<span>Energy of electrons depends on light's frequency, not intensity.</span>
With the growth of industrialization, many countries in
Europe experience an increase of wealth.
This also led to competition among European countries. They saw a need to protect their interest and
with that they began to strengthen their military and this led to formation of
alliances. As competition became more
intense it affected political affairs as well which later lead to war.
President Kennedy and Russian leader Nikita Khrushchev removed the missiles from Cuba and brought them back into the custody of the Soviet Union, which prevented an immediate threat of nuclear war.
The first forms of writing were from egyptions
