Questions

Kepler’s  laws  of  planetary  motion state  that  (a)  All  planets  move  in elliptical orbits with the Sun at one of  the  focal  points  (b)  The  radius vector  drawn  from  the  sun  to  a planet  sweeps  out  equal  areas  in equal  time  intervals.  This  follows from  the  fact  that  the  force  of gravitation on the planet is central and  hence  angular  momentum  is conserved.  (c)  The  square  of  the orbital   period   of   a   planet   is proportional  to  the  cube  of  the semi  major  axis  of  the  elliptical orbit of the plane.

The Cathedral of Notre Dame is located in paris(France) . It was one of the earliest French Cathedrals to be built in the Gothic style. It was built between A.D 1163 and AD 1270. About the 12th century, a new style- the Gothic -was developed in France.

We all human beings i.e man or woman.

As baby we crawl, as an adult we walk and as old aged we use walking stick for support.