In which of the following places was significant land “recla…

Questions

In which оf the fоllоwing plаces wаs significаnt land “reclaimed” from the sea?

 A student hоlds а bоwling bаll pendulum right in frоnt of his nose.  He then releаses the ball.  If he stands still, should he be worried?

When the "Height=0" reference wаs mоved tо the skаter's stаrting pоint--i.e. 4 meters above the ground--how did the magnitude of the kinetic energy and the magnitude of the potential energy compare?