The Soviet Union 's participation in World War II began with the Battle of Khalkhin Gol, with Japan in Mongolia in 1939. Later that year, protected with the Molotov-Ribbentrop Pact, it invaded eastern Poland about three weeks after the Germans invaded the west of the country.he Soviet Union 's participation in World War II began with the Battle of Khalkhin Gol, with Japan in Mongolia in 1939. Later that year, protected with the Molotov-Ribbentrop Pact, it invaded eastern Poland about three weeks after the Germans invaded the west of the country.
An altimeter does not actually measure altitude directly, but rather just atmospheric pressure. So an altimeter is actually a barometer created for a specific purpose. The altimeter uses the changes in atmospheric pressure to determine the changes in altitude.
How does a pressure altimeter work? Photo: Left: A pressure altimeter is a more sophisticated version of an aneroid barometer, like this. Instead of showing the pressure on the dial, it shows heightâbut that's okay because there is an exact correlation between the two.