Questions asked by Shreya
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The solubility of Pb(OH)2 in water is 6.7 *10^6 M.What is its solubility in a buffer solution of pH=8 ?

200 ml of aqueous solution of HCl(pH=2) is mixed with 300 ml of an aqueous solution of NaOH(pH=12).what is the pH of the resulting solution?

A ceiling fan starts rotating from rest with angular acceleration varying as #A=D^(1/2)# where D is the angular displacement magnitude.how does its angular velocity vary with respect to D?

Two particles A and B of mass 2 kg and 3kg are thrown from the top of a tower such that A moves horizontally with vel. of 30m/s and B moves vertically up with vel. of 20m/s(g=10m/s^2).What is the acceleration of the centre of mass of the system?

Two persons A and B of mass 50 kg and 100 kg are standing at extremities of a boat of mass 100 kg with length 5 m floating at rest in still water.What the distance moved by the boat if they interchange their positions ?

If moment of inertia of a point particle at a distance r from an axis would have been defined as I=mr,then what will be the M.I of an uniform rod of mass M and length L about an axis passing through its centre and perpendicular to the rod?

The temperature of a #"15mL"# strong acid solution increases by #2^@"C"# when #"15 mL"# of a strong base is added. By how much should the temperature increase if #"5 mL"# of each are mixed?

A particle of mass m is projected with initial speed u at an angle of 45 degree with the horizontal.What is the torque of the force on the object about point of projection at the highest point?

Between two positive real nos. a and b there are 2 G.M's G_1 and G_2 and a single A.M A.The G.M between G_1 and G_2 is M.Can you prove that M^3=ab(A^3)?

If a,b and c are in G.P and the equations ax^2+2bx+c=0 and dx^2+2ex+f=0 have a common root,can you prove that d/a,e/b and f/c are in A.P?

A person when asked about his age,said,"The day before yesterday i was 15 and i will be 18 the next year".Is it possible that he is telling the truth?

What is the concentration of ferrous ion?

What is the value of #gamma# for a polyatomic gas?

Find the value of x?

A gas is filled in a vessel of volume V at 35 degree centigrade.To what temperature should it be heated in order that half of the gas may escape out?

What is the exact mechanism that causes Parkinson's disease?

A solid sphere of radius R is pulled by a force T acting at the top of the sphere . The sphere is in pure rolling. what is the work done by the force when the centre of mass moves by a distance 'd'?

An arched bridge is to be designed that cars may pass over safely a a speed of 180km/h without jumping off the road.what should the minimum or maximum value of the radius of curvature of the arch be?

Why does methyl(CH3) show electron donating effect?

Find the derivative of #f(x)=log(sin(x))# using the first principle?

Please help?

Which of the following is more stable?

How can i derive newton's law of cooling?

What is the difference between SHM and oscillatory motion?

In the equation of a standing wave where y=2Asin(kx)cos(wt),what does 'w' represent?is it representing the standing wave's frequency or the frequency of any particle in that wave?

The sound intensity level at a point 4 m from the point source is 10 dB,then what will be the sound level at a distance 2 m from the same source?

What do you mean by the resonance frequency of a tuning fork or a stretched string?

When do we use the prefixes iso,neo tert,sec when we name organic compounds?

Please help with this physics problem?

What is the coefficient?

Can anyone prove this please?

Even if i keep on increasing the frequency,why does the no of photoelectrons emitted from a metal surface reach a maximum and remain constant at that value?

What is the relation between photoelectric current and the intensity of the photon provided?

What do you mean by an electron wave?how come an electron generates a wave while it moves?

What are the nodal planes in #3d_(x^2y^2)# orbital?

The resultant of 2 forces at right angles is 17 N.if the maximum resultant is 23 N,then what is the value of the greater force?

Please solve with a detailed explanation?

Please help?

The acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity V_O.The distance traveled by the particle in time t will be?

Differentiate with respect to x from the first principle?

Why is cyclo octatetraene nonaromatic?Please give a detailed explanation?

A train accelerates from rest at a constant rate #alpha# for distance X and time T(a).after that it retards at a constant rate #beta# for distance Y and time T(b).Which of the following relations is correct?

If the equation of a progressive wave is #y_1=asin(omega tkx)#,then what is the equation of its reflected wave at a free boundary?

What is the charge on #Co# in #[Co(CN)_6]^(3)#?

Is #Ni(CO)_4# a complex compound?

If the vibrations of a string are to be increased to a factor of 2,then what should the tension in the string be made?

The time period of S.H.M of a particle is 12 seconds. What is the phase difference between the position at t=3 s and t=4 s?please give a detailed explanation.

What is the IUPAC name?

