
A lead ball and a rubber ball having same mass, collide normally with a vertical wall with the same velocityh. The lead ball falls down after striking, but the rubber ball bounces back. Then which of the following is true and ...

A fat hose pipe is held horizontal by a fireman. It delivers water through a constricting nozzle at i liters/ sec. It by increasing the pressure the water is delivered at 2 liter/sec. the fireman now has to a. push forward tw ...

a metal spherevplaced in a uniform electric field E alon xaxis, then ∂V/∂x a) is uniform both inside and outside the sphere b) is uniform outside but nonuniform inside the sphere c) is uniform inside but nonuniform out ...

the potential decreases uniformly from V1 to V2 along x  axis in a coordinate system as one moves from (  a,0) to (+a,0). The field at origin is (a) must be (V1  V2)/2a (b) cannot be less than (V1V2)/2a (c)must be smaller ...

a rope ladder with length `l` carrying a man with mass `m` at its end is attached to the basket of a ballon with a mass `M`.the entire system is in equilibrium in the air.find the work the man should do to ityclimb into the b ...

can anyone explain to me in detail about coriolis forces? ...

a lightning arrester is connected to the earth by a circular copper pipe.after lightning strikes,it is discovered that the pipe became a circular rod.explain this phenomenon. ...

find the temperature of a gas contained in a closed vesselif its pressure increases by 0.4%of the initial pressure when it s heated by 1*celcius ...

when ice melts at 1°...will the enthalpy increase or decrease..,..answer given is enthalpy increases ...

three plates A,B,C have charges Q1 Q2 and Q3 now there is said to be redistribution of charges...what will happen to the charges on each surface? ...

*Image* find flux through hemispherical surface in each case ...

two motor cars start from a point A simultaneously and reach at point b after 2hrs. The first car travelled half of the dist. ata speed of 30km/hr & the other half at a speed of 60 km/hr. The second car covers the entire dist ...

The conducting, concentric , hollow spheres A and B have radii a and b respectively, with A inside B. Their common potential is V. A is now given some charge such that its potential becomes zero. The potential of B now will b ...

A solid sphere is rolling without slipping on the rough ground .it collides elastically with an identical sphere at rest.there is no friction between the two spheres .radius of each sphere is R amd mass is m. Ques: linear vel ...

two current carrying wires may attract each other.in absebce of other forces,the wires will move towards each otherincreasing the kinetic energy.does it contradict the face that magnetic force cannot do any work and hence can ...

A ring rotates about its axis z which is perpendicular to its plane of roatation xy. At a certain instant the acceleration of the particle on the ring is {(6)i(8)j}m/s2. find the angular acceleration of the ring and the angu ...

*Image* here a charge 2q is given to the shell c and shell a has got q charge inside it....and it is earthed...calculate the charges on the surface of each shell...also pl hilite the concept bhind it ...

A long cylinder of radius R is displaced along its axis with constant velocity u inside a stationary coaxial cylinder of radius r.The space between cylinders is filled with viscous liquid.Find the velocity of liquid as a fun ...

consider a region of uniform electric field let a charge paricle is moved by some external force such that work done by electric force is zero, then is it necessary that work done by external force will also be zero as W ext. ...

shw dat if a collison betwn a fast elctron and a elctron @ rest is to lead to d production of an elctron positron pair then d kinectic enrgy of d fast elctron must b at least 6mc^2 wer m is d mass of eclrton and c is d speed ...

While a capacitor is charging ,is there a decrease in displacement current value in connecting wires? ...

what do u mean by space average of velocity?? is there any formula for it??...if yes, plzz tell me... ...

Four particles each having a charge q, are placed on the four vertices of a regular pentagon. The distance of each corner from the centre is a. Find the electric field at the centre of the pentagon.. ANS is q/(4πεa2) plz gi ...

*Image* find the potential energy of point charge q1 ...

surface tension ...

In a series LCR circuit ,current=11A when applied voltage=220V.Voltage across unknown capacitor=220V.If value of resistor=20 ohm then voltage across unknown conductor is_____ ...

metal plates form a paralel plate capacitor maintained @ certain pd. when 3 mm thick slab is introduced bw plates inorder 2 maintain sm pd , distance bw plates is increasedd by 2.4 mm. wat is dielectric const of medium >&g ...

culindrical tank 10 m high has internal diametr 4 work req 2 fill with wit H2O if water pumped in botom edge answer is 6.15 mJ . HOW CUM I DO W=F*H/2 COS180 H/2 =5 an f=pressure * area area 3.14*4 presuure will b ...

any1 knows poro prism i got a question poro prism is equilateral prism right angula prism any angle prism i have red noyhin nout thia poro prism reply>>? ...

a cylinder of mass 'm' and radius 'r' is rolling widout slipping on a horizontal surface wid angular velocity ω0. the velocity of center of mass of cylinder is ω0r. the cylinder comes across a step of height ...