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.
hull-the frame or body of ship. keel-one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability.. hull-the frame or body of ship. keel-one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability. keelson-a longitudinal beam connected to the keel of ship to strengthen it.