Questions asked by Wricheek
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Can anyone explain the concept of derivatives?
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In a Covalent Bond how The same electron can rotate in two atoms?
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ABC is a Right Triangle ,right angled at B. C(o,r) is the incircle and o is the incenter of the triangle.AB=5,BC=12,what is the radius of incircle?
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An object of length 2cm is placed at a distance of 2.5*f from a concave mirror where f is its focal length. what is the length of the IMAGE?
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A rod of length f/2 is placed along the axis of a concave mirror of focal length f.IF the near end of the REAL IMAGE formed by the rod just touches the far end of the ROD,what is its magnification?
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I have some chair and tables.If i place two chair at each table ,I have extra chair.If i place 3 chairs at each table,i have one table with no chairs.What is the sum of the total umber of tables and chairs?
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sinx+sin^2x+sin^3x=1 the what is cos^6x -4cos^4x+8cos^2x=?
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7cosec theta -3 cot theta =7,then what is the value of 7cot theta-3 cosec theta ?
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How to give symbol of modulus?
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8g of "E"_2"O"_3 contain 5.6g of "E". How many moles of "E" does a 16.8-g smaple of element "E" contain?
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For the reaction,2x+3y+4z rarr 5w
Initially if 1 mole of x,3 mole of y and 4 mole of z is taken and 1.25 mole of w is obtained then what is the % yield of this reaction?
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When 2 moles of hydrogen is heated with 2 moles of iodine,2.96 moles of hydrogen iodide is formed.what is the equilibrium constant for the formation of hydrogen iodide?
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A block of metal wheighing 2 kg is resting on a frictionless surface,if struck by a jet releasing water at the rate of 1kg/s and at a speed of 5m/s.what is the initial acceleration of the block ?
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A dish of mass 10g is kept horizontally in air by firing bullets of mass 5g each at the rate of 100/s. I the bullets rebound with the same speed,what is the velocity with which bullets are being fired?
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A ball of mass 0.20 kg falls freely from a certain height and rebounds elastically with a speed 10m/s.What is the change in momentum of the ball?
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If sin theta + cos theta =p, what is sin^2 theta + cos^4theta in terms of p ?
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What are progessive lens?
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When are important subjects like economics are going to be added?
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Why most of the alkanes are Hydrophobic in nature?
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What is the principle of LIKE DISSOLVES LIKE ,EXPLANATION needed,and also limitations?
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Sea water contains 65 xx10^-3 "g/L" of bromide ions. If all the bromide ions are converted to produce Br_2,how much sea water is needed to prepare 1 kg of Br_2?
please tell the method.
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What is the strength in g/ litre of a solution of H_2SO_4,12 ml of which neutralized 15 ml of N/10 NaOH solution?
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200 ml solution of H_2O_2 completely oxidises 125g Fe^+. Find out the molarity and volume strength of H_2O_2?
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WHAT is the domain of defination of log_4 (-log_1/2 (1+ 6/root(4)x) -2)?
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What is the domain of defination of y= log_10 (1- log_10 (x^2 -5x +16))?
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A particle is projected from the origin (0,0) in the xy plane at angle of 37^o with the x axis with a speed of 10 ms^-1, its acceleration being (-5 hati + 10 hatj) ms^-2. What is the speed of the particle when the x-coordinate is again zero?
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The equation of the trajectory of particle is x=sqrt3 y-5y^2.The particle is at t=0 at origin.Its acceleration is veca=-10 hati.What is its initial velocity?
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Given 3 TanA*TanB=1,show that 2cos(A+B)=cos(A-B)
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What is the velocity of a particle for t=0 to t=10 whos acceleration is
veca =3t^2 hati+5t hatj-(8t^3+400)hatk?
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An electron in a hydrogen atom in its ground state absorbs twice of its ionization energy what is the wavelength of the emitted electron?
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Why cant we upload more that one pictures on answer? It takes a long time to write coding ,especially while in calculation,we can easily write on paper and upload the picture?
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A butterfly is flying with velocity 10 i +12 j m/s and wind is blowing along x axis y
with velocity u. If butterfly starts motion from A and after some time reaches point B, What is the value of u ?
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What is the proof of E=mc^2?
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Having errors while solviing maths is a common problem,is there any tip to study longer better and accurate?
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Three rods each of mass M and length L, are joined together to form an equilateral triangle. What is the moment of inertia of a system about an Axis passing through its centre of mass and perpendicular to the plane of the triangle?
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At 627^@"C" and "1 atm", "SO"_3 is partially dissociated into "SO"_2" and "O"_2 .
If the density of the equilibrium mixture is "0.925 g/L", what is the degree of dissociation?
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A small block is placed on a wooden plank which is undergoing SHM in vertical direction with a period of T.What is the maximum amplitude of motion so the block does not leave the plank?
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Let x,y,z are three real and distinct numbers which satisfy the Equation
8(4x^2+y^2)+2z^2-4(4xy+yz+2xz)=0,then Which of The following options are correct?
(a) x/y=1/2
(b)y/z=1/4
(c)x/y=1/3
(d)x,y,z are in A.P
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A point moves in x-y plane according to vec r=3cos(4t)veci +3(1-sin4t) vecj. What is the distance travelled by the particle in 0.5 sec ?
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A bead of mass m can slide on a thin vertical rod,with sliding coefficient mu =0.4.The rod is translated horizontally with a constant acceleration of a. QUESTION below.?
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What is the range of the function y=sqrt(1-cosxsqrt(1-cosx(sqrt(1-cosx ......oo ?
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How to Remove Nitro Group from nitrobenzene ring ?