How did evolution of the battering ram affect the design of
the castle gates?

The piece that is pointing out is hitting the gate which is making damages so when it is hitting the gate is starting to break so when it goes in the gates will be destroyed

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.