A parallel be beam of radiation of intensity 10W and of area of cross section 1cm^(2) is falling on a plane surface at an angle 60^(@) with normal to the surface. The surface is partially reflecting with reflection coefficient 0.5 and absobing the remaining. Choose the incorrect option of the following:
Consider the following statement and choose the incorrect option. a. Large and more numerous nucleoli are present in cells actively carrying out protein synthesis. b. Nuclear pores allow bidirectional movement of molecules. c. Cytoskeleton is a glycolipid structure for mechanical support , motility and maintenance of the shape of the cell. d. Steroidal hormones are synthesized by Golgi complex .
A solid glass hemisphere of density d and radius R lies (with curved surface of hemisphere below the flat surface) at the bottom of a tank filled with water of density rho such that the flat surface of hemisphere is H depth below the liquid surface. Weight of water + tank is W_(1) and that of hemisphere is 'W_(2) . W Then choose the incorrect options
The system is released from rest with both the springs in unstretched positions. Mass of each block is 1 kg and force constant of each spring is 10 N//m . Then choose the incorrect option(s). Assume puleys and strings are massless and all contacts are smooth. (g = 10 m//s^(2))
