four solid spheres(radius=r) r present at the corners of  a sq.  .

what is the moment of inertia abt axis passing through any side

 

note the outer spheres r just revolving not rotating (inner ones i.e on the axis must be rotating)

ya

thanks

 

the solids which has same properties along all plane or directions

e.g : amorphous solids

in ncert chem. it is given that work done on the system is +ve and by the system  -ve

BUT

in ncert physics work done on the system -ve and by the system +ve

 

which one is true?

i m actually a medical student

 

please send simple trignometric identities to be used in phy and chem.