Questions

The   first   model   of   atom   was proposed   by   J.   J.   Thomson   in 1898.According  to  this  model,  the positive   charge   of   the   atom   is uniformly   distributed   throughout the  volume  of  the  atom  and  the negatively  charged  electrons  are embedded  in  it  like  seeds  in  a watermelon.    This    model    was picturesquely  called  plum  pudding model of the atom

The Prahaar is a short-range, solid propellant, road-mobile ballistic missile designed for tactical strikes against close range targets.It is a surface to surface missile. Prahaar is expected to replace the Prithvi-I short-range ballistic missile in Indian service.