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*Image* A plank of mass 4 kg is placed on a smooth horizontal surface. A block of mass 2 kg is placed on the plank and is being acted upon a horizontal force F=0.5t , where F is in Newton and t is in s. if the coefficient of ...

Two similar balls are connected by a string of length 2l and are placed at a separation l on smooth horizontal table. one of the balls is given a velocity v0 shown in the figure . What are velocities of the balls when the str ...

Find the domain of k if nCr = (k2 - 2k - 7 )n+1Cr+1. ...

*Image* each palte shown above has surface area A on one side and the separation between consequitive plates is d.the emf of the battery connected is 10 volts.find the magnitude of charge supplied by the battery tp each of th ...

Why ICl7 does exist but ClI7 does not? Why SF6 does exist but SH6 does not? ...

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Can v say this ???? Electrolysis is a forced reaction. ...

In halogenation reaction of ketones, why is glacial acetic acid always the most preferred solvent ?? ...

A solid mixture(5.0gm)consisting of lead nitrate and sodium nitrate was heated below 600°c until the weight of the residue was constant.If the loss in weight is 28%,find the amount of lead nitrate and sodium nitrate in the m ...

If the latitude of a place is 30°, the pole star will be seen at an altitude of A. 30° B. 0° C. 90° D. 60° ...

if f(x) nd g(x) r twice differentiable functions on [0,2] nd if f''(x) = g''(x) nd f' (1) =4 , g' (1)=2 nd f(2)=3 , g(2)=9 then find g(4)- f(4)?? ...

ai>0;i=1,2,3,4.........n (n-1)s=a1+a2+a3+a4+..............an prove that a1.a2a3..........an>= (n-1)n(s-a1).(s-a2).(s-a3)(s-a4).........(s-an) ...

The Degree of dissociation of I2 molecule of 1000*C and under atmospheric pressure is 40% by volume.Find the total equilibrium pressure on the gas if the dissociation is reduced to 20% at the same temp. ...

I have selected these colleges to give exams of...... IIT AIEEE VIT BITS DCE & CG-PET ( if it is conducted).... Which xams I shud not give....if anyone has names of some much better college then plz suggest... Reply soon its ...

If the roots of ax2 + 2bx + c = 0 be possible and different then the roots of (a+c)(ax2+2bx+c) = 2(ac-b2)(x2+1) will be impossible and vice-versa.............prove it. ...

How would you convert Benzene to 1,4 - cyclohexadiene in one step? ...

Anthraquinone undergoes MPV to give _______. anthraquinone is structure is here --- http://en.wikipedia.org/wiki/Anthraquinone ...

A travelling wave pulse is given by, y= 10/ 5+(x+2t)2 here x and y are in meter and t in second . In which direction and with what velocity is the pulse propagating? What is the amplitude of pulse? ...

Ques1) Calculate the change in the value of g at altitude 45 defree. Take radius of earth = 6370 km. Ques2) Determine the speed with which the earth would have to rotate on it's axis , so that a person on the equator would we ...

given g(f(x))=x.then f(x) is one-one/onto/both/one one but not necessarily onto ...

A sample of 210 A which is emitter with T1/2 = 138 days is observed by a student to have 2000 disintegrations per second. The mass of 210A sample is 1.) 1.0 × 10-11 kg 2. ) 1.7 × 10-11 kg 3). 1.7 × 10-11 gm 4.) 1.2 × 10-1 ...

In case of Cu+2, [Cu(en)3]2+ is more stable then [Cu(en)2(NH3)2]+2 What's the reason? ...

The displacement of a wave disturbance propagating in the positive x-direction is given by y= 1/(1+x2 ) at t=0 and y= 1/ [1+(x-1)2] at t=2s where x and y are in meter. The shape of the wave disturbance does not change during ...

Does anyone have any info on 'Deflection Magnetometer' ? I need to submit my ISC Physics project on that topic and i could not find much on the net.. If anyone has ne ebook or info on it,,pls do help,as currently i have only ...

A compound C7H12 undergoes Ozonolysis to form B which on aldol condensation gives 1-acetylcyclopentane. What are the structures of the compds involved? ...

*Image* A conductor AB of length L is carrying a current 'i' is placed perpendicular to a st. conductor XY carrying a Current I as shown.The force on AB will act A. Upward B. Downward C. To the right D. To the left Explain wh ...

What exactly is the role of boiling xylene in Rosenmund Reduction ?? ...

i dnt wnt ans,sum1 pls explain me the capacitance when charged inner sphere(radius a) is earthed.charged outer sphere has radius b.cant derive it. ...

*Image* question of paper-2 jee-09 Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions φp = 2.0 eV, φq = 2.5 eV and φr = 3.0 eV, respectively. A light beam con ...

we all know what is a virtual image and what is a real image....... now in a mirror and a lens all the images whenever v is formed after the mirror it is a virtual image but in some cases even the negative images or the image ...