They filled the pipe with cement but air pockets formed and built up pressure that then exaploded the pipe
Displacement is the word we use for the distance covered so in this case when a car travels 20 meter east in 1 second, at the end of that 1 second interval a car travels a distance of 20 meter.
And the distance covered is the displacement, so it means that displacement of the car after 1 second is 20 meter east.
Your question ain't that clear but ill try.
Question:
what role did disease play in the Spanish conquest of the Americas?
Answer:
The Americas was a land inhabited by natives with no contact to Europeans until the conquest of Europeans. Europeans have brought guns, religion, and accidentally brought diseases as well. The Native Americans had no immunity to things like "small pox" and it wiped out large amounts of their populations at a time.
Hope this helps :D '_')b
Japan; Japanese uses Kanji characters, which were derived from Chinese and serve virtually the same function.