This is how Churchill expressed inability to predict what Soviet Union will at the start of World War 2. The timeline below show why he could be puzzled:
a) August 23, 1939 - Soviet Union and Germany sign non-aggression pact
b) September 1, 1939 - Germany invades Poland (then ally of Britain and France).
c) September 3, 1939 - Britain declares war on Germany as a consequence of German's invasion of Poland.
d) September 17, 1939 - Soviet Union invades eastern Poland. Poland is defeated and partitioned between Germany and Soviet Union.
Therefore from Churchill standpoint: Soviet Union is allied with Germany, whom are at war with Britain. Go figure what Stalin is going to do?
Answer: New technology methods
Explanation: Techonology itself is developing quick from day to day. It is important to try and add new things that can improve it. So developing a specific method that is very well planned and established can advance technology.
Answer:
Metre. ... The metre is defined as the length of the path travelled by monochromatic light in a vacuum in 1299 792 458 of a second.
Explanation: