source is an beginning or origin
Cards with a source?
By definition of a historical primary source (by someone with direct knowledge from the time), a original political cartoon is a primary source. By definition of an English primary source (it is printed), it is a primary source. By definition of the final form of primary sources (see definition of primary source on www.answer.com), it is based on someone's interpretation of the time and is thus a secondary source.
Where something came from.
The definition of biography source is the place where the life story of a person is derived from. This shows where the facts have been obtained from.
The most basic definition of a primary source is an original document, image or artifact that has not been interpreted by another person.
source that will run out
To ask a trusted source.
the definition of the open circuit is a thing of energy that does not have a source of energy
A secondary source is someone who heard about it from a primary source and did a report, broadcast,article etc. on it.
the firsthand record
Directed to a source for help or information.
he Source of a river is the start of the river. It's often found in the mountains.
Having the source code open for anyone to edit or modify for free.
An electrical power source that has no liquid in it.
The invention of measuring tools is prehistoric, therefore by definition there won't be a primary source.
a source that can never run out. For example the Sun.
Head is the source and mouth is where it ends.
pollution that comes from a specific site
Copying files to your hardware from another source.
Resourses means a source of supply or support. Resourses also means a natural source of wealth or revenue.
The definition of thermal conduction is heat transfer. Thermal conduction is when heat is transferred from one source to another.
(A) primary source; (B) secondary source