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sir plz help me with dis numerical'A particle is moving along a circular path with constant speed v.What is the change in velocity when the particle completes one fourth of a revolution?
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Ques. A ball is dropped from a height of 5 m onto a sandy floor and penetrates the sand up to 10 cm before coming to rest . Find the retardation of the ball in sand assuming it to be uniform .
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Ques . A car travelling at 60 km/h overtakes another car traveling at 42 km/h . Assuming each car to be 5 m long, find the time taken during the overtake and the totl road distance used for overtake .
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a mixture of feo and fe3o4when heated in air to constant weight gains 5%ofits weight the%of feo in the sample is
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please explain reaction mechanism of chloroform and don`t refer us to some other link
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A radioactive nucleus of mass M emits aphoton of frequency V ad the nucleus recoils. the recoil energy will be?
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A projectile is fired at an angle of 45 with the horizontal. Elevation angle of the projectile at the highest point as seen from the point of projection?
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A small mass attached to a string rotates on a frictionless table top.if the tension in the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2 then the kinetic energy of the mass will be?
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what is imbibition? absorption or adsorption?
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1st receptor of a reflex arc is? sensory recptor or sensory neuron?
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A body starts from rest from a point at a distance ro>Re from the centre of earth.It reaches the surface of earth.What is the velocity acquired by the body?
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two small bodies of masses 10kg and 2okg are kept a distance 1.0m apart and released.Assuming that only muutual gravitational forces are acting,find the speeds of the particles when the sepration decreases to 0.5m.
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Why is dispersion of light not observed in case of a glass slab?
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What does exactly make heavy nucleus unstable?
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When a tiny circular obstacle is placed in the path of light from a distant source a bright spot is seen at the centre of the shadow of the obstacle. explain why?
Asked by dipankar 2 weeks ago , View All Answers

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In a single slit diffraction experiment,the width of the slit is made double the original width. how does this affect the size and intensity of the central diffraction band?
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What is the shape of the wavefront in each case
i) light diverging from a point source.
ii) light emerging out of a convex lens when a point source is placed at its focus?
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why are optical fibres extensively used for transmitting audio and video signals? give the working of core and cladding.
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A potential difference V is applied to a copper wire od diameter d and length l. what is the on the electron drift speed of-
i) doubling l
ii) doubling V
iii) doubling d?
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