it uses a loop undergroung, better know as a municipal waer supply
chilled water
chilled water
Local municipal water supply
It is a primary source.
This is a primary source.
A picture can indeed be a primary source.
it is a primary source
You need a heat source, a condensing tube and flasks.
It is a primary source because it was taken at the time.
yes,a coin is a primary source
Primary Source
A primary source provides firsthand information or data, while a secondary source interprets or analyzes primary sources.