Why is weightlessness experienced by astronauts when a satellite revolves around the earth?

Why are rockets launched eastward at Cape Canaveral?

A vertical rod A of mass m rests on the inclined surface of a wedge B of mass M?

In the arrangement the coefficient of friction between the 2 blocks is#mu=1//2#What is the force of friction acting between the 2 blocks?

What is the difference between gerund and participle?

What is the relative error in the effective resistance in a parallel combination?#R_effective=frac{R_1xxR_2}(R_1+R_2)#.So what will #Delta(R)//R# be?

How can the temperature of a gas be raised without supplying any heat to it?

Please help?

Which of the two #O_2NCH_2CH_2O# or #CH_3CH_2O^# is expected to be more stable and why?

Please solve this?

Find therange of #f(x)=x1#?

Between the roots of the quadratic equation #3px^2 10px +5q#=0(#p>0,frac{q}p<frac{5}3#),an odd number of A.M's are inserted and their sum exceeds their number by 10.Find the number of A.M's inserted?

If #cos(alphabeta) +cos(betagamma) +cos(gammaalpha)=frac{3}2#,can you prove that #cos alpha +cos beta +cos gamma=0# and #sin alpha +sin beta +sin gamma =0#?

Vertices A(1,1),B(4,2) and C(5,5) of a triangle are given.can you find the equation of the perpendicular dropped from C to the internal bisector of angle A?

Through the vertex S of a parabola the chord SP and SQ are drawn at right angles.Show that the straight line PQ intersects the axis at a fixed point?

Please solve q.26 part one?
If #cot((alpha+beta)/2)+cot((beta+gamma)/2)+cot((gamma+alpha)/2)=0#
**Rtp**
#cosalpha+costheta+cosgamma=3cos(alpha+beta+gamma)#

Prove that: #tan 70tan 50+tan10=sqrt(3)#?

Solve for x,y?

If S be the sum,P be the product and R the sum of reciprocals of n terms in a G.P,prove that #P^2=(frac{S}R)^n#?

A particle moves in the xy plane with velocity #v_x#=#8t2# and #v_y#=2.If it passes through the points #x=14# and #y#=4 at #t#=2,what is the equation of the path?

3 particles start from origin with velocity #u_1,u_2 and u_3#.They are moving with constant velocities.Find the relation between #u_1,u_2 and u_3# so that all 3 particles lie on the same plane?

Please Help?

A liter of air containing 1% Ar is repeatedly passed over hot Cu and hot Mg till no reduction of volume takes place. The final volume of Ar will be?

In #ddotCX_2#,both the electron get paired up in #sp^2# hybrid orbital.Thus,#ddotCX_2# exists in the form of singlet state.Why?{here #X# refers to halogen}

A spring balance has a scale that reads from 0 to 50 kg.The length of the scale is 20 cm.A block of mass #m# is suspended from this balance,when displaced and released,it oscillates with a period 0.5 s. What is the value of #m#?[#g=10 "m" s^(2)#]

2 point masses each having mass #m# are placed at a distance #2a#.Escape velocity for a mass #m# projected from position P?

The motion of a body falling from rest in a medium is given by the equation #d/dt(v)#=12#v#. What is the velocity at any time?Express in terms of time only.

A body moves in a straight line under the retardation #a# which is given by #a=bv^2#, (#b# is a positive constant and #v# represents the velocity). If the initial velocity is #2m/s#, what is the distance covered in time #t#=2 seconds?

Find the number of solutions of this equation?

A bag contains tickets numbered 1 to 30.Three tickets are drawn at random from the bag.Find the probability that the maximum number on the selected tickets exceeds 25?

What is the acceleration of mass #m#?[take g=10#m/s^2#]

What is the IUPAC as well as the common name?[CH3Methyl group;C2H5Ethyl group]

Please help?

Can someone explain to me the difference between potential and potential energy in details?And,work done in a conservative force field is the difference in potential or potential energy?

During the preparation of picric acid,sulphonation is carried out first and after that nitration.Why?And why does the sulphonic group get replaced by the nitro group?

#Ca(OCl)Cl and H_2O# is added to #C_2H_5OH# to get compound A.After that we add #HNO_3# in one pathway X to get a product B .We add #CH_3COCH_3# to A in another separate pathway Y to get product C.What is A,B and C?

When does #ROH# dissociate as #RO^()# and #H^(+)# and as#R^(+)# and #OH^()#?

Why do linked genes show a lesser inclination towards crossing over than incompletely linked ones?

The electronic configuration of silver is#[Kr] 4d^(10) 5s^(1)#.so it requires only one electron to attain stable configuration.So why does it act as a Lewis acid?