For my senior year, the school sprang for a FORTRAN compiler to run on the business office NCR computer. My job was to run the students punch-card decks through the computer during the business office lunch hour. Spent an interim month learning to use FORTRAN as a language usage analysis tool, under tutelage of a Classic Languages professor.
electric forces can be attractive or repulsive, whereas gravitational forces are only attractive.
Whereas electric charges produce electrical forces, regions called magnetic poles produce magnetic forces. The iron filings in the investigation enable the students to see the magnetic forces as magnetic field lines. Unlike electric charges, magnets do not have + and â ends. This is a common misconception.