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CBSE Class 11 Science Free Doubts and Solutions

CBSE - XI Science - Physics

For 2 vectors A and B, if | A+B | = | A-B | then angle between A  and B is

Asked by arushidabhade 21st July 2019, 8:01 PM
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CBSE - XI Science - Physics

The position of a particle is given by r = 4ti +2t^2j)m. Its Y component of velocity at t =1s is

Asked by arushidabhade 21st July 2019, 7:58 PM
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CBSE - XI Science - Physics

Velocity of a particle moving in a plane is given by v=( 4i +2t^2j) m/s. Avg. Acceleration of particle for time interval between t=0 to t=2 is

Asked by arushidabhade 21st July 2019, 7:56 PM
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CBSE - XI Science - Physics

A particle is at rest at origin at t =0 it is having a constant acceleration a = (i+j) m/s^2. Position of particle at t=4s is

Asked by arushidabhade 21st July 2019, 7:54 PM

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CBSE - XI Science - Physics

Initial velocity of a partial moving with constant acceleration a = - 10j m/s^2 is u = (20i +10j) m /s its speed at t =3 is 

Asked by arushidabhade 21st July 2019, 7:52 PM

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CBSE - XI Science - Mathematics

The minute hand of a watch is 1.5 cm long far does its tip move in 40 minutes 

Asked by durgassonawane 21st July 2019, 5:27 PM
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CBSE - XI Science - Physics

A man can throw a stone to a maximum distance of 80m.the maximum height to which it will rise in meter,is  

Asked by bhrjitu 20th July 2019, 3:32 PM
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CBSE - XI Science - Chemistry

How can get the question and answers of NCERT books of Physics, Chemistry, Biology for I.Sc. (XI)?  

Asked by shekhar2889 20th July 2019, 3:24 PM
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