1
answer
If $0.75\;g$ of an organic compound in Kjeldah's method neutralized of nitrogen in the compound is
student-questions
chemistry
asked
Aug 14, 2019
by
meena.clay6
1
answer
$X= 2+2^{\frac{1}{3}}+2^{\frac{2}{3}}$ , find the value of $x^3-6x^2+6x-2$
student-questions
math
asked
Aug 14, 2019
by
meena.clay6
1
answer
In Rutherford scattering experiment, an $\alpha$ particle is projected with $KE=4MeV$ , maximum distance up to which this $\alpha$ particle can reach to the nucleus of Cu nucleus : (atomic number of Cu= 29)
student-questions
physics
asked
Aug 13, 2019
by
meena.clay6
1
answer
Solve : $\displaystyle\lim_{x \to 0} \frac{x^3-2x^2+4x-3}{4x^2-5x+1} $
student-questions
math
asked
Aug 13, 2019
by
meena.clay6
1
answer
Solve : $\displaystyle\lim_{x \to 0} \bigg\{ \large\frac{\sin hx-\sin x}{x^3} \bigg\} $
student-questions
math
asked
Aug 13, 2019
by
meena.clay6
1
answer
$NaCl$ crystal has a cubic structure . If the molecular weight of $NaCl$ is $58.46$ and its density is $2.17\;gm\;per\;cm^3$. Find the between two adjacent atoms and the lattice constant in Nacl crystal ?
student-questions
chemistry
asked
Aug 13, 2019
by
meena.clay6
1
answer
A current of $3A$ flows in a circuit shown in the figure. The potential difference between A and B is :
student-questions
physics
asked
Aug 7, 2019
by
meena.clay6
1
answer
How many lines of symmetry does a circle have??
student-questions
math
asked
Aug 7, 2019
by
meena.clay6
1
answer
The value of $\sqrt[5]{(32)^{-3}}$ is :
student-questions
math
asked
Aug 7, 2019
by
meena.clay6
1
answer
Ferric sulphate on heating gives sulphur trioxide . The ratio between the weights of oxygen and sulphur present in $SO_3$ obtained by heating 1 kg of ferric sulphate is $(Fe_2(SO_4)_3 \to Fe_2O_2+SO_3)$
student-questions
chemistry
asked
Aug 7, 2019
by
meena.clay6
1
answer
A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shorter possible path in 15 min. Find the component of resultant velocity of swimmers in perpendicular direction to river flow
student-questions
physics
asked
Aug 7, 2019
by
meena.clay6
1
answer
Simplify : $ \Large\frac{\sqrt{5}+\sqrt{3}}{\sqrt{5}-\sqrt{3}}+\frac{\sqrt{5}-\sqrt{3}}{\sqrt{5}+\sqrt{3}}$
student-questions
math
asked
Aug 7, 2019
by
meena.clay6
1
answer
Solve : $\large\frac{1}{1+x^{(b-a)}+x^{(c-a)}}+\frac{1}{1+x^{(a-b)}+x^{(c-b)}}+\frac{1}{1+x^{(b-c)}+x^{(a-c)}}$
student-questions
math
asked
Aug 6, 2019
by
meena.clay6
1
answer
The co-ordinates of a moving particles at a time t, are given by , $x=5 \sin 10t,y= 5 \cos 10t$. The speed of the particle is (in m/s) is
student-questions
math
asked
Aug 6, 2019
by
meena.clay6
1
answer
Find the value of $9^{\frac{1}{3}},9^{\frac{1}{9}},9^{\frac{1}{27}}$....... upto $\infty$
student-questions
math
asked
Aug 6, 2019
by
meena.clay6
1
answer
How $cosec \theta - \cot \theta=q => \therefore cosec \theta+\cot \theta=\large\frac{1}{q}$
student-questions
math
asked
Aug 6, 2019
by
meena.clay6
1
answer
If $x \sin (\alpha +y)=\sin y $ and $y'=\large\frac{m}{(x^2+2nx+1)}$, then
student-questions
maths
asked
Aug 6, 2019
by
meena.clay6
1
answer
The equation of projectile is $y= 16x - \large\frac{x^2}{4}$ the horizontal range
student-questions
maths
asked
Jul 31, 2019
by
meena.clay6
1
answer
The ratio of powers dissipated respectively in R and 3R in circuit given below is
student-questions
physics
asked
Jul 31, 2019
by
meena.clay6
2
answers
In the figure electric field at $P_1$ is $\bar{E_1}$ and electric field at $P_2$ is $\bar{E_2}$ Find the angle between $\bar{E_1}$ and $\bar{E_2}$
student-questions
physics
asked
Jul 31, 2019
by
meena.clay6
1
answer
Prove that the line $2x + y = 4$ is a tangent to the circle $x^2+y^2+6x- 10y + 29= 0$.
student-questions
maths
asked
Jul 31, 2019
by
meena.clay6
1
answer
Find the value of $9^{\large\frac{1}{3}},9^{\large\frac{1}{9}},9^{\large\frac{1}{127}}......$upto $\infty$
student-questions
maths
asked
Jul 30, 2019
by
meena.clay6
1
answer
The coordinate of a moving particle at a time given by , $x= 5 \sin 10t,y=5 \cos 10t$. The speed of the particle is (in m/s)is:
student-questions
physics
asked
Jul 30, 2019
by
meena.clay6
1
answer
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