Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium.
1 The beam of your boat is the width at the widest part of the boat.  To measure the beam, stand inside the boat and run a measuring tape from the port (left) side to the starboard (right) side at the widest section of your boat.
The stern of a boat is the rearmost portion of the boat or ship.  The stern usually has a tiller or other steering device that helps  the boat turn, The stern might also havâ¦e the motor of the boat if  the boat has an outboard motor. By tilting this motor from one side  to another it helps the boat turn.