A water balloon is dropped off the top of a building and bursts when it hits the ground 6 seconds later. What is the height of the building?

The building is 176.4 meters high.

Explanation:

We use the formula for kinematics of an accelerated object (in this case acceleration of gravity):

Distance travelled = 1/2 g  t^2

Distance travelled = 1/2 9.8  (6)^2 = 176.4 meters

G1

Explanation:

Some specialized cells such as red blood cells, neurons lose their ability to replicate in the G1 phase of cell cycle. G1 phase is indeed the terminal phase of the cell division as now cell do not divide any more. These cells do not have the necessary nucleus for further cellular replication in the G1 phase. They become mature need not divide anymore.